1 00:00:40,480 --> 00:00:42,240 Fresh water. 淡水 2 00:00:42,240 --> 00:00:45,280 Some animals can't breed without it. 有些动物没有它就不能繁殖 3 00:00:48,600 --> 00:00:51,040 But correctly predicting its arrival 但是正确地预测它的到来 4 00:00:51,040 --> 00:00:53,560 can be the difference between success 成功与否的区别是什么 5 00:00:54,880 --> 00:00:56,720 and disaster. 和灾难 6 00:01:00,880 --> 00:01:03,040 A giant African bullfrog. 一只巨大的非洲牛蛙 7 00:01:07,280 --> 00:01:09,640 He's the size of a dinner plate, 他有餐盘那么大 8 00:01:09,640 --> 00:01:11,560 and he weighs half a kilo. 他有半公斤重 9 00:01:14,520 --> 00:01:17,440 He's been buried for the last six months. 他已经被埋葬了六个月了 10 00:01:19,880 --> 00:01:22,280 Now he needs to find a mate . 现在他需要找个伴侣 11 00:01:24,600 --> 00:01:26,440 and he doesn't have long. 而且他没多久 12 00:01:36,080 --> 00:01:40,480 The newly-arrived rains have created pools that trigger 新来的雨水形成了水池 引发了洪水 13 00:01:40,480 --> 00:01:42,520 this year's mating jamboree. 今年的交配狂欢 14 00:01:45,640 --> 00:01:47,800 He's not the first to the party. 他不是第一个来参加聚会的人 15 00:01:47,800 --> 00:01:52,320 And what is more,it will be all over within the next 24 hours. 更重要的是 这一切将在未来24小时内结束 16 00:01:59,120 --> 00:02:02,680 This pool is already crowded with males, 这个游泳池已经挤满了雄性 17 00:02:02,680 --> 00:02:06,000 like a downtown bar on a Friday night. 就像周五晚上市中心的酒吧 18 00:02:08,080 --> 00:02:11,080 The females will soon arrive,ready to lay their eggs. 雌性很快就会到达 准备产卵 19 00:02:11,080 --> 00:02:13,680 So this is where a male needs to be. 所以这就是男性需要的地方 20 00:02:15,320 --> 00:02:18,440 But the battle-scarred faces are a warning. 但那些饱经风霜的面孔是一个警告 21 00:02:20,680 --> 00:02:23,520 This pond is not for the faint-hearted. 这个池塘不适合胆小的人 22 00:02:32,160 --> 00:02:35,840 The males occupy the centre of the pond and fight to hold 雄性占据了池塘的中心 并奋力争夺 23 00:02:35,840 --> 00:02:37,240 a place there. 那里有个地方 24 00:02:42,840 --> 00:02:46,960 Their calls will attract females,but they will have to get 它们的叫声会吸引雌性 但它们必须 25 00:02:46,960 --> 00:02:50,800 to the centre if they're to meet the strongest males. 如果他们想见到强壮的雄性 就去中心 26 00:02:52,760 --> 00:02:57,000 So if a male is going to mate,that's where he needs to be. 所以 如果雄性要交配 那就是它需要的地方 27 00:02:58,720 --> 00:03:02,320 Which,for a latecomer,means running the gauntlet. 对于一个迟到的人来说 这意味着挑战 28 00:03:21,680 --> 00:03:24,160 As any prize-fighter knows, 任何职业拳击手都知道 29 00:03:24,160 --> 00:03:26,680 dodging the hits is all part 躲避打击是一切的一部分 30 00:03:26,680 --> 00:03:28,120 of winning the bout. 赢得这场比赛的希望 31 00:03:39,400 --> 00:03:42,880 And by doing what frogs do best, 通过做青蛙最擅长的事 32 00:03:42,880 --> 00:03:45,680 he reaches the centre unscathed. 他毫发无损地到达中心 33 00:03:52,400 --> 00:03:55,160 But his victory may not last long. 但他的胜利可能不会持续很久 34 00:03:57,440 --> 00:04:00,680 New contenders are arriving. 新的竞争者正在到来 35 00:04:02,720 --> 00:04:04,480 And this is one of those they've all 这是他们所有人中的一个 36 00:04:04,480 --> 00:04:07,440 been waiting for - a female. 一直在等待——一个女人 37 00:04:08,680 --> 00:04:11,680 She wants to get to the centre too. 她也想去中心 38 00:04:11,680 --> 00:04:14,840 After all,that's where she will meet the strongest males. 毕竟 她会在那里遇到最强壮的男性 39 00:04:18,600 --> 00:04:21,160 Swimming there underwater is her best chance 在那里游泳是她最好的机会 40 00:04:21,160 --> 00:04:22,840 of reaching them. 我很想找到他们 41 00:04:24,360 --> 00:04:27,920 If a male is to mate,he must stay in the centre. 如果雄性要交配 它必须呆在中间 42 00:04:29,760 --> 00:04:33,240 And he won't be able to do that without a fight. 他不打一架是做不到的 43 00:04:52,400 --> 00:04:55,720 These battles are no-holds-barred 这些战斗是不可阻挡的 44 00:04:55,720 --> 00:04:57,440 and could even be fatal. 甚至可能是致命的 45 00:05:23,080 --> 00:05:25,520 The latecomer accepts defeat. 迟到者接受失败 46 00:05:28,440 --> 00:05:31,840 Not everyone can win in the mating game. 不是每个人都能在交配游戏中获胜 47 00:05:38,440 --> 00:05:43,040 So it's his rival who holds the centre of the pond 因此 他的对手占据了池塘的中心 48 00:05:43,040 --> 00:05:44,600 and gets the females. 然后得到雌性 49 00:05:47,720 --> 00:05:50,120 The pool will soon dry up. 游泳池很快就会干涸 50 00:05:50,120 --> 00:05:53,080 So for this year,at least, 因此 至少在今年 51 00:05:53,080 --> 00:05:55,360 he's missed his chance. 他错过了机会 52 00:06:00,880 --> 00:06:03,560 Patagonia. 巴塔哥尼亚 53 00:06:03,560 --> 00:06:05,240 On the high plateau, 在高原上, 54 00:06:05,240 --> 00:06:07,320 the spring thaw reveals 春天的解冻揭示了一切 55 00:06:07,320 --> 00:06:09,080 a land of lakes. 湖光山色 56 00:06:11,960 --> 00:06:14,560 The water here comes not from rains, 这里的水不是来自雨水 57 00:06:14,560 --> 00:06:16,800 but from melting snow and ice. 但是由于冰雪融化 58 00:06:19,240 --> 00:06:23,240 One of the rarest birds in the world travels long distances to get 世界上最稀有的鸟类之一 长途旅行以获取食物 59 00:06:23,240 --> 00:06:24,840 here and breed. 在这里繁殖 60 00:06:27,160 --> 00:06:32,040 A hooded grebe,one of just 700 that still survive. 一个戴着兜帽的格雷布 只有700人幸存 61 00:06:35,480 --> 00:06:39,680 This is a female,so she's extremely important if this species 这是一只雌性 所以如果这个物种 62 00:06:39,680 --> 00:06:41,320 is to survive. 是为了生存 63 00:06:45,560 --> 00:06:48,200 She doesn't fight to claim a mate. 她不会为了求偶而打架 64 00:06:49,760 --> 00:06:51,160 She dances. 她跳舞 65 00:06:53,720 --> 00:06:56,720 The most experienced males are the best dancers 最有经验的男性是最好的舞者 66 00:06:56,720 --> 00:06:59,520 because they've done all this before. 因为他们以前做过这一切 67 00:06:59,520 --> 00:07:03,160 So her challenge is to mate with one of them. 所以她的挑战是与其中一只交配 68 00:07:07,720 --> 00:07:08,880 To do that, 为此, 69 00:07:08,880 --> 00:07:12,200 she will have to prove that she too can dance. 她必须证明她也会跳舞 70 00:07:13,560 --> 00:07:16,560 Just getting noticed would be a start. 仅仅是引起注意就是一个开始 71 00:07:18,680 --> 00:07:21,200 Couples are pairing off all around, 情侣们在各处结对 72 00:07:21,200 --> 00:07:23,280 but her calls go unanswered. 但她的电话无人接听 73 00:07:27,920 --> 00:07:32,600 Two is company,and as perhaps she should have known, 第二个是同伴 也许她应该知道 74 00:07:32,600 --> 00:07:34,280 three is a crowd. 三是人群 75 00:07:37,200 --> 00:07:40,440 A solitary male must be a better possibility . 一个孤独的男性肯定是更好的选择 76 00:07:44,400 --> 00:07:46,440 but he's not keen either. 但他也不热心 77 00:07:51,560 --> 00:07:54,200 The lakes will freeze again before long, 湖水不久将再次结冰 78 00:07:54,200 --> 00:07:57,720 so an invitation to dance is a very welcome sign. 所以邀请跳舞是一个非常受欢迎的信号 79 00:08:04,200 --> 00:08:09,440 But a rival for his affections brings it to a swift end. 