Fisheries Oceanography最新文献_第4页

Temporal and spatial variations in squid jigging catch efficiency in the Oyashio Extension region 大矢尾延伸区鱿鱼钓捕获效率的时空变化

IF 1.9 2区农林科学

Fisheries Oceanography Pub Date : 2024-07-17 DOI: 10.1111/fog.12692

Zixuan Niu, Zhaohui Chen, Wei Yu, Haihong Guo, Ruichen Zhu, Xiaoyi Zhang

{"title":"Temporal and spatial variations in squid jigging catch efficiency in the Oyashio Extension region","authors":"Zixuan Niu, Zhaohui Chen, Wei Yu, Haihong Guo, Ruichen Zhu, Xiaoyi Zhang","doi":"10.1111/fog.12692","DOIUrl":"10.1111/fog.12692","url":null,"abstract":"The abundance of fishery resources significantly impacts the ratio of fishing effort to harvest. However, traditional statistics of fishery catches or commonly used catch per unit effort (CPUE) metrics cannot accurately capture the complexity of resource abundance in the ocean. To address this issue, we propose here a novel approach that integrates the actual fishery catch from vessel logs with fishing duration obtained through automatic identification system (AIS) positioning. This combined analysis eliminates confounding factors and introduces a novel metric called “catch efficiency (CE)” to evaluate fishing operations more accurately, thereby reflecting resource abundance in a more reasonable way. In this study, we focus on the CE of squid in the Oyashio Extension region in the Northwestern Pacific. Our analysis reveals significant temporal and spatial variations of CE, manifesting in both intensity and distribution patterns. Moreover, our findings establish a close relationship between CE and background water mass distribution, chlorophyll-a concentration, and micronekton biomass. This implies that the resource abundance of squid can be inferred by considering the varying environmental factors within the fishing area.","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"33 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fog.12692","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141744829","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}

引用次数: 0

Influence of coastal oceanography on early life history traits of larval Patagonian sprat, Sprattus fuegensis along southeastern Pacific Ocean 沿岸海洋学对东南太平洋巴塔哥尼亚鲱幼鱼早期生活史特征的影响

IF 1.9 2区农林科学

Fisheries Oceanography Pub Date : 2024-07-17 DOI: 10.1111/fog.12690

Erika López-Soto, Gillian Ord, Manuel I. Castillo, Guido Plaza, Mario A. Cáceres, María Teresa González, Maritza Sepúlveda, Alicia I. Guerrero, Andrea Piñones, Mauricio F. Landaeta

{"title":"Influence of coastal oceanography on early life history traits of larval Patagonian sprat, Sprattus fuegensis along southeastern Pacific Ocean","authors":"Erika López-Soto, Gillian Ord, Manuel I. Castillo, Guido Plaza, Mario A. Cáceres, María Teresa González, Maritza Sepúlveda, Alicia I. Guerrero, Andrea Piñones, Mauricio F. Landaeta","doi":"10.1111/fog.12690","DOIUrl":"10.1111/fog.12690","url":null,"abstract":"Early life history traits of small pelagic fish are usually affected by environmental conditions. Patagonian sprat, Sprattus fuegensis, is a small pelagic fish that inhabits the continental shelf, fjords and channels of Patagonia. Their larvae are usually exposed to large variations in physical and biological conditions. We evaluated the effects of environmental conditions on early life history traits of this key species encompassing over 20 years of information. The characterization of oceanographic features, larval abundance and distribution was carried out in western Patagonia between 1996 and 2019, while the growth and mortality rates were estimated for the austral spring 2019 between 49°54′S and 53°55′S. Larval abundance decreased three to ten times from 1996 to 1997 to the rest of the study period (2008–2010 and 2014–2019), with larger abundances being found over the shelf. In spring 2019, the growth rate was 0.20 ± 0.05 mm d−1 for larvae between 9 and 19 days after hatching. The growth rate was similar in partially stratified (7–50 J m−3) and stratified waters (50–100 J m−3), but slower in mixed waters (< 7 J m−3). GAM modelling showed that the faster larval growth occurred in partially stratified waters with temperatures above 7.5°C. Natural mortality rates were higher in partially stratified waters (24% of daily loss), lower in stratified areas (14%) and the lowest in the mixed water column (12%). Accordingly, larvae living in channels had faster growth rates but higher daily mortality, while those that hatched or were advected to water parcels on the continental shelf had slower growth but lower daily mortality. Finally, these latter traits may be an example of an inverse growth-selective survival strategy.","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"33 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141744690","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}

