Fisheries Research最新文献

{"title":"Does increased complexity improve performance: Evaluating a constrained biomass dynamics model and an empirical harvest control rule","authors":"Pia Bessell-Browne ,&nbsp;André E. Punt ,&nbsp;Miriana Sporcic ,&nbsp;Geoffrey N. Tuck ,&nbsp;L. Richard Little","doi":"10.1016/j.fishres.2025.107317","DOIUrl":"10.1016/j.fishres.2025.107317","url":null,"abstract":"<div><div>Biomass dynamics models are a common stock assessment method applied in-data limited situations. We present a management strategy based on a new constrained biomass dynamics model (‘dynamic tier 4’) as an alternative to the currently applied empirical management strategy (‘empirical tier 4’) used in Australia’s Southern and Eastern Scalefish and Shark Fishery (SESSF). The dynamic tier 4 management strategy is constrained because the biomass dynamics model on which it is based involves the assumption that yield corresponding to the biomass target occurred during a pre-specified set of reference years. This is the same assumption that is made by the empirical tier 4 management strategy. Management strategy evaluation is used to evaluate performance among three ways of accounting for error when fitting the dynamic tier 4 approach, and to evaluate performance against the empirical tier 4 management strategy as well as a management strategy based on an integrated assessment implemented using Stock Synthesis (‘tier 1’). Finally, the sensitivity of the empirical tier 4 and dynamic tier 4 management strategies to an incorrect choice for the pre-specified reference years is explored. The results demonstrate improved performance by the dynamic tier 4 management strategy compared to the empirical tier 4 management strategy. As expected, the data-rich, tier 1 management strategy had the best performance. The dynamic tier 4 management strategy has a reduced probability of the stock falling below the limit reference point, reduced catch variability and is less sensitive to incorrect reference year choice than the empirical tier 4 management strategy. These results demonstrate that the dynamic tier 4 management strategy is a suitable alternative to the empirical tier 4 management strategy in the SESSF, and more generally, can be considered as a robust option for forming the basis for management recommendations for data-limited situations.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"284 ","pages":"Article 107317"},"PeriodicalIF":2.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548392","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":"The complex age and growth of Chloroscombrus chrysurus: Formation of two increments per year in the otolith and biphasic growth","authors":"Kathleen Angélica Rautenberg ,&nbsp;Dimitris V. Politikos ,&nbsp;Eduardo Luis Cupertino Ballester ,&nbsp;Paulo Ricardo Schwingel ,&nbsp;André Martins Vaz-dos-Santos","doi":"10.1016/j.fishres.2025.107322","DOIUrl":"10.1016/j.fishres.2025.107322","url":null,"abstract":"<div><div>Fish age and growth are essential information for fisheries management and ecological assessment. <em>Chloroscombrus chrysurus</em> is a small pelagic fish distributed along both margins of the Atlantic Ocean, with a key ecological role and fishery relevance. In the Southeastern Brazilian Bight (21°S-28°40'S), it is one of the three main target species of the industrial purse seine fishery, and there is no detailed study of its sagitta otolith focusing on age structure and growth pattern in this area. To this end, a dataset of 1009 otoliths from individuals ranging from 155 to 400 mm TL was analyzed. Techniques to assess the relative growth and absolute growth were used. Both techniques revealed a biphasic growth pattern. The stanza changing point in the otoliths corresponds to a total length of 245.43 mm. Two increments (translucent zones) are formed in the otolith per year. Up to eight increments were observed, corresponding to ages ranging from 0.8 to 4.5 years. The biphasic von Bertalanffy growth model best described the growth of the species: <span><math><mrow><mi>TL</mi><mo>=</mo><mn>356.10</mn><mspace></mspace><msub><mrow><mi>A</mi></mrow><mrow><mi>t</mi></mrow></msub><mo>[</mo><mn>1</mn><mo>−</mo><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo><mn>0.758</mn><mspace></mspace><mrow><mfenced><mrow><mi>t</mi><mo>+</mo><mn>0.0027</mn></mrow></mfenced></mrow></mrow></msup><mo>]</mo></mrow></math></span>, <em>t</em>_<em>h</em> = 2.32 years, <em>h</em> = 0.180. The total length and age of the transitional growth phase correspond to the total length at which all individuals are adults (<em>TL</em>_<em>100</em>), indicating a rapid growth pattern during first maturity, followed by relatively stable length in older individuals. These results represent a novel approach to age and growth of <em>C. chrysurus</em> and provide a standard for accurate age estimation based on otolith analysis for small and medium-sized pelagic species.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"284 ","pages":"Article 107322"},"PeriodicalIF":2.