Fisheries ResearchPub Date : 2025-09-16DOI: 10.1016/j.fishres.2025.107533
Zhuang Chen , Guoping Zhu
{"title":"Variability in the density contrast of Antarctic krill (Euphausia superba): The non-negligible importance of size, season and region","authors":"Zhuang Chen , Guoping Zhu","doi":"10.1016/j.fishres.2025.107533","DOIUrl":"10.1016/j.fishres.2025.107533","url":null,"abstract":"<div><div>The acoustic method has been widely used for estimating the biomass of Antarctic krill (<em>Euphausia superba</em>), the accuracy of which is often influenced by the parameters of the acoustic scattering model. A constant g-value has been used for this model, potentially introducing biases in the estimates due to effects of ontogeny, season and region. This study investigated the g-value of krill and the effects of size, season and region on this value using the generalized additive model (GAM) and found that the g-values were significantly affected by these variables. The optimal GAM explained 57.3 % of the deviance in the krill g-values, with 'Month' contributing the largest share (24.32 % absolute, 42.43 % relative to the explained deviance). A 0.5 % change in the g-value was found to result in approximately 0.8 dB difference in target strength. This study concluded that the importance of krill standard length, region and season cannot be neglected when considering the g-value as an input parameter in acoustic estimation of krill biomass. The study further suggests that ontogenetic, regional and seasonal variation in the g-value of krill should be incorporated into acoustic biomass estimation models to improve their accuracy and support krill conservation and management efforts.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"291 ","pages":"Article 107533"},"PeriodicalIF":2.3,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106725","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}
Fisheries ResearchPub Date : 2025-09-15DOI: 10.1016/j.fishres.2025.107534
Martin Santivañez-Yuffra , Nathaly Pereira-Letona , Cynthia Vasquez-Paredes
{"title":"In situ target strength measurements of Peruvian anchovy (Engraulis ringens) from data collected by a commercial echosounder during fishing operations","authors":"Martin Santivañez-Yuffra , Nathaly Pereira-Letona , Cynthia Vasquez-Paredes","doi":"10.1016/j.fishres.2025.107534","DOIUrl":"10.1016/j.fishres.2025.107534","url":null,"abstract":"<div><div>Although fishing vessels have been used as opportunistic scientific platforms in the last two decades, target strength (TS) studies based on industry-collected data are still scarce. Here we present an <em>in situ</em> TS estimation of Peruvian anchovy (<em>Engraulis ringens</em>) from data recorded by a 120 kHz Simrad ES60 commercial echosounder mounted on the purse-seiner “Maru” in May-July 2017 during its fishing operations on North-Center stock area. TS-length (L) relationships (TS=a Log<sub>10</sub> (L)+b, with b= b<sub>20</sub> when a= 20) were estimated from pooled data using a curve fitting method. Influence of depth (Z) on TS was also investigated. Mean TS of 10–16.5 cm individuals was −54.2 dB (±0.2 dB) with corresponding a, b and b<sub>20</sub> values of 22.2, −79.5 dB and −77 dB. TS showed strong dependence with depth following Boyle’s law: TS= 20Log<sub>10</sub>(L)-6.4Log<sub>10</sub>(1-Z/10)-73.3 dB (r<sup>2</sup>=0.8). Our TS and b<sub>20</sub> estimates are in line with existing values for <em>E. ringens</em> in Perú but are lower than those published for the same species in Chile and from other members of the <em>Engraulis</em> genus. Results reported here can be used for biomass estimation during periods not covered by systematic surveys, helping to achieve near-real time monitoring of stocks.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"291 ","pages":"Article 107534"},"PeriodicalIF":2.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061038","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}
Fisheries ResearchPub Date : 2025-09-12DOI: 10.1016/j.fishres.2025.107501
Gustav Hellström , Kim Birnie-Gauvin , Petter Lundberg , William Jaktén Langert , Kristi Källo , Lene K. Sortland , Brian R. MacKenzie , Jose Luis Varela , Anders Koed , Einar Eg Nielsen , Andreas Sundelöf , Hege Sande , Maria Overgård , Henrik Baktoft , Kim Aarestrup , Tomas Brodin