引用次数: 0

Deepening our understanding of the environmental influences on the reproductive dynamics of the main fishery stock of Argentine hake, Merluccius hubbsi, in the southwestern Atlantic Ocean 加深理解环境对大西洋西南部阿根廷无须鳕（Merluccius hubbsi）主要渔业种群繁殖动态的影响

IF 1.9 2区农林科学

Fisheries Oceanography Pub Date : 2024-06-30 DOI: 10.1111/fog.12687

Mariano Elisio, Marina V. Diaz, Ezequiel Leonarduzzi, Karina A. Rodrigues, Juan M. Burla, Gustavo J. Macchi

{"title":"Deepening our understanding of the environmental influences on the reproductive dynamics of the main fishery stock of Argentine hake, Merluccius hubbsi, in the southwestern Atlantic Ocean","authors":"Mariano Elisio, Marina V. Diaz, Ezequiel Leonarduzzi, Karina A. Rodrigues, Juan M. Burla, Gustavo J. Macchi","doi":"10.1111/fog.12687","DOIUrl":"10.1111/fog.12687","url":null,"abstract":"This study analyzed the inter-annual variability in the reproductive dynamics of the Argentine hake from Patagonian waters during the last 20 years concerning the environmental conditions and the nutritional status of females. Macroscopic and histological information on gonadal maturity, female condition factor (K), and oceanographic data at different sampling sites throughout the studied region were obtained from research surveys carried out during the main spawning season of this species. Four stages, according to the maturity ovarian phases composition, were assigned annually at each sampling site to assess reproductive dynamics: vitellogenesis, ovulation, regression, and resting. The spatial pattern of inter-annual variability in reproductive dynamics was described, and the influence of temperature and female condition on the probability of ovulation and regression was assessed using generalized linear models. The area with the lowest inter-annual variability in the hake reproductive dynamics was observed between 43 and 45°S (50 to 80 m depth) in relation to ovulation events. The vitellogenesis stage was more frequently found adjacent to the reproductive area, whereas the regression was mainly observed in deeper waters. Both bottom and surface temperatures explained the ovulation and regression stages, showing a positive and negative relationship, respectively. Lower values of the K factor, associated with low food availability, were further linked to the occurrence of regression. Finally, it is worth noting that the relationship observed between the ovulation/spawning dynamics of Argentine hake and water temperature suggests that the reproductive success of this species could be affected in the future scenario of climate change.","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"33 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502608","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}

引用次数: 0

Environmental effects on growth performance of Pacific oyster Crassostrea gigas cultured in the Seto Inland Sea, Japan, from 1990 to 2021 环境对 1990 年至 2021 年在日本濑户内海养殖的太平洋牡蛎生长性能的影响

IF 1.9 2区农林科学

Fisheries Oceanography Pub Date : 2024-06-29 DOI: 10.1111/fog.12686

Yumeng Pang, Tsuneo Ono, Takehiro Tanaka

{"title":"Environmental effects on growth performance of Pacific oyster Crassostrea gigas cultured in the Seto Inland Sea, Japan, from 1990 to 2021","authors":"Yumeng Pang, Tsuneo Ono, Takehiro Tanaka","doi":"10.1111/fog.12686","DOIUrl":"10.1111/fog.12686","url":null,"abstract":"The Pacific oyster (Crassostrea gigas) has been cultured for its flesh in the Seto Inland Sea, western Japan, over the last half-century. Its production has been reported as ‘fluctuating’, yet little is known about changes in oyster growth performance throughout long-term culturing in this locality. To effectively manage oyster production under future environmental challenges, this study investigated the long-term environmental influences on oyster growth performance. Environmental data and oyster biological data were obtained from observations in Hinase waters, Seto Inland Sea, and compared for the two periods 1990 and 2015–2021. Water temperature has not significantly changed in this locality during the oyster culturing period. Lower salinity was found in July of 2015–2021 due to heavy seasonal rainfall, which had a negative impact on oysters, specifically on survival rate and total weight. A high growth rate and high meat weight at harvest were found in the individuals cultured during the period 2015–2021, yet oyster total weight showed no significant difference. Further research on shell characteristics is required to have a better understanding of oyster growth characteristics.","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"33 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502610","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}

引用次数: 0

Predator biomass affects west–east shifts in Barents Sea capelin (Mallotus villosus) spawning ground use 捕食者生物量影响巴伦支海毛鳞鱼（Mallotus villosus）产卵场的西-东转移

