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Assessing Five Major Exploited Tuna Species in India (Eastern and Western Indian Ocean) Using the Monte Carlo Method (CMSY) and the Bayesian Schaefer Model (BSM)

Author

Listed:
  • Ubair Nisar

    (Key Laboratory of Mariculture (Ministry of Education), Fisheries College, Ocean University of China, No. 5 Yushan Road, Qingdao 266003, China
    U.N. and R.A. contributed equally to this work.)

  • Rafiya Ali

    (Key Laboratory of Mariculture (Ministry of Education), Fisheries College, Ocean University of China, No. 5 Yushan Road, Qingdao 266003, China
    U.N. and R.A. contributed equally to this work.)

  • Yongtong Mu

    (Key Laboratory of Mariculture (Ministry of Education), Fisheries College, Ocean University of China, No. 5 Yushan Road, Qingdao 266003, China)

  • Yu Sun

    (School of Management, Qingdao Agricultural University, Qingdao 266109, China)

Abstract

The status of data-limited tuna fishery stocks in India has been tested using the latest and most advanced computerized methods, CMSY and BSM. Five tuna fish stocks from both the Eastern and Western Indian Ocean were assessed using both catch and catch per unit effort (CPUE) details available from 1990 to 2015. Both methods help to calculate the maximum sustainable yield (MSY) and exploitation of MSY relative to biomass (B/B MSY ). The results of maximum intrinsic rate (r) and carrying capacity are also estimated. The results revealed that all tuna stocks in both the regions were overfished, with one, the longtail tuna ( Thunnus tonggol ) in the Western Indian Ocean strongly overfished (B/B MSY = 0.44). Such observations, although still preliminary since the techniques used to produce them are relatively new, often associated with the situation and exploitation of all the stock in question, making the CMSY and BSM methods promising for stock assessment in data-deficit situations. The study concludes that in order to restore the status of these five tuna stocks in both regions, it would be necessary to reduce the fishing pressure.

Suggested Citation

  • Ubair Nisar & Rafiya Ali & Yongtong Mu & Yu Sun, 2021. "Assessing Five Major Exploited Tuna Species in India (Eastern and Western Indian Ocean) Using the Monte Carlo Method (CMSY) and the Bayesian Schaefer Model (BSM)," Sustainability, MDPI, vol. 13(16), pages 1-13, August.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:16:p:8868-:d:610658
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    References listed on IDEAS

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