1 00:00:06,087 --> 00:00:09,159 The power of the sun drives the seasons, 2 00:00:09,247 --> 00:00:11,317 transforming our planet. 3 00:00:12,647 --> 00:00:16,037 Vast movements of ocean and air currents 4 00:00:16,127 --> 00:00:18,960 bring dramatic change throughout the year. 5 00:00:23,367 --> 00:00:27,326 And in a few special places, these seasonal changes 6 00:00:27,407 --> 00:00:31,559 create some of the greatest wildlife spectacles on Earth. 7 00:00:39,167 --> 00:00:41,522 Here on the western coast of North America 8 00:00:41,607 --> 00:00:43,325 in the spring of each year, 9 00:00:43,407 --> 00:00:47,002 one of the Earth's greatest travellers comes home. 10 00:00:48,447 --> 00:00:51,917 Over half a billion salmon in the Pacific Ocean 11 00:00:52,007 --> 00:00:54,646 start on a 3,000-mile journey, 12 00:00:54,727 --> 00:00:58,242 returning to spawn in the rivers where they were born. 13 00:01:04,247 --> 00:01:06,283 Travelling deep into the continent, 14 00:01:06,367 --> 00:01:10,406 these fish will not only provide food for millions of animals, 15 00:01:14,887 --> 00:01:16,684 they will also bring life 16 00:01:16,767 --> 00:01:20,476 to one of the richest habitats on Earth. 17 00:01:22,000 --> 00:01:28,074 Advertise your product or brand here contact www.OpenSubtitles.org today 18 00:01:47,127 --> 00:01:50,199 The coast of British Columbia and Alaska 19 00:01:50,287 --> 00:01:53,484 is rimmed by spectacular mountains. 20 00:01:57,567 --> 00:01:59,125 Although it will be months 21 00:01:59,207 --> 00:02:03,041 before the salmon enter the rivers below these frozen peaks, 22 00:02:03,727 --> 00:02:07,640 one species that has spent the winter sleeping up here 23 00:02:07,727 --> 00:02:10,321 is already anticipating their return. 24 00:02:15,167 --> 00:02:18,318 In January, snug in their dens, 25 00:02:18,407 --> 00:02:20,682 the females have given birth 26 00:02:20,767 --> 00:02:23,918 and now the family is beginning to stir. 27 00:02:41,967 --> 00:02:43,878 Grizzly bears. 28 00:02:47,807 --> 00:02:52,835 Whether the cubs will live or die depends largely on one key event, 29 00:02:53,127 --> 00:02:54,640 the salmon run. 30 00:02:54,927 --> 00:02:56,326 For the next five months, 31 00:02:56,407 --> 00:02:59,240 the bears will be focused on making their appointment 32 00:02:59,327 --> 00:03:01,363 with the returning salmon. 33 00:03:20,527 --> 00:03:24,156 Surviving the first year is hard. 34 00:03:24,247 --> 00:03:27,956 Half of all grizzly cubs don't make it. 35 00:03:42,007 --> 00:03:44,965 Throughout Alaska and British Columbia, 36 00:03:45,047 --> 00:03:49,006 thousands of bear families are emerging from their winter sleep. 37 00:03:51,607 --> 00:03:53,916 There is nothing to eat up here, 38 00:03:54,007 --> 00:03:57,124 but the conditions were ideal for hibernation - 39 00:03:59,207 --> 00:04:02,677 lots of snow in which to dig a den. 40 00:04:06,727 --> 00:04:11,118 To find food, mothers must lead their cubs down to the coast 41 00:04:11,207 --> 00:04:14,005 where the snow will already be melting. 42 00:04:18,727 --> 00:04:23,437 But getting down can be a challenge for small cubs. 43 00:04:52,207 --> 00:04:55,085 These mountains are dangerous places. 44 00:04:55,687 --> 00:04:58,918 But ultimately, the fate of these bear families 45 00:04:59,007 --> 00:05:02,682 and indeed that of all bears around the North Pacific, 46 00:05:02,767 --> 00:05:04,917 depends on the salmon. 47 00:05:06,487 --> 00:05:11,515 Right now, those salmon are more than 2,000 miles away. 48 00:05:16,527 --> 00:05:18,404 After four years at sea, 49 00:05:18,487 --> 00:05:21,957 half a billion Pacific salmon are going home, 50 00:05:22,047 --> 00:05:24,322 back to fresh water 51 00:05:24,407 --> 00:05:28,639 to lay their eggs in the rivers where they themselves were hatched. 52 00:05:40,407 --> 00:05:42,967 How the salmon manage to find their way back home 53 00:05:43,047 --> 00:05:46,926 across the open ocean is still largely a mystery. 54 00:05:49,247 --> 00:05:52,683 It has only recently been discovered that a salmon's brain 55 00:05:52,767 --> 00:05:57,204 contains small particles of iron that, like a compass, 56 00:05:57,287 --> 00:06:00,120 help it steer the magnetic lines of the Earth, 57 00:06:00,207 --> 00:06:03,085 showing them exactly where to go. 58 00:06:23,087 --> 00:06:26,841 For many of these salmon, that destination is here 59 00:06:26,927 --> 00:06:31,000 along the western coast of North America in British Columbia. 60 00:06:37,887 --> 00:06:40,924 They are making their way back to their birthplace 61 00:06:41,007 --> 00:06:44,795 in one of its many freshwater rivers and streams. 62 00:06:48,767 --> 00:06:52,157 Here, amongst the network of lakes and waterways, 63 00:06:52,247 --> 00:06:57,321 lies the largest expanse of temperate rainforest left in the world. 64 00:07:00,247 --> 00:07:05,162 It stretches from southern British Columbia to Alaska. 65 00:07:12,407 --> 00:07:16,525 It's one of the most fertile landscapes on the planet. 66 00:07:28,887 --> 00:07:34,041 The temperate rainforest supports even more life than its tropical counterpart. 