Estimation of the population status of smooth hammerhead shark (Sphyrna zygaena) and scalloped hammerhead shark (Sphyrna lewini) in the Northwest Pacific Ocean: A data-limited approach

Journal of Sea Research, Год журнала: 2023, Номер 195, С. 102434 - 102434

Опубликована: Авг. 15, 2023

While data on fisheries, in general, may be limited, demographic models provide a valuable tool for gaining insights into population dynamics when more comprehensive understanding is not feasible. Demographic used the study of because they only require life history parameters. We performed quantitative projection basis expert knowledge, estimated mortality, and published information two hammerhead shark species, smooth (Sphyrna zygaena) scalloped lewini), we conducted an elasticity analysis determine sensitivity each stage to growth rate. This highlights overexploitation challenges faced by these ecologically important vulnerable species emphasizes need reduce fishing mortality crucial achieving growth. To increase accuracy estimates it necessary conduct further investigations their natural reproductive traits. The approach this can applied other across diverse range taxa with limited catch effort. Moreover, method easy use interpret predict future size data-limited species.

Язык: Английский

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Addressing complex fleet structure in fishery stock assessment models: Accounting for a rapidly developing pot fishery for Alaska sablefish (Anoplopoma fimbria)

Fisheries Research, Год журнала: 2023, Номер 271, С. 106917 - 106917

Опубликована: Дек. 6, 2023

Язык: Английский

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An Assessment of Fish Assemblages in a Tropical Marine Reserve Utilizing a Mono Baited Remote Underwater Video Camera and Antillean Traps

Опубликована: Янв. 1, 2024

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Язык: Английский

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Facilitating an ecosystem approach through open data and information packaging

ICES Journal of Marine Science, Год журнала: 2024, Номер 81(4), С. 724 - 732

Опубликована: Март 13, 2024

Abstract Open data that can be easily incorporated into analyses are essential for developing ecosystem approaches to marine ecological management: a common goal in fisheries policy many countries. Although it is not always clear what constitutes an approach, involves scientists working with large variety of and information, including from physical oceanographic sampling, multispecies surveys, other sources describing human pressures. This problematic analysts because these data, even when available, often held disparate datasets do necessarily correspond at appropriate temporal spatial scales. Data only obtained by specific requests individuals governmental agencies who delivering on increasing number as interest grows practical approach implementation. access model sustainable hinders the momentum development. We describe bundling R package makes climate projections available scales facilitate development Gulf St. Lawrence, Canada. integrates closely present workflow most government analysts, academics fisheries, private industry. The conforms open initiatives globally while relieving some burden provision fall laboratories. structure generic, adaptable, transferable regions jurisdictions.

Язык: Английский

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Assessing total mortality following seabird wrecks given variable data quantity and quality: the Cassin’s auklet die-off

Canadian Journal of Fisheries and Aquatic Sciences, Год журнала: 2024, Номер unknown

Опубликована: Авг. 24, 2024

Mass mortality events (MMEs) of seabirds are becoming more frequent as the global climate warms. Often documented via beached bird surveys, methods for estimating event-wide needed that can accommodate regional differences in carcass deposition and data quality/quantity. We develop a framework from counts, extending existing approaches through novel application ocean circulation modeling to assess beaching likelihood. applied our 2014/15 Cassin’s auklet ( Ptychoramphus aleuticus) MME, which spread across three regions (central California, northern California-through-Washington, British Columbia) with varying Our best estimate ∼400 000 (estimates ranged 265 700 depending on model uncertainty extent) places this seabird MME one largest record. However, we caution much exists surrounding parameterization Columbia where were sparse. suggest models, combined process-based persistence detection, improve estimates magnitude.

Язык: Английский

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