| 翻訳と辞書 |
| California sheephead ： ウィキペディア英語版 |
California sheephead
The California sheephead, ''Semicossyphus pulcher'', is a species of wrasse native to the eastern Pacific Ocean. Its range is from Monterey Bay, California, to the Gulf of California, Mexico. This species can live for up to 20 years in favorable conditions and can reach a size of up to and a weight of .〔 They are carnivorous, living in rocky reef and kelp bed habitats, feeding primarily on sea urchins, molluscs, and crustaceans.
All California sheephead are born female and morph into their male form at various stages in their lifecycle, determined by environmental conditions and pressures. Because of this, they are considered to be protogynous hermaphrodites which have planktonic larvae. Their coral and kelp-heavy habitat provides protection from predators, which is important as this species is diurnal, foraging during the day and seeking shelter at night.
The California sheephead is considered vulnerable due to high fishing rates off of the coast of southern California. Since fisheries tend to remove the largest fish, they end up removing the males. This skews the male-to-female ratio and affects the fishes' lifecycle, which can negatively impact populations.
== Description ==
Male and female California sheepsheads have different color patterns and body shapes.〔 Males are larger, with black tail and head sections, wide, reddish orange midriffs, red eyes, and fleshy forehead bumps. Female sheephead are dull pink with white undersides.〔 Both sexes have white chins and large, protruding canine teeth that can pry hard-shelled animals from rocks.〔 After powerful jaws and sharp teeth crush the prey, modified throat bones (a throat plate) grind the shells into small pieces.〔 California sheephead can reach a size of and a weight of .〔 All sheepheads are born as females and eventually change to males at roughly .〔 The age of the transition depends on environmental factors such as food supply.〔 When supplied with a large amount of food, the California sheephead can live for up to 21 years. If food is scarce, they can live up to 9 years.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「California sheephead」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|