东江外来齐氏罗非鱼个体繁殖力初步研究

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Abstract

The specimens of Tilapia zillii for individual fecundity study were collected every month from January 2011 to December 20011 in the Dongjiang River. It was found that T. zillii was a multiple spawner and the breeding seasons were from early May to the end of October. The sizes of mature eggs in females were from 1.20 to 1.90 mm. Absolute fecundity(F)ranged from 4913 to 13129 eggs, with the mean of 7991 eggs. Eggs produced in one spawning (F_b) ranged from 1997 to 6369 eggs, with the mean of 4114 eggs. The individual fecundity to standard length (F_L) varied from 49 to 83 eggs/mm, with the mean of 62 eggs/mm, and the individual fecundity to body weight (F_W) varied from 66 to 154 eggs/g, with the mean of 98 eggs/g. Fecundity showed curvilinear relationships with standard length (L), e.g., F=2.186L^1.6886 and F_b=0.7243L^1.7796, and linear relationships with body weight (W) and weight of eviscerated fish (W_n), e.g., F=50.184W + 3627.3, F_b=25.008W + 1952.2, F=58.783W_n+ 3553.4, and F_b= 28.939W_n +1942.

Key words： Tilapia zillii spawning type egg diameter individual fecundity Dongjiang River

Received: 25 February 2013

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	Articles by authors
	HE Yao-sheng
	LIN Xiao-tao
	SUN Jun
	ZHANG Peng-fei

Cite this article:

HE Yao-sheng,LIN Xiao-tao,SUN Jun, et al. Study of individual fecundity of Tilapia zillii in the Dongjiang River[J]. , 2013, 32(1): 57-62.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2013/V32/I1/57

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