但是 一个争夺他的感情的对手很快就结束了这一切 80 00:08:11,920 --> 00:08:15,320 And just as she was getting started. 就在她刚开始的时候 81 00:08:15,320 --> 00:08:17,320 It's not going well. 事情进展不顺利 82 00:08:19,320 --> 00:08:21,320 And if she can't have him . 如果她不能得到他 83 00:08:26,560 --> 00:08:29,600 Perhaps finding a gift for him will help. 也许给他找个礼物会有帮助 84 00:08:32,400 --> 00:08:36,200 If she can find a partner,they will nest among the milfoil 如果她能找到一个伴侣 他们将在乳香中筑巢 85 00:08:36,200 --> 00:08:39,960 plants when its flowers appear on the water surface. 当它的花出现在水面上时的植物 86 00:08:43,680 --> 00:08:47,960 Presenting strands of it is part of the courtship ritual. 呈现这些片段是求爱仪式的一部分 87 00:08:47,960 --> 00:08:51,160 She just needs to find someone to give it to. 她只需要找个人给她 88 00:08:53,640 --> 00:08:56,480 His bending over backwards is perhaps a sign 他向后弯腰也许是个迹象 89 00:08:56,480 --> 00:08:58,360 that he is not interested. 他不感兴趣 90 00:09:09,080 --> 00:09:10,520 But who's this? 但这是谁？ 91 00:09:14,400 --> 00:09:18,320 Could he be the dance partner that she's been looking for? 他可能是她一直在寻找的舞伴吗？ 92 00:09:55,600 --> 00:09:58,320 The timing of her moves is crucial. 她的行动时机至关重要 93 00:10:00,840 --> 00:10:04,600 His precision shows that he's danced this routine before, 他的精准度表明他以前也跳过这种舞 94 00:10:04,600 --> 00:10:08,840 and more importantly,that he has already been a parent. 更重要的是 他已经是父母了 95 00:10:11,520 --> 00:10:13,120 It's looking good. 看起来不错 96 00:10:18,760 --> 00:10:21,800 Finally,having completed the performance, 最后,演出结束了, 97 00:10:21,800 --> 00:10:23,200 she seals their bond 她封了他们的关系 98 00:10:23,200 --> 00:10:25,160 with a strand of milfoil . 用一束牛奶纸 99 00:10:27,600 --> 00:10:31,160 a symbol of their commitment to the work ahead. 象征着他们对未来工作的承诺 100 00:10:32,280 --> 00:10:37,040 And one of hope for the survival of this most endangered of birds. 这是这种最濒危鸟类生存的希望之一 101 00:10:52,000 --> 00:10:54,680 Many species migrate to lakes 许多物种迁移到湖泊 102 00:10:54,680 --> 00:10:57,440 at a specific time in order to breed. 在特定的时间为了繁殖 103 00:10:59,000 --> 00:11:02,840 And for some,doing so comes at great cost. 对一些人来说 这样做的代价是巨大的 104 00:11:05,000 --> 00:11:11,120 This female sockeye salmon started from far out in the Pacific Ocean 这种雌性红眼鲑鱼起源于遥远的太平洋 105 00:11:11,120 --> 00:11:14,480 and then continued up one of Alaska's great rivers 然后沿着阿拉斯加的一条大河继续前行 106 00:11:14,480 --> 00:11:19,800 for a further 160 miles in order to reach Iliamna Lake. 再行驶160英里 才能到达伊利安纳湖 107 00:11:25,160 --> 00:11:27,920 Her arrival coincides with that of others. 她的到来与其他人的到来不谋而合 108 00:11:32,960 --> 00:11:34,360 Lots of them. 很多 109 00:11:40,600 --> 00:11:44,680 Every summer,over three and one half million sockeye come 每年夏天 都会有超过350万只袜子出现 110 00:11:44,680 --> 00:11:48,040 here.It's the largest salmon run in the world. 在这里这是世界上最大的鲑鱼养殖场 111 00:11:58,400 --> 00:12:01,680 When they entered fresh water,they stopped feeding, 当它们进入淡水时 它们停止进食 112 00:12:01,680 --> 00:12:06,240 so the bodies of the females now have room for developing eggs. 所以雌性动物的身体现在有发育卵子的空间 113 00:12:08,120 --> 00:12:11,480 But their energy is dwindling,and they have yet to reach 但是他们的能量正在减少 他们还没有达到目标 114 00:12:11,480 --> 00:12:15,440 the spawning grounds that lie upstream beyond the lake. 湖面上游的产卵场 115 00:12:19,400 --> 00:12:22,360 But now they face more immediate threats. 但现在他们面临更直接的威胁 116 00:12:52,640 --> 00:12:55,960 While they try desperately to evade the grizzly bears 当他们拼命躲避灰熊的时候 117 00:12:55,960 --> 00:13:00,200 that attack them from the lakeshore, 从湖边袭击他们 118 00:13:00,200 --> 00:13:02,880 another threat comes from deep water. 另一个威胁来自深水 119 00:13:12,400 --> 00:13:16,600 Iliamna Lake is home to freshwater seals. 伊利亚姆纳湖是淡水海豹的家园 120 00:13:33,280 --> 00:13:35,200 Despite these onslaughts, 尽管有这些攻击 121 00:13:35,200 --> 00:13:37,880 great numbers of the migrants survive 大量的移民幸存下来 122 00:13:37,880 --> 00:13:40,360 and swim on upstream,undeterred. 逆流而上 不受阻碍 123 00:13:42,320 --> 00:13:43,680 There are far more salmon 鲑鱼多得多 124 00:13:43,680 --> 00:13:45,320 than the predators can eat. 比捕食者能吃的还多 125 00:13:54,840 --> 00:13:58,280 At last,they reach the shallow streams. 最后 他们到达了浅溪 126 00:14:02,160 --> 00:14:05,920 So far on their journey,there has been safety in numbers. 到目前为止 在他们的旅程中 有很多人是安全的 127 00:14:09,480 --> 00:14:11,840 But now,at the spawning ground, 但是现在 在产卵场 128 00:14:11,840 --> 00:14:13,800 it's every fish for itself. 每一条鱼都是为了自己 129 00:14:22,760 --> 00:14:25,240 A female starts digging a nest 一只雌性开始挖巢 130 00:14:25,240 --> 00:14:28,120 and quickly attracts the attention of a male. 很快就吸引了男性的注意 131 00:14:35,160 --> 00:14:39,200 Quivering his fins is a male's version of a pick-up line. 抖动着鳍的是一条雄性版的钓线 132 00:14:51,480 --> 00:14:54,840 She has a mate for now,but with more fish 她现在有一个伴侣 但有更多的鱼 133 00:14:54,840 --> 00:14:56,640 continuing to arrive, 继续抵达, 134 00:14:56,640 --> 00:14:58,840 room for nests is running out. 巢的空间快用完了 135 00:15:07,360 --> 00:15:12,680 Rival females try to steal her mate,her nest or both. 雌性竞争对手试图偷走她的配偶 她的巢穴或两者兼而有之 136 00:15:12,680 --> 00:15:15,160 But she quickly sees them off. 但她很快就送走了他们 137 00:15:23,040 --> 00:15:25,760 Nests now cover the stream bed. 巢穴现在覆盖了河床 138 00:15:32,880 --> 00:15:34,600 She releases her eggs . 她释放她的蛋 139 00:15:36,600 --> 00:15:39,080 he fertilises them . 他给它们施肥 140 00:15:40,880 --> 00:15:42,560 and their work is done. 他们的工作完成了 141 00:15:45,440 --> 00:15:48,480 But she doesn't start on a return journey. 但她并没有开始返程 142 00:15:50,760 --> 00:15:53,320 This was always a one-way trip. 这总是一次单程旅行 143 00:16:02,000 --> 00:16:04,360 None of the salmon,male or female, 不管是公鲑鱼还是母鲑鱼 144 00:16:04,360 --> 00:16:06,880 has eaten since leaving the ocean . 离开海洋后就吃了 145 00:16:08,640 --> 00:16:12,400 and now their exhausted bodies begin to collapse. 现在他们疲惫的身体开始崩溃 146 00:16:14,240 --> 00:16:16,760 Pacific salmon only breed once 太平洋鲑鱼只繁殖一次 147 00:16:16,760 --> 00:16:20,320 in their lives,and having done so, 在他们的生活中 并且已经这样做了 148 00:16:20,320 --> 00:16:21,680 they die. 他们死了 149 00:16:27,720 --> 00:16:30,760 They seemed inexhaustible while being driven 他们在开车时似乎用之不竭 150 00:16:30,760 --> 00:16:32,600 by the urge to reproduce. 由于繁衍后代的冲动 151 00:16:39,800 --> 00:16:42,040 These have won the mating game. 它们赢得了交配游戏 152 00:16:45,320 --> 00:16:48,080 But it cost them their lives to do so. 但他们为此付出了生命代价 153 00:17:05,000 --> 00:17:07,200 Salmon from the Pacific migrate 太平洋鲑鱼迁徙 154 00:17:07,200 --> 00:17:09,160 in their search to find a safe place 他们在寻找一个安全的地方 155 00:17:09,160 --> 00:17:10,600 to lay their eggs. 