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548394","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":"Assessing the applicability of diver-based surveys for monitoring fish populations in lentic lakes","authors":"Michaela Holubová ,&nbsp;Jiří Richta ,&nbsp;Martin Čech ,&nbsp;Lukáš Vejřík ,&nbsp;Vladislav Draštík ,&nbsp;Luboš Kočvara ,&nbsp;Jiří Peterka","doi":"10.1016/j.fishres.2025.107308","DOIUrl":"10.1016/j.fishres.2025.107308","url":null,"abstract":"<div><div>Giving the increasing degradation of aquatic ecosystem, it is important to prioritise harmless methods when selecting appropriate research gear. This study confirmed that Underwater Visual Census (UVC) using SCUBA divers and parallel, depth-stratified transects can produce results comparable to standardized gillnet sampling in terms of fish species proportions in lentic freshwater ecosystems with sufficient water transparency. The proportions of young-of-the-year (YOY) fish were similar between the two methods. In older fish, the species proportions showed minor, non-significant variations between methods. Despite some variability in performance during UVC surveys, this variation is not necessarily indicative of an error but may reflect natural fluctuations in fish distribution. Notably, UVC detected a significantly higher number of fish individuals compared to gillnets. Our findings suggest that UVC is a viable, non-invasive alternative to gillnets for surveying nearshore fish populations, providing comparable data quality with negligible impact on the fish community.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"284 ","pages":"Article 107308"},"PeriodicalIF":2.2,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548393","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":"Below and beyond the species: DNA tools for geographic traceability analysis of cod products in European markets","authors":"Marine Cusa ,&nbsp;Peter Shum ,&nbsp;Rob Ogden ,&nbsp;Charles Baillie ,&nbsp;Stefano Mariani","doi":"10.1016/j.fishres.2025.107302","DOIUrl":"10.1016/j.fishres.2025.107302","url":null,"abstract":"<div><div>DNA technology has been shown as an effective tool to monitor seafood trade and improve transparency. It has highlighted seafood species mislabelling on a global scale and has attracted the interest of policy makers, government authorities, and other stakeholders. Despite the proven success of genetic methods in seafood traceability, studies exploring the mislabelling of geographic catch location within a species remain rare. Accurately disclosing the catch location of wild-caught fish is crucial for sustainable seafood management, but verifying this information remains difficult. Tools to evaluate catch location are on the rise and offer an unprecedented opportunity to expand investigations of seafood mislabelling. Diagnostic Single Nucleotide Polymorphisms (SNPs) have been used extensively in the context of population genetics and have the potential to reveal trends in seafood fraud. In this study, we demonstrate the efficiency of a set of nine diagnostic SNPs for the identification of two heavily harvested cod populations, the Northeast Arctic cod and the North Sea cod, and conduct a market analysis of catch location mislabelling of Atlantic cod sold in four European countries. Our findings suggest that inexpensive, diagnostic molecular tools can effectively monitor mislabeling in catch locations and discuss how the method can be enhanced to minimize errors and maximize utility, towards strengthening governance, enhancing sustainability, and boosting consumer trust.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"284 ","pages":"Article 107302"},"PeriodicalIF":2.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534763","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":"How to deal with confiscated European eels (Anguilla anguilla L.) destined for reintroduction?","authors":"Pieterjan Verhelst ,&nbsp;John Hellmann ,&nbsp;Florian M. Stein","doi":"10.1016/j.fishres.2025.107309","DOIUrl":"10.1016/j.fishres.2025.107309","url":null,"abstract":"<div><div>Illegal trafficking of critically endangered European eels (<em>Anguilla anguilla</em> L.) to Asia for consumption is a lucrative business and considered to be Europe’s most significant illegal wildlife trade in terms of monetary value. Consequently, international and national authorities take action to intercept traffickers and confiscate glass eels. While there are potential biosecurity risks by reintroducing the eels into the wild such as pathogen spread, there are currently no guidelines on how to deal with large numbers of confiscated glass eels. In our work we provide such guidelines to put the eels in quarantine and test them for pathogens but also species identification. The latter is not only necessary to prevent the introduction of non-native species, it can also be a necessity in court. Nonetheless we stress the need for a European standard on eel quarantine and both pathogen and molecular species identification testing. In addition, due to the lack of knowledge on pathogen impacts and the effectiveness of glass eel restocking, urgent research on that front is needed to implement effective reintroduction measures.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"284 ","pages":"Article 107309"},"PeriodicalIF":2.