Fisheries Oceanography最新文献

{"title":"Stage-specific drivers of Pacific hake (Merluccius productus) recruitment in the California Current Ecosystem","authors":"Cathleen D. Vestfals,&nbsp;Kristin N. Marshall,&nbsp;Nick Tolimieri,&nbsp;Mary E. Hunsicker,&nbsp;Aaron M. Berger,&nbsp;Ian G. Taylor,&nbsp;Michael G. Jacox,&nbsp;Brendan D. Turley","doi":"10.1111/fog.12634","DOIUrl":"10.1111/fog.12634","url":null,"abstract":"<p>Understanding environmental drivers of recruitment variability in marine fishes remains an important challenge in fish ecology and fisheries management. We developed a conceptual life-history model for Pacific hake (<i>Merluccius productus</i>) along the west coast of the United States and Canada to generate stage-specific and spatiotemporally-specific hypotheses regarding the oceanographic and biological variables that likely influence their recruitment. Our model included seven life stages from pre-spawning female conditioning through pelagic juvenile recruitment (age-0 fish) for the coastal Pacific hake stock. Model-estimated log recruitment deviations from the 2020 hake assessment were used as the dependent variable, with predictor variables drawn primarily from a regional ocean reanalysis for the California Current Ecosystem. Indices of prey and predator abundance were also included in our analysis, as were predictors of local- and basin-scale climate. Five variables explained 59% of the recruitment variability not accounted for by the stock–recruitment relationship in the hake assessment. Recruitment deviations were negatively correlated with May–September eddy kinetic energy between 34.5° and 42.5°N, the North Pacific Current Bifurcation Index, and Pacific herring (<i>Clupea pallasii</i>) biomass during the spawner preconditioning stage, alongshore transport during the yolk-sac larval stage, and the number of days between storm events during the first-feeding larval stage. Other important predictors included upwelling strength during the preconditioning stage, the number of calm periods during the first-feeding larval stage, and age-1 hake predation on age-0 pelagic juveniles. These findings suggest that multiple mechanisms affect Pacific hake survival across different life stages, leading to variability in population-level recruitment.</p>","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"32 4","pages":"352-389"},"PeriodicalIF":2.6,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48022936","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 El Niño-Southern Oscillation on bigeye and yellowfin tuna longline catch per unit effort in the equatorial Pacific","authors":"Réka Domokos","doi":"10.1111/fog.12644","DOIUrl":"10.1111/fog.12644","url":null,"abstract":"<p>Bigeye tuna (BET) and yellowfin tuna (YFT) are economically important target species of pelagic fisheries worldwide, especially for tropical Pacific nations whose economies and food sources are heavily affected by commercial and sustenance tuna fishing. The El Niño-Southern Oscillation (ENSO) has a strong effect on the oceanographic conditions in the equatorial Pacific, including BET and YFT equatorial habitat and fishing grounds. For optimal fisheries management, the effects of environmental variability such as ENSO on the stocks and on the performance of fisheries must be known and predictable. However, besides some model predictions, the effects of ENSO on these two tuna species are not well understood. In this study, I investigate the statistical relationships between past ENSO conditions and equatorial fisheries using the Multivariate ENSO Index, sea surface temperature (SST), and catch and effort records from the longline fisheries in the region. Results of this study indicate that El Niño events have both delayed and concurrent positive effects on BET and YFT catch per unit effort (CPUE). The delayed positive ENSO effect on CPUE is hypothesized to be the result of enhanced recruitment acting via different mechanisms in the west than in the east. The concurrent positive effects on CPUE could be due to catchability, abundance, and/or vertical distribution of BET and YFT relative to fishing gear and require further investigation. Further exploration of the mechanisms that may underlie the results presented here could lead to predictability of CPUE of these two tuna species.</p>","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"32 6","pages":"527-540"},"PeriodicalIF":2.6,"publicationDate":"2023-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fog.12644","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47062559","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":"Trivial gain of downscaling in future projections of higher trophic levels in the Nordic and Barents Seas","authors":"I. Nilsen, F. Fransner, A. Olsen, J. Tjiputra, R. Hordoir, C. Hansen","doi":"10.1111/fog.12641","DOIUrl":"https://doi.org/10.1111/fog.12641","url":null,"abstract":"","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"1 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63459409","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":"Trivial gain of