产卵 156 00:17:12,240 --> 00:17:17,160 But when suitable sites for nests are particularly rare,competition 但当适合筑巢的地点特别稀少时 竞争就更加激烈了 157 00:17:17,160 --> 00:17:19,080 can get intense. 可能会变得紧张 158 00:17:22,480 --> 00:17:27,160 These are the Appalachian Mountains in the eastern United States. 这些是美国东部的阿巴拉契亚山脉 159 00:17:29,400 --> 00:17:33,080 Here,in just a very few rivers,live monsters 在这里 只有很少的几条河流 生活着怪物 160 00:17:33,080 --> 00:17:35,280 with a truly ancient ancestry. 有着真正古老的祖先 161 00:17:39,320 --> 00:17:41,520 Some call them snot otters . 有人称之为鼻水獭 162 00:17:42,840 --> 00:17:44,880 others mud devils. 其他的泥鬼 163 00:17:46,200 --> 00:17:49,880 Their most common name,however,is hellbender. 然而 他们最常见的名字是hellbender 164 00:17:49,880 --> 00:17:51,880 But common they are not. 但它们并不常见 165 00:17:54,240 --> 00:17:57,320 Hellbenders are very rare indeed. 地狱蛇确实非常罕见 166 00:17:59,640 --> 00:18:03,960 This male is very well camouflaged,and he rarely moves. 这只雄性动物伪装得很好 很少移动 167 00:18:06,240 --> 00:18:09,680 So in practice,he's almost invisible. 所以在实践中 他几乎是隐形的 168 00:18:13,760 --> 00:18:17,160 Hellbenders are a kind of giant salamander. 海蛇是一种大鲵 169 00:18:17,160 --> 00:18:20,680 He may grow up to 60 centimetres long. 他可以长到60厘米长 170 00:18:23,520 --> 00:18:25,760 They're usually very shy, 他们通常很害羞 171 00:18:25,760 --> 00:18:27,680 but during the few weeks each year 但是在每年的几个星期里 172 00:18:27,680 --> 00:18:31,120 when summer turns to autumn and the river starts to flow 当夏天转为秋天 河水开始流动 173 00:18:31,120 --> 00:18:35,720 more strongly,the hellbenders start to move around. 更强烈的是 地狱弯曲者开始四处移动 174 00:18:40,520 --> 00:18:43,120 He's looking for somewhere to nest - 他在找个地方安家- 175 00:18:43,120 --> 00:18:45,240 a rock,but not just any rock. 一块石头 但不仅仅是任何一块石头 176 00:18:48,440 --> 00:18:51,240 This particular slab he knows well. 他对这个特殊的板块很熟悉 177 00:18:51,240 --> 00:18:53,080 He's chosen it before. 他以前选过 178 00:18:55,200 --> 00:18:59,160 Such rare,heavier stones don't get easily washed away. 这种罕见、较重的石头不容易被冲走 179 00:19:02,160 --> 00:19:05,760 The space underneath it is well hidden and the current flowing 它下面的空间隐藏得很好 水流也在流动 180 00:19:05,760 --> 00:19:08,560 swiftly through it will bring the oxygen needed 迅速通过它将带来所需的氧气 181 00:19:08,560 --> 00:19:10,040 for developing eggs. 用于发育卵 182 00:19:16,680 --> 00:19:19,320 The females are already on the move, 雌性已经开始行动了 183 00:19:19,320 --> 00:19:21,880 battling their way upstream towards him. 他们奋力向上游冲去 184 00:19:26,480 --> 00:19:30,600 He just needs to hold on to his den until they get there. 他只需要抓住他的巢穴直到他们到达那里 185 00:19:35,560 --> 00:19:39,240 But every year other males arrive to challenge him. 但每年都有其他雄性来挑战他 186 00:19:44,600 --> 00:19:46,920 They come at him from all sides. 他们从四面八方向他袭来 187 00:19:52,200 --> 00:19:55,960 They're even lining up to try and take over his den. 他们甚至排着队试图接管他的巢穴 188 00:19:59,880 --> 00:20:04,280 But as he fights,the strong current carries him away from the den 但当他战斗的时候 强大的水流把他带离了巢穴 189 00:20:04,280 --> 00:20:06,600 and another rival sees a chance. 另一个对手看到了机会 190 00:20:16,520 --> 00:20:18,360 Back in the nick of time. 在关键时刻回来 191 00:20:27,080 --> 00:20:28,120 Exhausting. 使人精疲力竭的 192 00:20:29,120 --> 00:20:32,720 But this is the time when he has to secure a mate. 但这是他必须找到配偶的时候 193 00:20:38,160 --> 00:20:42,320 With temperatures dropping,the turbulent winter water becomes 随着温度的下降 冬季湍急的水流变得越来越大 194 00:20:42,320 --> 00:20:45,440 rich in oxygen needed by developing eggs. 富含卵子发育所需的氧气 195 00:20:48,360 --> 00:20:51,440 These days,increasing erosion of the land 这些天来 土地的侵蚀越来越严重 196 00:20:51,440 --> 00:20:54,760 is blocking hellbender dens with sediment. 正在用沉积物堵塞海尔本德巢穴 197 00:20:54,760 --> 00:20:58,560 So now this one,more than ever,is worth fighting for. 因此 现在这一点比以往任何时候都更值得为之奋斗 198 00:21:21,080 --> 00:21:23,480 He's been forced out of his home. 他被迫离开了家 199 00:21:25,880 --> 00:21:29,680 But after all he's been through,he's not about to concede. 但在他经历了这么多之后 他不会让步的 200 00:21:41,280 --> 00:21:42,680 His rival gives up. 他的对手放弃了 201 00:21:46,360 --> 00:21:48,160 He is still the boss. 他仍然是老板 202 00:21:57,240 --> 00:22:00,680 And now,at last,a welcome visitor. 现在 终于有了一位受欢迎的客人 203 00:22:04,160 --> 00:22:07,760 He greets her with what is known to hellbender watchers 他用海尔本德观察者所知道的话问候她 204 00:22:07,760 --> 00:22:10,800 as a courtship kiss. 作为求爱之吻 205 00:22:10,800 --> 00:22:13,200 Her belly is full of eggs 她的肚子里装满了鸡蛋 206 00:22:13,200 --> 00:22:15,400 and she slips in beside him. 她溜到他身边 207 00:22:20,320 --> 00:22:25,400 Then strangely,after days of brawling, 奇怪的是 经过几天的争吵 208 00:22:25,400 --> 00:22:28,800 rival males are also allowed to enter. 竞争对手的男性也被允许进入 209 00:22:33,600 --> 00:22:37,120 Perhaps he's now too exhausted to fight 也许他现在太累了 无法战斗 210 00:22:37,120 --> 00:22:39,920 or has some strategy we don't know about. 或者有一些我们不知道的策略 211 00:22:44,840 --> 00:22:48,520 Other females then visit the den and add their eggs 其他的雌性随后会去巢穴并添加它们的卵 212 00:22:48,520 --> 00:22:52,200 to the communal clutch,which he will protect. 他会保护的公共离合器 213 00:22:55,000 --> 00:22:59,560 He has become a baby-sitter for the whole hellbender community. 他成了整个hellbender社区的保姆 214 00:23:02,120 --> 00:23:07,200 In the freshwater world,it's often the males who look after the young. 在淡水世界里 通常是雄性照顾幼仔 215 00:23:10,320 --> 00:23:13,760 But even when these duties are left to one parent, 但即使这些责任留给了一位家长 216 00:23:13,760 --> 00:23:18,000 the mating game may still demand carefully timed coordination. 交配游戏可能仍然需要谨慎的时间协调 217 00:23:25,600 --> 00:23:29,880 In South America,water levels across the Amazon basin rise 在南美洲 亚马逊河流域的水位上升 218 00:23:29,880 --> 00:23:32,280 and fall with the seasonal rains. 随着季节性降雨而下降 219 00:23:38,640 --> 00:23:42,680 If this male splash tetra is going to mate successfully, 如果这只雄性四联体能够成功交配 220 00:23:42,680 --> 00:23:45,080 he needs the water level to rise. 他需要水位上升 221 00:23:47,560 --> 00:23:49,920 It's low at the moment, 现在很低 222 00:23:49,920 --> 00:23:54,040 but every drop of rain brings it closer to his requirements. 但每一滴雨都使它更接近他的要求 223 00:24:09,800 --> 00:24:15,040 As the rain begins to ease,he tries to find out if he's high enough yet. 雨开始缓了 他想看看自己是否够高了 224 00:24:25,680 --> 00:24:30,160 A few well-aimed splashes help him to estimate the distance. 