67 00:07:39,927 --> 00:07:43,761 For thousands of years, salmon have returned to this country 68 00:07:43,847 --> 00:07:48,125 because of the abundance of one element: fresh water. 69 00:08:13,727 --> 00:08:17,163 This is some of the purest water in the world, 70 00:08:17,247 --> 00:08:19,442 thanks to these forests. 71 00:08:34,047 --> 00:08:36,925 Where the forests are still undisturbed, 72 00:08:37,007 --> 00:08:40,238 the soil, held by millions of tree roots, 73 00:08:40,327 --> 00:08:44,878 filters the water, keeping the rivers flowing clean and pure. 74 00:08:55,287 --> 00:08:58,882 In May, grizzly bears come down to the coast 75 00:08:58,967 --> 00:09:03,483 to find something to eat while they await the arrival of the salmon. 76 00:09:04,727 --> 00:09:07,878 This is where spring arrives first. 77 00:09:15,607 --> 00:09:19,077 The cubs, still feeding on nothing but their mother's milk, 78 00:09:19,167 --> 00:09:21,123 have grown considerably. 79 00:09:26,167 --> 00:09:31,036 But it has been six months since their mother had anything to eat. 80 00:09:41,247 --> 00:09:43,238 Now they need other food 81 00:09:43,327 --> 00:09:46,444 and the search for it can lead them into danger. 82 00:09:50,807 --> 00:09:53,958 Some males will try to kill cubs. 83 00:09:57,607 --> 00:10:00,167 The breeding season has begun, 84 00:10:01,207 --> 00:10:04,324 and big males are here looking for females. 85 00:10:21,087 --> 00:10:24,045 But at least there is something to eat here, 86 00:10:24,127 --> 00:10:26,766 even if it's only grass and sedges. 87 00:10:29,407 --> 00:10:33,116 These greens, in fact, can keep them going for months, 88 00:10:33,207 --> 00:10:35,357 but they will need something more nutritious 89 00:10:35,447 --> 00:10:37,085 if they are to put on enough fat 90 00:10:37,167 --> 00:10:40,045 to enable them to survive the next winter. 91 00:10:45,487 --> 00:10:50,436 In some places along the coast, bears find much richer food. 92 00:10:53,807 --> 00:10:58,164 It's buried, but bears have an extremely acute sense of smell 93 00:10:58,247 --> 00:11:02,843 and can sniff out a meal even if it's beneath the wet sand. 94 00:11:08,847 --> 00:11:10,041 Clams. 95 00:11:18,087 --> 00:11:20,601 It's not only bears that are drawn to the coast 96 00:11:20,687 --> 00:11:22,518 in search of food. 97 00:11:27,007 --> 00:11:31,637 There are more than 2,000 grey wolves in the Great Forest. 98 00:11:35,727 --> 00:11:39,925 They leave their cubs in the tidal areas while they hunt. 99 00:11:47,687 --> 00:11:50,679 This wolf is the pups' eldest brother. 100 00:11:50,767 --> 00:11:54,157 He's baby-sitting while the adults are away hunting. 101 00:11:54,327 --> 00:11:56,477 He doesn't have any food for the cubs, 102 00:11:56,567 --> 00:11:58,876 so they eat whatever they can find, 103 00:11:58,967 --> 00:12:01,765 even chewing the barnacles off the rocks. 104 00:12:10,607 --> 00:12:15,237 They, like the bears, are awaiting the arrival of the salmon. 105 00:12:24,247 --> 00:12:28,365 The adults return and find an intruder. 106 00:12:29,807 --> 00:12:32,765 A hungry bear has wandered into their patch. 107 00:12:37,287 --> 00:12:40,996 Coastal wolves will often kill and eat small bears. 108 00:12:50,447 --> 00:12:52,961 But this bear is very big. 109 00:13:12,087 --> 00:13:16,365 Eventually, they decide that this one is just too big. 110 00:13:27,447 --> 00:13:31,440 By July, the bears are all getting very hungry indeed. 111 00:13:32,247 --> 00:13:34,920 And still the salmon are not here. 112 00:13:43,727 --> 00:13:47,766 And then, after two months of travelling across the open ocean, 113 00:13:47,847 --> 00:13:49,963 the salmon reach the coast. 114 00:13:55,807 --> 00:13:59,880 As they near the shore, they begin to smell fresh water. 115 00:14:08,687 --> 00:14:11,326 There are thousands of rivers flowing into the sea, 116 00:14:11,407 --> 00:14:14,205 and the salmon have to find the particular one 117 00:14:14,287 --> 00:14:17,040 that will lead them to their birthplace. 118 00:14:20,127 --> 00:14:23,722 They have a truly extraordinary sense of smell. 119 00:14:26,767 --> 00:14:30,157 They can distinguish a single drop from their home river 120 00:14:30,247 --> 00:14:33,956 amongst eight million litres of sea water. 121 00:14:38,367 --> 00:14:43,122 As they detect the waters of home, they converge into the narrow fjords, 122 00:14:43,207 --> 00:14:45,596 which act as underwater corridors. 123 00:14:48,407 --> 00:14:52,116 But other creatures also know these corridors. 124 00:14:56,247 --> 00:15:00,240 Killer whales. They eat a lot of salmon. 125 00:15:08,367 --> 00:15:11,120 And so do Steller sea lions. 126 00:15:26,207 --> 00:15:31,156 Salmon sharks are here, too, specifically to feed on salmon. 127 00:15:37,367 --> 00:15:41,519 But there is one predator that they can never see coming. 128 00:15:45,327 --> 00:15:47,318 The bald-headed eagle. 129 00:16:34,407 --> 00:16:36,967 Once past these coastal predators, 130 00:16:37,047 --> 00:16:40,198 there is little to prevent them from reaching their home river. 