Fisheries Research最新文献

{"title":"Modeling spatio-temporal dynamics of Patagonian toothfish spawning in Kerguelen waters using CPUE data","authors":"Fanny Ouzoulias,&nbsp;Clara Péron,&nbsp;Félix Massiot-Granier","doi":"10.1016/j.fishres.2025.107422","DOIUrl":"10.1016/j.fishres.2025.107422","url":null,"abstract":"<div><div>The act of spawning of fish can be influenced by a variety of factors, including environmental conditions and human activities, particularly fishing. Patagonian toothfish (<em>Dissostichus eleginoides</em>) is a commercially exploited fish species, occupying the southern Patagonian and Chilean shelves, as well as the sub-Antarctic submarine plateaux. It is characterized by a late maturity and slow body growth, which are key considerations in its management and conservation. In this study, we investigated the spatio-temporal dynamics of Patagonian toothfish spawners in the Kerguelen region using fishery observer data, from 2020 to 2024. We predicted spawner hotspots and seasonal trends of spawner abundance using spatially-explicit Generalized Additive Models (GAMs) that modeled the spawner CPUE (Catch Per Unit of Effort). Our results suggest that toothfish female spawners aggregate at specific locations from early June to the end of July. Hotspots of male spawners were found from mid-June to mid-July and then from mid-August to mid-September. The main spatial overlap between male and female spawner hotspots is located on the western slopes and the north of Skiff bank (along the 1500 m isobath) and in the north-western region (near the 500 m isobath). Our findings enabled the formulation of hypotheses concerning the ecological drivers influencing Patagonian toothfish spawning and emphasize the importance of considering seasonal localized closures to avoid mortality and disturbance during spawning.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"288 ","pages":"Article 107422"},"PeriodicalIF":2.2,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144366685","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":"Letter to the Editor re: Ryznar, E.R., & Litzow, M.A. (2024). “Predicting the distribution of red king crab bycatch in Bering Sea flatfish trawl fisheries” [Fisheries Research 279, 107158]","authors":"André E. Punt,&nbsp;Beatriz Morales-Nin","doi":"10.1016/j.fishres.2025.107425","DOIUrl":"10.1016/j.fishres.2025.107425","url":null,"abstract":"<div><div>The Journal received a letter from Sarah Webster and John Gauvin following the publication of Ryznar and Litzow (2024). Following the journal procedure we provide the letter from Webster and Gauvin, the response from Ryznar and Litzow, and a rebuttal to the response from Webster and Gauvin.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"288 ","pages":"Article 107425"},"PeriodicalIF":2.2,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322543","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":"Development of a spatiotemporally integrated per-recruit model for Southern Flounder in the northern Gulf of America","authors":"Calvin Chee,&nbsp;Patrick M. Graham,&nbsp;Robert T. Leaf","doi":"10.1016/j.fishres.2025.107444","DOIUrl":"10.1016/j.fishres.2025.107444","url":null,"abstract":"<div><div>Southern Flounder, <em>Paralichthys lethostigma</em>, is an important fish in the northern Gulf of America and has declined throughout its range. In this work, we evaluate a spatially- and temporally-integrated per-recruit model by incorporating information on movement dynamics and spatial differences in fishing pressure. A total of n = 80 Southern Flounder were tagged in Saint Louis Bay, Mississippi with acoustic transmitters. We classified n = 11 individuals as migrators, these individuals exhibiting movement to offshore spawning locations, and n = 16 individuals as residents, these individuals overwintering in inshore habitats. Incorporating the total proportion of migrators, timing of egress from inshore habitats, and differences between inshore and offshore fishing pressure into the spatiotemporally integrated per-recruit model resulted in changes to reference points. In the traditional per-recruit model, at Mississippi’s current minimum size limit of 305 mm, F_0.4 = 0.41 y⁻¹ and F_max = 0.78 y⁻¹; at a size limit of 381 mm, reference points increase to F_0.4 = 0.64 y⁻¹ and F_max = 1.12 y⁻¹. Under the current 305 mm size limit, F_0.4 = 0.41 y⁻¹ and F_max = 0.78 y⁻¹ in the traditional model, while F_0.4 = 0.27 y⁻¹ and F_max = 0.52 y⁻¹ in the integrated model. These contrasts indicate that the stock is more vulnerable when movement is explicitly considered in the model. The results of both traditional and spatiotemporally integrated per-recruit models indicate that changes to the current management regime could benefit the Southern Flounder stock.