摘要
研究了河川沙塘鳢的年轮特征、生长特性、繁殖和摄食习性。观察比较了耳石、鳞片、脊椎骨和胸鳍支鳍骨的年轮特征，选取耳石作为鉴定年龄的依据。渔获物有０～Ⅳ龄五个年龄组，其中Ⅰ和Ⅱ龄组占渔获量的８５％，Ⅳ龄组仅为１．０２％。体长与耳石半径呈直线相关。体长与体重（Ｗ）和纯体重（Ｗ′）均呈指数函数增长关系，Ｗ＝２．２４１６×１０－２Ｌ３．０８６７；Ｗ′＝２．４９８×１０－２Ｌ２．９７４７。卵巢发育分Ⅵ期及重复发育的Ⅳ′和Ⅴ′期，属分批非同步型产卵鱼类，产卵时间为３～６月，盛产期为４～５月，繁殖期间至少产两次卵。
A detailed research is reported in this paper on the biology of age,growth,feeding habit,reproduction of Odontobutis potamphila (Günther). The otolith is the best indicator in age determination,with vertebra and scale as reference. The pectoral radial bone is not reliable in age determination.Of all the aquatic catches the age Ⅰ and Ⅱ contributed 85% of the total number in five year groups from 0 to Ⅳ. The radius of otolith and body length are in a significant linear correlation,which can be described by the following equation:L=5.313 3R-0.069 03. The relationship between body length and body weight(W) and net weight(W′) can be described by the following equation: W=0.022 416L 3.086 7 ;W′=0.024 98L 2.974 7 . The fish mainly feeds on juvenile fish and shrimps, but on less amount of molluscs and insects. The course of ovarian maturation can be divided into six stages and Ⅵ～Ⅵ′ or Ⅵ stage. The fish releases two batches at least in a breeding season. The breeding season is between March and June. The nest preferences are widely given to many kinds of substances,such as grass root,title,some and other materials. The egg mass can be found on the top or side of the nest. The individual absolute fecundity ranges from 2 645～7 708 eggs and individual relative ranges from 56～163 eggs.
出处
《水产学报》
CAS
CSCD
北大核心
1996年第3期193-202,共10页
Journal of Fisheries of China
关键词
河川沙塘鳢
生物学
太湖
Odontobutis potamophila,Biology,Taihu Lake
