Seasonal distribution, age, growth, and reproductive biology of marbled sole Pleuronectes yokohamae in Tokyo Bay, Japan
Seasonal distribution, age, growth, and reproductive biology of marbled sole Pleuronectes yokohamae in Tokyo Bay, Japan
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日本东京湾横滨侧鳎的季节分布、年龄、生长和繁殖生物学
DOI：
10.1111/j.1444-2906.2006.01150.x
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发表时间：
2006
影响因子：
1.9
通讯作者：
M. Shimizu
中科院分区：
文献类型：
--
作者：
G. Kume;T. Horiguchi;Akihiro Goto;H. Shiraishi;Y. Shibata;M. Morita;M. Shimizu
研究了日本东京湾纹鲽Pleuronectes yokohamae（Günther）的季节分布、年龄、生长和繁殖生物学。横滨对虾的季节分布趋势明显，夏季主要分布在湾南部，其他季节则几乎遍布整个湾。海湾低氧区的形成和动态限制了横钩原甲夏季向北的分布。年龄是通过计算耳石上的年轮来确定的;最大年龄为男性5岁，女性6岁。在每个估计年龄，女性的平均反算长度大于男性。雄性和雌性的生长由von Bertalanffy生长方程表示。根据性腺指数和性腺组织学切片，研究了其生殖生物学。产卵季节从11月持续到次年3月，在12月和1月达到高峰。60%的1岁雄性和所有≥2岁雄性具有成熟睾丸，而6.7%的1岁雌性、58.3%的2岁雌性和所有≥3岁雌性已达到成熟。
The seasonal distribution, age, growth and reproductive biology of marbled sole Pleuronectes yokohamae (Günther) from Tokyo Bay, Japan were studied. A clear seasonal distribution trend was observed, with P. yokohamae limited to the south of the bay in summer and expanding almost throughout the bay in other seasons. The formation and dynamics of hypoxic areas in the bay limited the northward distribution of P. yokohamae in summer. Age was determined by counting growth rings on otoliths; maximum ages were found to be 5 years for males and 6 years for females. The mean back-calculated length for females at each estimated age was greater than that for males. Growth of males and females was shown by the von Bertalanffy growth equations. Reproductive biology was studied on the basis of gonadosomatic indices and histological sections of gonads. The spawning season lasted from November to March, peaking in December and January. Sixty per cent of males at 1 year and all males ≥2 years had mature testes, whereas 6.7% of females at 1 year, 58.3% of females at 2 years, and all females ≥3 years had attained maturity.