{"title":"Dietary niche overlap and prey consumption for the Steller sea lion (Eumetopias jubatus) and California sea lion (Zalophus californianus) in northwest Washington during 2010-2013","authors":"J. Scordino, A. Akmajian, S. Edmondson","doi":"10.7755/fb.120.1.4","DOIUrl":"https://doi.org/10.7755/fb.120.1.4","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71238421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dietary niche overlap and prey consumption for the Steller sea lion (Eumetopias jubatus) and California sea lion (Zalophus californianus) in northwest Washington during 2010-2013: suppl. figs. 8-14","authors":"J. Scordino","doi":"10.7755/fb.120.1.4s6","DOIUrl":"https://doi.org/10.7755/fb.120.1.4s6","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47287745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dietary niche overlap and prey consumption for the Steller sea lion (Eumetopias jubatus) and California sea lion (Zalophus californianus) in northwest Washington during 2010-2013: suppl. table 1","authors":"J. Scordino","doi":"10.7755/fb.120.1.4s1","DOIUrl":"https://doi.org/10.7755/fb.120.1.4s1","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45553493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reproductive characteristics for the blue shark (Prionace glauca) in the North Atlantic Ocean: supplementary table 2","authors":"Katherine Viducic","doi":"10.7755/fb.120.1.3s4","DOIUrl":"https://doi.org/10.7755/fb.120.1.3s4","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42860219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reproductive characteristics for the blue shark (Prionace glauca) in the North Atlantic Ocean: supplementary table 1","authors":"Katherine Viducic","doi":"10.7755/fb.120.1.3s1","DOIUrl":"https://doi.org/10.7755/fb.120.1.3s1","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43343984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Katherine Viducic, L. Natanson, M. Winton, A. Humphries
4 University of Rhode Island 120 Flagg Road Kingston, Rhode Island 02881 Abstract—The blue shark (Prionace glauca) in the North Atlantic Ocean is caught in large numbers in commercial fisheries and faces the possibility of overfishing. Reproductive parameters, such as size and age at maturity, are important descriptors of life history characteristics used for understanding and managing marine organisms but have not been evaluated for the western North Atlantic Ocean since 1979. To address this gap in knowledge, we used samples from 369 female and 488 male blue sharks collected during 1971–2016 and examined whether maturity parameters have changed over time. We compared sexspecific fork length (FL) (L50) and weight (W50) at median maturity between 2 time periods (1971–1977 and 2003–2016). No evidence of change in either L50 or W50 was observed for females. Males had a statistically significant increase in both parameters; however, this increase was likely the result of differences in sample size range between the time periods. Thus, all data from 1971 through 2016 were combined to obtain new estimates of age and size at 50% maturity for both sexes. The L50 and W50 are 192.5 cm FL and 49.5 kg for male blue sharks and 190.9 cm FL and 50.1 kg for female blue sharks. These updated L50 and W50 increase reliability of data inputs for fisheries management.