{"title":"New trophic insights associated with the return of a top predator, bluefin tuna, to Skagerrak and the Sound","authors":"Gustav Hellström , Kim Birnie-Gauvin , Petter Lundberg , William Jaktén Langert , Kristi Källo , Lene K. Sortland , Brian R. MacKenzie , Jose Luis Varela , Anders Koed , Einar Eg Nielsen , Andreas Sundelöf , Hege Sande , Maria Overgård , Henrik Baktoft , Kim Aarestrup , Tomas Brodin","doi":"10.1016/j.fishres.2025.107501","DOIUrl":"10.1016/j.fishres.2025.107501","url":null,"abstract":"<div><div>This study examines the dietary composition of the recently reoccurring Atlantic bluefin tuna (ABFT, <em>Thunnus thynnus</em>) in the Skagerrak-Kattegat-Sound area of the North-East Atlantic. We analysed the stomach contents of 44 ABFT, with lengths between 232 and 295 cm (CFL), captured in August and September annually from 2020 to 2022 via rod-and-reel fishing. Our analysis identified 19 species of teleost fish, four types of squid, and one crab species, although the diet was dominated by pelagic schooling fish such as garfish (percentage of index of relative abundance (%IRI) = 22.5), herring (%IRI = 6.8), mackerel (%IRI = 6.8), and various demersal gadoid species (combined %IRI = 42). Regional variation in dietary composition between Skagerrak and the Sound indicates that ABFT exhibit foraging flexibility, primarily targeting locally abundant, energy-rich schooling fish, while occasionally consuming other prey. The prevalence of garfish in the diet, which is neither commercially targeted nor managed or regulated, highlights the importance of maintaining healthy stocks of this species for supporting the continuous return of ABFT to the area.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"291 ","pages":"Article 107501"},"PeriodicalIF":2.3,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050187","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}
Fisheries ResearchPub Date : 2025-09-11DOI: 10.1016/j.fishres.2025.107523
André E. Punt , Michael G. Dalton , W. Christopher Long , Wei Cheng , Albert J. Hermann , Kirstin K. Holsman
{"title":"Identifying and reducing climate uncertainty in fisheries management reference points","authors":"André E. Punt , Michael G. Dalton , W. Christopher Long , Wei Cheng , Albert J. Hermann , Kirstin K. Holsman","doi":"10.1016/j.fishres.2025.107523","DOIUrl":"10.1016/j.fishres.2025.107523","url":null,"abstract":"<div><div>Modelling has predicted that reductions in ocean pH and increases in temperature will reduce vital rates (survival and growth) of North Pacific crab stocks and hence the target levels of fishing mortality consistent with sustainable harvesting. However, these predictions have been based on the best estimates of the effects of changes in ocean pH and temperature on vital rates from laboratory experiments. We quantified the effects of several climate and market sources of variability in Alaskan red king and southern Tanner crab fisheries on predicted optimal fishing mortality rates, including changes in ocean chemistry and temperature on vital rates, non-linear relationships between prices, costs and catch, and the uncertainty in population dynamics models. The declines in survival consistently lead to predictions of a reduction in productivity and hence the optimal level of fishing intensity over time, but the extent of change is uncertain. Uncertainty related to the effects of ocean pH and temperature on vital rates and variability among Earth System Models and future emission scenarios are the dominant sources of uncertainty, although potential fluctuations in prices and costs are also consequential. Further, simulations are used to explore the relationship between changes in ocean pH or temperature and vital rates (additional experimental replicates and a wider range of levels of ocean pH in experiments) and hence identify approaches to reduce the uncertainty in estimates of future projections of target fishing mortality rates. Importantly, we demonstrate that optimal approaches to reducing uncertainty depend on life stage (juvenile growth for red king crab and larval survival for southern Tanner crab), and the optimal experiment depends on species (increasing the range of pH levels for red king crab vs increasing sample sizes for southern Tanner crab). The results of this study can inform priorities for future ocean acidification-related laboratory experiments and provide a basis for evaluating “investment in research” more broadly.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"291 ","pages":"Article 107523"},"PeriodicalIF":2.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050186","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}
Fisheries ResearchPub Date : 2025-09-10DOI: 10.1016/j.fishres.2025.107522
Patrick Reis-Santos , Rhiannon A. Van Eck , Charlotte Gauthier , Joseph B. Widdrington , Rowan C. Chick , Bronwyn M. Gillanders , Matthew D. Taylor