IF 1.9 2区农林科学

Fisheries Oceanography Pub Date : 2024-06-18 DOI: 10.1111/fog.12685

Tora Olsen, Håvard G. Frøysa, Natalia A. Yaragina, Josefin Titelman, Joel M. Durant, Øystein Langangen

{"title":"Predator biomass affects west–east shifts in Barents Sea capelin (Mallotus villosus) spawning ground use","authors":"Tora Olsen, Håvard G. Frøysa, Natalia A. Yaragina, Josefin Titelman, Joel M. Durant, Øystein Langangen","doi":"10.1111/fog.12685","DOIUrl":"https://doi.org/10.1111/fog.12685","url":null,"abstract":"Spawning locations of migratory fish influence the environmental and oceanographic fate of eggs and larvae. However, we have an incomplete understanding of how and why realized spawning locations vary. We quantified the yearly variation in spawning location for Barents Sea capelin (Mallotus villosus) within the recognized spawning areas along the coast of northern Norway and Murman. Furthermore, we tested whether water temperature, sea ice cover, predation and capelin fisheries are associated with spawning locations. Estimated spatial variation in spawning longitude used data from Soviet-Russian ichthyoplankton surveys from 1959 to 1993 and a bootstrap procedure. The mean spawning area along the coast was then calculated by combining larvae observations with backtracking a larvae drift model from potential spawning areas. We fitted a generalized additive model (GAM) to assess the effects of environmental conditions on these drift-corrected spawning longitudes. Capelin's mean yearly spawning location varied substantially across the study period. An increase in immature cod biomass, a major predator of capelin, during the spawning migration period in winter and early spring corresponds to more eastward capelin spawning. The eastward shift in mean spawning longitude seems to reach an eastern limit at high immature cod biomass. Sea temperature, sea ice cover and capelin fisheries were not associated with mean capelin spawning longitude. We show that the realized spawning areas for capelin are related to cod biomass, potentially through cod predation depleting and/or acting as a migration barrier for mature capelin.","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"33 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fog.12685","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438903","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}

引用次数: 0

Growth–feeding linkage in small pelagic fish larvae in the Kii Channel, Japan 日本纪伊海峡小型中上层鱼类幼体的生长-摄食联系

IF 1.9 2区农林科学

Fisheries Oceanography Pub Date : 2024-05-28 DOI: 10.1111/fog.12678

Shizuna Togoshi, Shota Tanaka, Naotaka Yasue, Masahiro Nakamura, Dominique Robert, Akinori Takasuka

{"title":"Growth–feeding linkage in small pelagic fish larvae in the Kii Channel, Japan","authors":"Shizuna Togoshi, Shota Tanaka, Naotaka Yasue, Masahiro Nakamura, Dominique Robert, Akinori Takasuka","doi":"10.1111/fog.12678","DOIUrl":"10.1111/fog.12678","url":null,"abstract":"The linkage between growth rate and feeding success has been shown to strengthen the effects of early growth rate on later growth rate in the early life history of fish. However, the growth–feeding linkage largely remains to be tested at the individual level within the same populations/cohorts. We examined the growth–feeding linkage for multiple populations/cohorts in Japanese anchovy Engraulis japonicus larvae and Pacific round herring Etrumeus micropus larvae, through otolith microstructure analysis, based on samples collected from the commercial fishery for larval fish in the Kii Channel, Japan. The three growth–feeding mechanisms, which are based on the respective potential advantages of larger somatic size, higher growth rate, and earlier morphological development for achieving feeding success, were tested to understand how growth rate relates to feeding success. The “somatic size” mechanism was supported for all of six samples for anchovy larvae and three of four samples for round herring larvae. The “growth rate” mechanism was supported for two of six samples for anchovy larvae and three of four samples for round herring larvae. The “morphological development” mechanism was supported for three of four samples for anchovy larvae and all of three samples for round herring larvae. Overall, the present analysis supported the growth–feeding linkage but revealed the dynamics of the growth–feeding mechanisms. All the mechanisms were shown to operate at least for certain populations/cohorts, but none of them were universally effective over all populations/cohorts across the two species. Understanding the dynamics of the growth–feeding mechanisms would provide precious hints for considering strategies of predicting recruitment dynamics.","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"33 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fog.12678","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141196166","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}

引用次数: 0

Effect of wind variability on the recruitment of anchovy Engraulis ringens in the southern Humboldt upwelling ecosystem 风力变化对洪堡特南部上升流生态系统中 Engraulis ringens 鳀鱼繁殖的影响