{"title":"Reproductive characteristics for the blue shark (Prionace glauca) in the North Atlantic Ocean","authors":"Katherine Viducic, L. Natanson, M. Winton, A. Humphries","doi":"10.7755/fb.120.1.3","DOIUrl":"https://doi.org/10.7755/fb.120.1.3","url":null,"abstract":"4 University of Rhode Island 120 Flagg Road Kingston, Rhode Island 02881 Abstract—The blue shark (Prionace glauca) in the North Atlantic Ocean is caught in large numbers in commercial fisheries and faces the possibility of overfishing. Reproductive parameters, such as size and age at maturity, are important descriptors of life history characteristics used for understanding and managing marine organisms but have not been evaluated for the western North Atlantic Ocean since 1979. To address this gap in knowledge, we used samples from 369 female and 488 male blue sharks collected during 1971–2016 and examined whether maturity parameters have changed over time. We compared sexspecific fork length (FL) (L50) and weight (W50) at median maturity between 2 time periods (1971–1977 and 2003–2016). No evidence of change in either L50 or W50 was observed for females. Males had a statistically significant increase in both parameters; however, this increase was likely the result of differences in sample size range between the time periods. Thus, all data from 1971 through 2016 were combined to obtain new estimates of age and size at 50% maturity for both sexes. The L50 and W50 are 192.5 cm FL and 49.5 kg for male blue sharks and 190.9 cm FL and 50.1 kg for female blue sharks. These updated L50 and W50 increase reliability of data inputs for fisheries management.","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46606672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reproductive characteristics for the blue shark (Prionace glauca) in the North Atlantic Ocean: supplementary figs. 1-3","authors":"Katherine Viducic","doi":"10.7755/fb.120.1.3s2","DOIUrl":"https://doi.org/10.7755/fb.120.1.3s2","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46151028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reproductive characteristics for the blue shark (Prionace glauca) in the North Atlantic Ocean: supplementary figure 4","authors":"Katherine Viducic","doi":"10.7755/fb.120.1.3s3","DOIUrl":"https://doi.org/10.7755/fb.120.1.3s3","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44040747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Validation of methods for aging goosefish (Lophius americanus) based on length-mode progression of a strong cohort: supplementary table","authors":"Sandra J. Sutherland, R. A. Richards","doi":"10.7755/fb.120.1.2s","DOIUrl":"https://doi.org/10.7755/fb.120.1.2s","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42899036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Northeast Fisheries Science Center National Marine Fisheries Service, NOAA 166 Water Street Woods Hole, Massachusetts 02543 Abstract—An unusually strong year class of goosefish (Lophius americanus) was first observed in the spring of 2015, and the length mode for this particular cohort remained evident for several years. We collected monthly samples from within this length mode over a period of 3 years and considered them fish with known ages for validating ages estimated by using illicia and vertebrae. Recent research had found vertebral ages for goosefish to be inaccurate, and a method in which illicia are used for Lophius species in Europe seemed promising. However, ring counts from illicia matched the known age only 50% of the time and were not replicable (9% agreement). Ring counts from vertebrae never matched the known age but were replicable in 68% of samples. Marginal increment analysis of illicia from fish that matched the known age provided evidence that one annulus is formed on the illicium in spring or summer of each year for fish aged from 1 to 2 years. Because of the low accuracy of age estimates made with both illicia and vertebrae, as well as the high bias of aging with vertebrae, we concluded that the methods based on these structures did not provide useful age estimates of goosefish. The observed growth rate, based on the progression of the length mode during our study, was much faster than the growth rates based on vertebral ages.
{"title":"Validation of methods for aging goosefish (Lophius americanus) based on length-mode progression of a strong cohort","authors":"Sandra J. Sutherland, R. A. Richards","doi":"10.7755/fb.120.1.2","DOIUrl":"https://doi.org/10.7755/fb.120.1.2","url":null,"abstract":"Northeast Fisheries Science Center National Marine Fisheries Service, NOAA 166 Water Street Woods Hole, Massachusetts 02543 Abstract—An unusually strong year class of goosefish (Lophius americanus) was first observed in the spring of 2015, and the length mode for this particular cohort remained evident for several years. We collected monthly samples from within this length mode over a period of 3 years and considered them fish with known ages for validating ages estimated by using illicia and vertebrae. Recent research had found vertebral ages for goosefish to be inaccurate, and a method in which illicia are used for Lophius species in Europe seemed promising. However, ring counts from illicia matched the known age only 50% of the time and were not replicable (9% agreement). Ring counts from vertebrae never matched the known age but were replicable in 68% of samples. Marginal increment analysis of illicia from fish that matched the known age provided evidence that one annulus is formed on the illicium in spring or summer of each year for fish aged from 1 to 2 years. Because of the low accuracy of age estimates made with both illicia and vertebrae, as well as the high bias of aging with vertebrae, we concluded that the methods based on these structures did not provide useful age estimates of goosefish. The observed growth rate, based on the progression of the length mode during our study, was much faster than the growth rates based on vertebral ages.","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48187337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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