{"title":"Investigation of shell banding in an arcid cockle alongside trace-element concentrations to evaluate potential suitability for age estimation","authors":"Patrick Reis-Santos , Rhiannon A. Van Eck , Charlotte Gauthier , Joseph B. Widdrington , Rowan C. Chick , Bronwyn M. Gillanders , Matthew D. Taylor","doi":"10.1016/j.fishres.2025.107522","DOIUrl":"10.1016/j.fishres.2025.107522","url":null,"abstract":"<div><div>Arcid clams or cockles (Arcidae) are widespread sediment-associated bivalves that support commercial, recreational and cultural fisheries. Despite their importance, ageing in these species has received little attention, constraining stock assessment to length-based models and data limited approaches. In this context, sclerochronology (growth increments) and sclerochemistry (chemical proxies) offer valuable tools for population analysis and environmental reconstructions. Here, we investigated shell banding in Sydney Cockle (<em>Anadara trapezia</em>) alongside shell chemistry to assess the potential suitability for ageing. Specifically, we examined whether variation in Mg:Ca and Sr:Ca was associated with shell bands, as a means of validating seasonal growth increments. Banding patterns correlated closely with seasonal variation in shell chemistry, and application of innovative peak detection algorithms (spline quantile regression, and split moving window analysis) to chemical data improved the objectivity of increment identification, particularly for Mg:Ca and in larger, older shells. Overall, the results indicated that dark shell bands in Sydney Cockle are most likely annuli, and are likely to be appropriate for determining age composition and growth in the species. By enhancing objectivity and consistency, particularly for Mg:Ca, our integrated approach supports more robust age and growth assessments. The protocol developed for ageing and chemical analysis is relevant for ageing other arcid cockle species, but further validation work will improve confidence in ageing data using this approach.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"291 ","pages":"Article 107522"},"PeriodicalIF":2.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027383","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}
Fisheries ResearchPub Date : 2025-09-10DOI: 10.1016/j.fishres.2025.107521
Kate M. Seinor , Hamish A. Malcolm , Kirsten Benkendorff , Stephen D.A. Smith , Robert G. Creese , Steven W. Purcell
{"title":"Latitudinal variation in age and growth of a harvested, rocky-reef gastropod (Turbinidae)","authors":"Kate M. Seinor , Hamish A. Malcolm , Kirsten Benkendorff , Stephen D.A. Smith , Robert G. Creese , Steven W. Purcell","doi":"10.1016/j.fishres.2025.107521","DOIUrl":"10.1016/j.fishres.2025.107521","url":null,"abstract":"<div><div>In Australia, the military turban <em>Turbo militaris</em> Reeve 1848 is culturally, commercially and recreationally fished. Fishery regulations include a bag limit of 20 snails and a minimum legal-size limit of 75 mm. Yet, there is limited biological knowledge to inform management. Mark−recapture surveys were used to assess growth and develop age-and-growth models for <em>T. militaris</em> at two subtropical (29.4 °S and 29.8 °S) and two temperate (both 32.7 °S) rocky shores in eastern Australia. Growth varied between subtropical and temperate regions separated by < 400 km. Temperate snails attained a larger asymptotic size than subtropical snails (108 mm vs 94 mm), a greater growth coefficient (<em>K</em>) (0.57 y⁻<sup>1</sup> vs 0.29 y⁻<sup>1</sup>), a higher rate of natural mortality (<em>M</em> = 0.57 y⁻<sup>1</sup> vs 0.37 y⁻<sup>1</sup>) and shorter lifespan (<em>T</em><sub>max</sub> = 5 years vs 10 years). Sexual maturity (37 mm, 95 % CI: 35–39 mm) was attained by temperate snails at 0.7 years (range: 0.7–0.8 years), allowing ∼1.5 years before entering the fishery. In contrast, subtropical snails reach sexual maturity at 1.7 years (range: 1.6–1.8 years), having ∼4.4 years before reaching the harvestable size. Our findings indicate that current minimum legal-size limits are appropriate across the fishery for ensuring population replenishment. Yet, climate change may impact the growth pattern of <em>T. militaris</em>. The fast-growth and shorter lifespan of temperate snails suggests greater resilience to environmental stressors due to higher population turnover. In contrast, subtropical snails likely have slower population recovery, reflecting greater vulnerability to stressors or depletion by overfishing.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"291 ","pages":"Article 107521"},"PeriodicalIF":2.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027382","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}
Fisheries ResearchPub Date : 2025-09-09DOI: 10.1016/j.fishres.2025.107518
Timothy J. Emery, Rocio Noriega, Mahdi Parsa, Don Bromhead, Trent Timmiss
