Studies on Population Characteristics of Frigate tuna, Auxis thazard (Lacepede,1800) Occurring in the North West Coast of India
Journal Title: SSR Institute of International Journal of Life Sciences (SSR-IIJLS) - Year 2018, Vol 4, Issue 2
Abstract
This study is an attempt to understand the population characteristics such as Length-weight relationships, age, growth, mortality, length at age and exploitation rate of Frigate tuna, Auxis thazard occurring in the North west coast of India. The data collected from various fish landing centers from 2008 to 2012 were considered for this study. The mean fork length and weight 32.35 cm and 1.040 kg were observed respectively. The length-weight relationship W=2.4321x10-1 FL 2.27658, and r2 0.9576 was obtained. The value of ‘b’ found to be less than 3 and hence this species is showing negative allometric growth. The growth parameters on von Bertalanffy for L∞ estimated as 47.03, K was 1.30 and to was -0.23. The Phi-prime value (⏀) of 3.33 was derived. The length at age observed at the end of 1 to 4 years was 27.0, 42.0, 50.0 and 55.0 cm year-1 respectively. The natural mortality (M) 1.00 year-1, total mortality (Z) of 4.43 year-1 and fishing mortality (F) 3.43 year-1 were derived with the mean temperature of 27°C. The exploitation ratio(E) and exploitation rate(U) was 0.77. The results derived in the present study with regard to population characteristics of frigate tuna in the coastal waters of North west coast of India indicate catching of this species in the area to be minimized
Authors and Affiliations
Vinod Kumar Mudumala, Mahesh Kumar Farejiya, Kiran S. Mali, Rama Rao Karri, D. E. Uikey, Sawant Pradnya A. , Siva A.
Keywords
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- EP ID EP670658
- DOI 10.21276/ijlssr.2018.4.2.3
- Views 124
- Downloads 0
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