131 00:16:40,287 --> 00:16:42,005 It's now late July 132 00:16:42,087 --> 00:16:46,239 and the salmon are poised at the edge of their inland realm. 133 00:16:52,447 --> 00:16:54,677 In the estuaries of the larger rivers, 134 00:16:54,767 --> 00:16:58,885 all five species of Pacific salmon mingle together. 135 00:16:59,367 --> 00:17:04,202 Pink, chum, coho, sockeye and Chinook. 136 00:17:10,687 --> 00:17:13,724 The drive to get into the rivers is strong. 137 00:17:13,807 --> 00:17:16,799 Their eggs will only survive in fresh water. 138 00:17:24,407 --> 00:17:27,922 In late July, however, the water level is often too low 139 00:17:28,007 --> 00:17:31,317 for the first salmon to enter the smaller rivers. 140 00:17:39,007 --> 00:17:41,282 That doesn't stop them trying. 141 00:17:45,327 --> 00:17:48,876 But the very water that has drawn them back home 142 00:17:48,967 --> 00:17:51,162 will eventually kill them. 143 00:17:53,847 --> 00:17:58,921 As their kidneys and other organs adjust to the sudden lack of salt water, 144 00:17:59,407 --> 00:18:02,001 they stop eating and even drinking. 145 00:18:03,727 --> 00:18:07,436 So the energy stored in their bodies is all they have 146 00:18:07,527 --> 00:18:10,519 to power their swim upriver and spawn. 147 00:18:14,327 --> 00:18:17,478 However, the salmon in the smaller streams 148 00:18:17,567 --> 00:18:20,161 have a more immediate problem. 149 00:18:21,847 --> 00:18:23,599 The low water has stopped them 150 00:18:23,687 --> 00:18:26,804 before their journey upstream can even begin. 151 00:18:35,167 --> 00:18:39,797 But their coast, every year, is swept by great storms. 152 00:18:43,447 --> 00:18:47,998 In the skies above the North Pacific, a huge eddy is forming. 153 00:18:50,047 --> 00:18:54,723 It moves towards the coast and the high coastal mountains. 154 00:19:17,607 --> 00:19:21,805 The clouds are driven up and over this massive barrier, 155 00:19:21,887 --> 00:19:24,720 and they drop their load of water. 156 00:19:51,207 --> 00:19:56,486 The Great Forest gets up to three metres of rainfall a year. 157 00:20:04,407 --> 00:20:06,363 Bears have thick coats 158 00:20:06,447 --> 00:20:09,837 and the heavy rain doesn't seem to bother them at all. 159 00:20:18,087 --> 00:20:22,239 The steep Rocky Mountains funnel the rainwater into the rivers 160 00:20:22,327 --> 00:20:24,443 and levels quickly rise. 161 00:20:35,887 --> 00:20:38,879 This is what the salmon have been waiting for. 162 00:20:48,527 --> 00:20:51,963 The first wave of travellers advance upstream. 163 00:20:58,607 --> 00:21:00,484 No sooner do they start 164 00:21:00,567 --> 00:21:03,400 than they are faced with another challenge. 165 00:21:08,007 --> 00:21:13,081 But six million years of evolution have prepared the salmon well. 166 00:21:34,407 --> 00:21:38,764 Their bodies are solid muscle and perfectly streamlined. 167 00:21:42,607 --> 00:21:44,563 Clearing these falls for a salmon 168 00:21:44,647 --> 00:21:48,640 is like a human being jumping over a four-storey building. 169 00:22:02,167 --> 00:22:07,195 In many of these falls, however, the salmon face more than just water. 170 00:22:10,887 --> 00:22:12,684 The bears know that this is 171 00:22:12,767 --> 00:22:16,362 where they can get the first proper meal of the season. 172 00:22:18,927 --> 00:22:20,838 But it's not easy. 173 00:22:23,767 --> 00:22:27,077 There is an art to catching a leaping salmon. 174 00:22:31,287 --> 00:22:34,165 And this young bear hasn't yet acquired it. 175 00:22:41,127 --> 00:22:44,164 This is what salmon were born to do. 176 00:22:51,727 --> 00:22:56,164 They are driven to get up these rivers to their spawning grounds. 177 00:22:57,087 --> 00:23:00,523 Their parents made it up here, and nothing short of death 178 00:23:00,607 --> 00:23:03,519 will stop them from repeating that journey. 179 00:23:08,007 --> 00:23:12,205 They are trying to get to the exact stretch of gravel where they hatched. 180 00:23:15,447 --> 00:23:19,520 Some lucky ones may only have to go a few miles inland. 181 00:23:19,687 --> 00:23:23,396 But others are faced with a truly daunting journey. 182 00:23:28,887 --> 00:23:32,197 The farthest that salmon have been known to swim upriver 183 00:23:32,287 --> 00:23:35,006 is 2,000 miles. 184 00:23:38,967 --> 00:23:42,357 Summer rains can be short, and when they stop 185 00:23:42,447 --> 00:23:46,884 the water levels in many of the rivers along the coast drop quickly. 186 00:23:49,687 --> 00:23:53,885 The first salmon in the rivers are once again trapped by shallow water. 187 00:23:53,967 --> 00:23:57,118 And worse, they're in bear country now. 188 00:24:00,607 --> 00:24:04,919 In early August, mother bears begin to patrol the rivers looking for fish. 189 00:24:05,007 --> 00:24:08,636 Like this one, they are usually skinny and starving. 190 00:24:18,087 --> 00:24:21,397 She and her cubs have eaten nothing but plants 191 00:24:21,487 --> 00:24:23,717 since they emerged from their den. 192 00:24:23,807 --> 00:24:27,038 They are in desperate need of a proper meal. 193 00:24:31,287 --> 00:24:36,236 Bears of all ages and experience come to the rivers to look for salmon. 