Fisheries Research最新文献

{"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}

{"title":"Evaluation of the swimming crab (Callinectes toxotes Ordway, 1863) as an alternative resource to traditional fishing in the Colombian Pacific","authors":"Juan José Gallego-Zerrato ,&nbsp;Brenda Natalia Londoño ,&nbsp;Diego Fernando Córdoba-Rojas ,&nbsp;Alan Giraldo","doi":"10.1016/j.fishres.2025.107303","DOIUrl":"10.1016/j.fishres.2025.107303","url":null,"abstract":"<div><div>Swimming crabs of the genus <em>Callinectes</em> (Portunidae) inhabit coastal areas in tropical and temperate regions of the Atlantic and Pacific Oceans, where they represent an important fishery resource and an alternative to fishing. In this study, the biology of the swimming crab (<em>Callinectes toxotes</em>) was evaluated as well as its fishery potential for the town of Pizarro, Colombian Pacific. Samples were collected monthly from December 2021 to October 2022, using 30 crab traps (“chayos”) and two-ring crab traps, distributed along six stations on the banks of the Baudó River. Records of temperature, salinity, dissolved oxygen, and pH were also taken. Biological-fisheries analyses followed the ELEFAN I routine, estimating K and L∞ to assess natural mortality (M), fishing mortality (F), and exploitation rate (E). A total of 572 specimens (344 males and 228 females) were captured, of which approximately 70 % were immature. The L50 of males and females was estimated at 108.4 mm and 108.5 mm width at the base of the lateral spines, respectively; sexual proportion was significantly different from 1:1, with more males than females. This is the first study to be undertaken in the Pacific Chocó region of Colombia and the first to establish a concise and reproducible method that can be compared with other studies worldwide. Moreover, this study establishes a baseline to explore the swimming crab fishery resource in the area and provides a starting point to undertake similar studies in the Colombian Pacific.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"283 ","pages":"Article 107303"},"PeriodicalIF":2.2,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465286","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":"Predator responses in recreational fishing: Assessing selective pressure of bait types on behavioral diversity in northern pike (Esox lucius)","authors":"Jorrit Lucas ,&nbsp;Albert Ros ,&nbsp;Juergen Geist ,&nbsp;Alexander Brinker","doi":"10.1016/j.fishres.2025.107299","DOIUrl":"10.1016/j.fishres.2025.107299","url":null,"abstract":"<div><div>This study investigated the predatory behavior of northern pike in response to trolling with natural and artificial baits using underwater cameras. Predator types of 32 captured pike were identified based on their coping style under altered environmental conditions by measuring latency to forage in individual novel net enclosures. Fast-attacking pike during angling were more likely to forage in the enclosures than slow-attacking conspecifics. Bait type influenced attack latency, with soft plastic baits being attacked faster than natural baits. Pike biting the artificial bait exhibited a faster defensive response compared to the natural bait; however, the likelihood of capture was not affected. The results suggest that wild pike exhibit variability in coping styles, i.e. different responses to environmental changes, which are related to their vulnerability to angling. In consequence, bait selectivity, due to more proactive predators attacking soft plastic baits less hesitantly than their reactive counterparts, may influence pike populations even within the same fishing technique. Recreational fishery management should consider the behavioral diversity within pike populations to maintain genetic integrity and contribute to both angler satisfaction and ecosystem function.