Age, growth and reproduction period of grass goby (Zosterisessor ophiocephalus Pallas 1811) in the Bay of Izmir (Aegean Sea)


Akyol O.

ARCHIVE OF FISHERY AND MARINE RESEARCH, vol.50, no.2, pp.220-224, 2003 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 50 Issue: 2
  • Publication Date: 2003
  • Title of Journal : ARCHIVE OF FISHERY AND MARINE RESEARCH
  • Page Numbers: pp.220-224

Abstract

Age, growth and reproduction period of the grass goby (Zosterisessor ophiocephalus Pallas 1811) in the Bay of lzmir were studied. The age groups ranged from I to V, and mean total lengths of these age groups were 11.7, 14.3, 16.3, 17.7 and 19.9 cm, respectively. The von-Bertalanffy growth parameters were: L-infinity = 27.4 cm, K = 0.169 year(-1) and t(0) = -2.119 year. Generally, weight increased allometrically and the length-weight relationship estimated for all fish was W = 0.0086 x L-3.06 (R-2 = 0.95). The reproduction period began in February and extended until May according to gonadosomatic index values.