Lessons to be learned by comparing integrated fisheries stock assessment models (SAMs) with integrated population models (IPMs)

Fisheries Research, Journal Year: 2024, Volume and Issue: 272, P. 106925 - 106925

Published: Jan. 5, 2024

Integrated fisheries stock assessment models (SAMs) and integrated population (IPMs) are used in biological ecological systems to estimate abundance demographic rates. The approaches fundamentally very similar, but historically have been considered as separate endeavors, resulting a loss of shared vision, practice progress. We review the two identify similarities differences, with view identifying key lessons that would benefit more generally overarching topic ecology. present case study for each SAM (snapper from west coast New Zealand) IPM (woodchat shrikes Germany) highlight differences similarities. between SAMs IPMs appear be objectives parameter estimates required meet these objectives, size spatial scale populations, differing availability various types data. In addition, up now, typical applied aquatic habitats, while most stem terrestrial habitats. aim assess level sustainable exploitation fish so absolute or biomass must estimated, although some only relative trends. Relative is often sufficient understand dynamics inform conservation actions, which main objective IPMs. small populations concern, where uncertainty can important, conveniently implemented using Bayesian approaches. typically at moderate scales (1 104 km2), possibility collecting detailed longitudinal individual data, whereas large, economically valuable stocks large (104 106 km2) limited There sense data- (or information-) hungry than an because its goal abundance, data rates difficult obtain (often marine) applied. therefore require 'tuning' assumptions IPMs, 'data speak themselves', consequently techniques such weighting model evaluation nuanced being fit disaggregated quantify variation allow richer inference on processes. attempts example by unconditional capture-recapture

Language: Английский

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‘Drivin' with your eyes closed’: Results from an international, blinded simulation experiment to evaluate spatial stock assessments

Fish and Fisheries, Journal Year: 2024, Volume and Issue: 25(3), P. 471 - 490

Published: March 1, 2024

Abstract Spatial models enable understanding potential redistribution of marine resources associated with ecosystem drivers and climate change. Stock assessment platforms can incorporate spatial processes, but have not been widely implemented or simulation tested. To address this research gap, an international experiment was organized. The study design blinded to replicate uncertainty similar a real‐world stock process, data‐conditioned, high‐resolution operating model (OM) used emulate the dynamics data for Indian Ocean yellowfin tuna ( Thunnus albacares ). Six analyst groups developed both single‐region using platform their choice, then applied each simulated data. Results indicated that across all structures platforms, assessments were able adequately recreate population trends from OM. Additionally, estimate regional generally reflected true OM, particularly regions higher biomass fishing pressure. However, consistent scaling pattern emerged, where estimated scale than within given platform. Balancing parsimony complexity trade‐offs difficult, adequate in parametrizations (e.g., allowing time‐ age‐variation movement appropriate tag mixing periods) critical performance. We recommend expanded use OMs studies, ability portray realistic performance models. Moreover, increased support experiments is warranted facilitate dissemination methodology organizations.

Language: 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, Journal Year: 2024, Volume and Issue: 279, P. 107135 - 107135

Published: Aug. 3, 2024

Language: Английский

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Hybridization and Introgression in Black Hakes (Merluccius polli and M. senegalensis): Evolutionary Dynamics and Conservation Implications in the Contact Zone Exploited by Multi‐Species Fisheries

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

ABSTRACT Hybridization is relatively common between closely related species that share part of their distribution. Understanding its dynamics important both for conservation purposes and to determine role as an evolutionary mechanism. Here we have studied the case black hakes ( Merluccius polli senegalensis ) in contact zone. The area study located FAO fishing 34, Mauritania Senegal waters, where are exploited jointly multi‐species fisheries involving national foreign fleets. Using a ddRADSeq approach based on set 5820 SNPs total 240 individuals, identified one F 1 hybrid several backcrossed individuals among 90 M. samples none obtained 2020, suggesting unidirectional introgression towards . signals were not found any 60 historical from 2000. Excluding hybrids developing two separate sets (5093 2794 ), our results detected distinct genetic clusters within show different diversity estimates, with showing higher potential vulnerability exploitation. This pattern was observed contemporary samples, groups presented subtle depth segregation. Moreover, 109 outlier loci groups, could be developed into molecular markers further differentiation contribute improved stock assessment management these demersal resources.

