International Journal of Fisheries and Aquatic Studies
2017, Vol. 5, Issue 2, Part D
Observations on the food preferences, growth parameters and biological aspects of Coryphaena hippurus Linnaeus, 1758 exploited through the longline survey operations along the West coast of IndiaAuthor(s):
Vinod Kumar M, Farejiya M K, Kiran S Mali, Sahu KC and Rahulkumar TailorAbstract: Coryphaena hippurus
exploited through the longline survey operations during the period 2005-2015 were analysed the data in the present study. Occurrence of this species reported in the oceanic waters of West coast of India in the depth range 1000-4000m during tuna longline operations in the coast. The size range (fork length) of the species was between 25 cm and 135 cm with an average length of 92 cm. The frequency occurrence of food and preference of food by area and season were identified in the order of preference as fin-fishes (60%), crustaceans (20%) and cephalopods (11%). Length-wise, area-wise, sex-wise and season-wise food preferences were presented. The growth parameters estimated in the study were asymptotic length (L∞) 135cm, growth coefficient (K) 0.35cm/year and initial condition parameter (t0) -0.124.The natural mortality (M) value recorded in the study was 0.57 and the total mortality (Z) was 0.95. Size at first maturity observed as 35 cm. Sex ratio observed as 1.12:1. Maximum contribution of matured females reported in the month of July and November. Two peak spawning seasons were observed during May-August with a maximum in July and the other from October-January with a highest in November.Pages: 240-248 | 658 Views 23 DownloadsDownload Full Article:
How to cite this article:
Vinod Kumar M, Farejiya M K, Kiran S Mali, Sahu KC and Rahulkumar Tailor. Observations on the food preferences, growth parameters and biological aspects of Coryphaena hippurus Linnaeus, 1758 exploited through the longline survey operations along the West coast of India. International Journal of Fisheries and Aquatic Studies. 2017; 5(2): 240-248.