Fisheries Research最新文献

{"title":"Time series of otolith growth patterns reflects oxygen depletion tolerance in an abundant mesopelagic fish species","authors":"Francesco Saltalamacchia ,&nbsp;Martine Røysted Solås ,&nbsp;Anne Gro Vea Salvanes ,&nbsp;Arild Folkvord","doi":"10.1016/j.fishres.2024.107258","DOIUrl":"10.1016/j.fishres.2024.107258","url":null,"abstract":"<div><div>Mesopelagic fishes play a key role in marine ecosystems worldwide and are considered a potential future resource for fisheries. It is therefore crucial to fully understand their long-term growth drivers and ability to respond to ongoing global changes. In the last decade, reduced water exchange due to the warming of the North Atlantic Ocean has caused oxygen depletion in the basin water of Masfjorden, a deep Norwegian fjord hosting a large biomass of mesopelagic fishes. Semi-enclosed estuarine systems such as fjords, characterised by strong ecological and physical gradients, provide unique conditions to study the effects of environmental change on marine populations. Drawing on this natural infrastructure and a long-standing annual survey, we aimed to describe general patterns of variation and assess whether low-oxygenated waters affect the growth of one of the key mesopelagic species in the North Atlantic, the glacier lanternfish <em>Benthosema glaciale</em> (Myctophidae). We collected biological samples and environmental information spanning several years before, during and after a prolonged hypoxic period. Using otolith annual increments as a proxy for individual growth in a mixed-effects model framework, we examined growth variability in relation to internal (individual-specific) and environmental factors. Adult fish demonstrated tolerance to the measured environmental fluctuations, with minimal changes in growth trajectories. While ocean deoxygenation poses a major challenge to marine regions at a global scale, the resilience of <em>B. glaciale</em> to mild hypoxia suggests promising prospects for population persistence.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"281 ","pages":"Article 107258"},"PeriodicalIF":2.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilizing the random forest algorithm and interpretable machine learning to inform post-stratification of commercial fisheries data","authors":"Jason Gasper ,&nbsp;Jennifer Cahalan","doi":"10.1016/j.fishres.2024.107253","DOIUrl":"10.1016/j.fishres.2024.107253","url":null,"abstract":"<div><div>Federal groundfish fisheries off Alaska are managed based on near-real time estimates of catch generated using a combination of data from the North Pacific Groundfish and Pacific Halibut Observer Program, which deploys observers and Electronic Monitoring systems into the fisheries to sample catch, and industry-reported information. Catch is carefully monitored against limits that are based on biological constraints, quota allocations, or to control discard amounts. However, estimates of fish discarded at-sea (not retained for sale) can have large variance due to factors such as fishing behavior, species-specific vulnerability to fishing, and sample sizes. Post-stratification is a statistical approach widely used to improve the precision of catch estimates within a population because it controls for variance while also not relying on covariates known prior to sampling, which can be costly to collect or are unknown. Strategic use of post-stratification may increase the precision of estimates when compared to designs without post-stratification. However, choosing fishery characteristics to define post-strata may be elusive due to the high dimensionality of fishery data and complexity of creating post-strata that are optimized for multiple species. We propose a novel application of random forest classification and design-based estimation to explore multivariate post-stratification designs. These designs were evaluated by selecting the best performing trees from an ensemble using design-based estimation metrics. Results showed a large improvement in the precision of estimates by using the best-performing trees to label data and create post-strata. Moreover, through the use of subject matter expertise to evaluate the best performing trees, this method identified combinations of covariates that were not considered in previous estimation designs, and allows for exploration and testing of alternative post-strata designs that could be implemented in a management system.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"281 ","pages":"Article 107253"},"PeriodicalIF":2.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Varying organic content in fish otoliths: Effects on SIMS-based δ18O measurements and possible corrections","authors":"Timo D. Rittweg ,&nbsp;Michael Wiedenbeck ,&nbsp;Jan Fietzke ,&nbsp;Clive Trueman","doi":"10.1016/j.fishres.2024.107239","DOIUrl":"10.1016/j.fishres.2024.107239","url":null,"abstract":"<div><div>Varying organic contents in otoliths have complex and sometimes counterintuitive effects on intra-otolith δ¹⁸O measurements. This is often addressed by roasting otoliths or applying fixed corrections, however, the underlying chemical and physiological mechanisms involved are poorly understood and have not been tested in a quantitative manner, potentially rendering such corrections unreliable. Using high-resolution secondary ion mass spectrometry (SIMS) measurements of δ¹⁸O values paired with OH/¹⁶O ion ratios as organic proxy, we derived quantitative relationships