Study of individual fecundity of Tilapia zillii in the Dongjiang River
HE Yao-sheng, LIN Xiao-tao*, SUN Jun, ZHANG Peng-fei
Institute of Hydrobiology, Jinan University; Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Guangzhou 510632, China
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 (Fb) ranged from 1997 to 6369 eggs, with the mean of 4114 eggs. The individual fecundity to standard length (FL) varied from 49 to 83 eggs/mm, with the mean of 62 eggs/mm, and the individual fecundity to body weight (FW) 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=2.186L1.6886 and Fb=0.7243L1.7796, and linear relationships with body weight (W) and weight of eviscerated fish (Wn), e.g., F=50.184W + 3627.3, Fb=25.008W + 1952.2, F=58.783Wn+ 3553.4, and Fb = 28.939Wn +1942.
何耀升, 林小涛*, 孙军, 张鹏飞. 东江外来齐氏罗非鱼个体繁殖力初步研究[J]. , 2013, 32(1): 57-62.
HE Yao-sheng, LIN Xiao-tao*, SUN Jun, ZHANG Peng-fei. Study of individual fecundity of Tilapia zillii in the Dongjiang River. , 2013, 32(1): 57-62.
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