几次瞄准良好的水花帮助他估计距离 225 00:24:36,640 --> 00:24:39,400 He's looking for a place 他在找一个地方 226 00:24:39,400 --> 00:24:41,960 where a female can lay her eggs away from predators. 雌性可以在远离捕食者的地方产卵 227 00:24:45,960 --> 00:24:48,640 But to assess the situation properly, 但要正确评估形势, 228 00:24:48,640 --> 00:24:51,680 he does something truly extraordinary. 他做了一件非常了不起的事 229 00:25:03,760 --> 00:25:06,480 The water he splashes on to the leaf 他溅到叶子上的水 230 00:25:06,480 --> 00:25:10,240 momentarily delays his fall back into the river. 一时间 他又回到了河里 231 00:25:15,000 --> 00:25:17,800 Now he turns his attention to a female. 现在他把注意力转向一位女性 232 00:25:21,320 --> 00:25:24,680 Because what comes next needs the two of them. 因为接下来的事情需要他们两个 233 00:25:33,760 --> 00:25:35,840 If they're to mate successfully, 如果它们要成功交配 234 00:25:35,840 --> 00:25:38,480 they must hit the leaf simultaneously. 它们必须同时击中树叶 235 00:26:01,600 --> 00:26:06,720 After she's laid her eggs,he spreads his jaw and fins 她下蛋后 他张开下巴和鳍 236 00:26:06,720 --> 00:26:10,760 to help him cling on just long enough to fertilise them. 帮助他坚持足够长的时间让它们受精 237 00:26:27,080 --> 00:26:30,840 This extraordinary way of laying keeps the eggs safe 这种特殊的产卵方式保证了鸡蛋的安全 238 00:26:30,840 --> 00:26:33,640 from underwater predators. 来自水下捕食者 239 00:26:33,640 --> 00:26:37,040 But for him,it creates one final challenge. 但对他来说 这带来了最后一个挑战 240 00:26:40,200 --> 00:26:44,000 Out of the water,the eggs are in danger of drying out. 离开水 鸡蛋有干涸的危险 241 00:26:47,840 --> 00:26:49,280 Problem solved. 问题解决了 242 00:26:51,560 --> 00:26:55,480 With the female gone,he alone takes the responsibility 随着女性的离去 他独自承担责任 243 00:26:55,480 --> 00:26:59,040 for ensuring their eggs will stay wet 确保他们的蛋保持湿润 244 00:26:59,040 --> 00:27:01,560 until they hatch in a few days' time. 直到它们在几天后孵化 245 00:27:04,360 --> 00:27:08,760 The splash tetra pair had to synchronise their moves, splash tetra双人必须同步动作 246 00:27:08,760 --> 00:27:13,560 but in other cases,the mating game requires thousands of individuals 但在其他情况下 交配游戏需要成千上万的个体 247 00:27:13,560 --> 00:27:15,200 to work in harmony. 和谐地工作 248 00:27:17,520 --> 00:27:20,160 In the Great Rift Valley of East Africa, 在东非大裂谷 249 00:27:20,160 --> 00:27:24,000 fractures in the Earth's crust have been filled with fresh water 地壳的裂缝中充满了淡水 250 00:27:24,000 --> 00:27:27,120 over millions of years by the annual rains. 数百万年来每年的降雨 251 00:27:29,720 --> 00:27:31,760 But in many of these lakes, 但在许多湖泊中 252 00:27:31,760 --> 00:27:33,840 the water doesn't stay fresh for long. 水不能长时间保持新鲜 253 00:27:36,360 --> 00:27:39,760 Scalding volcanic waters from deep below ground 地下深处滚烫的火山水 254 00:27:39,760 --> 00:27:43,080 carry up salts dissolved from the rocks. 把从岩石中溶解的盐带上来 255 00:27:46,000 --> 00:27:50,120 Not much is able to live in these caustic lakes. 在这些腐蚀性的湖泊中 没有多少人能够生存 256 00:27:50,120 --> 00:27:52,760 But one kind of bird flocks to them. 但有一种鸟成群结队地向它们飞去 257 00:27:57,120 --> 00:28:00,360 Lesser flamingos gather here in millions 小火烈鸟以百万计聚集在这里 258 00:28:00,360 --> 00:28:03,360 to feed on the microscopic algae that develop 以发育的微藻为食 259 00:28:03,360 --> 00:28:05,640 in these super salty waters. 在这些超咸的水里 260 00:28:34,040 --> 00:28:38,840 A male flamingo must be well-fed before he can mate. 雄火烈鸟在交配前必须吃饱 261 00:28:42,560 --> 00:28:45,960 And the algae and other microorganisms that flourish 还有藻类和其他微生物 262 00:28:45,960 --> 00:28:51,040 in these briny waters are the only things that lesser flamingos eat. 在这些咸水中 小火烈鸟只能吃东西 263 00:28:57,600 --> 00:29:01,320 But these organisms also contain toxins. 但这些生物体也含有毒素 264 00:29:03,080 --> 00:29:05,920 The birds do not digest these substances, 鸟类不消化这些物质 265 00:29:05,920 --> 00:29:08,960 but store them in their plumage out of harm's way. 但要把它们放在羽毛里 以免受到伤害 266 00:29:08,960 --> 00:29:11,720 And it's these that turns them pink. 正是这些使它们变成粉红色 267 00:29:13,200 --> 00:29:17,120 The more well-fed he is,the rosier he becomes 他吃得越饱 身体就越健康 268 00:29:17,120 --> 00:29:20,240 and the more attractive he is to his potential mate. 他对他的潜在伴侣越有吸引力 269 00:29:28,040 --> 00:29:29,840 As the water gets deeper, 随着水越来越深 270 00:29:29,840 --> 00:29:33,240 the flamingos have to find new ways to collect their food. 火烈鸟必须找到收集食物的新方法 271 00:29:50,840 --> 00:29:53,880 He's getting pinker with every mouthful. 他每吃一口都会发红 272 00:29:57,640 --> 00:30:00,160 There is a female out there for him, 有一个女人在等他 273 00:30:00,160 --> 00:30:04,240 but he can only find her when she and all his friends in the flock 但他只有在她和他所有的朋友在羊群里时才能找到她 274 00:30:04,240 --> 00:30:07,560 are pink enough to begin their courtship dance. 他们的粉红色足以开始他们的求爱之舞 275 00:30:13,240 --> 00:30:17,880 Each morning,the birds gather around the hot springs to drink 每天早上 鸟儿们聚集在温泉边喝水 276 00:30:17,880 --> 00:30:21,120 and show off their newly pink feathers. 炫耀他们新的粉红色羽毛 277 00:30:21,120 --> 00:30:24,440 It's a chance to see who is ready for dancing. 这是一个看谁准备好跳舞的机会 278 00:30:27,960 --> 00:30:30,160 With his plumage in proper order, 他的羽毛排列整齐 279 00:30:30,160 --> 00:30:34,200 he's keen to get the party started and show off to a female. 他渴望派对开始 并向一位女性炫耀 280 00:30:41,920 --> 00:30:45,600 After weeks of feeding,with the whole flock in full colour, 经过数周的喂养 整只羊的颜色都变了 281 00:30:45,600 --> 00:30:50,160 it seems that everyone is finally in the mood. 看来大家终于有心情了 282 00:30:59,160 --> 00:31:02,320 Dance fever spreads throughout the flock. 舞蹈热在羊群中蔓延 283 00:31:03,840 --> 00:31:07,200 And,at last,the performance begins. 最后 演出开始了 284 00:31:12,000 --> 00:31:14,760 Both males and females are dancing. 男人和女人都在跳舞 285 00:31:19,600 --> 00:31:22,800 Groups merge and co-ordinate their courtship. 团体合并并协调他们的求爱 286 00:31:33,600 --> 00:31:36,400 Laying their eggs at exactly the same time 在同一时间下蛋 287 00:31:36,400 --> 00:31:39,720 maximises their chicks' chance of survival, 最大限度地提高雏鸟的生存机会 288 00:31:39,720 --> 00:31:41,800 and dancing together ensures 一起跳舞可以保证 289 00:31:41,800 --> 00:31:44,240 that they're all in sync with one another. 它们都是同步的 290 00:31:51,080 --> 00:31:53,880 If two birds find what they're looking for, 如果两只鸟找到了他们要找的东西 291 00:31:53,880 --> 00:31:56,080 they leave the dancing group. 他们离开了舞蹈团 292 00:31:58,120 --> 00:32:02,360 Exactly how a partner is chosen,we don't fully understand. 我们并不完全了解合作伙伴是如何选择的 293 00:32:03,560 --> 00:32:07,400 But it seems that some flamingos try to select a partner 但似乎有些火烈鸟试图选择伴侣 294 00:32:07,400 --> 00:32:11,200 with the same shade of pink as themselves, 和他们一样的粉红色 295 00:32:11,200 --> 00:32:14,160 though how they judge that is still a mystery. 