Growth, Mortality and Stock Assessment of Indian Mackerel, Rastrelliger kanagurta (Cuvier, 1816) in the Coastal Waters of Pakistan, Northern Arabian Sea
| Autor: | Zarrien Ayub, Ghazala Siddiqui, Muhammad Moazzam, Shakeelur Rehman |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
education.field_of_study Stock assessment Indian mackerel 010604 marine biology & hydrobiology Mortality rate Fishing Population 04 agricultural and veterinary sciences Aquatic Science Biology Oceanography Von bertalanffy biology.organism_classification 01 natural sciences Fishery Total mortality 040102 fisheries 0401 agriculture forestry and fisheries education Rastrelliger |
| Zdroj: | Russian Journal of Marine Biology. 45:67-73 |
| ISSN: | 1608-3377 1063-0740 |
| DOI: | 10.1134/s1063074019010073 |
| Popis: | Population dynamics parameters of Rastrelliger kanagurta (Cuvier, 1816) were analyzed from January to December 2008 in coastal waters of Pakistan. FiSAT software was used to assess growth population dynamics parameters. The growth parameters K = 0.84 year–1 and L∞ = 24.57 cm were estimated with the aid of von Bertalanffy growth function. The natural mortality rate (M), the fishing mortality rate (F), and the total mortality rate (Z) were calculated as 1.682, 2.208, and 3.890 year–1, respectively. The annual instantaneous fishing mortality rate in our study was considerably greater than both the target (Fopt = 0.841 year−1) and limit (Flimit = 1.121 year−1) biological reference points, suggesting that this species is being over-exploited in the waters of Pakistan. An exploitation rate (E) was estimated to be 0.567 year–1and longevity (tmax) was calculated as 3/K equal to 3.57 years. The fishery of R. kanagurta by the gillnet catches in our study are of ages 2 to 3 years which indicated a reasonable mesh size for the catch. |
| Databáze: | OpenAIRE |
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