文章摘要
陈永乐,陈奋昌,钟海浪.西江鲮鱼年龄与生长的研究[J].水产学报,1990,14(3):198~205
西江鲮鱼年龄与生长的研究
AGE AND GROWTH OF MUD CARP (CIRRHINA MOLITORELLA) IN XIJIANG BRANCH OF PEARL RIVER
投稿时间:1989-06-01  修订日期:1990-02-01
DOI:
中文关键词: 西江  鲮鱼  年龄  生长
英文关键词: Xijiang River  mud carp  age  growth
基金项目:
作者单位
陈永乐 珠江水产研究所 广州 
陈奋昌 珠江水产研究所 广州 
钟海浪 珠江水产研究所 广州 
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中文摘要:
      鲮鱼鳞片可作为年龄鉴定的依据。鳞片新年轮逐月出现率的变化,表明年轮形成主要在3~10月份。计算出鳞片与体长,体长与体重的关系式。3龄以前属于幼鱼生长阶段,体长和体重的相对增长率较大;3 龄以后则进入成鱼生长阶段。其生长适合于 von Berta-lanffy 生长方程,体重生长曲线拐点位于 15.55龄,应属衰老拐点。其生长速度和加速度曲线能反映生长过程的变化特点。渔获物组成以性未成熟个体为主。限制捕捞3~+龄以下的个体,有利于渔获量稳定和扩大繁殖群体。
英文摘要:
      The scales were used for age determination of mud carp. The mate-rials were collected in Xijiang River from Wuzhou to Guiping in April 1984 to March 1986. It was found that new annual ring began to appear mostly from March to October. The fish matured at 3 years old and the growth rate decreased after matu-ration.The length-weight relationship formula was calculated to be W=1 .1825x10-5L3.1457 and the relationship between the scale length and standard length was expressed to be R=0.01915L-0.005, where W, L and R represent body weight,standard length and scale lenght respectively. The growth of the mud carp in Xi-jiang River corresponds to von Bertalanffy's growth equation:Wt=29504.87(1一e-o.o7(t-1.1429) )3.Lt=971.14(1一e-0.07(t-0.1429)).here Wt is body weight in grams at the age of t, and Lt is standard Length in mm at the age of t.For conservation and enhancement of the breeding population, it is necessary to regulate that the minimum legal harvestable age of this fish should be 3 years old, and size of 250 mm in length and 430 grams in weight.
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