of these measurements over the entire life of a large sample of northern pike (<em>Esox lucius</em>) otoliths from freshwater and brackish habitats. We assessed OH/¹⁶O ion count ratio as an organic tracer, and estimated its relationship with δ¹⁸O determinations. We developed a pointwise correction approach that accounted for variations in otolith organic contents. OH/¹⁶O ion ratio profiles agreed with other organic proxies, confirming them as reliable tracer of organic content. We detected an inverse relationship between δ¹⁸O values and OH/¹⁶O ion ratio, with elevated OH/¹⁶O ion ratios near otolith cores. OH/¹⁶O ratios decreased with distance to the core. Pairwise corrections for the effect of OH/¹⁶O ratios on δ¹⁸O values resulted in a mean offset between uncorrected and corrected values of 0.52 ‰, suggesting an approximately 2°C bias towards warmer temperature if uncorrected data were to be used for δ¹⁸O thermometry. Simultaneous determination on organic- and inorganic-bound oxygen resulted in a negative offset of δ¹⁸O, which varies with the life history of individual fish. Varying offsets in δ¹⁸O values within individual life histories could be accounted for using our correction. We recommend future SIMS-based δ¹⁸O thermometry studies to estimate the local organic content to assess whether correction is warranted. We further offer more general recommendations on how future studies may assess whether corrections for organics are necessary.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"281 ","pages":"Article 107239"},"PeriodicalIF":2.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"“Toki”, a light low-cost video system for seabed research: Performance and precision of Tehuelche scallop (Aequipecten tehuelchus) survey estimates in San José Gulf, Argentina","authors":"Gastón Trobbiani ,&nbsp;Getino Mamet Leandro ,&nbsp;Irigoyen Alejo ,&nbsp;Parma Ana María","doi":"10.1016/j.fishres.2024.107248","DOIUrl":"10.1016/j.fishres.2024.107248","url":null,"abstract":"<div><div>The monitoring of benthic biomass and biodiversity is essential for fisheries management and environmental impact assessments. In the case of commercial species, such as Tehuelche scallop (<em>Aequipecten tehuelchus</em>), accurate information on stock density and distribution is key for regulating the harvest. The standard survey method used to estimate abundance of Tehuelche scallops in San José Gulf, Argentine Patagonia, based on visual counts obtained by divers, is labor-intensive and limited to diving depths. This study introduces a light low-cost video remote system, named “Toki”, for monitoring scallop beds from small boats. Toki consists of a steel pyramidal structure that houses two cameras, capable of capturing georeferenced high-definition images. The performance of Toki for estimating the density and size composition of scallops was evaluated. The results demonstrate that Toki provides efficient and accurate density estimates, with estimation errors that vary with observer experience and environmental factors such as bottom algal cover. The size frequency distribution obtained from Toki aligned well with that of hand-collected samples, making it possible to obtain size-composition information for beds beyond diveable depths. Toki offers advantages in terms of spatial coverage, simple survey logistics and permanent data records. While there are some limitations, such as processing time for image analysis, future developments based on artificial intelligence may overcome these challenges. Toki has the potential to improve the regular monitoring of scallop beds.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"281 ","pages":"Article 107248"},"PeriodicalIF":2.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A mathematical proof comparing the statistical properties between two common approaches for parameterizing sex-composition likelihoods in fishery stock assessments","authors":"Matthew LH. Cheng ,&nbsp;Peter-John F. Hulson ,&nbsp;Daniel R. Goethel ,&nbsp;Curry J. Cunningham","doi":"10.1016/j.fishres.2024.107231","DOIUrl":"10.1016/j.fishres.2024.107231","url":null,"abstract":"<div><div>Two primary methods for parameterizing sex-specific age and length composition likelihoods in fishery stock assessments exist, which we refer to as the ‘Joint and ‘Split’ approaches. When using the ‘Joint’ approach, sex-composition data are assumed to arise from a single statistical model that describes the probability of sampling across all ages and sexes in a given year. By contrast, the ‘Split’ approach assumes that sex-composition data arises from several statistical models: sex-specific models that describe the probability of sampling ages within each sex, and an additional model that describes the sex-ratio information from composition data. In this mathematical proof, we derive the statistical properties of both approaches under multinomial and Dirichlet-multinomial sampling and show that they produce equivalent model expectations. However, we illustrate that the ‘Split’ approach leads to smaller assumed variances when sampling follows a Dirichlet-multinomial distribution, because overdispersion acts independently within each sex rather than jointly across sexes. Given that both approaches yield equivalent model expectations, we generally recommend using the ‘Joint’ approach for parameterizing sex-composition likelihoods. The ‘Joint’ approach is simpler to implement, aligns with most fisheries sampling designs, and is able to jointly account for overdispersion and sampling correlations across sexes. However, we acknowledge that in some cases, the ‘Split’ approach may be more appropriate.