Dynamics of Priacanthus hamrur (Forsskal) exploited off Saurashtra coast

Kizhakudan, Shoba Joe and Zala, M S (2006) Dynamics of Priacanthus hamrur (Forsskal) exploited off Saurashtra coast. Indian Journal of Fisheries, 53 (4). pp. 409-416.

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Abstract

Bull’s eye landings off Saurashtra reached a peak of 3813 tons in 1999 with a catch rate of 4.3 kg per haul. The group is represented by a single species, Priacanthus hamrur (Forsskal). Gut content analysis revealed P. hamrur to be a carnivorous fish with a preference for pelagic crustaceans and fishes. Spawning females were encountered from March to December and the length at first maturity of female P. hamrur was 198 mm. Recruitment to the fishery takes place with two peaks annually - one in January-February and a minor one in October-November. A common length-weight relationship for both sexes was obtained with a = 3.481x105 and b = 2.83498. The von Bertalanffy growth equation was derived as Lt = 360.35 [1-e-0.56(t+ 0.1013)] and the length attained by the fish at the end of 1 to 4 years were estimated as 165, 249, 296 and 324 mm. The length growth performance index was obtained as !’ = 4.86 and the longevity, tmax was estimated as 4.44 years. The mortality co-efficient Z, M and F were 2.35, 1.14 and 1.21, respectively and exploitation rate, E was 0.51. Stock assessment studies reveal that the present average annual catch can be increased by 764 t to reach the MSY of 4996 tons.

Item Type:Article
Uncontrolled Keywords:Dynamics; Priacanthus hamrur; Saurashtra coast
Subjects:Marine Fisheries > Population Dynamics
Divisions:CMFRI-Cochin > Marine Capture > Demersal Fisheries
ID Code:6268
Deposited By:Dr. V Mohan
Deposited On:12 Nov 2010 11:19
Last Modified:19 Oct 2011 12:17

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