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"288 ","pages":"Article 107444"},"PeriodicalIF":2.2,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322542","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":"Climate stressors, food security, and participation decisions among women in seafood production systems","authors":"Neville N. Suh ,&nbsp;Richard A. Nyiawung","doi":"10.1016/j.fishres.2025.107440","DOIUrl":"10.1016/j.fishres.2025.107440","url":null,"abstract":"<div><div>If properly managed, seafood production systems can provide a sustainable and climate-resilient source of nutrient and protein-rich food and employment for millions of people in coastal communities. However, seafood is declining due to myriad social, economic, and climate change stressors, affecting fishery-based livelihoods and the decision for some actors to continue harvesting. This study uses the case of small-scale women oyster harvesters in The Gambia to assess how fishery-based livelihood activities, climate stressors, climate adaptation, and household food security influence surveyed respondents' willingness to continue harvesting. Cross-sectional data were collected from 357 women oyster harvesters in 16 oyster communities in The Gambia. We show a negative association between willingness to continue with women oyster harvesters’ perception of increasing temperatures, increasing storms, and decreasing rainy days over a 5-year recall period. Similarly, we show a negative association between women oyster harvesters’ willingness to continue and food-insecure households. Meanwhile, a positive relationship was established between respondents' willingness to continue and participation in planting mangrove trees as a climate adaptation strategy. This study advances the argument for the need to pay attention to challenges facing seafood production systems and their sustainability now and in the future. The empirical evidence highlighted in this study provides a strong rationale for policies, strategies, and interventions that support climate-resilient seafood production systems, livelihood diversification, and food security in The Gambia and other developing countries.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"288 ","pages":"Article 107440"},"PeriodicalIF":2.2,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322541","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":"Influence of environmental drivers on the interannual variability of somatic growth of the southern blue whiting (Micromesistius australis) in the Southeastern Pacific Ocean","authors":"Claudeth Asencio González ,&nbsp;Guido Plaza ,&nbsp;Francisco Cerna","doi":"10.1016/j.fishres.2025.107441","DOIUrl":"10.1016/j.fishres.2025.107441","url":null,"abstract":"<div><div>Somatic growth in ectothermic vertebrates is an important indicator of population health. This study aimed to identify the influence of environmental drivers on the interannual variability of growth chronologies using linear mixed-effects models (LMM), for the Southern blue whiting (<em>Micromesistius australis</em>), a demersal fish of commercial importance in the Southeastern Pacific Ocean (SPO). Three separate growth chronologies were built based on a global (i.e., annuli), translucent and opaque band width of sagittal otoliths, over a 36-year period (1984–2019). A regime shift analysis (STARS) detected significant changes for the global growth chronology in 1993 and 1998, for the annual width of opaque zones in 1999 and for the annual width of translucent zones in 2013. LMMs showed that age was the main intrinsic factor affecting growth variability. However, extrinsic factors, such as the Pacific Decadal Oscillation (PDO), the El Niño-Southern Oscillation (ENSO) phenomenon, and sea surface temperature (SST), significantly influenced the seasonal growth of opaque bands. PDO had a negative effect on growth variability, while spring SST showed a positive correlation with opaque growth. ENSO negatively impacted seasonal growth, probably due to warming anomalies. A positive relationship was also found between chlorophyll-<em>a</em> concentration and growth. No relationship was observed between annual width of translucent zones and environmental drivers. The present study established the first standardized annual seasonal growth chronologies for <em>M. australis</em> in the SPO, identifying temperature as the main extrinsic driver triggering interannual somatic growth variation.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"288 ","pages":"Article 107441"},"PeriodicalIF":2.2,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313700","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":"Exploring the trophic strategies of two large pelagic species inhabiting the Galapagos Marine Reserve","authors":"Andrés Moreira-Mendieta ,&nbsp;Marjorie Riofrío-Lazo ,&nbsp;Jenifer Suarez-Moncada ,&nbsp;Diego Páez-Rosas","doi":"10.1016/j.fishres.2025.107442","DOIUrl":"10.1016/j.fishres.2025.107442","url":null,"abstract":"<div><div>We explored the trophic strategies of the broadbill swordfish (<em>Xiphias gladius</em>) and dolphinfish (<em>Coryphaena hippurus</em>) within the Galapagos Marine Reserve (GMR), using stable isotope analysis to infer habitat use and their trophic interactions. Muscle tissue samples were collected after the seizure of an illegal fishing boat in 2018. We observed interspecific