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《Acta Zoologica Sinica》 2008-02
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Biology of the Siamese algae-eater Abbotina rivularis in Panzhihua Reach,Jinshajiang River

ZHOU Can 1,2,ZHU Qian2,CHENG Peng 1,3,XIONG Yu-Yu1,TAN De-Qing 11.Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China2.Marine College,Shandong University at Weihai,Shandong,Weihai 264209,China3.College of Fisheries,Huazhong Agricultural University,Wuhan 430070,China  
This paper deals with the biology of the Siamese algae-eater Abbotina rivularis(Basilewsky)in Panzhihua Reach,Jinshajiang River.Its production of the total catch was 7.68%;the average occurrence in the set gill nets was 93.1%.Body length ranged from 49 mm to 94 mm(mean=66.88±8.11 mm).There was a significant sex difference in lengths of these fish.The curve estimation between the body length and the body weight is W=4×10-5L 2.8499(R2=0.8614).The analysis of age composition indicates 1.22% of the fish are less than 1 year old,82.93% of the fish are 1 year old and 15.85% of the fish are 2 years old.The correlation between the scale radius and the body length is significant and the males have a stronger linear regression relationship than females.The reproductive period starts at the end of March.Absolute fecundity ranged from 737 to 4516(eggs)with the mean value 1744±753(eggs);and its relative fecundity ranged from 180 to 597(eggs/body weight)with the mean value 295±87(eggs/body weight).Egg diameters ranged from 0.28 mm to 1.24 mm,with a mean value 0.75±0.25 mm.The distribution has two peaks.Based on our observations we conclude that Abbotina rivularis is a single spawner.
【Fund】: 国务院三峡工程建设委员会办公室生态环境项目(No.SX2006-013);; 长江上游珍稀、特有鱼类及保护区措施补偿科研项目(No.0605042-07);; 国家自然科学基金委员会、二滩水利开发有限责任公司雅砻江水电开发联合研究资金项目(No.50679095)资助~~
【CateGory Index】: Q958
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