{"title":"The capability of electronic monitoring to measure logbook reporting performance and improve data for scientific analyses","authors":"Timothy J. Emery, Rocio Noriega, Mahdi Parsa, Don Bromhead, Trent Timmiss","doi":"10.1016/j.fishres.2025.107518","DOIUrl":"10.1016/j.fishres.2025.107518","url":null,"abstract":"<div><div>Electronic monitoring (EM) systems are used to collect fisheries dependent data to support scientific analyses and management decision-making. In Australian Commonwealth fisheries, EM is also used to validate and improve logbook data reporting at the individual vessel level through the provision of consistent feedback to fishers on their logbook reporting. We compared five years of EM and logbook reported catch numbers for both retained and discarded key tuna and billfish species and, interactions with endangered, threatened and protected (ETP) species in the Australian Eastern Tuna and Billfish Fishery (ETBF). This was undertaken to examine congruence at an individual vessel level and determine how both EM and logbook reporting can potentially be improved in the future. At a fleet-wide level, overall congruence was higher for retained than discarded catch and higher for ETP groups (i.e., seabirds) than at an ETP species (i.e., wandering albatross) taxonomic level. Importantly, vessel-level estimates of congruence revealed significant inter-vessel variation in logbook reporting performance. For example, a small number of vessels were not reporting any bycatch and discards despite EM analysts observing these occurrences on these vessels, whilst other vessels had perfect congruence for some species across all audited sets. These results highlight the capability of EM to identify vessels with general (i.e. universal) or specific (e.g. particular species) logbook reporting deficiencies, that enable managers to undertake either incentive-based, education-based or (where required) compliance-based targeted actions to ensure that those vessels improve their future logbook reporting. Ultimately this approach will improve data inputs for scientific analyses and the fisheries management decisions that rely on them.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"291 ","pages":"Article 107518"},"PeriodicalIF":2.3,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027381","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}
Fisheries ResearchPub Date : 2025-09-09DOI: 10.1016/j.fishres.2025.107524
Chloe Ramsay , Matthew D. Campbell , Beverly Sauls
{"title":"A meta-analysis of immediate and delayed discard mortality of red snapper (Lutjanus campechanus)","authors":"Chloe Ramsay , Matthew D. Campbell , Beverly Sauls","doi":"10.1016/j.fishres.2025.107524","DOIUrl":"10.1016/j.fishres.2025.107524","url":null,"abstract":"<div><div>Red snapper (<em>Lutjanus campechanus)</em> is an economically important fishery in the Gulf of America (formerly the Gulf of Mexico). This species is subject to discard mortality due to barotrauma. Novel discard mortality research on this species has estimated delayed mortality in addition to immediate mortality at the surface (<em>i.e.,</em> swim or float). To determine how this combined mortality measurement changes red snapper discard mortality, we conducted a meta-analysis, combining 11 studies, with 92 distinct estimates from 34 years of research. We assessed if depth, season, release method, or region predict discard mortality. We found a significant positive relationship between depth and discard mortality and that, in the western Gulf, fishing in the summer significantly increases discard mortality compared to fishing in other seasons and regions. Analysis of studies with well-defined release method treatments revealed that venting and descending generates a 14.6 % decrease in estimated release mortality compared to no barotrauma mitigation. We estimate a 31 % discard mortality at 33 m, the median fishing depth of the private recreational fleet; this is more than double the discard mortality estimate generated by a previous meta-analysis based on immediate mortality alone. Given that we generated estimates from both immediate mortality and delayed mortality, we propose that these updated, higher estimates of discard mortality are more representative of the mortality experienced by this recreational fishery.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"291 ","pages":"Article 107524"},"PeriodicalIF":2.3,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021016","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}
Fisheries ResearchPub Date : 2025-09-06DOI: 10.1016/j.fishres.2025.107520
Juan Carlos Cerros-Cornelio , Rafael Flores-Garza , Alma Rubí Castrejón-Ríos , Jesús Guadalupe Padilla-Serrato , Pedro Flores-Rodríguez , Carmina Torreblanca-Ramírez , Carmen Rodríguez-Jaramillo , José Luis García-Corona
