{"title":"Distribution of the tiger shark (Galeocerdo cuvier) in the North Atlantic Ocean by season, sex, and life stage, based on tag and recapture data: supp. fig. 4","authors":"Lisa J. Natanson","doi":"10.7755/fb.121.4.1s3","DOIUrl":"https://doi.org/10.7755/fb.121.4.1s3","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136212037","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}
Lisa J. Natanson, Camilla T. McCandless, Nancy E. Kohler
— Movements of the tiger shark ( Galeocerdo cuvier ) by life stage are largely unknown yet are necessary to determine essential fish habitat and sustainable fishery management practices. In an effort to elucidate distribution and movements of the tiger shark, we analyzed fishery-dependent and - independent tag (sample size [ n ]=10,516) and recapture ( n =762) records for sharks caught in the North Atlantic Ocean during 1963–2018. Sea-sonal distribution of the tiger shark was examined by life stage— young of the year, juveniles (immature), and adults (mature)— and distribution patterns were used to identify potential nursery habitat. Tiger sharks were caught over a wide area from the Grand Banks of Newfoundland, Canada, south to Brazil and from coastal to offshore waters and into the eastern North Atlantic Ocean. Seasonal north–south movements were observed in all life stages, and 14 immature sharks were found to have migrated from the western to the eastern North Atlantic Ocean. A broad nursery area and a potential birthing area were identified on the continental shelf between Florida and Georgia on the basis of the repeated presence of neonates in summer across years and of the recapture of multiple tagged young- of- the-year
{"title":"Distribution of the tiger shark (Galeocerdo cuvier) in the North Atlantic Ocean by season, sex, and life stage, based on tag and recapture data","authors":"Lisa J. Natanson, Camilla T. McCandless, Nancy E. Kohler","doi":"10.7755/fb.121.1.4","DOIUrl":"https://doi.org/10.7755/fb.121.1.4","url":null,"abstract":"— Movements of the tiger shark ( Galeocerdo cuvier ) by life stage are largely unknown yet are necessary to determine essential fish habitat and sustainable fishery management practices. In an effort to elucidate distribution and movements of the tiger shark, we analyzed fishery-dependent and - independent tag (sample size [ n ]=10,516) and recapture ( n =762) records for sharks caught in the North Atlantic Ocean during 1963–2018. Sea-sonal distribution of the tiger shark was examined by life stage— young of the year, juveniles (immature), and adults (mature)— and distribution patterns were used to identify potential nursery habitat. Tiger sharks were caught over a wide area from the Grand Banks of Newfoundland, Canada, south to Brazil and from coastal to offshore waters and into the eastern North Atlantic Ocean. Seasonal north–south movements were observed in all life stages, and 14 immature sharks were found to have migrated from the western to the eastern North Atlantic Ocean. A broad nursery area and a potential birthing area were identified on the continental shelf between Florida and Georgia on the basis of the repeated presence of neonates in summer across years and of the recapture of multiple tagged young- of- the-year","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136212189","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":"Recruitment of juvenile Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) in the Savannah, Ogeechee, and Satilla Rivers in Georgia: Supplementary table","authors":"Adam G. Fox","doi":"10.7755/fb.121.3.7s","DOIUrl":"https://doi.org/10.7755/fb.121.3.7s","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45654435","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}
Adam G. Fox, Michael A. Baker, Alexander J. Cummins, Hudman S. Evans Jr., Katherine L. Cummins, Nathaniel Q. Hancock, David L. Higginbotham