194 00:24:40,807 --> 00:24:45,005 The first fish of the season, however, are hard to catch. 195 00:24:47,807 --> 00:24:50,844 This young bear is still learning how to do it. 196 00:24:51,287 --> 00:24:54,677 Step number one is spotting a salmon. 197 00:24:57,767 --> 00:25:00,486 A higher perspective usually helps. 198 00:25:03,927 --> 00:25:07,636 In these early days, fish are few and far between. 199 00:25:11,247 --> 00:25:15,035 And when they do appear, they are moving very fast. 200 00:25:44,007 --> 00:25:47,079 The salmon also have lots of places to hide. 201 00:25:47,527 --> 00:25:49,916 The rivers are only shallow in short stretches 202 00:25:50,007 --> 00:25:54,478 and they can quickly shoot across them and escape into the deep pools. 203 00:26:02,607 --> 00:26:04,438 This mother and her cubs 204 00:26:04,527 --> 00:26:06,279 are going to have to wait a little longer 205 00:26:06,367 --> 00:26:09,598 for the conditions to change before they can get the meals 206 00:26:09,687 --> 00:26:11,405 they so badly need. 207 00:26:18,727 --> 00:26:20,001 But for the salmon, 208 00:26:20,087 --> 00:26:23,443 these deep-water refuges are becoming prisons. 209 00:26:30,727 --> 00:26:35,039 It may be weeks before it rains again and they can move on. 210 00:26:40,847 --> 00:26:44,123 Their bodies are now beginning to change. 211 00:26:44,727 --> 00:26:49,278 As their sex hormones stimulate the production of eggs and sperm, 212 00:26:49,367 --> 00:26:51,517 their skin changes colour. 213 00:26:54,247 --> 00:26:58,081 Some develop a humped back and a hooked nose. 214 00:27:00,687 --> 00:27:03,838 All these changes use up precious energy. 215 00:27:04,247 --> 00:27:06,602 The longer the fish wait in these pools, 216 00:27:06,687 --> 00:27:08,405 the less likely they will be able 217 00:27:08,487 --> 00:27:11,797 to complete the journey to their spawning grounds. 218 00:27:16,607 --> 00:27:19,804 The mother bear and her cubs, finding little in the shallows, 219 00:27:19,887 --> 00:27:23,721 now try their luck in the deeper salmon-filled pools. 220 00:27:30,207 --> 00:27:32,960 The salmon are easy enough to see. 221 00:27:36,807 --> 00:27:38,525 With so many fish here, 222 00:27:38,607 --> 00:27:42,202 this young bear should surely be able to catch something. 223 00:27:47,367 --> 00:27:50,962 But finding the salmon is only part of the problem. 224 00:27:53,967 --> 00:27:56,322 Bears must pin a salmon to the stream bed 225 00:27:56,407 --> 00:27:57,920 in order to catch it. 226 00:27:58,007 --> 00:28:00,726 Not easy in deep water. 227 00:28:04,007 --> 00:28:06,396 Older bears know that it's almost impossible 228 00:28:06,487 --> 00:28:08,523 to get a meal this way. 229 00:28:11,647 --> 00:28:15,356 But while the salmon here may be relatively safe from the bears, 230 00:28:15,447 --> 00:28:17,517 they are not out of danger. 231 00:28:22,407 --> 00:28:27,037 The late summer sun is warming the water so that levels are dropping 232 00:28:27,127 --> 00:28:30,836 and the amount of dissolved oxygen is decreasing. 233 00:28:34,927 --> 00:28:39,478 The time spent in these worsening conditions is beginning to show. 234 00:28:45,087 --> 00:28:49,444 The experienced bears show the youngsters what to do. 235 00:28:50,407 --> 00:28:53,399 Catching live salmon in these pools may be difficult, 236 00:28:53,487 --> 00:28:55,557 but there are dead ones for the taking, 237 00:28:55,647 --> 00:28:58,036 if only the bears can reach them. 238 00:29:03,927 --> 00:29:08,478 The problem is that most bears don't like to get their ears wet. 239 00:29:22,367 --> 00:29:26,042 However, the old bears know a trick or two. 240 00:29:34,607 --> 00:29:38,043 It just needs a little fancy footwork. 241 00:30:03,127 --> 00:30:06,756 This year, the water levels are particularly low 242 00:30:06,847 --> 00:30:10,396 and by September, the salmon are in real trouble. 243 00:30:12,527 --> 00:30:15,246 In the confined oxygen-poor water, 244 00:30:15,327 --> 00:30:18,956 there is an increased risk of parasites and infections. 245 00:30:23,207 --> 00:30:26,279 In some years, these conditions can get so bad 246 00:30:26,367 --> 00:30:30,883 that most of the salmon die before they even reach the spawning grounds. 247 00:30:36,567 --> 00:30:41,083 What they need is more rain. And soon. 248 00:30:44,887 --> 00:30:49,642 Luckily, this year the autumn rains arrive on time. 249 00:31:15,567 --> 00:31:18,764 The salmon can set off once again. 250 00:31:21,447 --> 00:31:25,759 However, so much rain brings different challenges. 251 00:31:31,247 --> 00:31:35,399 The fish now have to battle against powerful torrents. 252 00:31:47,287 --> 00:31:51,565 But the salmon know how to turn this swift, turbulent water 253 00:31:51,647 --> 00:31:53,683 to their own advantage. 254 00:32:06,607 --> 00:32:11,203 Scarcely beating their tails, they manage to propel themselves forward 255 00:32:11,287 --> 00:32:13,357 by using the energy of the water, 256 00:32:13,447 --> 00:32:17,235 much as a sailboat does when tacking into the wind. 257 00:32:43,367 --> 00:32:46,120 But that doesn't mean there will be no further problem 258 00:32:46,207 --> 00:32:48,767 in reaching the spawning grounds. 