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"281 ","pages":"Article 107231"},"PeriodicalIF":2.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stock assessment good practices: The crescendo of CAPAM’s workshop series and their consequent special issues","authors":"Mark N. Maunder,&nbsp;Andre E. Punt,&nbsp;Rishi Sharma,&nbsp;Richard D. Methot","doi":"10.1016/j.fishres.2024.107211","DOIUrl":"10.1016/j.fishres.2024.107211","url":null,"abstract":"","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"281 ","pages":"Article 107211"},"PeriodicalIF":2.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Twenty years of AFORO: New developments and connections enhancing otolith research","authors":"A. Manjabacas ,&nbsp;Ò. Chic ,&nbsp;E. García-Ladona ,&nbsp;V.M. Tuset ,&nbsp;J.R. Morros ,&nbsp;E. Sayrol ,&nbsp;P. Martí-Puig ,&nbsp;J. Forest ,&nbsp;J. Vasconcelos ,&nbsp;A. Lombarte","doi":"10.1016/j.fishres.2024.107242","DOIUrl":"10.1016/j.fishres.2024.107242","url":null,"abstract":"<div><div>Since 2003, with the aim of addressing different issues related to otoliths and the advancement of technologies, AFORO acronym of Anàlisi de FORmes d’Otòlits (otolith shape analysis), a computational environment with a set of tools including a website for this purpose, has gradually expanded its functionality. This implies different ways to measure otoliths in order to obtain different types of information of the same individual. The 2D otoliths shape description using different methods permits the comparison between classical methods and the Wavelet transform, used in the automatic classification system of AFORO. The 3D otoliths description in a few images opens the possibility of classifications using volumetric information, which they have performed well. The data of relationships between otolith and fish length in AFORO is used in predator-prey studies. Our website offers the possibility to display otolith georeferencing information interactively. Furthermore, the automatic classification system has been improved by incorporating geographic filters based on georeferenced data. The diverse information that AFORO offers on the otoliths opens the possibility to approach new studies or to improve the existing ones, combining this information or applying the most appropriate one to the specific problem. Classification cases with Wavelets that have been improved by introducing geographical area information will be presented. In addition, Deep Learning algorithms will be introduced by performing classifications with a small subset of otoliths of species which contain a sufficient number of specimens (&gt;8).</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"281 ","pages":"Article 107242"},"PeriodicalIF":2.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing top- and bottom-opening Nordmøre-grids in south-eastern Australian estuarine squid trawls","authors":"Matt K. Broadhurst","doi":"10.1016/j.fishres.2024.107246","DOIUrl":"10.1016/j.fishres.2024.107246","url":null,"abstract":"<div><div>In response to prolonged, regional jellyfish (mostly <em>Catostylus mosaicus</em>) blooms in the Hawkesbury River, south-eastern Australia, trawlers targeting broad squid, <em>Uroteuthis</em> sp. 3 and Luminous Bay squid, <em>U. noctiluca</em> have modified their trawls to include mechanical-separating devices, and mostly bottom-opening Nordmøre-grids. Three experiments were done here to incrementally assess the relative performances of Nordmøre-grids for maintaining squid and by-product (&gt;35 mostly fish species) catches, while reducing jellyfish and other bycatch. The Nordmøre-grids had identical bar spaces (∼42 mm), sizes (1200 × 725 mm), installation angles (30°) and escape-exit designs (with a mesh cover) but were compared as (1) top- or bottom-opening orientations with long guiding panels in the extension, and then bottom-opening designs with either (2) long or short guiding panels or (3) short or no guiding panels. There were few significant differences in catches of key groups or species between any of the grids, reiterating the generic utility of the design for consistently separating out large unwanted organisms (i.e. jellyfish). Nevertheless, trawls with the top-opening design retained significantly fewer small- and medium-sized silver biddy, <em>Gerres subfasciatus</em> (a by-product species) and slightly less total by-product (attributed to a tendency for some fish to rise in the extension). Among the bottom-opening designs, using a short guiding panel and a modification involving opening meshes opposite the leading edge of the panel allowed one strong-swimming bycatch species (silver trevally, <em>Pseudocaranx georgianus</em>) to escape, although there were few other perceived benefits. While Nordmøre-grids permit squid trawling during moderate jellyfish blooms in the Hawkesbury River, alternative catching methods (e.g. jigging) might also warrant investigation for more holistically improving environmental efficiencies.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"281 ","pages":"Article 107246"},"PeriodicalIF":2.