Age, growth and reproductive characteristics of round scad Decapterus maruadsi in the waters off west Kyushu, the east China Sea期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Age, growth and reproductive characteristics of round scad Decapterus maruadsi in the waters off west Kyushu, the east China Sea

Authors:	Seiji Ohshimo Mari Yoda Nobuaki Itasaka Norimasa Morinaga Toshio Ichimaru

Institution:	Seikai National Fisheries Research Institute, Fishereies Research Agency, Nagasaki 851-2213,;Kagoshima Prefectural Fisheries Technology and Development Center, Ibusuki 891-0315, and;Nagasaki Prefectural Institute of Fisheries, Nagasaki 851-2213, Japan

Abstract:	ABSTRACT: The purpose of this study was to determine the growth and reproductive characteristics of round scad Decapterus maruadsi in the East China Sea. The characteristics regarding growth and reproduction of round scad based on otolith reading and gonad histology, respectively, were estimated. The von Bertalanffy's growth model for round scad was estimated as follows: FL _t = 3421 ? exp{?0.55( t + 0.58)}], (1 < t < 7) where FL_t is fork length (mm) at age in years t . The maturation stage of the ovary was observed by histological techniques. June was the main spawning period; the maturation and migratory nucleus stage of the oocyte was observed when the gonad somatic index value was approximately greater than 4.

Keywords:	Decapterus maruadsi growth reproduction round scad
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