尽管他们如何判断这仍然是个谜 296 00:32:35,280 --> 00:32:38,880 Lesser flamingos may have to wait many years 小火烈鸟可能要等很多年 297 00:32:38,880 --> 00:32:43,120 before the water conditions are right to enable them to mate. 在水条件适合它们交配之前 298 00:32:45,360 --> 00:32:48,640 But there are lakes where securing a mate 但也有湖泊可以保护配偶 299 00:32:48,640 --> 00:32:51,680 can be a year-round preoccupation. 可能是一个全年的职业 300 00:32:54,680 --> 00:32:59,360 Lake Tanganyika in East Africa is enormous, 东非的坦噶尼喀湖很大 301 00:32:59,360 --> 00:33:02,240 deep and warm. 又深又暖 302 00:33:02,240 --> 00:33:05,120 And it's been this way for millions of years. 数百万年来一直如此 303 00:33:07,160 --> 00:33:11,480 Long-term stability allows long-term mating strategies. 长期稳定性允许长期的交配策略 304 00:33:12,960 --> 00:33:17,040 This pile of shells,for example,is constantly getting bigger. 例如 这堆炮弹不断变大 305 00:33:19,520 --> 00:33:22,280 It's likely to be several decades old. 它可能有几十年的历史了 306 00:33:23,480 --> 00:33:27,280 It's certainly older than the current ruler, 它肯定比现在的统治者更古老 307 00:33:27,280 --> 00:33:29,440 a male callipterus fish. 一种雄鱼 308 00:33:36,320 --> 00:33:38,840 He is an underwater architect 他是一名水下建筑师 309 00:33:38,840 --> 00:33:42,680 and busy collecting empty snail shells to add to his castle. 忙着收集空蜗牛壳 为他的城堡添砖加瓦 310 00:33:56,640 --> 00:34:00,240 His pile is home to over 20 females, 他那一堆是20多名女性的家 311 00:34:00,240 --> 00:34:02,640 who lay their eggs inside the shells. 他们在贝壳里下蛋 312 00:34:07,680 --> 00:34:11,360 He does his best to ensure that they only mate with him. 他尽最大努力确保它们只与他交配 313 00:34:12,960 --> 00:34:15,280 And doing so is a full-time job. 这样做是一项全职工作 314 00:34:27,040 --> 00:34:29,640 There are eels here 这里有鳗鱼 315 00:34:29,640 --> 00:34:32,880 that would happily make a meal of a shell full of eggs. 那会使一个装满鸡蛋的贝壳成为一顿美餐 316 00:34:39,160 --> 00:34:41,680 But not if the king can prevent it. 但如果国王能阻止的话就不行了 317 00:34:59,960 --> 00:35:03,600 He stole this castle of shells from a previous owner. 他从以前的主人那里偷了这座贝壳城堡 318 00:35:05,360 --> 00:35:07,720 And if he lets his guard down, 如果他放松警惕 319 00:35:07,720 --> 00:35:10,480 someone will certainly take it from him. 肯定会有人从他那里拿走的 320 00:35:22,320 --> 00:35:26,440 Gangs of marauding bachelors are a constant nuisance. 成群结队的抢劫单身汉总是令人讨厌 321 00:35:34,320 --> 00:35:37,400 And while the king of the shell castle is busy 当贝壳城堡的国王忙的时候 322 00:35:37,400 --> 00:35:39,080 proving how tough he is . 证明他有多坚强 323 00:35:40,400 --> 00:35:42,600 he's being watched by a sneak. 他被一个偷窥者监视着 324 00:35:46,400 --> 00:35:50,280 He belongs to the same species,but he's a dwarf. 他属于同一物种 但他是个侏儒 325 00:35:51,960 --> 00:35:54,800 He won't grow any bigger and he's ready to mate. 他不会长得更大 他已经准备好交配了 326 00:35:56,000 --> 00:35:59,240 He just needs to get near enough to a female. 他只需要靠近一个女人 327 00:36:01,000 --> 00:36:05,080 He is only one 50th of the weight of the king 他只是国王体重的50分之一 328 00:36:05,080 --> 00:36:08,880 and if he can reach a shell with a female inside, 如果他能够到一个里面有雌性的贝壳 329 00:36:08,880 --> 00:36:12,560 he's small enough to slip inside and mate with her. 他小到可以溜进去和她交配 330 00:36:23,040 --> 00:36:24,280 Busted. 破产了 331 00:36:26,240 --> 00:36:27,760 Back to square one. 回到原点 332 00:36:33,480 --> 00:36:37,640 Every now and then,the king has to tackle someone his own size. 国王时不时地要对付和他一样大小的人 333 00:36:40,120 --> 00:36:43,800 A serious contender is attempting to overthrow him. 一位严肃的竞争者正试图推翻他 334 00:36:45,160 --> 00:36:47,360 Could this be a chance for the dwarf? 这是侏儒的机会吗？ 335 00:37:01,600 --> 00:37:02,840 He's close. 他很接近 336 00:37:09,040 --> 00:37:12,480 Once inside with the female,he can fertilise her eggs 一旦进入雌性体内 他就可以让雌性受精 337 00:37:12,480 --> 00:37:15,680 without the king ever knowing that he's been there. 国王不知道他去过那里 338 00:37:21,440 --> 00:37:23,520 He might not be the biggest fish, 他可能不是最大的鱼 339 00:37:23,520 --> 00:37:28,000 but he's definitely got one of the cheekiest strategies in the lake. 但他肯定有湖里最厚颜无耻的策略之一 340 00:37:30,280 --> 00:37:34,320 These shenanigans continue month after month, 这些骗局一个月接一个月地继续着 341 00:37:34,320 --> 00:37:38,040 thanks to the lake's extremely stable environment. 多亏了这个湖极其稳定的环境 342 00:37:41,320 --> 00:37:45,720 But some environments in southern Africa are far from stable. 但南部非洲的一些环境远不稳定 343 00:37:48,200 --> 00:37:52,320 The grassy plains in Zambia change radically every year. 赞比亚的草原每年都在急剧变化 344 00:37:54,800 --> 00:37:56,200 They flood. 洪水泛滥 345 00:37:59,360 --> 00:38:03,880 Many are home to lechwe,one of the most aquatic of antelopes. 许多是莱克韦的家 莱克韦是最水生的羚羊之一 346 00:38:09,040 --> 00:38:13,400 With hooves that splay out wide and extra-strong hind legs, 马蹄张开 后腿特别结实 347 00:38:13,400 --> 00:38:17,680 this female is able to travel across even deep swamps. 这只雌性甚至可以穿越很深的沼泽 348 00:38:21,600 --> 00:38:25,040 But their watery world is now shrinking. 但他们的水世界正在缩小 349 00:38:25,040 --> 00:38:27,040 It hasn't rained in months. 好几个月没下雨了 350 00:38:29,400 --> 00:38:34,840 Before long,these swamp meadows on which the lechwe depend will be dry. 不久 莱赫赖以生存的沼泽草地将干涸 351 00:38:37,680 --> 00:38:41,200 They turn into dusty plains with just a few 它们变成了尘土飞扬的平原 只剩下几片土地 352 00:38:41,200 --> 00:38:42,960 small,muddy water holes. 泥泞的小水坑 353 00:38:49,160 --> 00:38:52,760 This is the best time for a female to find a mate. 这是女性寻找伴侣的最佳时机 354 00:38:57,120 --> 00:38:58,640 In a few months' time, 再过几个月, 355 00:38:58,640 --> 00:39:01,960 when her young are born,things will be easier. 当她的孩子出生时 事情会变得容易些 356 00:39:03,240 --> 00:39:06,280 So it's at this point that she starts to think 就在这一点上 她开始思考 357 00:39:06,280 --> 00:39:07,760 about getting a partner. 关于找个搭档 358 00:39:12,520 --> 00:39:17,320 Most of the time,male and female lechwe live quite separate lives. 大多数时候 男女勒赫我们过着完全不同的生活 359 00:39:21,480 --> 00:39:24,320 She is now at her most fertile, 她现在正处于生育能力最强的时期 360 00:39:24,320 --> 00:39:28,200 and she starts to leave the safety of the female herd. 她开始离开母牛群的安全地带 361 00:39:31,400 --> 00:39:34,280 Alone,she's more vulnerable, 独自一人 她更脆弱 362 00:39:34,280 --> 00:39:36,640 and the long,dry grass away 还有那长长的干草 363 00:39:36,640 --> 00:39:40,280 from the swamp can only too easily conceal a lion. 从沼泽里躲起来的狮子太容易了 364 00:39:44,880 --> 00:39:48,560 She mustn't stay away from the other females for long. 