Fishery management strategies for Red Snapper in the southeastern U.S. Atlantic: A spatial population model to compare approaches

North American Journal of Fisheries Management, Год журнала: 2024, Номер 44(1), С. 113 - 131

Опубликована: Янв. 20, 2024

Abstract Objective Red Snapper Lutjanus campechanus is an iconic species in the southeast U.S. Atlantic Ocean, sought by both commercial and recreational fleets. Five stock assessments over past quarter century have shown to be experiencing overfishing. Highly restricted landings since 2010 been insufficient end overfishing because fishing effort not specific but rather applies generally a complex of reef‐associated species. Consequently, are discarded as bycatch when regulations prohibit their retention, many fish die from hook injury, barotrauma, or depredation. Methods Here we developed spatial population model multispecies fishery that captures them Atlantic. We then simulated compared 25 different management measures fall broadly into categories gear modifications, discard mortality mitigation, size limits, approaches, temporal approaches. Criteria for comparison address goals decreasing dead discards, rebuilding age structure, increasing spawning biomass. Result found most effective reduced effort, either temporally spatially, benefits could largely obtained focusing on fleet. Discard mitigation (e.g., through use descender devices) displayed wide range effectiveness depending plausible levels reduction, it addressed all practice paired with other measures. A measure combined full retention caught showed greatest potential simultaneously rebuild stock, increase landings, eliminate discards. Conclusion To required law, resource managers should reconsider policy unrestricted private fleet this fishery. The would include increased catch rates, larger landed fish, fewer

Язык: Английский

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The use of conceptual models to structure stock assessments: A tool for collaboration and for “modelling what to model”

Fisheries Research, Год журнала: 2024, Номер 279, С. 107135 - 107135

Опубликована: Авг. 3, 2024

Язык: Английский

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Ecological consequences of body size reduction under warming

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2024, Номер 291(2029)

Опубликована: Авг. 1, 2024

Body size reduction is a universal response to warming, but its ecological consequences across biological levels, from individuals ecosystems, remain poorly understood. Most processes scale with body size, and warming-induced changes in can therefore have important consequences. To understand these consequences, we propose unifying, hierarchical framework for the impacts of intraspecific reductions due thermal plasticity that explicitly builds on three key pathways: morphological constraints, bioenergetic constraints surface-to-volume ratio. Using this framework, synthesize at multiple levels organization. We outline how trait-based improve our understanding, detection generalization warming.

Язык: Английский

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Natural mortality: Theory, estimation and application in fishery stock assessment models

Fisheries Research, Год журнала: 2023, Номер 261, С. 106638 - 106638

Опубликована: Янв. 30, 2023

Язык: Английский

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Estimating the relationship between fitness and metabolic rate: which rate should we use?

Philosophical Transactions of the Royal Society B Biological Sciences, Год журнала: 2024, Номер 379(1896)

Опубликована: Янв. 8, 2024

As physiologists seek to better understand how and why metabolism varies, they have focused on metabolic rate covaries with fitness—that is, selection. Evolutionary biologists developed a sophisticated framework for exploring selection, but there are particular challenges associated estimating selection owing its allometric relationship body mass. Most researchers estimate mass absolute rate; or mass-independent (MIMR)—the residuals generated from nonlinear regression. These approaches sometimes treated as synonymous: their coefficients often interpreted in the same way. Here, we show that these not equivalent because MIMR different traits. We also it is difficult make sound biological inferences about causal enigmatic. By contrast, requires less-desirable statistical practices (i.e. predictor), provides clearer pathways. Moreover, argue estimates of more meaningful interpretations interested drivers variation allometry. This article part theme issue ‘The evolutionary significance rates’.

Язык: Английский

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Optimal harvesting policy for biological resources with uncertain heterogeneity for application in fisheries management

Natural Resource Modeling, Год журнала: 2024, Номер 37(2)

Опубликована: Янв. 31, 2024

Abstract Conventional harvesting problems for natural resources often assume physiological homogeneity of the body length/weight among individuals. However, such assumptions generally are not valid in real‐world problems, where heterogeneity plays an essential role planning biological resource harvesting. Furthermore, it is difficult to observe directly from available data. This paper presents a novel optimal control framework cost‐efficient application fisheries management. The incorporated into dynamics, which population dynamics this case, through probability density that can be distorted reality. Subsequently, distortion, model uncertainty, penalized divergence, leading nonstandard dynamic differential game wherein Hamilton–Jacobi–Bellman–Isaacs (HJBI) equation has unique nonlinear partial term. Here, existence and uniqueness results HJBI presented along with explicit monotone finite difference method. Finally, proposed applied problem recreationally, economically, ecologically important fish species using collected field

Язык: Английский

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Performance gains from incorporating dynamic numbers by length-within-age in fishery assessment models

Fisheries Research, Год журнала: 2024, Номер 276, С. 107039 - 107039

Опубликована: Май 20, 2024

Язык: Английский

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Predicted effects of marine protected areas on conservation and catches are sensitive to model structure

Theoretical Ecology, Год журнала: 2025, Номер 18(1)

Опубликована: Янв. 2, 2025

Язык: Английский

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Reproductive characteristics and spawning potential ratio modeling of a vulnerable riverine specialist in the lower unchannelized Missouri river, USA

Fisheries Research, Год журнала: 2025, Номер 286, С. 107386 - 107386

Опубликована: Май 3, 2025

Язык: Английский

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Early life-stage and adult productivity dynamics derived from a state-space stock assessment model for data-limited Thorny Skates (Amblyraja radiata Donovan, 1808) in NAFO Divisions 3LNO and Subdivision 3Ps

Fisheries Research, Год журнала: 2025, Номер 286, С. 107396 - 107396

Опубликована: Май 8, 2025

Язык: Английский

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