Hamanako Branch, Shizuoka Prefectural Research Institute of Fishery, Hamamatsu, Shizuoka 431-0214, Japan.
J Fish Biol. 2013 Sep;83(3):588-97. doi: 10.1111/jfb.12197. Epub 2013 Aug 12.
To assess the relationship between growth rate of body mass and sex in the Japanese eel Anguilla japonica in the early life stage; the growth rates of males and females were compared under experimental conditions. The mean growth rate of females was significantly slower than that of males. To assess the relative priority of growth rate and sex, growth was delayed by restricted feeding, resulting in a significantly higher proportion of females in the delayed than in the normal growth group. These findings indicate that the mean growth rate of A. japonica is slower in females than in males in the early life stage around sex determination and differentiation under experimental rearing conditions. Moreover, growth rate probably has priority over sex determination, with slow growth rate increasing the probability of being female.
为了评估日本鳗鲡早期生活阶段体重增长率与性别的关系；在实验条件下比较了雌雄个体的生长率。雌性的平均生长率明显慢于雄性。为了评估生长率和性别的相对优先性，通过限制饲养来延迟生长，导致延迟生长组中雌性的比例明显高于正常生长组。这些发现表明，在实验饲养条件下，性决定和分化前后的早期生命阶段，日本鳗鲡的雌性平均生长率比雄性慢。此外，生长率可能优先于性决定，生长缓慢增加了成为雌性的概率。