differences in δ¹³C and δ¹⁵N signatures, suggesting different feeding patterns between species. <em>X. gladius</em> exhibited a broader isotopic niche and higher trophic position, which could be associated with greater trophic flexibility and consumption of demersal and mesopelagic prey. In contrast, <em>C. hippurus</em> displayed a narrower isotopic niche and a lower trophic level, suggesting a more restricted diet focused on small epipelagic prey. Trophic niche partitioning between these two species would be an ecological mechanism aimed at reducing competition and facilitating their coexistence in the region. Our findings highlight the importance of the GMR as a buffer area and feeding ground for large commercially pelagic species in the Eastern Tropical Pacific.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"288 ","pages":"Article 107442"},"PeriodicalIF":2.2,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291691","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":"Size matters for the efficiency of sorting grids in demersal trawls","authors":"Manu Sistiaga ,&nbsp;Bent Herrmann ,&nbsp;Jesse Brinkhof ,&nbsp;Hermann Pettersen ,&nbsp;Dagfinn Lilleng ,&nbsp;Liz Kvalvik ,&nbsp;Jostein Saltskår ,&nbsp;Kristian L. Skaar","doi":"10.1016/j.fishres.2025.107430","DOIUrl":"10.1016/j.fishres.2025.107430","url":null,"abstract":"<div><div>Size selectivity devices implemented in trawls are often strictly regulated and can remain unchanged over longer periods. This is the case for the Barents Sea gadoid trawl fishery, one of the most important and valuable demersal fisheries in the world, where since 1997 the compulsory gear has been composed of a sorting grid and a subsequent size selective codend. The upscaling and development of the trawl gear typically used in the area in the last three decades has contributed to capacity issues that can lead to inefficiencies in size selectivity and operational problems of grid sections. The present study investigates whether upscaling the mandatory grid by doubling its sorting area can improve the size selectivity in the fishery. A mandatory grid section and an upscaled grid section were directly compared in sea trials in a twin trawl configuration. The data were analyzed considering structural models, which resulted in a more logical representation of the relative performance of the two grid sections compared in the study than traditionally used empirical models. The upscaled grid significantly increased the sorting efficiency for undersized haddock (<em>Melanogrammus aeglefinus</em>), while the catch efficiency of commercial-sized cod (<em>Gadus morhua</em>) and haddock were equal. The additional sorting capacity exhibited by the upscaled grid is expected to play an important role in the future management of the fishery. Further, it demonstrates the importance of revising the efficiency of compulsory selectivity devices periodically and can point to the direction to adopt in other fisheries with similar issues. The upscaled grid did not imply any additional work or challenge for the crew during its operation.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"288 ","pages":"Article 107430"},"PeriodicalIF":2.2,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298101","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 Florida stone crab fishery: Trophic shifts, parasitic associations, and nutritional impacts","authors":"Elizabeth Duermit-Moreau ,&nbsp;Jamie Bojko ,&nbsp;Claire E. Crowley-McIntyre ,&nbsp;Ryan Gandy ,&nbsp;Donald C. Behringer","doi":"10.1016/j.fishres.2025.107431","DOIUrl":"10.1016/j.fishres.2025.107431","url":null,"abstract":"<div><div>This study investigates the impact of the stone crab (<em>Menippe</em> spp.) fishery practice of claw removal on parasitology, physiological condition, and trophic ecology, with the goal of understanding the long-term effects on crab fitness at two locations on Florida’s Gulf Coast. Despite the economic significance of <em>Menippe</em> spp., the potential ecological and biological consequences of claw removal have not been fully explored. Our findings reveal several potentially pathogenic symbiont associations, including two novel viral pathologies (<em>Nudiviridae</em> and <em>Reoviridae</em>), <em>Hematodinium perezi</em>, and bacterial hepatopancreatic necrosis, which are of concern due to their impact on other crustacean populations and fisheries. While crabs missing or regenerating claws showed reduced nutritional condition, there was no significant difference in symbiont prevalence or isotopic niche between declawed and intact crabs. However, clawless crabs were infested with 99 % more gill barnacles, <em>Octolasmis mülleri</em>, than intact crabs. Although gill barnacles are generally regarded as commensal or opportunistic, this finding may suggest subtle shifts in susceptibility or exposure associated with claw loss. These results provide a deeper understanding of the trade-offs associated with claw removal in stone crab fisheries and underscore the need for ongoing monitoring of symbionts and pathogens in fished populations. Ultimately, the study contributes to a broader understanding of the sustainability of the fishery and the ecological consequences of fishing practices on stone crab health.