This was accomplished by making male or female presentation contingent upon an operant ring swimming response in single- (Experiment 1) and two-choice (Experiment 2) continuous reinforcement operant situations for 1 hr per day. It was found that visual exposure to a female stimulus was ...
Inhibitory control is a way to infer cognitive flexibility in animals by inhibiting a behavioral propensity to obtain a reward. Here we tested whether there are differences in inhibitory control between females and males of the fish Nile tilapia owing to their distinct reproductive roles. Individuals...
In both male-first (protandrous) and female-first (protogynous) species, the “size advantage hypothesis” appears to explain the change: for some fish it is advantageous to be of a different sex once it has reached a certain size. In protogynous fish like the kobudai, where one domina...
aMale and female fish are hard to tell. 马累和母鱼是坚硬知道。[translate]
a发货的公司 Delivers goods company[translate] ashipping companies 运输公司[translate] aガソリンタンク 正在翻译,请等待...[translate] aboendeform 适应模子[translate] amale and female fish are hard to tell apart 雄性和雌鱼很难区分[translate]...
Within six months of being paired with another male, the dominant fish had grown its preoptic area to a size that made it indistinguishable from the same region in other female anemonefish brains. "After six months, this part of the brain is completely changed from a male brain to a female...
Genetic determination of sex in fish can involve monogenic or polygenic systems, with factors located on the autosomes or on sex chromosomes. In the latter case, both male (XY) and female (ZW) heterogametic systems have been described, as well as many subtle variations on these themes. Sex...
Channel catfish Ictalurus punctatus have an XX female-XY male genotypic system of sex determination, and male channel catfish grow faster than females. Through selective breeding and appropriately timed hormone administration, we have produced phenotypic male channel catfish with a YY sex genotype and...
Fourteen pairs of white fish of the species, Oryzias latipes, competed once daily to mate with one female. Each pair consisted of a super-male (YY) and an ordinary male (XY). The YY males were responsible for 88 per cent of 155 spawnings, the XY males for 12 per cent ( P = 0·...
Male and female fish are hard to tell 青云英语翻译 请在下面的文本框内输入文字,然后点击开始翻译按钮进行翻译,如果您看不到结果,请重新翻译! 翻译结果1翻译结果2翻译结果3翻译结果4翻译结果5 翻译结果1复制译文编辑译文朗读译文返回顶部 男性和女性的鱼都分不清...