downscaling in future projections of higher trophic levels in the Nordic and Barents Seas","authors":"Ina Nilsen,&nbsp;Filippa Fransner,&nbsp;Are Olsen,&nbsp;Jerry Tjiputra,&nbsp;Robinson Hordoir,&nbsp;Cecilie Hansen","doi":"10.1111/fog.12641","DOIUrl":"https://doi.org/10.1111/fog.12641","url":null,"abstract":"<p>Downscaling physical forcing from global climate models is both time consuming and labor demanding and can delay or limit the physical forcing available for regional marine ecosystem modelers. Earlier studies have shown that downscaled physics is necessary for capturing the dynamics of primary production and lower trophic levels; however, it is not clear how higher trophic levels respond to the coarse resolution physics of global models. Here, we apply the Nordic and Barents Seas Atlantis ecosystem model (NoBa) to study the consequences of using physical forcing from global climate models versus using that from regional models. The study is therefore (i) a comparison between a regional model and its driving global model to investigate the extent to which a global climate model can be used for regional ecosystem predictions and (ii) a study of the impact of future climate change in the Nordic and Barents Seas. We found that few higher trophic level species were affected by using forcing from a global versus a regional model, and there was a general agreement in future biomass trends and distribution patterns. However, the slight difference in temperature between the models dramatically impacted Northeast Arctic cod (<i>Gadus morhua</i>), which highlights how species projection uncertainty could arise from poor physical representation of the physical forcing, in addition to uncertainty in the ecosystem model parameterization.</p>","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"32 5","pages":"479-493"},"PeriodicalIF":2.6,"publicationDate":"2023-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fog.12641","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50150929","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":"Shelf break exchange processes influence the availability of the northern shortfin squid, Illex illecebrosus, in the Northwest Atlantic","authors":"Sarah L. Salois,&nbsp;Kimberly J. W. Hyde,&nbsp;Adrienne Silver,&nbsp;Brooke A. Lowman,&nbsp;Avijit Gangopadhyay,&nbsp;Glen Gawarkiewicz,&nbsp;Anna J. M. Mercer,&nbsp;John P. Manderson,&nbsp;Sarah K. Gaichas,&nbsp;Daniel J. Hocking,&nbsp;Benjamin Galuardi,&nbsp;Andrew W. Jones,&nbsp;Jeff Kaelin,&nbsp;Greg DiDomenico,&nbsp;Katie Almeida,&nbsp;Bill Bright,&nbsp;Meghan Lapp","doi":"10.1111/fog.12640","DOIUrl":"10.1111/fog.12640","url":null,"abstract":"<p>The United States Northern Shortfin squid fishery is known for its large fluctuations in catch at annual scales. In the last 5 years, this fishery has experienced increased availability of <i>Illex illecebrosus</i> along the Northeast US continental shelf (NES), resulting in high catch per unit effort (CPUE) and early fishery closures due to quota exceedance. The fishery occurs within the Northwest Atlantic, whose complex dynamics are set up by the interplay between the large-scale Gulf Stream, mesoscale eddies, Shelfbreak Jet, and shelf-slope exchange processes. Our ability to understand and quantify this regional variability is requisite for understanding the availability patterns of <i>Illex</i>, which are largely influenced by oceanographic conditions. In an effort to advance our current understanding of the seasonal and interannual variability in this species' relative abundance on the NES, we used generalized additive models to examine the relationships between the physical environment and hotspots of productivity to changes in CPUE of <i>I. illecebrosus</i> in the Southern stock component, which comprises the US fishery. Specifically, we derived oceanographic indicators by pairing high-resolution remote sensing data and global ocean reanalysis physical data to high-resolution fishery catch data. We identified a suite of environmental covariates that were strongly related to instances of higher catch rates. In particular, bottom temperature, warm core rings, subsurface features, and frontal dynamics together serve as indicators of habitat condition and primary productivity hotspots, providing great utility for understanding the distribution of <i>Illex</i> with the potential for forecasting seasonal and interannual availability.