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"283 ","pages":"Article 107299"},"PeriodicalIF":2.2,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453997","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":"Bitter crab disease dynamics in eastern Bering Sea Tanner and snow crab: An underestimated and emergent stressor","authors":"Erin J. Fedewa ,&nbsp;Pamela C. Jensen ,&nbsp;Hamish J. Small ,&nbsp;Michael A. Litzow ,&nbsp;Michael J. Malick ,&nbsp;Leah S. Zacher ,&nbsp;W. Christopher Long ,&nbsp;Stan Kotwicki","doi":"10.1016/j.fishres.2025.107307","DOIUrl":"10.1016/j.fishres.2025.107307","url":null,"abstract":"<div><div>Tanner crab (<em>Chionoecetes bairdi</em>) and snow crab (<em>C. opilio</em>) populations in the eastern Bering Sea have reached historic lows in recent years, and declines have been linked to recruitment failures and mortality events. Bitter crab disease, caused by a parasitic dinoflagellate (<em>Hematodinium</em> sp.), contributes to high mortality rates in Tanner and snow crab, and outbreaks have the potential to reduce recruitment and population productivity. Here, we employed a polymerase chain reaction assay to detect <em>Hematodinium</em> sp. in Tanner and snow crab hemolymph samples to: 1) evaluate testing accuracy of visual disease detection methods; 2) estimate bitter crab disease prevalence from 2015 to 2017 in eastern Bering Sea monitoring sites; and 3) identify factors influencing the likelihood of <em>Hematodinium</em> sp. infection. Our results indicated that visual diagnostic methods failed to detect 93 % of infections, and underestimated disease prevalence by up to 90 %. Infection risk was highly dependent on host size, sex and sampling date. Small Tanner crab (&lt;30 mm carapace width) were nearly twice as susceptible to infection, and female snow crab were 9 % more likely to be infected than males. Most notably, bitter crab disease prevalence exceeded 50 % at two monitoring sites during the study period, and annual disease prevalence increased by approximately 10 % per year in both populations. We emphasize the severe population-level consequences for these high prevalence levels in eastern Bering Sea Tanner and snow crab stocks. Our approach highlights the critical importance of continued monitoring and mechanistic modeling of bitter crab disease in severely depressed crab populations.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"283 ","pages":"Article 107307"},"PeriodicalIF":2.2,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453996","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":"Broadband characteristics of Pacific herring (Clupea pallasii) and Pacific chub mackerel (Scomber japonicus) target strength identified using the tether method","authors":"Zi Wang ,&nbsp;Naizheng Yan ,&nbsp;Tohru Mukai ,&nbsp;Kohei Hasegawa ,&nbsp;Jun Yamamoto","doi":"10.1016/j.fishres.2025.107306","DOIUrl":"10.1016/j.fishres.2025.107306","url":null,"abstract":"<div><div>Target strength (TS) is essential for acoustic fish biomass estimation. Traditional narrowband surveys, which are constrained by single-frequency TS measurements, limit species identification. In contrast, broadband technology, which utilises continuous frequency ranges, enhances differentiation through TS frequency response. The aim of this study was to investigate whether the structural differences in swim bladders between physostomous and physoclistous fish produce distinguishable TS characteristics. Pacific herring (<em>Clupea pallasii</em>) and Pacific chub mackerel (<em>Scomber japonicus</em>) were selected to represent physostomous and physoclistous species, respectively. TS measurements were conducted using the tether method in freshwater and seawater tanks, employing calibrated split-beam quantitative echo sounders (Simrad EK80 scientific echosounder system) within the range of 45–260 kHz. After the acoustic measurements, the theoretical TS estimated by the Kirchhoff ray mode model was compared with the measured results. The maximum TS_cm increased with increasing L/λ (ratio of length (L) to wavelength (λ)) for both species. The tilt angle distribution was assumed to be represented by a normal distribution (mean value: −5°, standard deviation: 15°) regarding average TS_cm. Pacific herring showed an overall decreasing trend, whereas Pacific chub mackerel showed no significant trend. At L/λ &lt; 4.5, significant differences were observed in maximum and average TS_cm and L/λ characteristics, with Pacific herring exhibiting a marked decrease and Pacific chub mackerel showing a slight increase. These results may improve the accuracy of fishery resource assessments of these two species, assist in their identification, and provide a reference for differentiating between physostomous and physoclistous fish.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"283 ","pages":"Article 107306"},"PeriodicalIF":2.2,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445951","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}