259 00:33:10,087 --> 00:33:14,558 This is going to be the end of the road for a lot of salmon. 260 00:33:16,327 --> 00:33:18,602 These bears are really hungry. 261 00:33:18,687 --> 00:33:21,155 They haven't tasted salmon for 10 months 262 00:33:21,247 --> 00:33:24,922 and the big males battle for the best fishing spots. 263 00:33:31,527 --> 00:33:34,837 The longer the salmon take over their journey upstream, 264 00:33:34,927 --> 00:33:36,997 the weaker they become. 265 00:33:40,327 --> 00:33:43,876 And these falls present them with their biggest challenge yet. 266 00:33:45,647 --> 00:33:49,959 Although the falls aren't very tall, the bears hold the high ground. 267 00:33:52,687 --> 00:33:57,442 The salmon make short exploratory leaps to see where the bears are. 268 00:34:12,327 --> 00:34:14,795 But they don't always get it right. 269 00:34:20,087 --> 00:34:24,205 This mother bear has been waiting months for this moment. 270 00:34:26,407 --> 00:34:29,444 Competition is fierce for these first salmon, 271 00:34:29,527 --> 00:34:32,280 even between a mother and her own cubs. 272 00:34:37,967 --> 00:34:41,516 More and more fish arrive at the foot of the falls. 273 00:34:52,127 --> 00:34:56,837 Eventually they have to go for it, regardless of the danger. 274 00:35:35,007 --> 00:35:37,965 But numbers are on their side. 275 00:35:38,047 --> 00:35:42,757 For every salmon that gets caught, hundreds make it past the bears. 276 00:36:15,567 --> 00:36:17,125 By early September, 277 00:36:17,207 --> 00:36:20,836 the salmon have almost reached their spawning grounds, 278 00:36:20,927 --> 00:36:25,842 that one particular patch of gravel where they hatched four years ago. 279 00:36:30,767 --> 00:36:33,804 The salmon have now travelled far inland 280 00:36:33,887 --> 00:36:37,277 and can be found from California to the Arctic Ocean, 281 00:36:37,367 --> 00:36:41,918 across a fifth of the entire continent of North America. 282 00:36:59,047 --> 00:37:02,198 But the journey has taken a heavy toll. 283 00:37:03,487 --> 00:37:08,481 For every thousand that hatched, only four manage to return. 284 00:37:12,367 --> 00:37:15,564 And even for those salmon that have made it back, 285 00:37:15,647 --> 00:37:17,399 there are still more dangers. 286 00:37:17,487 --> 00:37:20,206 They have finally reached the end of their road 287 00:37:20,287 --> 00:37:23,836 and are so tired and battered that they are easy prey. 288 00:37:24,327 --> 00:37:27,478 The advantage is fully to the bears now. 289 00:38:35,487 --> 00:38:38,559 The bears are spoiled for choice. 290 00:38:42,807 --> 00:38:44,479 In the best spawning areas, 291 00:38:44,567 --> 00:38:47,923 there are thousands of salmon in every mile of river. 292 00:38:51,807 --> 00:38:55,561 The bears here will gorge themselves for the next two months 293 00:38:55,687 --> 00:38:59,282 and the mothers with their cubs can now gain the weight they will need 294 00:38:59,367 --> 00:39:02,564 if they are to make it through the coming winter. 295 00:39:14,527 --> 00:39:19,521 The salmon are so abundant that even the little cub is having a go. 296 00:39:29,327 --> 00:39:33,878 He has caught a female pink, the smallest of the salmon species. 297 00:39:36,527 --> 00:39:40,839 He is already learning the skills he will need to survive as an adult. 298 00:39:47,007 --> 00:39:49,646 But he's got a little way to go yet. 299 00:39:53,647 --> 00:39:56,957 Although the salmon are now at the mercy of the bears, 300 00:39:57,047 --> 00:39:59,163 they will not leave this place. 301 00:39:59,247 --> 00:40:01,886 Their nature impels them to lay their eggs 302 00:40:01,967 --> 00:40:04,322 where they themselves were born. 303 00:40:12,167 --> 00:40:14,397 Even though the bears eat their fill, 304 00:40:14,487 --> 00:40:18,366 there are so many salmon that most will survive to spawn. 305 00:40:24,527 --> 00:40:29,396 The sockeye salmon's brilliant colour signals that they are ready to breed. 306 00:40:30,847 --> 00:40:35,204 Males battle with each other for position behind the females. 307 00:40:43,607 --> 00:40:47,805 The female digs out a shallow scoop as a nest. 308 00:40:58,327 --> 00:41:03,526 The male nestles up against the female, stimulating her to release her eggs. 309 00:41:06,687 --> 00:41:09,997 When she's ready, she lowers herself over the nest. 310 00:41:10,087 --> 00:41:12,317 She begins to turn out her eggs 311 00:41:12,407 --> 00:41:16,036 and the male releases a cloud of sperm into the water. 312 00:41:34,367 --> 00:41:36,961 These salmon are the lottery winners, 313 00:41:37,807 --> 00:41:41,766 the lucky ones that have succeeded in returning here to spawn. 314 00:41:42,727 --> 00:41:46,686 But there are enough of them to seed the next generation. 315 00:41:53,647 --> 00:41:57,276 The spawning season is a time of extreme abundance, 316 00:41:57,367 --> 00:42:00,245 for in the course of ensuring their own survival, 317 00:42:00,327 --> 00:42:04,525 the salmon provide food for a horde of other creatures. 