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527025","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":"Retention of larval fish driven by flooding tide in a remote atoll lagoon in the South China Sea","authors":"Zhongbo Miao ,&nbsp;Wentong Xia ,&nbsp;Ying Lu ,&nbsp;Yiqing Song ,&nbsp;Songguang Xie","doi":"10.1016/j.fishres.2025.107318","DOIUrl":"10.1016/j.fishres.2025.107318","url":null,"abstract":"<div><div>Retention of fish larvae in an optimal habitat is essential for successful recruiting fish populations. Atoll lagoons may serve as ideal retention areas for fish larvae. We used plankton nets to investigate larval fish assemblages during flooding and ebbing tides in a water-passage inside the Yongle Atoll Lagoon in the South China Sea in May 2022 to reveal the patterns of fish larvae exchanges between the lagoon and the ocean. We collected a total of 186 species/taxa, which were mainly composed of Pomacentridae (21 taxa, 12.3 % total individuals), followed by Apogonidae (18, 6.2 %), Gobiidae (17, 7.4 %), Lutjanidae (15, 5.8 %), Labridae (11, 16.9 %), and Myctophidae (9, 12.6 %). Species richness and density were higher during flooding tide at night (140 taxa, 129.5 ind. / 100 m³) than that during ebbing tide at night (99 taxa, 22.7 ind. / 100 m³), followed by flooding tide at day (42 taxa, 10.0 ind. / 100 m³) and ebbing tide at day (5 taxa, 1.6 ind. / 100 m³). Thus, more fish larvae were transported into the lagoon through flooding tides than those washed out through ebbing tides, as well as at night compared to during daytime. This demonstrated the retention function of the lagoon driven by a combination of flooding tide and the nocturnal activity of fish larvae. Our results suggested that the protection of atoll lagoons in open oceans should be further emphasized not only for their high biodiversity but also for their potential role in providing retention habitats and consequently enhancing recruitment of fish populations.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"284 ","pages":"Article 107318"},"PeriodicalIF":2.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520348","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":"The International Conference and Workshop on Lobster Biology and Management returns to Western Australia!","authors":"Nick Caputi,&nbsp;Nic Sofoulis,&nbsp;Matt Taylor,&nbsp;Simon de Lestang","doi":"10.1016/j.fishres.2025.107292","DOIUrl":"10.1016/j.fishres.2025.107292","url":null,"abstract":"","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"283 ","pages":"Article 107292"},"PeriodicalIF":2.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510563","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":"Conserving the genetic resources of Rita rita: A GIS-mapping based approach","authors":"Muhammad Waseem,&nbsp;Khalid Abbas,&nbsp;Taqwa Safdar,&nbsp;Muhammad Sarfraz Ahmed,&nbsp;Noreen Asghar,&nbsp;Zahida Rasheed,&nbsp;Sumra Naz","doi":"10.1016/j.fishres.2025.107301","DOIUrl":"10.1016/j.fishres.2025.107301","url":null,"abstract":"<div><div>Understanding the genetic status and spatial distribution of fish species is essential for the conservation and management of their genetic resources. Anthropogenic factors, including hydrological alterations, pollution, overexploitation, deforestation, and the introduction of non-native species, have led to a gradual decline in genetic diversity. In this pioneering study, we investigate the integration of genetic diversity data with spatial statistical tools to map the genetic diversity of wild <em>Rita rita</em> stocks in the River Jhelum, Pakistan. Samples were collected from eight selected sites, and cross-species amplification was conducted using ten microsatellite loci. The Inverse Distance Weighting (IDW) algorithm was applied in ArcGIS 10.2 to generate genetic diversity maps. The study recorded the number of alleles <em>(Na)</em> and allelic richness <em>(Ar)</em> ranging from 3.20 to 4.00, for both <em>Na</em> and <em>Ar.</em> The effective number of alleles <em>(Nae)</em> averaged between 2.459 and 3.506, while observed and expected heterozygosity ranged from 0.640 to 0.724 and 0.526–0.665, respectively. Inbreeding coefficient values varied from −0.077–0.115. A significant departure from Hardy-Weinberg Equilibrium <em>(HWE)</em> was noted in 17 out of 80 tests. Statistically significant <em>F</em>_<em>ST</em> values demonstrated significant differentiation among population pairs. Analysis of Molecular Variance <em>(AMOVA)</em> indicated that only a small percentage (3.911 %) of the variation existed among stocks. The findings reveal a low level of genetic diversity in the assessed fish stocks, likely attributed to changes in stock dynamics due to climate change and genetic drift resulting from habitat fragmentation. Understanding the genetic structure of <em>R. rita</em> stocks offers valuable insights for genetic improvement programs, effective management practices, and the long-term preservation of riverine genetic resources.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"284 ","pages":"Article 107301"},"PeriodicalIF":2.