Fisheries
M Alizadeh; R Patimar; A Abdoli; M Farhangi; H Adineh
Volume 2, Issue 4 , March 2014, , Pages 15-25
Abstract
This study was conducted to determine regional variation in growth characteristics and age structure of Squalius cephalus (Linnaeus, 1758) in the Southern Caspian Sea basin from April to June 2011. A total of 958 specimens from 3 areas including: Golestan (area 1), Mazandaran (area 2) and Guilan(area ...
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This study was conducted to determine regional variation in growth characteristics and age structure of Squalius cephalus (Linnaeus, 1758) in the Southern Caspian Sea basin from April to June 2011. A total of 958 specimens from 3 areas including: Golestan (area 1), Mazandaran (area 2) and Guilan(area 3) were collected. In southern Caspian basin, the total length and weight of specimens ranged 22.00-30.00 cm and 138.62-347.70 g, respectively.The ages ranged from 0+ to 5+ years for males and from 0+ to 6+ years for females in all sampling areas. Parameters of von Bertalanffy growth function were different between males and females of each area and between the same sexes of different areas. The largest L∞ was found in the area 3 for female (L∞=38.97 cm).According to b values obtained, both sexes (except males of station 1) show a positive allometric growth. The highest values of condition factor were observed for males in early June. The result indicates that higher value of growth rate was for females.
