Biology and population dynamics of the grey dogshark, Rhizoprionodon (Rhizoprionodon) acutus (Ruppell), In Madras waters

Krishnamoorthi, B and Jagadis, I (1986) Biology and population dynamics of the grey dogshark, Rhizoprionodon (Rhizoprionodon) acutus (Ruppell), In Madras waters. Indian Journal of Fisheries, 33 (4). pp. 371-385.

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Abstract

The morphometric ratios of 13 characters of a sample of 105 specimens ranging in size from 144 mm to 826 mm established the identity of the species, Rhizopiionodon (Rhizoprionodon) acutus (Ruppell), supporting the shark fisheries at Madras. The Bertalanffy's growth parameters were: 1 !« = 1.78 yrs; K =" 0.2; and L„ 100 cm. R. (R.) acutus attains sizes of 417.3, 522.9, 609.4, 680.2, 738.2, 785.6, 824.5, 856.3, 882.3 and 903.7 mm respectively at ages of 1 to 10 years. The regression equations of length on weight between females and males were not significantly different. Although the overall sex ratio was 1 : 1.34, females were predominant up to the size group of 60-70 cm and during the months of February, March and April

Item Type:Article
Uncontrolled Keywords:Fishery Biology; population dynamics; grey dogshark; shark; Rhizoprionodon acutus In Madras waters
Subjects:Marine Fisheries > Population Dynamics
Divisions:CMFRI-Cochin > Marine Capture > Fishery Resource Assessment
ID Code:396
Deposited By:Dr. V Mohan
Deposited On:16 Apr 2010 16:22
Last Modified:16 Apr 2010 16:22

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