她不能长时间离开其他雌性动物 365 00:39:54,080 --> 00:39:57,400 To survive here,you must be fit and strong, 要想在这里生存 你必须健康强壮 366 00:39:57,400 --> 00:40:00,560 and those are exactly the characteristics 而这些正是它们的特点 367 00:40:00,560 --> 00:40:02,120 she values in a mate. 她重视配偶 368 00:40:04,640 --> 00:40:08,960 The best place to find a male with such qualities is even further 找到具有这种品质的男性最好的地方是更远的地方 369 00:40:08,960 --> 00:40:10,440 away from the water. 远离水 370 00:40:13,040 --> 00:40:16,120 Out here on the dry plains,the males are already 在干燥的平原上 雄性已经 371 00:40:16,120 --> 00:40:17,720 competing for females. 争夺女性 372 00:40:26,560 --> 00:40:29,880 Stabbing the ground with his horns is a male's way 用角刺地是雄性的方式 373 00:40:29,880 --> 00:40:32,080 of demonstrating his strength. 展示他的力量 374 00:40:40,760 --> 00:40:42,880 His next move is more direct. 他的下一步行动更直接 375 00:40:58,560 --> 00:41:00,480 She remains unconvinced, 她仍然不相信 376 00:41:00,480 --> 00:41:02,840 but this performance has caught 但这场演出吸引了观众 377 00:41:02,840 --> 00:41:05,000 the attention of a rival male. 竞争对手的注意 378 00:41:15,800 --> 00:41:18,360 She's here to mate with the strongest male, 她是来和最强壮的雄性交配的 379 00:41:18,360 --> 00:41:22,480 and these battles will help her decide which one that is. 这些战斗将帮助她决定到底是哪一个 380 00:41:29,080 --> 00:41:30,920 But they'd better get a move on. 但他们最好快点 381 00:41:30,920 --> 00:41:33,840 There are plenty of other males that she could choose. 她可以选择很多其他的男性 382 00:41:45,320 --> 00:41:47,280 Having seen off his rival, 送走了他的对手 383 00:41:47,280 --> 00:41:49,560 he resumes his overtures to her. 他继续向她求婚 384 00:41:57,800 --> 00:42:01,440 Perhaps because they're vulnerable when they get together,their union 也许是因为他们在一起时很脆弱 他们的联盟 385 00:42:01,440 --> 00:42:03,200 is very brief. 它非常简短 386 00:42:07,920 --> 00:42:12,400 Afterwards,he tries to remain close,but she has other ideas. 之后 他试图保持亲密 但她有其他想法 387 00:42:17,320 --> 00:42:20,360 Her instinct is to seek safety in numbers. 她的本能是在数量上寻求安全 388 00:42:22,400 --> 00:42:25,160 She's got what she came for and she heads back 她得到了她想要的东西 她回来了 389 00:42:25,160 --> 00:42:27,040 to the female herd. 给母牛群 390 00:42:31,720 --> 00:42:35,040 She's started her pregnancy at just the right time 她怀孕的时机正合适 391 00:42:35,040 --> 00:42:39,440 to give her offspring,when it arrives,the best start in life. 给她的后代 当它到来时 生命中最好的开始 392 00:42:45,640 --> 00:42:50,520 In Brazil,this wetland,the Pantanal,also dries out every 在巴西 潘塔纳尔湿地每年都会干涸 393 00:42:50,520 --> 00:42:53,920 year,and this is the time when, 一年 这是 394 00:42:53,920 --> 00:42:56,120 like the lechwe,caiman breed. 像莱克韦人一样 凯门鳄也有繁殖能力 395 00:43:00,360 --> 00:43:04,840 But if he is to survive long enough to mate,this male will have to find 但如果他要存活足够长的时间来交配 这只雄性就必须找到 396 00:43:04,840 --> 00:43:06,240 water of some kind. 某种水 397 00:43:08,360 --> 00:43:11,880 The pool he came from has now dried up. 他来自的池塘现在已经干涸了 398 00:43:11,880 --> 00:43:14,920 If he doesn't find a new one,he will die. 如果他找不到新的 他会死的 399 00:43:19,760 --> 00:43:23,160 The land is littered with the remains of those who didn't reach 这片土地上到处都是未到达的人的遗骸 400 00:43:23,160 --> 00:43:24,640 water in time. 及时浇水 401 00:43:32,200 --> 00:43:34,560 But he is heading for one place 但他要去一个地方 402 00:43:34,560 --> 00:43:36,600 where he knows that water 他在哪里知道水 403 00:43:36,600 --> 00:43:39,360 will remain throughout the dry season. 将在整个旱季保持 404 00:43:47,720 --> 00:43:49,080 He's made it. 他成功了 405 00:43:56,720 --> 00:43:59,440 And he is not the only one to have done so. 他不是唯一一个这样做的人 406 00:44:04,920 --> 00:44:07,240 So have thousands of others. 成千上万的人也是如此 407 00:44:16,680 --> 00:44:19,280 And it's not only water that's here. 这里不仅有水 408 00:44:21,080 --> 00:44:22,920 There are females as well. 也有女性 409 00:44:37,360 --> 00:44:40,040 Late afternoon is a time to bask. 傍晚是晒太阳的时候 410 00:44:49,200 --> 00:44:51,640 And although the dwindling pool 尽管游泳池越来越小 411 00:44:51,640 --> 00:44:54,280 is now very crowded,they tolerate 现在非常拥挤 他们可以忍受 412 00:44:54,280 --> 00:44:56,320 each other . 彼此 413 00:44:56,320 --> 00:44:58,400 for the time being. 暂时 414 00:45:10,400 --> 00:45:12,800 But by first light, 但一亮 415 00:45:12,800 --> 00:45:14,560 the mood has changed. 心情变了 416 00:45:16,720 --> 00:45:20,480 Surviving the drought is no longer a male's top priority. 在干旱中生存不再是男性的首要任务 417 00:45:21,960 --> 00:45:25,960 If babies are to hatch out when the high water returns and life 如果婴儿要在高水位回归时孵化出来 生命 418 00:45:25,960 --> 00:45:29,240 is easier,he needs to mate soon. 更容易 他需要尽快交配 419 00:45:31,200 --> 00:45:34,560 And if he's to do that,he must claim a patch of this water 如果他要这么做 他必须要一小块水 420 00:45:34,560 --> 00:45:35,800 as his own . 作为他自己的 421 00:45:37,200 --> 00:45:39,880 because there isn't room for everyone. 因为没有空间容纳所有人 422 00:45:47,600 --> 00:45:52,440 All around,males begin to assert their dominance. 在所有地方 男性开始维护自己的统治地位 423 00:46:01,240 --> 00:46:03,680 The newcomer must stand his ground 新来的人必须坚持自己的立场 424 00:46:03,680 --> 00:46:06,040 if he wants to remain a contender. 如果他想继续成为竞争者 425 00:46:09,480 --> 00:46:12,480 But he must also know when to back down. 但他也必须知道什么时候该放弃 426 00:46:14,480 --> 00:46:16,600 And there is usually someone 通常会有人 427 00:46:16,600 --> 00:46:18,560 smaller for him to pick on. 小一点让他挑 428 00:46:28,960 --> 00:46:32,800 By mid-morning,an uneasy calm descends. 到了中午 一种不安的平静降临 429 00:46:36,840 --> 00:46:39,560 The newcomer has secured a patch. 新来的人得到了一块补丁 430 00:46:41,920 --> 00:46:46,160 But he still has to convince a female that he's worth mating with. 但他仍然需要说服一只雌性动物 让它相信自己值得与之交配 431 00:46:50,160 --> 00:46:52,600 And he has a plan. 他有一个计划 432 00:46:54,360 --> 00:46:56,960 It starts with a grunt. 它以咕噜声开始 433 00:47:00,280 --> 00:47:05,320 The next part of his courtship song,we can't hear,but we can see it. 他的求爱歌曲的下一部分 我们听不到 但我们可以看到 434 00:47:30,840 --> 00:47:34,560 It is not the muscular movement of his body that make 并不是他身体的肌肉运动造成的 435 00:47:34,560 --> 00:47:35,920 the water dance, 水上舞蹈 436 00:47:35,920 --> 00:47:38,360 but the low frequency of his call. 但是他打电话的频率很低 437 00:47:43,960 --> 00:47:46,880 This song contest may be inaudible 这场歌曲比赛可能听不见 438 00:47:46,880 --> 00:47:49,560 to us,but not to female caiman. 对我们来说 但不是对女性凯门鳄 439 00:47:58,920 --> 00:48:01,680 It attracts them from far and wide. 它从四面八方吸引着他们 440 00:48:22,480 --> 00:48:25,480 Despite his rival's best efforts, 尽管他的对手竭尽全力 441 00:48:25,480 --> 00:48:28,120 it is the newcomer who seems 似乎是新来的人 442 00:48:28,120 --> 00:48:30,680 to be getting it right, 为了把事情做好 443 00:48:30,680 --> 00:48:33,800 because he's got company. 