— The Atlantic sturgeon ( Acip-enser oxyrinchus oxyrinchus ) is a anad-romous fish found along the east coast of North America and is listed under the Endangered Species Act of the United States. Decades of overfishing and habitat degradation have caused range-wide population declines, and the population status of this species in many rivers is unclear. Quantifying annual recruitment is one way to assess the status of sturgeon populations, but such assessments are few. The objective of this study was to quantify recruitment of juvenile Atlantic sturgeon in the Savannah, Ogeechee, and Satilla Rivers in Georgia. Because we used identical methods in 3 rivers simultaneously, we were able to directly compare recruitment among these populations with that of other populations observed in contemporaneous studies in other rivers. We conducted mark-recapture sampling during 2014–2017 and used Huggins closed population models to estimate annual recruitment. Because there are no historical data for comparison, we evaluated the 3 populations
{"title":"Recruitment of juvenile Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) in the Savannah, Ogeechee, and Satilla Rivers in Georgia","authors":"Adam G. Fox, Michael A. Baker, Alexander J. Cummins, Hudman S. Evans Jr., Katherine L. Cummins, Nathaniel Q. Hancock, David L. Higginbotham","doi":"10.7755/fb.121.3.7","DOIUrl":"https://doi.org/10.7755/fb.121.3.7","url":null,"abstract":"— The Atlantic sturgeon ( Acip-enser oxyrinchus oxyrinchus ) is a anad-romous fish found along the east coast of North America and is listed under the Endangered Species Act of the United States. Decades of overfishing and habitat degradation have caused range-wide population declines, and the population status of this species in many rivers is unclear. Quantifying annual recruitment is one way to assess the status of sturgeon populations, but such assessments are few. The objective of this study was to quantify recruitment of juvenile Atlantic sturgeon in the Savannah, Ogeechee, and Satilla Rivers in Georgia. Because we used identical methods in 3 rivers simultaneously, we were able to directly compare recruitment among these populations with that of other populations observed in contemporaneous studies in other rivers. We conducted mark-recapture sampling during 2014–2017 and used Huggins closed population models to estimate annual recruitment. Because there are no historical data for comparison, we evaluated the 3 populations","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48159150","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":"Effect of reduction in spatial survey effort on indices of bottom temperature for the eastern Bering Sea: Suppl. fig. 1","authors":"C. Yeung","doi":"10.7755/fb.121.3.5s1","DOIUrl":"https://doi.org/10.7755/fb.121.3.5s1","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42797349","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}
— Bottom temperature is routinely measured as part of the bottom-trawl survey conducted every summer on the continental shelf of the eastern Bering Sea by the NOAA Alaska Fisheries Science Center. These data are widely used in ecosystem, stock assessment, and ocean modeling. We assessed the effect of alternative sampling designs and effort reduction on the quality of bottom-temperature information from the survey. Simple-random and stratified-random sampling were simulated and compared with the systematic sampling of fixed stations in the regular grid used in the standard survey, with respect to the use of survey data in the estimation of bottom temperatures and related indices. The effort simulated ranged from 34% to 100% of the full effort. In the simulated surveys, the use of each of the 3 sampling designs resulted in values of bottom-temperature metrics that are close to those from the real survey, even with as little as half the effort. Lower effort resulted in larger and more variable prediction errors of the indices. The decrease in prediction performance is most noticeable at the 34% effort level. Systematic sampling performed slightly better than simple-random and stratified-random sampling. One reason for this difference in performance is that random sampling may have been less effective than the standard sampling in capturing a small cold pool that is characteristic of the current warm ocean state.
