| 翻訳と辞書 |
| Onykia ingens ： ウィキペディア英語版 |
Onykia ingens
''Onykia ingens'', the greater hooked squid, is a species of squid in the family Onychoteuthidae. It occurs worldwide in subantarctic oceans.
Although ''O. ingens'' was long attributed to the genus ''Moroteuthis'', several authors have recently agreed that ''Moroteuthis'' is a junior synonym of ''Onykia.''〔Bolstad, K.S.R. 2010. Systematics of the Onychoteuthidae Gray, 1847 (Cephalopoda: Oegopsida). ''Zootaxa'' 2696: 1–186. (Preview )〕
==Size and growth==
The size of a fully grown ''O. ingens'', inclusive of tentacles, is currently unknown. Many estimates, however, predict that the mantle may reach lengths of up to 94 cm (37 in). Research has found that egg sizes of the squid average 2.1 mm inside mature females, while juveniles average 4.6 mm or larger. Juveniles are presumed to live near the surface, until they reach a mantle length of approximately 200 mm, at which time they relocate to deeper water, and larger prey. ''O. ingens'' exhibit sexual dimorphism, with females growing linearly twice as fast as males, and reaching a fully mature size of more than five times that of male counterparts.〔Bolstad, K. 2003. (Spotlight on: ''Moroteuthis ingens'' ). The Octopus News Magazine Online.〕
Penis elongation has been observed in this species; when erect, the penis may be as long as the mantle, head and arms combined.〔Arkhipkin, A.I. & V.V. Laptikhovsky 2010. Observation of penis elongation in ''Onykia ingens'': implications for spermatophore transfer in deep-water squid. ''Journal Molluscan Studies'', published online on June 30, 2010. 〕〔Walker, M. 2010. (Super squid sex organ discovered ). ''BBC Earth News'', July 7, 2010.〕 As such, deep water squid like ''M. ingens'' have the greatest known penis length relative to body size of all mobile animals, second in the entire animal kingdom only to certain sessile barnacles.〔
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「Onykia ingens」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.
|
|