Language: Английский

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Black Sea Bass Centropristis striata Year Class Strength and Spatial Extent from Two Long-Term Surveys off the Southeast U.S. Atlantic Coast

Fishes, Journal Year: 2025, Volume and Issue: 10(2), P. 53 - 53

Published: Jan. 28, 2025

The Southeastern U.S. Atlantic coast (North Carolina to Florida, U.S.A.) has undergone considerable environmental change in recent decades, including increasing coastal water temperature and human development. region is also home a diverse suite of exploited reef fish species, the southern stock black sea bass (Centropristis striata). objective current study was compare trends year class strength central location captured by trawls (age 0) traps 2) as well those regional bottom temperature. We found no correlation between age 0 2 abundance when comparing same class, suggesting that numbers trawl-caught juveniles cannot predict number adults available fishery. Larger classes observed were correlated with centers farther south region, while smaller corresponded more northerly abundance. In both traps, strong occurred following years below-average temperatures, series recent, weak correspond higher-than-average temperatures. It unclear whether correlations shifting abundance, strength, indicate range contraction for or movement into areas previously inhabited northern species.

Language: Английский

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Identifying capacity limitations and training needs using a stock assessment game

Fisheries Research, Journal Year: 2025, Volume and Issue: 284, P. 107319 - 107319

Published: March 12, 2025

Language: Английский

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Parasites as indicators of intra-stock variability in marine fisheries

Fisheries Research, Journal Year: 2025, Volume and Issue: 285, P. 107373 - 107373

Published: April 14, 2025

Language: Английский

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Synthesizing the spatial functionality of contemporary stock assessment software to identify future needs for next generation assessment platforms

Fisheries Research, Journal Year: 2024, Volume and Issue: 275, P. 107008 - 107008

Published: April 16, 2024

Language: Английский

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Movement traits important to conservation and fisheries management: an example with red snapper

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 7, 2025

Abstract Site fidelity, space use, and dispersal are commonly estimated with acoustic telemetry (AT) to help inform management conservation. These behaviors can change age, habitat environmental conditions our ability accurately estimate them is affected by a study’s inference power (design components that affect how detection data represents species’ movements). Red snapper ( Lutjanus campechanus ) have been extensively studied AT over range of time periods regions, although primarily at artificial reefs (AR). Here, we use large (> 12 km 2 positioning arrays monitor study area low-relief hard bottom, reef ledge, an AR. Annual fidelity the was be 54%, but estimates were fate uncertainty model choice. Emigration increased storms in early summer. Abundance greatest small patches did not scale patch size. Although uncommon, long-distance movements connectivity between habitats occurred, maximum 206 km. Previous red studies varied greatly array size, duration, number fish tracked, impacting power. This made it difficult compare results highlights need for greater standardization methods.

Language: Английский

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Identifying spatiotemporal variations in four-spot megrim (Lepidorhombus boscii) fishery nurseries to enhance management and stock assessment

Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12

Published: April 28, 2025

Introduction The identification of recruitment areas and other essential fish habitats exploited stocks is a fundamental requirement for the development marine spatial planning ecosystem conservation measures. Reducing mortality particularly relevant on northern continental shelf Iberian Peninsula one key prerequisites future sustainability trawl fisheries. Methods In this study, distribution nursery four-spot megrim ( Lepidorhombus boscii ) was analyzed using time series scientific bottom survey data to assess whether are persistent over time. Four environmental variables were considered as potential predictors recruit distribution, they may influence habitat selection by species: sea temperature, salinity, bathymetry, sediment type. Additionally in second stage based findings during work, abundance index within a4a stock assessment model currently used provide advice species divided into two areas. Results Spatial analyses revealed specific depth preference recruits, with higher shallower waters, 150 300 m range, respect deeper ones. More importantly, our showed significant spatial-temporal variability Furthermore, results updated differences biological reference points (BRPs) compared existing model. Discussion This suggests that static management approaches be ineffective due underscoring importance incorporating structure process. approach enables more accurate evaluations effective, sustainable management, thus laying groundwork implementation species.

Language: Английский

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