{"title":"Effect of reduction in spatial survey effort on indices of bottom temperature for the eastern Bering Sea","authors":"C. Yeung, S. Kotwicki, S. Rohan","doi":"10.7755/fb.121.3.5","DOIUrl":"https://doi.org/10.7755/fb.121.3.5","url":null,"abstract":"— Bottom temperature is routinely measured as part of the bottom-trawl survey conducted every summer on the continental shelf of the eastern Bering Sea by the NOAA Alaska Fisheries Science Center. These data are widely used in ecosystem, stock assessment, and ocean modeling. We assessed the effect of alternative sampling designs and effort reduction on the quality of bottom-temperature information from the survey. Simple-random and stratified-random sampling were simulated and compared with the systematic sampling of fixed stations in the regular grid used in the standard survey, with respect to the use of survey data in the estimation of bottom temperatures and related indices. The effort simulated ranged from 34% to 100% of the full effort. In the simulated surveys, the use of each of the 3 sampling designs resulted in values of bottom-temperature metrics that are close to those from the real survey, even with as little as half the effort. Lower effort resulted in larger and more variable prediction errors of the indices. The decrease in prediction performance is most noticeable at the 34% effort level. Systematic sampling performed slightly better than simple-random and stratified-random sampling. One reason for this difference in performance is that random sampling may have been less effective than the standard sampling in capturing a small cold pool that is characteristic of the current warm ocean state.","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45181746","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":"Effect of reduction in spatial survey effort on indices of bottom temperature for the eastern Bering Sea: Suppl. fig. 2","authors":"C. Yeung","doi":"10.7755/fb.121.3.5s2","DOIUrl":"https://doi.org/10.7755/fb.121.3.5s2","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42837210","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}
M. Morris, R. D. Ledgerwood, Alexander J. Borsky, G. Brooks, P. J. Bentley
— A novel antenna design has been developed to detect fish implanted with full-duplex passive integrated transponder (PIT) tags. The antenna is constructed of light-weight flexible hose and measures 2.4 by 6.1 m, providing a substantially larger reading range than other PIT antennas. Herein, we describe its use in a small instream monitoring system to detect migrating smolts of steelhead ( Oncorhynchus mykiss ). During testing, the combined detection efficiency for the 2 arrays of antennas with the new design was 97%, which is comparable to efficiencies of standard antennas made with polyvinyl chloride or high-density polyethylene. The lightweight, flexible design of the new antenna affords relatively easy transportation and deployment compared with that of rigid antennas, and smaller crews and vessels are needed for its maintenance and deployment. The development of the flexible antenna has expanded the utility of PIT technology by increasing the scope of potential sampling applications to a wider range of habitats and environmental conditions.
{"title":"Development and use of a large, flexible antenna to detect fish implanted with passive integrated transponder tags","authors":"M. Morris, R. D. Ledgerwood, Alexander J. Borsky, G. Brooks, P. J. Bentley","doi":"10.7755/fb.121.3.6","DOIUrl":"https://doi.org/10.7755/fb.121.3.6","url":null,"abstract":"— A novel antenna design has been developed to detect fish implanted with full-duplex passive integrated transponder (PIT) tags. The antenna is constructed of light-weight flexible hose and measures 2.4 by 6.1 m, providing a substantially larger reading range than other PIT antennas. Herein, we describe its use in a small instream monitoring system to detect migrating smolts of steelhead ( Oncorhynchus mykiss ). During testing, the combined detection efficiency for the 2 arrays of antennas with the new design was 97%, which is comparable to efficiencies of standard antennas made with polyvinyl chloride or high-density polyethylene. The lightweight, flexible design of the new antenna affords relatively easy transportation and deployment compared with that of rigid antennas, and smaller crews and vessels are needed for its maintenance and deployment. The development of the flexible antenna has expanded the utility of PIT technology by increasing the scope of potential sampling applications to a wider range of habitats and environmental conditions.","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42806376","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":"Timing and environmental drivers of spawning migrations of alewife (Alosa pseudoharengus) and blueback herring (A. aestivalis) in rivers of Chesapeake Bay: Supplementary figure 7","authors":"Henry D. Legett","doi":"10.7755/fb.121.3.4s7","DOIUrl":"https://doi.org/10.7755/fb.121.3.4s7","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47415470","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":"Timing and environmental drivers of spawning migrations of alewife(Alosa pseudoharengus) and blueback herring (A. aestivalis) in rivers of Chesapeake Bay: Supplementa ry tables 3-6","authors":"Henry D. Legett","doi":"10.7755/fb.121.3.4s3","DOIUrl":"https://doi.org/10.7755/fb.121.3.4s3","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47944369","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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