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Age, growth and reproduction of the Caspian roach ( Rutilus rutilus caspicus ) in the Anzali and Gomishan wetlands, North Iran
Author(s) -
Naddafi R.,
Abdoli A.,
Hassanzadeh Kiabi B.,
Mojazi Amiri B.,
Karami M.
Publication year - 2005
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/j.1439-0426.2005.00669.x
Subject(s) - rutilus , biology , fecundity , gonadosomatic index , wetland , reproduction , ecology , cobitidae , zoology , fishery , fish <actinopterygii> , population , demography , sociology
Summary The hypothesis of environmentally related life history variations between two Rutilus rutilus caspicus populations was investigated by comparing Gomishan and Anzali populations along the southern shores of the Caspian Sea. The roach growth rate in the Anzali wetland was higher than in the Gomishan wetland. There were significant differences in growth patterns between males and females from both wetlands, however the sex ratios were not significantly different. Fecundity or reproductive investment (Gonadosomatic index – GSI) of the Gomishan roach was significantly more than the Anzali roach. In both areas the absolute fecundity was significantly positive correlated to age and total length.