Adaptation of visual pigment classes to habitat depths and its relation on fish diversity

研究了鲭亚目鱼类视网膜中视锥蛋白基因的表达。澳洲鲭和罗氏沼虾均为远洋性鱼类，具有单一的绿色（RH2）和蓝色（SWS2）视蛋白基因。Sphyraena pinguis比这些物种生活在更上层，复制了RH2和SWS 2的两个基因。带鱼（Trichiuruslepturus）和蛇纹蜥（Gempylusserpens）两种深海鱼类均含有RH2基因，但均未分离到SWS2基因。视杆蛋白（RH1）基因在这两种深海鱼类中均为优势表达类型。

Expressions of cone opsin genes in the retinas of fish species belonging suborder Scombroidei were investigated. Each of Scomber australasicus and Auxis rochei, which are pelagic species, had single green (RH2) and blue (SWS2) opsin gene. Sphyraena pinguis living more upper layer than those species, duplicated both genes of RH2 and SWS2. The two abyssal species of Trichiurus lepturus and Gempylus serpens had RH2 gene, however, SWS2 gene was not isolated from either of them. Rod-opsin (RH1) gene was dominantly expressed class in these two deeper species.