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<p>This study represents the first comprehensive assessment of <i>Scomberoides commersonnianus</i> stock status along the Gwadar coast using a length-based stock assessment approach. The analysis was conducted using the TropFishR package to estimate key growth and mortality parameters, exploitation rates, and biological reference points through yield-per-recruit modeling. The length–weight relationship revealed an isometric growth pattern for <i>Scomberoides commersonnianus</i> (b = 3.0; R² = 0.96). Growth parameter estimates yielded an asymptotic length (L<sub>∞</sub>) of 104.31&#xa0;cm and a growth coefficient (K) of 0.35 year⁻¹. Mortality assessments indicated a total mortality rate (Z) of 1.56 year⁻¹, natural mortality (M) of 0.41 year⁻¹, and fishing mortality (F) of 1.15 year⁻¹, resulting in an exploitation rate (E) of 0.73 well above sustainable levels and indicative of excessive fishing pressure. These results highlight that <i>Scomberoides commersonnianus</i> along the Gwadar coast is experiencing unsustainable exploitation. Management actions are required to reduce fishing pressure by approximately 36.5% to facilitate stock recovery and ensure the long-term sustainability of this valuable coastal fishery.</p>

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Length-Based Stock Assessment of Scomberoides commersonnianus (Talang queenfish) from Gwadar Coast, Balochistan, Pakistan

  • 期刊论文

  • 发表日期：

    2025年12月15日

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  • Samroz Majeed

摘要

This study represents the first comprehensive assessment of Scomberoides commersonnianus stock status along the Gwadar coast using a length-based stock assessment approach. The analysis was conducted using the TropFishR package to estimate key growth and mortality parameters, exploitation rates, and biological reference points through yield-per-recruit modeling. The length–weight relationship revealed an isometric growth pattern for Scomberoides commersonnianus (b = 3.0; R² = 0.96). Growth parameter estimates yielded an asymptotic length (L∞) of 104.31 cm and a growth coefficient (K) of 0.35 year⁻¹. Mortality assessments indicated a total mortality rate (Z) of 1.56 year⁻¹, natural mortality (M) of 0.41 year⁻¹, and fishing mortality (F) of 1.15 year⁻¹, resulting in an exploitation rate (E) of 0.73 well above sustainable levels and indicative of excessive fishing pressure. These results highlight that Scomberoides commersonnianus along the Gwadar coast is experiencing unsustainable exploitation. Management actions are required to reduce fishing pressure by approximately 36.5% to facilitate stock recovery and ensure the long-term sustainability of this valuable coastal fishery.