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"288 ","pages":"Article 107431"},"PeriodicalIF":2.2,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289205","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":"Trophic ecology of a highly abundant pelagic fish (Trachurus lathami) in a coastal marine ecosystem (39º - 42º S; Southwest Atlantic) related to environmental variability","authors":"Aylén M. Fernández Abud ,&nbsp;Daniela Alemany ,&nbsp;Claudio César Buratti ,&nbsp;Brenda Temperoni","doi":"10.1016/j.fishres.2025.107443","DOIUrl":"10.1016/j.fishres.2025.107443","url":null,"abstract":"<div><div>This study aimed to assess the feeding habits of rough scad <em>T. lathami</em>, an important pelagic fish in a Southwest Atlantic coastal marine ecosystem (El Rincón, 39º-42º S), during early (ES) and late (LS) spring of 2019. Trophic incidence (TI), relative importance (% RI) of prey items in stomach contents (n = 279), feeding strategy, ontogenetic shift in diet (multiple hypothesis modelling), and the relationship of diet with zooplankton abundance and with oceanographic conditions (multivariate analyses) were determined. Trophic incidence varied between ES (49 %) and LS (77 %), with a greater diversity of prey in the environment and the stomachs during the latter. Planktonic crustaceans prevailed, with copepods as the dominant prey in both spring periods (ES: RI 99 %; LS: RI 86 %). Large copepods (&gt; 1 mm) dominated in ES, whereas small copepods (&lt; 1 mm) dominated in LS. Amphipods, pteropods, bivalve larvae, decapod larvae, mysidaceans and bony fish remains were rare prey (% RI &lt; 10). Feeding strategy analysis suggested a specialization at a population level on copepods (filter-feeding) and the occasional ingestion of other prey (active predation). A moderate correlation was observed between the diet and bottom temperature, thus suggesting their potential influence on rough scad feeding habits. Results highlight the opportunistic behaviour of rough scad in matching its diet to the most abundant prey in the environment, reflecting its plasticity in adapting to their short-time variations.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"288 ","pages":"Article 107443"},"PeriodicalIF":2.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279696","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":"Otolith oxygen isotopes inform dispersal and movement patterns for eastern school (Sillago flindersi) and stout (Sillago robusta) whiting along the east coast of Australia","authors":"Melissa Tan ,&nbsp;Brendan P. Kelaher ,&nbsp;Lewis Adler ,&nbsp;Curtis Champion ,&nbsp;Karina C. Hall","doi":"10.1016/j.fishres.2025.107419","DOIUrl":"10.1016/j.fishres.2025.107419","url":null,"abstract":"<div><div>Understanding stock structure and connectivity of harvested marine fishes is crucial for informed management and conservation efforts. We analysed stable oxygen isotopes in fish otolith carbonate to infer dispersal and movement patterns of stout whiting (<em>Sillago robusta</em>) and eastern school whiting (<em>Sillago flindersi</em>) in southeastern Australia. Adult fish were collected from commercial catches across seven locations spanning 8° latitude for stout whiting and 16 locations distributed over 15° latitude for eastern school whiting. Sagittal otoliths were sectioned, polished and micromilled to produce a carbonate sample from the juvenile ‘core’ and adult ‘edge’ portion of each otolith. Samples were analysed for oxygen isotope ratios (δ¹⁸O_otolith) using isotope ratio mass spectrometry. Oxygen isotope ratios in stout whiting otoliths were significantly influenced by the interaction between capture location and life stage, with temperature preferences between life stages more pronounced with increasing latitude. Variation in δ¹⁸O_otolith values among adult eastern school whiting sampled from different locations indicated limited connectivity between northern and southern extremities of the species distribution, but considerable mixing across adjacent latitudes. Additionally, significant variation in δ¹⁸O_otolith values between male and female eastern school whiting suggested sex-biased dispersal may be occurring, with males dispersing further than females. For each species, low core δ¹⁸O_otolith values implied movement from warmer juvenile nursery habitats to cooler waters as adults, which may involve inshore-offshore ontogenetic migrations and/or southerly longshore migrations using prevailing currents. The intricate dynamics of connectivity and ontogenetic movements of stout and eastern school whiting across multiple jurisdictions highlight the importance for co-operative and collaborative management efforts.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"288 ","pages":"Article 107419"},"PeriodicalIF":2.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279595","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}