Age and growth of stargazer (Uranoscopus scaber L., 1758) in the southeastern Black Sea


DEMIRHAN S. A. , CAN M. F. , Seyhan K.

JOURNAL OF APPLIED ICHTHYOLOGY, vol.23, no.6, pp.692-694, 2007 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 6
  • Publication Date: 2007
  • Doi Number: 10.1111/j.1439-0426.2007.00863.x
  • Title of Journal : JOURNAL OF APPLIED ICHTHYOLOGY
  • Page Numbers: pp.692-694

Abstract

A sample of 346 Uranoscopus scaber (L., 1758) was collected from the southeastern Black Sea between January 2002 and May 2005 in order to provide information on age, growth, length-weight relationship, and stomach contents of this species. Total length and total weight of sampled fish ranged from 5.2 to 21.9 cm and from 2.0 to 182.5 g, respectively. The sex ratio (1 : 1.98) was biased toward females (P < 0.05). Isometric growth was determined in the population. Length-weight relationships for all individuals were described by the parameters: a = 0.0167, b = 3.00, with the r(2) = 0.99. The population was composed of five age-classes (I-V years). The von Bertalanffy growth parameters (+/- SE) and confidence limit (CL, 95%) for the entire population were: L-infinity = 26.31 +/- 0.838 cm (CL: 24.66-27.96), k = 0.339 +/- 0.023 1/year (CL: 0.294-0.385), and t(o) = 0.087 +/- 0.0346 year (CL: 0.019-0.155) (r(2) = 0.96). Growth performance index (Phi) was 2.37. The diet was composed of Gobius sp. (2.2%),Trachurus trachurus (2.1%), Merlangius merlangus euxinus (4.3%) and unidentified fish species (17.4%); 39.1% were unidentified remains.