因为他有客人 444 00:48:38,480 --> 00:48:40,840 The water is so murky that actual 水是如此的浑浊以至于 445 00:48:40,840 --> 00:48:42,760 mating is rarely visible . 交配很少可见 446 00:48:44,320 --> 00:48:47,760 but every now and then two caiman appear a little more interested 但偶尔会有两个凯门鳄显得更感兴趣 447 00:48:47,760 --> 00:48:49,480 in one another, 相互之间, 448 00:48:49,480 --> 00:48:53,200 and something is clearly going on below the surface. 很明显 地下正在发生一些事情 449 00:49:05,160 --> 00:49:07,560 Timing is crucial . 时间是至关重要的 450 00:49:09,560 --> 00:49:12,240 as it is for all animals that come 就像所有来的动物一样 451 00:49:12,240 --> 00:49:14,960 to breed in those variable and only 在那些变化无常的 452 00:49:14,960 --> 00:49:18,960 too unpredictable of the Earth's environments, 地球环境太不可预测 453 00:49:18,960 --> 00:49:20,800 its fresh waters. 它的淡水 454 00:49:39,960 --> 00:49:44,080 In order to tell the story of the breeding migration of red salmon, 为了讲述红鲑鱼繁殖迁徙的故事 455 00:49:44,080 --> 00:49:47,440 the Mating Game team had to choose the best location. 交配队必须选择最佳位置 456 00:49:50,480 --> 00:49:55,440 After months of research,assistant producer Olly Scholey struck gold. 经过数月的研究 助理制片人奥利·斯科利（Olly Scholey）获得了金牌 457 00:49:56,600 --> 00:49:59,560 So the reason we've come on this shoot really stems back to me 所以我们来拍这部电影的原因真的要追溯到我 458 00:49:59,560 --> 00:50:01,720 just sitting on Instagram on a Sunday evening 周日晚上坐在Instagram上 459 00:50:01,720 --> 00:50:05,840 and just scrolling through pictures,and I saw this one photo 只是滚动浏览图片 我看到了这张照片 460 00:50:05,840 --> 00:50:10,520 of Iliamna Lake that Jason had taken and was just completely sold on 杰森占领的伊利安纳湖 被完全出卖了 461 00:50:10,520 --> 00:50:12,760 coming here to film red salmon. 来这里拍摄红鲑鱼 462 00:50:12,760 --> 00:50:15,920 There's gin-clear water,and you can just immediately see 有杜松子酒清水 你可以马上看到 463 00:50:15,920 --> 00:50:19,160 in that picture that there's a really fascinating spawning dynamic 在这张照片中 有一个非常迷人的产卵动态 464 00:50:19,160 --> 00:50:20,520 going on here. 这是怎么回事 465 00:50:21,760 --> 00:50:24,880 Jason Ching is a local salmon biologist 詹森·程是当地的鲑鱼生物学家 466 00:50:24,880 --> 00:50:27,880 and world-renowned wildlife photographer. 和世界著名的野生动物摄影师 467 00:50:27,880 --> 00:50:32,920 He has taken the crew to the exact location where he took his picture. 他已经把船员带到他拍照的确切地点 468 00:50:37,160 --> 00:50:41,240 Cinematographer David Reichert is hoping to film the details 摄影师大卫·赖切特希望拍摄这些细节 469 00:50:41,240 --> 00:50:43,600 of the salmon courtship as never before. 从未有过的鲑鱼求爱 470 00:50:45,520 --> 00:50:49,160 Filming underwater,one of the big struggles is the visibility, 在水下拍摄 最大的困难之一是能见度 471 00:50:49,160 --> 00:50:51,400 being able to see a nice,sharp image. 能够看到一个漂亮、清晰的图像 472 00:50:51,400 --> 00:50:55,440 So when I saw the picture from here,that was really exciting for me. 所以当我看到这张照片时 我真的很兴奋 473 00:50:55,440 --> 00:50:58,800 To be able to work in that kind of water is .You know 能在那样的水里工作是 你知道的 474 00:50:58,800 --> 00:51:02,160 you're going to be bringing home really beautiful stuff. 你会带回家非常漂亮的东西 475 00:51:02,160 --> 00:51:06,320 The crew also want to capture the spectacle of this huge salmon run 船员们还想捕捉这次大马哈鱼出没的奇观 476 00:51:06,320 --> 00:51:07,520 from the air . 从空中 477 00:51:09,360 --> 00:51:11,880 .and this aerial perspective shows them 这张空中透视图显示了它们 478 00:51:11,880 --> 00:51:14,240 something completely unexpected. 完全出乎意料的事情 479 00:51:15,320 --> 00:51:17,760 Just keep it down.Yeah,you've got control. 小声点 是的 你有控制权 480 00:51:18,840 --> 00:51:21,960 Hang on,hold up.There's a seal,bottom left. 等等 等等 左下角有一只海豹 481 00:51:21,960 --> 00:51:24,560 OK,I'm moving forward. 好的 我继续前进 482 00:51:24,560 --> 00:51:29,760 Freshwater seals,an incredibly rare animal,were predating 淡水海豹是一种极其罕见的动物 它的捕食对象是 483 00:51:29,760 --> 00:51:33,200 upon the salmon as they kind of bunched up in this river mouth. 当鲑鱼在这个河口聚集的时候 484 00:51:33,200 --> 00:51:35,480 Oh,he's right on one. 哦 他说得对 485 00:51:35,480 --> 00:51:40,120 This seal behaviour has never been filmed before,and the crew now 海豹的这种行为以前从未被拍摄过 现在船员们也在拍摄 486 00:51:40,120 --> 00:51:43,760 have to overcome the far harder challenge of documenting 必须克服记录的困难得多的挑战 487 00:51:43,760 --> 00:51:45,920 it from underwater. 它是从水下发射的 488 00:51:45,920 --> 00:51:48,080 He's away down . 他离开了 489 00:51:48,080 --> 00:51:50,920 Freshwater seals are extremely shy, 淡水海豹非常害羞 490 00:51:50,920 --> 00:51:53,240 so in order to do this,the crew 所以为了做到这一点 船员们 491 00:51:53,240 --> 00:51:55,720 need to use remote cameras. 需要使用远程摄像机 492 00:51:55,720 --> 00:51:58,640 Hopefully,these are going to capture that seal behaviour, 希望这些能捕捉到海豹的行为 493 00:51:58,640 --> 00:52:00,880 seals attacking the salmon, 海豹攻击鲑鱼 494 00:52:00,880 --> 00:52:03,600 and that'll go with the incredible 这将伴随着不可思议的 495 00:52:03,600 --> 00:52:06,160 drone shots that we've already got. 我们已经有了无人机射击 496 00:52:10,000 --> 00:52:12,720 Stop.Yep.Perfect. 停止是的 完美的 497 00:52:12,720 --> 00:52:15,240 Oh,it looks good,mate. 哦 看起来不错 伙计 498 00:52:15,240 --> 00:52:17,080 Horizon's good. 地平线很好 499 00:52:17,080 --> 00:52:20,080 So if they come in,if they come in and feed here, 所以如果他们进来 如果他们来这里吃饭 500 00:52:20,080 --> 00:52:22,560 we're going to get some pictures. 我们要拍一些照片 501 00:52:25,120 --> 00:52:27,320 Here he comes,here he comes. 他来了 他来了 502 00:52:27,320 --> 00:52:29,240 He's just sniffing around right now. 他现在只是在四处嗅探 503 00:52:29,240 --> 00:52:31,600 So we've just started getting some 所以我们刚刚开始得到一些 504 00:52:31,600 --> 00:52:33,680 little bits of the seals coming in, 一点点海豹飞来 505 00:52:33,680 --> 00:52:36,560 but we're not quite in the right place.We haven't been in quite the 但我们的位置不对 我们还没有完全进入状态 506 00:52:36,560 --> 00:52:38,880 right place,but now we've positioned 正确的位置 但现在我们已经定位 507 00:52:38,880 --> 00:52:41,560 it right where we think that this seal is going to stop 就在我们认为海豹会停下来的地方 508 00:52:41,560 --> 00:52:44,880 and wait and then jump up and grab a fish. 等一下 然后跳起来抓一条鱼 509 00:52:44,880 --> 00:52:46,480 Fingers crossed,it works. 祈祷成功 510 00:52:46,480 --> 00:52:48,000 Coming in. 进来 511 00:52:48,000 --> 00:52:51,280 OK,he's getting in a good place for this one.Yeah. 好吧 他现在正处于一个好位置 是 啊 512 00:52:51,280 --> 00:52:54,640 After days of catching mere glimpses .That's a good shot. 经过几天的一瞥 那是个好机会 513 00:52:54,640 --> 00:52:58,720 the crew finally have their cameras in the perfect position. 