R. Wilborn, I. Spies, P. Goddard, C. Rooper, J. W. Orr
— The role of deepwater corals and sponges in the life history of fish species is generally unknown for the larval stage. In 2017, we deployed an autonomous plankton pump into deepwater coral habitat (depths: >50 m) to examine which species were present and captured a single rockfish larva. Using genetic methods, we identified the larva as a northern rockfish ( Sebastes polyspinis ). The unique capture of a free-swimming larva with a plankton pump in this study is the first in situ record of the use of deepwater coral habitat by rockfish larvae. Subsequent reex- amination of coral specimens captured in bottom- trawl surveys that had been conducted in the Gulf of Alaska yielded an additional 10 northern rockfish larvae and a single harlequin rockfish ( S. variegatus ) larva lodged in the pol- yps of 2 species of deepwater coral. The results of this study improve our knowledge of the early life history of rockfish species, a taxonomic group that has limited lifetime dispersal indicated by a high degree of population structure. The capture and identification of the larva also indicate a potential mechanism for larval retention in the area of their extrusion and highlight the further importance of deepwater coral habitat as essential habitat for rockfish species.
{"title":"First observation of the use of coral habitat by larval northern rockfish (Sebastes polyspinis) in the western Gulf of Alaska","authors":"R. Wilborn, I. Spies, P. Goddard, C. Rooper, J. W. Orr","doi":"10.7755/fb.120.1.7","DOIUrl":"https://doi.org/10.7755/fb.120.1.7","url":null,"abstract":"— The role of deepwater corals and sponges in the life history of fish species is generally unknown for the larval stage. In 2017, we deployed an autonomous plankton pump into deepwater coral habitat (depths: >50 m) to examine which species were present and captured a single rockfish larva. Using genetic methods, we identified the larva as a northern rockfish ( Sebastes polyspinis ). The unique capture of a free-swimming larva with a plankton pump in this study is the first in situ record of the use of deepwater coral habitat by rockfish larvae. Subsequent reex- amination of coral specimens captured in bottom- trawl surveys that had been conducted in the Gulf of Alaska yielded an additional 10 northern rockfish larvae and a single harlequin rockfish ( S. variegatus ) larva lodged in the pol- yps of 2 species of deepwater coral. The results of this study improve our knowledge of the early life history of rockfish species, a taxonomic group that has limited lifetime dispersal indicated by a high degree of population structure. The capture and identification of the larva also indicate a potential mechanism for larval retention in the area of their extrusion and highlight the further importance of deepwater coral habitat as essential habitat for rockfish species.","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42811968","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":"Characterizing spawning behavior of Greenland halibut (Reinhardtius hippoglossoides) in the eastern Bering Sea and Aleutian Islands: supplementary figs. 3 and 4","authors":"K. