COMPARISON OF BIOLOGICAL FACTORS OF APHANIUS SOPHIAE IN CHESHMEH-ALI OF DAMGHAN AND SHOUR RIVER OF ESHTEHARD

Document Type : Research Paper

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Abstract

Length, age frequency, von Bertalanfi growth parameter, reproduction and absolute fecundity of two populations of killifish (Aphanius sophiae) from Cheshmeh-Ali of Damghan and Shour River of Eshtehard were studied monthly from October 2004 to November 2005. There was no significant difference between sex ratios of the two populations (X2=0.679, P=0.410). Age and length frequencies revealed that female fish of Cheshmeh-Ali were taller and longer-lived than those of Shour River. Maximum of Gonadosomatic index of Cheshmeh- Ali fish was in May while in the case of Shour River, it was in April. The absolute fecundity showed no significant difference using ANCOV A whereas egg diameter of Cheshmeh-Ali population was significantly bigger than Shour River population (P<0.001).

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Iranian Scientific Fisheries Journal
Volume 16, Issue 3
January and February 2008
Pages 113-122

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