IF 1.9 2区农林科学

Fisheries Oceanography Pub Date : 2024-05-20 DOI: 10.1111/fog.12677

Marcos Arteaga, Sebastián I. Vásquez, Sergio Neira, Luis Cubillos

{"title":"Effect of wind variability on the recruitment of anchovy Engraulis ringens in the southern Humboldt upwelling ecosystem","authors":"Marcos Arteaga, Sebastián I. Vásquez, Sergio Neira, Luis Cubillos","doi":"10.1111/fog.12677","DOIUrl":"10.1111/fog.12677","url":null,"abstract":"Recruitment is a critical process in the dynamics of fish populations since it represents the abundance of new fish that enter a population each year. In Ekman-type upwelling ecosystems, wind is a critical factor for small pelagic fish recruitment, as it controls food availability and physical constraints such as turbulence and offshore advection. In this study, we evaluate the effect of wind, chlorophyll-a, and spawning biomass as independent variables on anchovy recruitment. Using generalized additive models (GAMs), we tested (i) the significance of each factor, (ii) the shape of the relationship between recruitment and predictors variables, (iii) recruitment regimes in the series, and (iv) whether extended windy events are associated with low recruitment levels potentially related to offshore transport of early life stages. The study period spanned from 1990 to 2021, focusing on the austral spring in south-central Chile (35–40°S) when both upwelling and anchovy spawning are maximized. GAMs revealed a parabolic relationship between the velocity of upwelling-favorable winds and anchovy recruitment. Maximized recruitment occurred at wind speeds around 6 m s−1 but decreased with winds above 7 m s−1 and below 5 m s−1, and during periods of extended windy events (i.e., those lasting more than 15 days). Chlorophyll-a showed no significance on anchovy recruitment, suggesting that phytoplankton were not a limiting factor for anchovy early survival. We also found that anchovy recruitment regimes were associated with specific wind intensities. We discussed the pertinence of incorporating a recruitment index based on wind in the fishery management of the anchovy in south-central Chile.","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"33 5","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141121585","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}

引用次数: 0

Niche structure and habitat shifts for coastal sharks of the US Southeast Atlantic and Gulf of Mexico 美国东南大西洋和墨西哥湾沿海鲨鱼的生态位结构和生境变化

IF 1.9 2区农林科学

Fisheries Oceanography Pub Date : 2024-05-18 DOI: 10.1111/fog.12676

Kaitlyn A. O'Brien, Enric Cortés, William B. Driggers III, Bryan S. Frazier, Robert J. Latour

{"title":"Niche structure and habitat shifts for coastal sharks of the US Southeast Atlantic and Gulf of Mexico","authors":"Kaitlyn A. O'Brien, Enric Cortés, William B. Driggers III, Bryan S. Frazier, Robert J. Latour","doi":"10.1111/fog.12676","DOIUrl":"10.1111/fog.12676","url":null,"abstract":"Understanding spatial ecology and predicting animal movements in response to environmental changes, such as anthropogenic climate change and multidecadal variability, is critical for effective conservation strategies. Niche structuring is key to some coastal shark species and size classes coexisting in the US Atlantic and Gulf of Mexico to limit interspecific and intraspecific interaction. Data from four fishery-independent bottom longline surveys were used to evaluate the abiotic ecological niches of eight species of small and large coastal sharks. Gaussian mixture models separated length composition data into 14 size categories for ecological niche analysis. Generalized additive mixed effect models were fit and coupled with output from dynamic high-resolution ocean models to predict suitable abiotic habitats, evaluate potential shifts in distribution, and explore the impacts of large-scale climatological trends on abiotic habitats from 1994 to 2019. The abiotic niche for small coastal sharks generally tended toward warmer, high salinity, shallow bottom waters close to shore. No overarching niche was found for large coastal sharks, but appreciable ontogenetic differences were seen. Most taxa analyzed exhibited declining annual trends in higher quality habitats, particularly during fall months. The analysis provided evidence of shifts north along the Atlantic, to deeper offshore waters in the Atlantic and Gulf of Mexico, and the potential to redistribute in response to multidecadal climate variability for multiple species. The analytical framework described could aid in developing various spatiotemporal management measures, and results provide insight into the habitat characteristics of several species over broad spatiotemporal ranges and through ontogeny.","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"33 5","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fog.12676","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141125729","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}