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evidence of growth-selective mortality of European anchovy larvae in the Bay of Biscay based on otolith microstructure analysis","authors":"Naroa Aldanondo ,&nbsp;Agurtzane Urtizberea,&nbsp;Unai Cotano","doi":"10.1016/j.fishres.2024.107259","DOIUrl":"10.1016/j.fishres.2024.107259","url":null,"abstract":"<div><div>We tested the hypothesis that anchovy juveniles that survived until autumn in the Bay of Biscay were the larger and faster-growing members of their cohorts. Anchovy larvae and post-larvae were collected in August 2005 and juveniles in September-October 2005 in the south-eastern part of the Bay of Biscay. Their otoliths were analysed, and larval, post-larval, and juvenile hatch date distributions, as well as daily growth patterns, were estimated. Subsequently, larval growth trajectories of juveniles were compared with those of larvae and post-larvae from the same cohort. Additionally, a generalised additive mixed model was applied to characterize otolith growth trajectory. Juveniles exhibited higher growth rates than larvae and post-larvae, providing evidence of growth-selective mortality. These differences were observed from 16 to 20 days onwards and could be related to the onset of diel vertical migration and/or larval aggregation. Our results support the hypothesis that fast growth increases the survivorship of anchovy during the larval stage. These findings contribute to a better understanding of the role of predation pressure on anchovy survival in the Bay of Biscay.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"281 ","pages":"Article 107259"},"PeriodicalIF":2.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accounting for post-release mortality in data-limited, length-based assessments for four demersal fish species with varying life histories","authors":"Brett Crisafulli ,&nbsp;Sybrand Alexander Hesp ,&nbsp;Ebenezer Afrifa-Yamoah ,&nbsp;Ute A Mueller ,&nbsp;Karina L Ryan ,&nbsp;David V Fairclough ,&nbsp;Norman G Hall ,&nbsp;Johnny Lo","doi":"10.1016/j.fishres.2024.107238","DOIUrl":"10.1016/j.fishres.2024.107238","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Released (or discarded) fish from recreational and commercial line fisheries can experience significant levels of post-release mortality (PRM), affecting sustainability. Although PRM effects are often considered in data-rich (integrated model) assessments, this is uncommon in data-limited assessments. This study investigates impacts of PRM when applying data-limited, length-based assessment methods for four reef-dwelling demersal fish species in temperate Western Australia (&lt;em&gt;Glaucosoma hebraicum&lt;/em&gt;, &lt;em&gt;Chrysophrys auratus&lt;/em&gt;, &lt;em&gt;Choerodon rubescens&lt;/em&gt; and &lt;em&gt;Epinephelides armatus&lt;/em&gt;). These species differ considerably in their biology and susceptibility to PRM. For each species simulations were undertaken to (1) evaluate the reliability of a length-based catch curve (LBCC) method for estimating fishing mortality (&lt;span&gt;&lt;math&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt;) and selectivity parameters, and (2) predict the impacts of different PRM levels on values of relative biomass, i.e. ratios of fished to unfished equilibrium spawning biomass (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;rel&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;), estimated using a length-based equilibrium analysis (LBEA). LBEA extends length-based per-recruit analysis to incorporate a stock-recruitment relationship as well as allow for PRM. On average, estimates of &lt;span&gt;&lt;math&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; and selectivity parameters from LBCC for each species were unbiased when applied to simulated data. Precision decreased, however, when LBCC was fitted to data simulated with recruitment variation. For a given &lt;span&gt;&lt;math&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt;, increased PRM levels reduced &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;rel&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; for all species, with the extent of impacts varying depending on species biology. LBCC was then applied to two actual datasets, firstly to lengths for all fish that had either been retained or released during historical recreational fishing trips (to estimate gear selectivity), and secondly to length data for retained fish from recent charter fishing (to estimate &lt;span&gt;&lt;math&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; and selectivity of landings). The resultant estimates were then used in LBEA to estimate &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;rel&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; with and without accounting for PRM. Relative impacts of PRM varied among species depending on their biology and size limits. While PRM was predicted to have limited impact on &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;rel&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; for &lt;em&gt;C. rubescens&lt;/em&gt; (as fish are not fully selected by the gear until they attain a relatively large size), accounting for PRM resulted in estimates of &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;rel&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; (at their current estimated &lt;span&gt;&lt;math&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; levels) being reduced by 31 % for &lt;em&gt;G. hebraicum&lt;/em&gt;, 36 % for &lt;em&gt;C. auratus&lt;/em&gt; ","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"281 ","pages":"Article 107238"},"PeriodicalIF":2.2,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}