机组人员终于把摄像机放在了完美的位置 514 00:52:58,720 --> 00:53:02,400 Oh,good,good,good,good,good,good,good,good,good! Oh! Oh! 哦 好 好 好 好 好 好 好 好 好 好！哦哦 515 00:53:02,400 --> 00:53:05,160 Oh,so close! He missed! 哦 太近了！他错过了！ 516 00:53:05,160 --> 00:53:07,400 So,there he is.See him coming up there? 那么 他来了 看到他上来了吗？ 517 00:53:09,120 --> 00:53:10,760 He might be about to charge again. 他可能会再次冲锋 518 00:53:10,760 --> 00:53:12,760 Oh! Got him! 哦抓住他了！ 519 00:53:14,640 --> 00:53:16,320 Oh,mate,on both cameras! 哦 伙计 在两台摄像机上！ 520 00:53:18,560 --> 00:53:20,680 It's a great success,but it was 这是一个巨大的成功 但确实是 521 00:53:20,680 --> 00:53:22,840 only going to be a matter of time 只是时间问题 522 00:53:22,840 --> 00:53:25,160 before the crew meet the salmon's 在船员们见到鲑鱼之前 523 00:53:25,160 --> 00:53:27,520 other predators. 其他掠食者 524 00:53:29,040 --> 00:53:31,400 There's a bear. 有一只熊 525 00:53:40,200 --> 00:53:43,760 Oh.Get ready with the cameras.OK. 哦准备好摄像机 好啊 526 00:53:43,760 --> 00:53:46,720 It's dangerous to surprise a grizzly, 给灰熊一个惊喜是很危险的 527 00:53:46,720 --> 00:53:48,600 so Olly lets the bear know 所以奥利让熊知道 528 00:53:48,600 --> 00:53:50,440 that the crew are close. 船员们离得很近 529 00:53:51,440 --> 00:53:54,440 Hey,bear! Hey,bear! 嘿 小熊！嘿 小熊！ 530 00:53:54,440 --> 00:53:56,880 I'm watching this bear.Yeah. 我在看这只熊 是 啊 531 00:53:56,880 --> 00:53:58,480 Hey,bear.Hey,bear. 嘿 小熊 嘿 小熊 532 00:53:59,600 --> 00:54:01,600 That's close enough. 够近了 533 00:54:01,600 --> 00:54:03,840 Hey,bear.Hey,bear. 嘿 小熊 嘿 小熊 534 00:54:03,840 --> 00:54:05,400 You stay back. 你往后退 535 00:54:05,400 --> 00:54:07,680 Like,obviously,hindsight is a lovely thing. 很明显 事后诸葛亮是件好事 536 00:54:07,680 --> 00:54:11,400 We're probably a bit too close to the river and to all the fish. 我们可能离这条河和所有的鱼都有点太近了 537 00:54:11,400 --> 00:54:13,720 I think we just need to move back a little bit and just stay 我想我们只需要往后退一点 留下来 538 00:54:13,720 --> 00:54:15,000 a bit further away. 再远一点 539 00:54:16,280 --> 00:54:18,840 This is his river,not our river, 这是他的河 不是我们的河 540 00:54:18,840 --> 00:54:21,400 so we'll let him catch his lunch. 所以我们让他去吃午饭 541 00:54:22,880 --> 00:54:25,360 I mean,it could be amazing because we've got this really 我的意思是 这可能会很神奇 因为我们真的做到了 542 00:54:25,360 --> 00:54:28,160 clear water.We could get some really unique shots of bears walking 清澈的水 我们可以拍到一些非常独特的熊行走的照片 543 00:54:28,160 --> 00:54:30,760 through salmon and actually able to see the whole bear. 通过鲑鱼 实际上可以看到整个熊 544 00:54:30,760 --> 00:54:33,720 The slight downside to that is either the bear treads on the camera 这有一点不好 那就是熊会踩在摄像机上 545 00:54:33,720 --> 00:54:36,240 or grabs it or does anything to it. 或者抓住它或者对它做任何事 546 00:54:36,240 --> 00:54:39,320 It's .Basically the plan is to put quite an expensive camera 是 基本上 计划是安装一台相当昂贵的照相机 547 00:54:39,320 --> 00:54:42,280 underneath the feet of a charging bear. 在冲锋熊的脚下 548 00:54:42,280 --> 00:54:43,320 So . 所以 549 00:54:44,720 --> 00:54:49,040 David positions the remote cameras in deeper water in the hope 大卫将遥控摄像机安置在希望号深水区 550 00:54:49,040 --> 00:54:52,040 of capturing an extremely rare perspective 捕捉一个极其罕见的视角 551 00:54:52,040 --> 00:54:53,920 of a hunting grizzly bear. 一只正在打猎的灰熊 552 00:54:57,200 --> 00:54:59,760 Still coming? Yeah.Maybe get out. 还要来吗？是 啊也许出去 553 00:55:04,040 --> 00:55:05,720 OK,got him.Oh,nice! 好的 抓住他了 哦 太好了！ 554 00:55:06,760 --> 00:55:09,400 Yes! OK,we got him. 对好的 我们抓到他了 555 00:55:09,400 --> 00:55:13,040 It works,and they capture a salmon's-eye view of one 这是可行的 他们捕捉到了一张三文鱼的眼睛 556 00:55:13,040 --> 00:55:17,640 of the biggest challenges they face on their breeding migration. 它们在繁殖迁徙中面临的最大挑战之一 557 00:55:21,760 --> 00:55:25,080 Although the plan for getting the camera close to the bear works 虽然让摄像机靠近熊的计划是可行的 558 00:55:25,080 --> 00:55:27,160 maybe a little bit too well! 也许有点太好了！ 559 00:55:35,400 --> 00:55:38,400 We have to look at one upside down now because the bear's completely 我们现在必须把一只颠倒过来看 因为熊已经完全死了 560 00:55:38,400 --> 00:55:40,800 rolled it! 滚！ 561 00:55:40,800 --> 00:55:42,200 Is it intact? 它完好无损吗？ 562 00:55:42,200 --> 00:55:46,400 Miraculously,the camera survives,and it's now time for David 奇迹般地 摄像机幸存了下来 现在是大卫的时候了 563 00:55:46,400 --> 00:55:48,880 to finish telling the salmon story 说完鲑鱼的故事 564 00:55:48,880 --> 00:55:51,200 by trying to film them spawning. 通过拍摄它们产卵的过程 565 00:55:58,040 --> 00:56:01,640 So we have found just a magical part of the world. 所以我们发现了世界上神奇的一部分 566 00:56:03,600 --> 00:56:06,600 Just the amount of activity here, 只是这里的活动量 567 00:56:06,600 --> 00:56:08,840 it's just epic,what is happening. 这只是史诗 发生了什么 568 00:56:13,200 --> 00:56:15,200 What has really surprised me 什么让我感到惊讶 569 00:56:15,200 --> 00:56:17,160 about spending so much time 花这么多时间 570 00:56:17,160 --> 00:56:19,600 with these salmon is really how 用这些鲑鱼真的怎么样 571 00:56:19,600 --> 00:56:22,040 intricate this behaviour is. 这种行为错综复杂 572 00:56:22,040 --> 00:56:24,720 There's so much going on with these 这些有太多的事情要做了 573 00:56:24,720 --> 00:56:26,720 fish as they compete 比赛时钓鱼 574 00:56:26,720 --> 00:56:28,840 to be really the mating pair. 成为真正的配对 575 00:56:32,320 --> 00:56:36,000 Yeah,fish .Like,fish sex is,you know .I feel, 是啊 鱼 比如说 鱼肉性爱 你知道的 我觉得, 576 00:56:36,000 --> 00:56:38,440 like,a little awkward . 有点尴尬 577 00:56:38,440 --> 00:56:41,040 watching that for hours,but they don't seem 看了好几个小时 但他们似乎 578 00:56:41,040 --> 00:56:42,960 to care,so I guess it's cool. 我想这很酷 579 00:56:44,720 --> 00:56:47,080 With some luck and some ingenuity, 带着一些运气和智慧 580 00:56:47,080 --> 00:56:49,160 the team capture almost every 该团队几乎捕获了所有 581 00:56:49,160 --> 00:56:51,680 challenge that the red salmon must 挑战红鲑鱼必须 582 00:56:51,680 --> 00:56:53,440 overcome in order to win 战胜 583 00:56:53,440 --> 00:56:54,920 the mating game. 交配游戏 584 00:57:02,040 --> 00:57:04,040 Next time . 下一次 585 00:57:04,040 --> 00:57:06,720 The need to breed drives all life, 繁殖的需要驱动着所有的生命 586 00:57:06,720 --> 00:57:08,360 but the challenges faced 但面临的挑战 587 00:57:08,360 --> 00:57:09,680 are by no means equal. 他们决不平等 588 00:57:10,920 --> 00:57:12,840 Some in the mating game must 交配游戏中的一些人必须 589 00:57:12,840 --> 00:57:14,920 overcome overwhelming odds 克服压倒性的困难 590 00:57:14,920 --> 00:57:17,560 to have any chance of success, 有任何成功的机会 591 00:57:17,560 --> 00:57:20,520 and the changes WE are creating 以及我们正在创造的变化 592 00:57:20,520 --> 00:57:22,680 are the greatest challenge of all. 这是最大的挑战