Age and growth rates at the early life stages of common pandora (pagellus erythrinus) based on analysis of otolith microstructure


AYYILDIZ H. , ALTIN A.

FISHERY BULLETIN, cilt.116, ss.183-189, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 116 Konu: 2
  • Basım Tarihi: 2018
  • Doi Numarası: 10.7755/fb.116.2.7
  • Dergi Adı: FISHERY BULLETIN
  • Sayfa Sayıları: ss.183-189

Özet

We investigated young-of-the-year (YOY) growth, age, and hatching distributions of common pandora (Pagellus erythrinus) by analyzing otolith microstructure. This study was carried out in shallow waters (0-20 m) off the island of Gokceada, Turkey, from June 2013 through June 2014. A total of 231 YOY common pandora were measured and aged. These fish ranged from 12 to 110 mm in total length and from 38 through 242 d in age. The indices for determining variability in daily age estimates (average percentage error and coefficient of variation) were 4.9% and 3.4%, respectively. Average daily growth rate was calculated from a linear regression of the age-length data set as 0.52 mm/d. A linear relationship was found between otolith morphometric measurements (otolith length, width, and radius) and total length for YOY common pandora. The hatching times of common pandora were back-calculated to occur from February through October, and 2 main hatching cohorts were evident in spring (March) and summer (August).