318 00:42:11,727 --> 00:42:16,562 These Bonaparte gulls are collecting one of the season's great delicacies... 319 00:42:17,047 --> 00:42:18,958 salmon eggs. 320 00:42:38,447 --> 00:42:43,396 For the bears, the salmon spawning season is the pinnacle of the year. 321 00:42:50,007 --> 00:42:51,963 But for the salmon, 322 00:42:52,047 --> 00:42:55,562 it's the pinnacle of their entire lives. 323 00:43:01,687 --> 00:43:03,006 All that have reached it 324 00:43:03,087 --> 00:43:06,921 will end their days in the very place where they began them. 325 00:43:18,527 --> 00:43:22,122 The wear and tear of their long journey is now showing. 326 00:43:27,807 --> 00:43:30,924 Their bodies have been deteriorating for weeks 327 00:43:31,007 --> 00:43:35,125 and with this last act of reproduction, they are finally spent. 328 00:43:56,527 --> 00:43:58,518 But even in death, 329 00:43:58,607 --> 00:44:02,600 the salmon continue to benefit the animals of the forest. 330 00:44:08,007 --> 00:44:12,876 The mother and her cubs will continue to fatten themselves on the carcasses 331 00:44:12,967 --> 00:44:15,606 until they are ready to head back up the mountain 332 00:44:15,687 --> 00:44:17,598 to den in November. 333 00:44:22,767 --> 00:44:26,760 Why Pacific salmon have to die after they reproduce 334 00:44:26,847 --> 00:44:28,963 is not clearly understood. 335 00:44:29,687 --> 00:44:34,715 Atlantic salmon don't. They return year after year to spawn. 336 00:44:34,807 --> 00:44:38,436 But the Pacific salmons' decaying bodies nourish the rivers, 337 00:44:38,527 --> 00:44:41,963 providing abundant food for their growing eggs. 338 00:44:43,887 --> 00:44:47,926 And that is what it has been all about for the salmon. 339 00:44:48,847 --> 00:44:53,045 All their trials and tribulations have ensured that the baby salmon, 340 00:44:53,127 --> 00:44:56,563 when they emerge from these beautiful orange globes, 341 00:44:56,647 --> 00:45:00,686 will have everything they need to begin this incredible journey 342 00:45:00,767 --> 00:45:02,837 all over again. 343 00:45:11,727 --> 00:45:16,596 But the legacy of the salmon extends far beyond the rivers and streams. 344 00:45:19,767 --> 00:45:23,476 They are at the heart of a massive network of life. 345 00:45:25,927 --> 00:45:29,886 There are more than 200 species in the Great Forest alone, 346 00:45:30,047 --> 00:45:34,723 plants and insects, birds and mammals, that depend on the salmon. 347 00:45:40,567 --> 00:45:42,683 It's possible that Pacific salmon, 348 00:45:42,767 --> 00:45:45,884 between their time out at sea and their time inland, 349 00:45:45,967 --> 00:45:50,279 feed more life than any other animal species on the planet. 350 00:45:54,887 --> 00:45:59,324 And there is one more beneficiary of the salmon's legacy. 351 00:46:05,167 --> 00:46:09,285 The fish are a unique link between the ocean and the forest. 352 00:46:15,567 --> 00:46:19,480 Born in fresh water, they live their life in the sea 353 00:46:19,567 --> 00:46:23,480 and there gather nutrients with which they build their bodies. 354 00:46:30,127 --> 00:46:34,006 Now, scattered by feeding bears and wolves, 355 00:46:34,087 --> 00:46:38,000 the last bequest of these salmon is to the forest. 356 00:46:48,087 --> 00:46:52,524 Nitrogen, carbon and phosphorus that was gathered in the ocean 357 00:46:52,607 --> 00:46:55,679 is now released from their decaying bodies, 358 00:47:00,927 --> 00:47:05,717 providing the nutrients that enable these trees, 359 00:47:05,807 --> 00:47:09,686 Sitka spruce, red cedar, 360 00:47:11,127 --> 00:47:13,083 and western hemlock, 361 00:47:14,287 --> 00:47:17,438 to grow to such prodigious heights. 362 00:47:21,207 --> 00:47:25,564 It is now known that 80% of the nitrogen in these coastal forests 363 00:47:25,647 --> 00:47:29,435 where the salmon spawn, comes from the sea, 364 00:47:29,527 --> 00:47:32,644 carried in the bodies of the returning fish. 365 00:47:38,007 --> 00:47:41,522 The trees may be growing hundreds of miles from the ocean, 366 00:47:41,607 --> 00:47:44,724 but they are still nourished by its richness. 367 00:47:48,967 --> 00:47:50,878 The rivers of the Great Forest, 368 00:47:50,967 --> 00:47:55,279 like the veins and arteries of an animal, carry its lifeblood, 369 00:47:55,367 --> 00:47:58,200 the Pacific salmon, throughout. 370 00:48:06,007 --> 00:48:10,762 And no animal relies on them more than the grizzly bear. 371 00:48:15,727 --> 00:48:19,800 Thanks in large part to the abundance of the salmon run, 372 00:48:19,887 --> 00:48:24,358 these cubs have survived their first and most difficult year. 373 00:48:25,847 --> 00:48:28,566 The bears will sleep easy each winter 374 00:48:28,967 --> 00:48:33,995 as long as the Pacific salmon are able to continue their epic run. 375 00:48:34,967 --> 00:48:38,118 One of nature's great events. 376 00:49:03,927 --> 00:49:05,918 In making The Great Salmon Run, 377 00:49:06,007 --> 00:49:10,637 filmmaker Jeff Turner wanted to discover exactly how grizzly bears 378 00:49:10,727 --> 00:49:12,718 caught salmon underwater. 