引用次数: 0

Interspecific and intraspecific difference in egg size of two mackerel (Scomber spp.) species in relation to sea surface temperature in the western North Pacific: A new approach to species identification 北太平洋西部两种鲭鱼卵大小的种间和种内差异与海面温度的关系：物种鉴定的新方法

IF 1.9 2区农林科学

Fisheries Oceanography Pub Date : 2024-05-09 DOI: 10.1111/fog.12675

Mikio Watai, Tohya Yasuda, Junji Kinoshita, Mitsuo Nyuji, Satoshi Nagai, Akinori Takasuka, Michio Yoneda

{"title":"Interspecific and intraspecific difference in egg size of two mackerel (Scomber spp.) species in relation to sea surface temperature in the western North Pacific: A new approach to species identification","authors":"Mikio Watai, Tohya Yasuda, Junji Kinoshita, Mitsuo Nyuji, Satoshi Nagai, Akinori Takasuka, Michio Yoneda","doi":"10.1111/fog.12675","DOIUrl":"10.1111/fog.12675","url":null,"abstract":"Chub mackerel (Scomber japonicus, Scombridae) and blue mackerel (Scomber australasicus) are two important fishery resources in the western North Pacific that spawn eggs during the same season. Although estimating the total egg production (TEP) is important for evaluating the spawning stock biomass of mackerel species, it is difficult to accurately identify formalin-preserved eggs collected during ichthyoplankton surveys. Hence, a new identification criterion that incorporates the effects of water temperature on egg size was developed in this study. The diameter of 37,304 mackerel eggs collected over 16 years (2006–2021) was measured, and frequency distributions of egg size across sea surface temperature (SST) ranges at 1°C interval were constructed. The frequency distributions were classified into two groups using a Gaussian mixture model; based on the results of DNA analysis, the small group was chub mackerel, while the large group was blue mackerel. The SST at the sampling stations and the mean egg size of both groups were negatively correlated. The new identification criterion, incorporating the relationship between SST and egg size, provided reasonable estimates of the TEP of the two mackerel species compared with the conventional criterion. The new species identification approach is applicable to other fish taxa in the western North Pacific.","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"33 5","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140934838","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}

引用次数: 0

Analyzing fishery data and exploring the resource status of Antarctic krill based on its environmental dependence 根据南极磷虾的环境依赖性分析渔业数据并探索其资源状况

IF 1.9 2区农林科学

Fisheries Oceanography Pub Date : 2024-03-29 DOI: 10.1111/fog.12674

Rui Wang, Shigang Liu, Ran Zhang, Hai Li, Puqing Song, Yuan Li, Longshan Lin

{"title":"Analyzing fishery data and exploring the resource status of Antarctic krill based on its environmental dependence","authors":"Rui Wang, Shigang Liu, Ran Zhang, Hai Li, Puqing Song, Yuan Li, Longshan Lin","doi":"10.1111/fog.12674","DOIUrl":"10.1111/fog.12674","url":null,"abstract":"Antarctic krill Euphausia superba is a key species in the Southern Ocean ecosystem and has important ecological value. It is also one of the main fishery resources in the Southern Ocean with high economic value. In recent years, with the development of krill fishery and rapid climate change, the conservation and management of krill resources have faced unprecedented challenges. The krill resource is different from the general fishery resources. Due to the krill schooling characteristics, fishery data has some advantages over scientific survey data. Reviewing and analyzing the krill fishery data is necessary. Therefore, in this study, four fishery resource indices (FRIs) were calculated based on Antarctic krill fishery data, and based on the environmental dependence of Antarctic krill, the FRI with the strongest environmental dependence was screened by using the Gradient Forest Model, and the step changes of the FRI with strongest environmental dependence was examined by using the sequential t-test analyses of regime shifts (STARS). The generalized additive model (GAM) to analyze the correlation between the FRI with the strongest environmental dependence and the main environmental factors, and then explore the resource status of Antarctic krill in the study area. The model results showed that the “FRI_hual” had the strongest environmental dependence and was a better indicator of the status of the Antarctic krill in the study area than the others. In the 2009–2010 year, “FRI_hual” had an obvious regime shift. The interaction of environmental factors “ice_area_2” and “SSH_1” has a great impact on “FRI_hual”. Methods used and results obtained in the study can provide new ideas and a scientific reference for future work, including integrated stock assessment of krill and krill resource monitoring, conservation, and management based on the ecosystem.","PeriodicalId":51054,"journal":{"name":"Fisheries Oceanography","volume":"33 5","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367992","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}

引用次数: 0