科学家首次发现白色成年逆戟鲸-凯发k8官网

科学家首次发现白色成年逆戟鲸
文章来源:未知 文章作者:enread 发布时间:2012-04-23 07:17 字体: [ ] 
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scientists have made what they believe to be the first sighting of an adult white orca, or 1 whale.

科学家首次发现一只成年白色逆戟鲸,又称杀人鲸。

iceberg2\ is believed to be the first mature white orca observed" src="http://www.enread.com/upimg/allimg/120423/1_120423072117_1.jpg" width="624" height="232" />
"iceberg" is believed to be the first mature white orca observed
the adult male, which they have nicknamed iceberg, was 3 off the coast of kamchatka in eastern russia.

it appears to be healthy and leading a normal life in its pod.

white whales of various species are occasionally seen; but the only known white orcas have been young, including one with a rare 4 condition that died in a canadian 5 in 1972.

the sightings were made during a research cruise off kamchatka by a group of russian scientists and students, co-led by erich hoyt, the long-time orca scientist, conservationist and author who is now a senior research fellow with the whale and dolphin conservation society (wdcs).

"we've seen another two white orcas in russia but they've been young, whereas this is the first time we've seen a mature adult," he told bbc news.

"it has the full two-metre-high 6 7(背鳍) of a mature male, which means it's at least 16 years old - in fact the fin is somewhat 8, so it might be a bit older."

orcas mature around the age of 15, and males can live to 50 or 60 years old, though 30 is more commonplace.

"iceberg seems to be 9 socialised; we know that these fish-eating orcas stay with their mothers for life, and as far as we can see he's right behind his mother with presumably his brothers next to him," said dr hoyt.

the cause of his unusual pigmentation(染色) is not known. the captive white orca, chima, suffered from chediak-higashi 10, a genetic condition that causes partial albinism as well as a number of medical complications.

it is possible that an attempt may be made to take a biopsy from iceberg; but with researchers reluctant to do so unless there is a compelling conservation reason, they are hoping instead for closer observations including a detection of eye colour.

the project dr hoyt co-leads, the far east russia orca project, has pioneered visual and 11 monitoring in the inhospitable kamchatka seas, and has produced a number of papers on the communication of killer whales.

this may lead to improved understanding of the animals' complex social structure, which includes matrilineal family 12, pods consisting of several families, and much larger "super-pods".

a related project aims to study and 13 habitat for all whales and dolphins around the russian coast.

in recent years a white humpback whale nick-named migaloo has 14 intense interest in australia, while the arctic beluga(白鲸) is naturally white.

the most famous white whale, though, is the 15 16 whale that drove captain ahab to his eventually fatal fury in moby dick.



点击收听单词发音收听单词发音  

1 rplzik     
n.杀人者,杀人犯,杀手,屠杀者
参考例句:
  • heart attacks have become britain's no.1 killer disease.心脏病已成为英国的头号致命疾病。
  • the bulk of the evidence points to him as her killer.大量证据证明是他杀死她的。
2 cbkx0     
n.冰山,流冰,冷冰冰的人
参考例句:
  • the ship hit an iceberg and went under.船撞上一座冰山而沉没了。
  • the glacier calved a large iceberg.冰河崩解而形成一个大冰山。
3 7feyj     
adj.有斑点的,斑纹的,弄污了的
参考例句:
  • the milkman selected the spotted cows,from among a herd of two hundred.牛奶商从一群200头牛中选出有斑点的牛。
  • sam's shop stocks short spotted socks.山姆的商店屯积了有斑点的短袜。
4 pgixp     
adj.遗传的,遗传学的
参考例句:
  • it's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
  • each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。
5 gvszl     
n.水族馆,养鱼池,玻璃缸
参考例句:
  • the first time i saw seals was in an aquarium.我第一次看见海豹是在水族馆里。
  • i'm going to the aquarium with my parents this sunday.这个星期天,我要和父母一起到水族馆去。
6 rmeyc     
adj.背部的,背脊的
参考例句:
  • his dorsal fin was down and his huge pectorals were spread wide.它的脊鳍朝下耷拉着,巨大的胸鳍大张着。
  • the shark's dorsal fin was cut off by the fisherman.鲨鱼的背鳍被渔夫割了下来。
7 qkexo     
n.鳍;(飞机的)安定翼
参考例句:
  • they swim using a small fin on their back.它们用背上的小鳍游动。
  • the aircraft has a long tail fin.那架飞机有一个长长的尾翼。
8 kc0y8     
adj.衣衫褴褛的,粗糙的,刺耳的
参考例句:
  • a ragged shout went up from the small crowd.这一小群人发出了刺耳的喊叫。
  • ragged clothing infers poverty.破衣烂衫意味着贫穷。
9 gfuzd     
adv.完全地,全部地,彻底地;充分地
参考例句:
  • the doctor asked me to breathe in,then to breathe out fully.医生让我先吸气,然后全部呼出。
  • they soon became fully integrated into the local community.他们很快就完全融入了当地人的圈子。
10 uqbwu     
n.综合病症;并存特性
参考例句:
  • the institute says that an unidentified virus is to blame for the syndrome. 该研究所表示,引起这种综合症的是一种尚未确认的病毒。
  • results indicated that 11 fetuses had down syndrome. 结果表明有11个胎儿患有唐氏综合征。
11 kj7y8     
adj.听觉的,声音的;(乐器)原声的
参考例句:
  • the hall has a fine acoustic.这个大厅的传音效果很好。
  • animals use a whole rang of acoustic, visual,and chemical signals in their systems of communication.动物利用各种各样的听觉、视觉和化学信号来进行交流。
12 107c1b7606090bbd951aa9bdcf1d209e     
宗族( clan的名词复数 ); 氏族; 庞大的家族; 宗派
参考例句:
  • there are many clans in european countries. 欧洲国家有很多党派。
  • the women were the great power among the clans [gentes], as everywhere else. 妇女在克兰〈氏族〉里,乃至一般在任何地方,都有很大的势力。 来自英汉非文学 - 家庭、私有制和国家的起源
13 vyryp     
vt.保存,保护,节约,节省,守恒,不灭
参考例句:
  • he writes on both sides of the sheet to conserve paper.他在纸张的两面都写字以节省用纸。
  • conserve your energy,you'll need it!保存你的精力,你会用得着的!
14 muxzii     
v.拖,拉,拔出;adj.憔悴的,紧张的
参考例句:
  • all the characters in the story are drawn from life.故事中的所有人物都取材于生活。
  • her gaze was drawn irresistibly to the scene outside.她的目光禁不住被外面的风景所吸引。
15 ckex0     
adj.小说的,虚构的
参考例句:
  • the names of the shops are entirely fictional.那些商店的名字完全是虚构的。
  • the two authors represent the opposite poles of fictional genius.这两位作者代表了天才小说家两个极端。
16 jfozo     
n.精子,精液
参考例句:
  • only one sperm fertilises an egg.只有一个精子使卵子受精。
  • in human reproduction,one female egg is usually fertilized by one sperm.在人体生殖过程中,一个精子使一个卵子受精。
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