Sudden emergence of fishery and some aspects of biology and population dynamics of Aluterus monoceros (Linnaeus, 1758) at Veraval

Ghosh, Shubhadeep and Thangavelu, R and Mohamed, Gulshad and Dhokia, H K and Zala, M S and Savaria, Y D and Polara, J P and Ladani, A A (2011) Sudden emergence of fishery and some aspects of biology and population dynamics of Aluterus monoceros (Linnaeus, 1758) at Veraval. Indian Journal of Fisheries, 58 (1). pp. 31-34.

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Abstract

The sudden emergence of a fishery and selected aspects of biology and population dynamics of Aluterus monoceros landed by trawlers at Veraval was studied from January 2008 to December 2009. Total catch of 475 t recorded in September 2009, which increased to 7042 t in October dominated in the trawl landings with a contribution of 29.5%. However, in November and December, the catch decreased sharply to 1374 t and 94 t, respectively. The combined length-weight relationship was log W = -1.50 + 2.694 log L (r = 0.86) (n = 222) indicating allometric growth. Sex ratio was 1:1.05 (n = 129). Females attained sexual maturity at 50.2 cm total length. Zoobenthos, dominated by benthic invertebrates, cnidarians and worms, zooplankton dominated by copepods and nekton dominated by Acetes spp. and clupeid juveniles were the major food items of A. monoceros. The von Bertalanffy growth equation was Lt = 63.53 [1 – e - 0.22 (t + 0.077)]. Natural mortality, fishing mortality and exploitation ratio were 0.53, 0.58 and 0.52 respectively

Item Type:Article
Uncontrolled Keywords:Aluterus monoceros; Biology; Fishery; Population dynamics; Veraval
Subjects:Pelagic Fisheries
Marine Fisheries > Population Dynamics
Divisions:CMFRI-Cochin > Marine Capture > Pelagic Fisheries
CMFRI-Veraval
ID Code:8472
Deposited By:Arun Surendran
Deposited On:12 May 2011 15:23
Last Modified:13 May 2011 12:11

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