An Investigation on reproducation stages of Perca fluviatilis in Anzali Lagoon

Subject Areas : Marine Biology

A. Ashja Ardalan ¹ (Faculty of Marine Science and Technology, Islamic Azad University, North Tehran Branch)
A. Vosooghi ² (Faculty of Marine Science and Technology, Islamic Azad University, North Tehran Branch)
L. Sadegh ³ (Faculty of Marine Science and Technology, Islamic Azad University, North Tehran Branch)

Received: 2010-04-23 Accepted : 2010-10-11 Published : 2010-12-21

Keywords: Reproduction, Anzali lagoon, maturation, Perca fluviatilis, perch,

Abstract :

This study was carried out in the Anzali Lagoon From 2007 to 2008 on Perca fluviatilis (Percidae). The sampling was monthly and samples were collected by Gillnet. 254 specimens of perca fluviatilis were caught. The measured parameters were: Tl, Fl. body weight, sex, gonad weight and egg diameter. Mean Fork length and body weight for males & females were 188 .4 mm, 116078gr respectively. In this study, 7 maturation stages were recognized; the most samples were at first stage (39.4%). We could recognize sexuality in 251 specimens. Males were %37 percent and females % 63 percent of the catch. The sex – ratio was, F: M = 1.7:1. The range of egg diameter was measured 14 to 42.25  , and the average of egg diameter has been 28.3±8.19 . The absolute Fecundity was estimated to be 35942.93 eggs.