SKUAST Journal of Research

Open Access
  • Year: 2012
  • Volume: 14
  • Issue: 1and2

Age, Growth and Mortality Characteristics of Lethrinus nebulosus (Forsskal, 1775) in Thoothukudi Coast of Tamilnadu, India

  • Author:
  • M. Vasantharajan, P. Jawahar, T. Francis, M. Venkatasamy, S. Santhoshkumar
  • Total Page Count: 8
  • DOI:
  • Page Number: 9 to 16

Department of Fisheries Biology and Resource Management, Fisheries College and Research Institute, Tamil Nadu Fisheries University, Thoothukudi – 628 008, Tamilnadu, India

Abstract

The major lethrinid species available along Thoothukudi coast (Tamilnadu) are Lethrinus lentjan, L. nebulosus, L. ornatus, L. elongatus, L. microdon, L. mahsena, L. harak, L. ramak. L. conchyliatus, L. rubiroperculatus, Gymnocranius robinsonii and G. griseus. The study on maximum sustainable yield indicated that L. nebulosus is underexploited. The L∞, K and t0 value of L. nebulous were 79.9, 0.35 and -0.66, respectively. The K value of L. nebulous was relatively higher inferring slow growth rate of this tropical demersal fish species. The estimated total instantaneous mortality and fishing mortality of L. nebulous were 1.15 and 0.62, respectively. Recruitment of L. nebulosus was recorded throughout in the year, with two peaks in April and August.

Keywords

Growth, Lethrinids, Lethrinus nebulosus, mortality