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509950","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":"Impacts of artisanal fishing on elasmobranchs along the Brazilian Amazon Coast","authors":"Keyton Kylson Fonseca Coelho ,&nbsp;Getulio Rincon ,&nbsp;Natascha Wosnick ,&nbsp;Carlos Henrique Marinho dos Santos Filgueira ,&nbsp;Rafaela Maria Serra de Brito ,&nbsp;Ana Rita Onodera Palmeira Nunes ,&nbsp;Jorge Luiz Silva Nunes","doi":"10.1016/j.fishres.2025.107304","DOIUrl":"10.1016/j.fishres.2025.107304","url":null,"abstract":"<div><div>This study aimed to identify the most commonly used artisanal fishing gear for capturing elasmobranchs along the coast of Maranhão State, within the Brazilian Amazon Coast. Interviews were conducted with 314 fishers across 17 coastal municipalities using semi-structured questionnaires. These gathered information on vessel characteristics, fishing gear, and elasmobranch species caught in the region. Six types of fishing gear were identified, with gillnets and longlines being the most frequently used. Of the 70 elasmobranch species identified along the Brazilian Amazon Coast, 35 are commonly captured. Among rays, the species most frequently cited by fishers were <em>Hypanus guttatus</em>, <em>Rhinoptera bonasus</em>, <em>Hypanus geijskesi</em>, <em>Aetobatus narinari</em>, <em>Gymnura micrura</em>, <em>Mobula hypostoma</em>, <em>Mobula birostris</em>, and <em>Pseudobatos percellens</em>. For sharks, the most frequently mentioned species included <em>Carcharhinus acronotus</em>, <em>Sphyrna tudes</em>, <em>Carcharhinus leucas</em>, <em>Ginglymostoma cirratum</em>, <em>Galeocerdo cuvier</em>, <em>Rhizoprionodon porosus</em>, and <em>Carcharhinus porosus</em>. Notably, all identified species are susceptible to capture by both gillnets and longlines. To mitigate the impact of these practices on population stocks, particularly for species threatened with extinction, it is essential to develop targeted conservation measures and management plans that address fishing gear, capture areas, and most vulnerable species.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"284 ","pages":"Article 107304"},"PeriodicalIF":2.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509553","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":"Standardization of commercial catch data from multiple gears in mixed fisheries accounting for preferential sampling, catchability, and fishing effort","authors":"Alexis Lazaris ,&nbsp;George Tserpes ,&nbsp;Stefanos Kavadas ,&nbsp;Evangelos Tzanatos","doi":"10.1016/j.fishres.2025.107305","DOIUrl":"10.1016/j.fishres.2025.107305","url":null,"abstract":"<div><div>Commercial fisheries constitute a valuable source of high-resolution information that can aid in assessing stocks and establishing management schemes. Especially, multi-gear and multi-species fisheries can provide fine-scale insights in space and time with regards to the patterns in species distribution and abundance as well as to the comparative behavior of the fishing gears deployed. In this work we propose a Generalized Additive Modeling framework to standardize catch data collected through observer monitoring programs using a 2018–2021 dataset from the eastern Ionian (Mediterranean Sea, FAO GFCM GSA20) as a case study of data-poor mixed fisheries. Our framework extends the standardization procedures by accounting for preferential sampling, integrating effort from multiple gears and jointly modeling species. We show that such an integration leads to more robust estimations of abundance for both target and by-catch species as well as decreases inference uncertainty. Regarding single stocks, the identification of the independent effect of factors (e.g. spatial, temporal, fishing effort, gear, skipper effect) can aid in monitoring and management decisions; furthermore, an objective index of abundance is estimated that can be used to infer inter-annual trends from more extended time-series useful for stock assessments. Using standardized catch values, we have generated seasonal maps of species distribution and multiple-species persistence hotspots that are useful for designing spatiotemporal management restrictions and also informative of species ecology. We also address the effect of the technical (selectivity) and behavioral aspects of the fishing gears to inform gear-based management. Finally, we demonstrate how this broad inferential process can be condensed to form species assemblages (based on their shared responses on drivers of catch and abundance) as well as fishing gear assemblages (based on their catch profiles and the apparent heterogeneity between vessels deploying common gears) that can act as units of reference for management. Apart from an objective estimation of stock abundance in time and space, our standardization framework illustrates how ecological, technical and behavioral aspects of mixed fisheries can be collectively evaluated to inform stock assessment and management.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"284 ","pages":"Article 107305"},"PeriodicalIF":2.2,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480424","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}