379 00:49:22,327 --> 00:49:26,240 But his quest was to take him deeper into the world of the grizzly 380 00:49:26,327 --> 00:49:28,443 than he had ever imagined. 381 00:49:36,967 --> 00:49:39,606 The first challenge that Jeff and the team faced 382 00:49:39,687 --> 00:49:42,918 was to get their latest high-definition camera systems 383 00:49:43,007 --> 00:49:44,963 into the wilds of British Columbia. 384 00:49:45,047 --> 00:49:46,958 This is modern-day wildlife filmmaking. 385 00:49:47,047 --> 00:49:50,756 You can't go anywhere without about half a ton of gear. 386 00:49:50,847 --> 00:49:53,839 It's very discreet. Animals don't notice us at all. 387 00:49:55,167 --> 00:49:58,921 Jeff has more than 20 years' experience of filming grizzlies 388 00:49:59,007 --> 00:50:03,239 and knows how to work with them in the wild better than anyone. 389 00:50:04,127 --> 00:50:05,765 I was just talking to Justin. 390 00:50:05,847 --> 00:50:10,637 He was telling me he just came back from a shoot in Indonesia. 391 00:50:11,327 --> 00:50:13,557 He said he had 15 porters. 392 00:50:13,807 --> 00:50:16,958 I think we must be doing something wrong. 393 00:50:18,607 --> 00:50:22,043 Jeff knows that the only way to film wild grizzlies 394 00:50:22,127 --> 00:50:25,915 is with a small crew and a very sensitive approach. 395 00:50:27,687 --> 00:50:31,646 In order to get the shots he wanted, he used a new digital camera 396 00:50:31,727 --> 00:50:34,036 in a specially built underwater housing 397 00:50:34,127 --> 00:50:36,800 that he could set up close to the fishing bears 398 00:50:36,887 --> 00:50:38,843 without disturbing them. 399 00:50:39,567 --> 00:50:42,559 Getting the camera in place can be tricky, however. 400 00:50:42,647 --> 00:50:45,719 Experience has taught him how to put them at their ease 401 00:50:45,807 --> 00:50:47,479 with just the right tone of voice. 402 00:50:47,567 --> 00:50:50,001 Hey, bear, how ya doin', hey? 403 00:50:50,087 --> 00:50:52,920 I'm gonna scare some fish up there for ya. 404 00:50:53,207 --> 00:50:56,085 That's a good bear. I won't bother you. I won't be long. 405 00:51:03,367 --> 00:51:05,039 This is when you need six hands. 406 00:51:05,127 --> 00:51:07,277 The wild bears seemed intrigued 407 00:51:07,367 --> 00:51:09,039 by this visitor to their river. 408 00:51:09,127 --> 00:51:12,005 You guys are as excited about this as I am. 409 00:51:12,087 --> 00:51:13,964 Okay, and now to the left. 410 00:51:14,047 --> 00:51:16,038 What Jeff was hoping to capture 411 00:51:16,127 --> 00:51:21,042 was a shot of bears catching salmon from both above and below water. 412 00:51:22,287 --> 00:51:24,721 He needed to operate the camera from a distance 413 00:51:24,807 --> 00:51:29,005 so that the bears would be so relaxed they would continue fishing. 414 00:51:30,767 --> 00:51:33,565 But that meant connecting the camera to his computer, 415 00:51:33,647 --> 00:51:35,365 using fibre-optic cable. 416 00:51:35,447 --> 00:51:38,519 ..or if they come through here, you know, catching it. 417 00:51:38,607 --> 00:51:40,518 And all that cable in the river 418 00:51:40,607 --> 00:51:45,283 proved too much of a temptation for one particularly mischievous young bear. 419 00:51:45,447 --> 00:51:48,325 A situation that called for some firm bear-talk from Jeff. 420 00:51:48,407 --> 00:51:52,480 Hey, hey, hey, hey, hey. Drop it. Drop that! 421 00:51:53,327 --> 00:51:54,885 Yah! Yah! Yah! 422 00:52:00,527 --> 00:52:02,802 You guys can't bite the cable. 423 00:52:03,487 --> 00:52:04,715 Jeez! 424 00:52:07,567 --> 00:52:10,957 Luckily, the camera was still working. 425 00:52:12,087 --> 00:52:15,602 But Jeff soon realised that the salmon were avoiding the shallow waters 426 00:52:15,687 --> 00:52:18,645 and he wasn't getting the shots he wanted. 427 00:52:19,567 --> 00:52:22,320 The bears were being drawn to the deep pools 428 00:52:22,407 --> 00:52:24,796 where the salmon were hiding out. 429 00:52:26,287 --> 00:52:28,642 He had to try a new approach. 430 00:52:29,447 --> 00:52:32,837 The water levels in the creek are low and dropping. 431 00:52:33,447 --> 00:52:35,836 It means that the salmon that are in the system now, 432 00:52:35,927 --> 00:52:36,962 they're not moving. 433 00:52:37,047 --> 00:52:40,198 They're just sort of staying in the deeper pools. 434 00:52:40,407 --> 00:52:43,922 So it means that if the fish won't come to me, 435 00:52:44,007 --> 00:52:46,441 I'm gonna have to go to the fish. 436 00:52:47,367 --> 00:52:49,801 Since he didn't have a shaggy fur coat, 437 00:52:49,887 --> 00:52:54,563 Jeff squeezed into a dry suit to protect himself against the icy water. 438 00:52:56,847 --> 00:52:59,281 The camera needed to be on the bottom of the pool, 439 00:52:59,367 --> 00:53:00,959 some three metres deep. 440 00:53:01,047 --> 00:53:05,404 But getting down there in an air-filled dry suit was no easy matter. 441 00:53:14,487 --> 00:53:15,920 I'm bobbing. 442 00:53:16,887 --> 00:53:20,516 Jeff clearly needed to put on some weight. 443 00:53:22,527 --> 00:53:25,485 I feel like I'm in some sort of old medieval movie or something. 