</p>","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"32 5","pages":"461-478"},"PeriodicalIF":2.6,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fog.12640","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47290507","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":"Restricted connectivity for cobia Rachycentron canadum (Perciformes: Rachycentridae) in the Western Atlantic Ocean","authors":"Maria Raquel M. Coimbra,&nbsp;Emilly Benevides,&nbsp;Renata da Silva Farias,&nbsp;Bruno C. N. R. da Silva,&nbsp;Sara Cloux,&nbsp;Vicente Pérez-Muñuzuri,&nbsp;Manuel Vera,&nbsp;Rodrigo Torres","doi":"10.1111/fog.12642","DOIUrl":"10.1111/fog.12642","url":null,"abstract":"<p>Cobia (<i>Rachycentron canadum</i>) is a coastal pelagic migratory fish species of tropical and subtropical waters, where it is an important game fish and it has been commercially expanded in offshore aquaculture systems. Understanding population connectivity is of utmost importance to the sustainable use and conservation of aquatic resources, and information on genetic diversity and structure is key element in unraveling differentiation when no clear physical barriers exist. In the present study, cobia genetic diversity and structure were depicted using mitochondrial DNA cytochrome b sequencing and microsatellite genotyping in samples from the Southwestern Atlantic and showed that a major single population inhabits the southern hemisphere. Cytochrome b sequencing also suggested that the Indian Ocean is the center of origin for this species' diversification. A hierarchical analysis of AMOVA compared sampling locations from the Northwestern Atlantic (from a previous study) with the Southwestern ones using nine shared microsatellite markers. Differentiation among groups (F_<i>CT</i> <i>=</i> 0.41), Bayesian clustering analysis, and complementary ordination analyses (by discriminant analysis of principal components [DAPC] and factorial correspondence analysis [3D-FCA]) presented a clear separation between the two hemispheres, supported by a Lagrangian model that explained the ocean dynamics over larval retention on the Western Atlantic. Another genetic subgroup intermingled with the main Southwestern group may also exist further south, probably associated with the Vitória-Trindade Ridge and the local current systems. The distribution of this species in metapopulations is of extreme relevance for fisheries and fish hatcheries management in the Atlantic Ocean.</p>","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"32 6","pages":"495-508"},"PeriodicalIF":2.6,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45969298","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":"Comparison of machine learning models within different spatial resolutions for predicting the bigeye tuna fishing grounds in tropical waters of the Atlantic Ocean","authors":"Liming Song,&nbsp;Tianlai Li,&nbsp;Tianjiao Zhang,&nbsp;Hengshou Sui,&nbsp;Bin Li,&nbsp;Min Zhang","doi":"10.1111/fog.12643","DOIUrl":"10.1111/fog.12643","url":null,"abstract":"<p>To understand the effects of the machine learning models and the spatial resolutions on the prediction accuracy of bigeye tuna (<i>Thunnus obesus</i>) fishing grounds, logbook data of 13 Chinese longliners operating in the high seas of the Atlantic Ocean from 2016 to 2019 were collected. The environmental factors were selected based on the correlation analysis of calculation of catch per unit effort (CPUE) and the marine vertical environmental factors. Five machine learning models: random forest, gradient-boosting decision tree, <i>K</i>-nearest neighbor, logistic regression and stacking ensemble learning (STK) within four spatial resolutions of .5° × .5°, 1° × 1°, 2° × 2° and 5° × 5° grids were constructed and compared. Results showed that (1) the prediction performance of STK model was the best, with the highest scores of the four evaluation indexes, accuracy (Acc), precision (P), recall (R), and F1-score (F1), and the highest correct prediction rate for predicting “high CPUE fishing ground”; (2) models within the spatial resolution of 1° × 1° grids predicted the better results compared with .5° × .5°, 2° × 2° and 5° × 5° grids; (3) the vertical environmental factors selected based on the correlation analysis could be used as reliable predictors in the models. Results suggested that using STK within 1° × 1° grids could improve the generalization performance and prediction accuracy for predicting the bigeye tuna fishing grounds in the Atlantic Ocean.</p>","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"32 6","pages":"509-526"},"PeriodicalIF":2.6,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43887142","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":"Forecast-ready models to support fisheries' adaptation to global variability and change","authors":"Kylie L. Scales,&nbsp;Thomas S. Moore II,&nbsp;Bernadette Sloyan,&nbsp;Claire M. Spillman,&nbsp;J. Paige Eveson,&nbsp;Toby A. Patterson,&nbsp;Ashley J. Williams,&nbsp;Alistair J. Hobday,&nbsp;Jason R. Hartog","doi":"10.1111/fog.12636","DOIUrl":"10.1111/fog.12636","url":null,"abstract":"<p>Ocean and climate drivers affect the distribution and abundance of marine life on a global scale. Marine ecological forecasting seeks to predict how living marine resources respond to physical variability and change, enabling proactive decision-making to support climate adaptation. However, the skill of ecological forecasts is constrained by the skill of underlying models of both ocean state and species-environment relationships. As a test of the skill of data-driven forecasts for fisheries, we developed predictive models of catch-per-unit-effort (CPUE) of tuna and billfish across the south-west Pacific Ocean, using a 12-year time series of catch data and a large ensemble climate reanalysis. Descriptors of water column structure, particularly temperature at depth and upper ocean heat content, emerged as useful predictors of CPUE across species. Enhancing forecast skill over sub-seasonal to multi-year timescales in any system is likely to require the inclusion of sub-surface ocean data and explicit consideration of regional physical dynamics.