{"title":"Seasonal dynamics of the reproductive effort and first maturity of Chinese hat snails Trochita trochiformis (Born, 1778) in Guerrero, Mexico: Towards a sustainable fishery management","authors":"Juan Carlos Cerros-Cornelio , Rafael Flores-Garza , Alma Rubí Castrejón-Ríos , Jesús Guadalupe Padilla-Serrato , Pedro Flores-Rodríguez , Carmina Torreblanca-Ramírez , Carmen Rodríguez-Jaramillo , José Luis García-Corona","doi":"10.1016/j.fishres.2025.107520","DOIUrl":"10.1016/j.fishres.2025.107520","url":null,"abstract":"<div><div>The Chinese hat snail <em>Trochita trochiformis</em> is a valuable gastropod for artisanal fisheries on the southeast coast of Guerrero, in the Mexican Pacific. The knowledge of the reproductive biology of this species is of the utmost importance to assess the renewal capacity of natural stocks, thus ensuring sustainable management strategies, particularly in the case of this heavily exploited resource. Here, we investigated gametogenesis, reproductive effort and the size at first maturity of <em>T. trochiformis</em> over a 2-year cycle using qualitative and quantitative histological techniques. Gonad development was classified into 6 different stages for both males and females, ranging from immature to spent sexual structures. Moreover, the first records of protandric sex reversal were reported for this species. Snails were able to reproduce throughout the year, with maximum peaks of gonad development occurring during winter at minimal sea surface temperatures of around 27 °C; whereas spawning and short periods of gametogenic inactivity were observed with rising temperatures (27 °C to ∼31 °C) through spring and summer. The results suggest that female gonads have superior breeding capacity than males, yielding the highest oocyte quality during winter. Shell diameter at first maturity (<em>SD</em><sub>50</sub>) was estimated for the first time for this species at 44.8 mm for females, and 45.4 mm for males. Therefore, females are prone to overfishing since nearly 12 % of males changed to females after adult size in this study. Based on these results, two management measures could be applied: 1) a banning period from December to February during the season of greatest reproductive effort, and 2) an initial minimal capture size of ∼45 mm, thus allowing the snails to spawn at least once during the reproductive cycle.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"291 ","pages":"Article 107520"},"PeriodicalIF":2.3,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007519","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}
Fisheries ResearchPub Date : 2025-09-06DOI: 10.1016/j.fishres.2025.107519
Chollett I , S. O’Farrell , L. Perruso , S.R. Sagarese , C. Liese , K. Dettloff
{"title":"Applications of vessel positional data in next-generation stock assessments","authors":"Chollett I , S. O’Farrell , L. Perruso , S.R. Sagarese , C. Liese , K. Dettloff","doi":"10.1016/j.fishres.2025.107519","DOIUrl":"10.1016/j.fishres.2025.107519","url":null,"abstract":"<div><div>Stock assessments constitute the foundation of sustainable fisheries management. Stock assessments, traditionally single-stock, non-spatial, and focusing on the biology, abundance and catch components of the fisheries, can be enhanced with additional information from fishery-dependent sources to provide a more accurate picture of stock status and promote positive management outcomes. We conducted a literature review to assess the potential of vessel positional data to help improve or augment stock assessments, expand stock assessments into the spatio-temporal realm, and better integrate human dimensions of fishing into the assessment process. We cataloged the kaleidoscope of variables that can be extracted from vessel positional data to describe fishing activity, and the methods implemented for their calculation. We found that positional data can be used to inform traditional stock assessments by (1) improving indices of fishing effort and stock abundance traditionally calculated using logbook data; (2) mapping the catch component and quantify fishing effort, fishing extent, spatial aggregation, CPUE, catch, landings, bycatch and discards; (3) understanding the individual and collective behavior of fishers, and their change after natural and policy disturbances. The rich information derived from vessel positional data can be used quantitatively to support region-specific stock assessments or as inputs to spatially-explicit stock assessment models. If not used quantitatively, the information can be used during model development and interpretation. These innovative applications involve no additional data-collection cost and utilize straightforward analyses of near-real-time, accurate, fishery-dependent data gathered within the existing management infrastructure.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"291 ","pages":"Article 107519"},"PeriodicalIF":2.3,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007520","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}