Indagate biometry and gonado somatic index in male perch Perca fluviatilis Linnaeus, 1758)in Lahijan Amirkelayeh Wetland
Subject Areas :Mohammad Vafajo Dyanati 1 , Hossein Khara 2 , Ali Bani 3 , Rezvanollah Khazemi 4 , Maryam Saemi 5
1 - دانشگاه آزاد اسلامی واحد لاهیجان، دانشکده منابع طبیعی، گروه شیلات، لاهیجان. ایران
2 - دانشگاه آزاد اسلامی واحد لاهیجان، دانشکده منابع طبیعی، گروه شیلات، لاهیجان. ایران
3 - دانشگاه گیلان، دانشکده منابع طبیعی، گروه شیلات، صومعه سرا. ایران.
4 - انستیتو بین المللی ماهیان خاویاری دکتردادمان، رشت. ایران.
5 - دانشگاه آزاد اسلامی واحد لاهیجان، دانشکده منابع طبیعی، گروه شیلات، لاهیجان. ایران
Keywords: Perca fluviatilis, Amirkelayeh Wetland, gonadosomatic index, Biometry,
Abstract :
Inroduction and Objective: Perch (Percafluviatilis Linnaeus) is from Percidae and one of the valuable fishes in terms of ecological and economical and have limited habitat in iran, stands for the highest stocks in Amirkelayeh and Anzali wetlands, there lived a groupmature at age 2-3.Materials and Methods:The studies of biometry and gonadosomatic index are the important indicators of reproduction biology in fishes. The present study was conducted in November 2011and December,January, Februaryand March 2011 in Amirkelayeh wetland and 126 specimens caught by gillnet while they were 2,3,4,5 years old, respectively.Results: In Lahijan Amirkelayeh wetland to investigate gonadosomatic index and biometry in this male species. According to the results obtained highest average total length (22.5 cm), fork length (21.5 cm), standard length (19 . 5 cm), body weight (158 g) and gonad weight (7.15 g) of 5 year old fish and the lowest average total length (13 cm), fork length (12.5 cm), standard length (11 cm), body weight (28.7 g) and gonad weight (1.82 g) belonged to 2 year old fish. There was significant different in mean of total length, fork length, standard length, body weight and gonad weight among differente group of age (P 0.05).