444 00:53:25,567 --> 00:53:27,205 Yeah? -Yeah. 445 00:53:28,167 --> 00:53:32,479 Mel Brookes or something. Young Frankenstein. 446 00:53:33,367 --> 00:53:34,561 Okay. 447 00:53:41,527 --> 00:53:44,087 With his improvised diving belt, 448 00:53:44,167 --> 00:53:47,762 he could now get down deep enough to position the camera. 449 00:53:52,887 --> 00:53:54,639 The bears were learning very quickly 450 00:53:54,727 --> 00:53:57,639 that Jeff and his crew were not a threat. 451 00:53:57,927 --> 00:54:02,205 They watched him curiously as he retreated to a respectful distance 452 00:54:02,287 --> 00:54:05,085 and controlled his camera from his laptop. 453 00:54:08,207 --> 00:54:10,402 What would the bears do next? 454 00:54:16,567 --> 00:54:20,924 He didn't have to wait long before the first bear waded into the pool. 455 00:54:22,007 --> 00:54:25,716 But this youngster seemed totally out of his depth. 456 00:54:26,327 --> 00:54:29,763 This is really funny. This little guy, he doesn't know how to get down there 457 00:54:29,847 --> 00:54:32,315 so he can't quite reach the bottom. 458 00:54:33,287 --> 00:54:36,996 So he is just hanging, bobbing along here. 459 00:54:44,367 --> 00:54:48,804 He's got his paw on it. Aw, damn it, he knocked it over, 460 00:54:50,847 --> 00:54:54,157 I think he used it to stand on to kick himself off. 461 00:54:57,087 --> 00:54:59,840 The fish are going straight downhill. 462 00:55:00,567 --> 00:55:02,717 It's a really steep river. 463 00:55:03,127 --> 00:55:04,958 It was back into the chilly water 464 00:55:05,047 --> 00:55:07,720 for Jeff to realign his camera. 465 00:55:18,927 --> 00:55:23,443 Soon it was up and running again and getting some intimate shots. 466 00:55:24,367 --> 00:55:27,245 Got a good shot of his privates there. 467 00:55:30,887 --> 00:55:33,321 Although the salmon were still just out of the reach 468 00:55:33,407 --> 00:55:36,877 of this persistent young bear, the camera wasn't. 469 00:55:37,447 --> 00:55:40,564 Oh no, he's getting close to the camera. 470 00:55:40,767 --> 00:55:43,406 Be careful, bear. Ah, shoot! 471 00:55:46,167 --> 00:55:48,237 He totally knocked it over. 472 00:55:48,327 --> 00:55:51,399 I'm going to have to go reposition that camera. 473 00:55:52,687 --> 00:55:55,520 The youngster continued to cause problems. 474 00:55:55,607 --> 00:55:58,280 He kept on knocking over the camera. 475 00:56:04,207 --> 00:56:08,325 Then two bigger, more experienced bears appeared on the scene, 476 00:56:08,407 --> 00:56:10,318 right in front of Jeff. 477 00:56:16,807 --> 00:56:20,959 But the remote camera was having trouble keeping up with the action. 478 00:56:25,567 --> 00:56:30,277 To discover exactly what was going on, Jeff needed a new perspective. 479 00:56:30,367 --> 00:56:33,325 These bears were so unfazed by his presence 480 00:56:33,407 --> 00:56:35,637 that he decided to stay in the water 481 00:56:35,727 --> 00:56:39,515 and hand-hold the camera on the end of a long pole. 482 00:56:47,647 --> 00:56:52,402 The bears were learning to trust Jeff, allowing him to get even closer. 483 00:56:56,687 --> 00:56:59,440 To get as intimate as this with wild grizzlies 484 00:56:59,527 --> 00:57:01,722 is potentially extremely dangerous 485 00:57:01,807 --> 00:57:05,038 and required all of Jeff's many years of experience. 486 00:57:05,127 --> 00:57:06,606 That was good. 487 00:57:08,847 --> 00:57:12,283 Okay, we've got this other guy coming out too now. 488 00:57:17,927 --> 00:57:21,078 He's gonna check it out. Okay, you can have a look at it. 489 00:57:21,167 --> 00:57:24,762 He was now close enough to observe their technique in detail. 490 00:57:24,847 --> 00:57:27,964 This was something that Jeff had never seen before. 491 00:57:28,047 --> 00:57:30,481 By kicking the salmon into the shallows, 492 00:57:30,567 --> 00:57:34,765 the more experienced bears were able to grab themselves an easy meal. 493 00:57:34,847 --> 00:57:38,806 And by hand-holding the camera, Jeff could follow the action. 494 00:57:45,167 --> 00:57:47,556 Okay, we're getting close here. 495 00:57:48,567 --> 00:57:51,286 He's coming up to you right now. Roll. 496 00:57:52,247 --> 00:57:55,762 To get as close as this to an adult grizzly bear 497 00:57:55,847 --> 00:57:58,122 is truly remarkable. 498 00:57:58,207 --> 00:57:59,879 Jeff makes it look easy, 499 00:57:59,967 --> 00:58:03,437 but it takes years of experience and understanding. 500 00:58:07,927 --> 00:58:12,284 Okay, good show, guys. Thank you. That's it. We're done. 501 00:58:12,647 --> 00:58:14,877 Yep, time to go, that's it. 502 00:58:16,527 --> 00:58:19,997 Jeff had managed to enter the bears' world, giving him 503 00:58:20,087 --> 00:58:24,763 the most intimate shots of grizzlies fishing underwater ever filmed. 504 00:58:24,847 --> 00:58:28,760 He had achieved this not just by using new technology, 505 00:58:28,847 --> 00:58:31,156 but through his own special understanding 506 00:58:31,247 --> 00:58:33,397 of these incredible animals. 507 00:58:34,305 --> 00:58:40,371 Support us and become VIP member to remove all ads from www.OpenSubtitles.org