Trends in Biosciences
  • Year: 2013
  • Volume: 6
  • Issue: 5

Maturation and Spawning of the Threadfin Bream Nemipterus japonicus (Bloch) along Mangalore Coast

  • Author:
  • D.P. Rajesh, S. Benakappa, H.N. Anjanayappa, S.R. Somashekara, A.S. Kumar Naik, Jitendra Kumar
  • Total Page Count: 5
  • Page Number: 617 to 621

Dept. of Fisheries Resources and Management, Karnataka Veterinary, Animal and Fisheries Sciences University, College of Fisheries, Mangalore-575002

*Email: jitenderanduat@gmail.com

Abstract

Maturation studies carried out on Nemipterus japonicus samples collected from commercial landings from March-2009 to February-2010 showed the male: female ratio was 1:0.90 and revealed by ova-diameter polygon, spawning occurrence from September to May with a peak in between September toNovember. This also supported by higher values of GIS and relative condition factor during these months fecundity varied from 10,472 to 65,225 eggs. The minimum size at sexual maturity was at 165 mm and 175 mm (TL) male and female respectively. The logarithm relationships between fecundity, total length, body weight and ovary weight have also beencalculated.

Keywords

Nemipterus japonicus, Maturation, Spawning, Mangalore coast