</p>","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"32 4","pages":"405-417"},"PeriodicalIF":2.6,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fog.12636","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43932700","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":"Juvenile Albacore tuna (Thunnus alalunga) foraging ecology varies with environmental conditions in the California Current Large Marine Ecosystem","authors":"Catherine F. Nickels,&nbsp;Elan J. Portner,&nbsp;Owyn Snodgrass,&nbsp;Barbara Muhling,&nbsp;Heidi Dewar","doi":"10.1111/fog.12638","DOIUrl":"10.1111/fog.12638","url":null,"abstract":"<p>Juvenile North Pacific Albacore tuna (<i>Thunnus alalunga</i>) support commercial and recreational fisheries in the California Current Large Marine Ecosystem (CCLME), where they forage during summer and fall. The distributions of the commercial and recreational fisheries and estimates of forage availability have varied substantially over the past century. Time-series quantifying Albacore diet can help link forage composition to variability in Albacore abundance and distribution and, consequently, their availability to fishers. Previous diet studies in the CCLME are of relatively short duration, and long-term variability in Albacore diet remains poorly understood. We describe the diets of juvenile Albacore from three regions in the CCLME from 2007 to 2019 and use classification and regression tree analysis to explore environmental drivers of variability. Important prey include Northern Anchovy (<i>Engraulis mordax</i>), rockfishes (<i>Sebastes</i> spp.), Boreal Clubhook Squid (<i>Onychoteuthis borealijaponica</i>), euphausiids (Order: Euphausiidae), and amphipods (Order: Amphipoda), each contributing &gt;5% mean proportional abundance. Most prey items were short lived species or young-of-the-year smaller than 10 cm. Diet variability was related to environmental conditions over the first 6 months of the year (PDO, sea surface temperature, and NPGO) and conditions concurrent with Albacore capture (region and surface nitrate flux). We describe foraging flexibility over regional and annual scales associated with these environmental influences. Continuous, long-term studies offer the opportunity to identify flexibility in Albacore foraging behavior and begin to make a predictive link between environmental conditions early in the year and Albacore foraging during summer and fall.</p>","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"32 5","pages":"431-447"},"PeriodicalIF":2.6,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49450367","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 tidal and diurnal rhythms on fish assemblages in the surf zone of sandy beaches","authors":"Wentong Xia,&nbsp;Zhongbo Miao,&nbsp;Sai Wang,&nbsp;Kai Chen,&nbsp;Yinglong Liu,&nbsp;Songguang Xie","doi":"10.1111/fog.12639","DOIUrl":"10.1111/fog.12639","url":null,"abstract":"<p>The surf zones are significantly affected by tides, however, several gaps still in knowledge of fish assemblages in surf zones response to spring-neap and daily tidal cycles. We investigated fish assemblages in a surf zone of Gaolong Bay in China. The dynamics of fish assemblages were examined during the neap tide and the spring tide to test the hypotheses that (1) fish assemblages reflect a combination of species from around coastal habitats, and (2) dynamics of the fish assemblages were determined by both the spring-neap cycles and diel rhythms of fish species. We collected 46 fish species comprising 16 coral reef-seagrass species, 24 mangrove-estuarine species, and 6 common coastal species. Fish abundance and richness were significantly higher during the neap tide than during the spring tide. Furthermore, during the neap tide, fish assemblages were mostly carnivorous coral reef-seagrass species at night and were mostly omnivorous and planktivorous species during the daytime. However, no clear diel patterns were observed during the spring tide. We suggested that dynamics of the fish assemblages were mainly shaped by the diurnal rhythms of fish during the neap tide and by the tidal cycle during the spring tide. Our results support the notion that surveys of fish assemblages during the neap tide could collect more abundance and rich species of multiple ecotypes of fish to evaluate fish resource status in the around coastal habitats. Consequently, management approaches around surf zones with heterogeneous seascapes can lead to positive outcomes for inshore fish resources and ecosystem conservation.</p>","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"32 5","pages":"448-460"},"PeriodicalIF":2.6,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44967100","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}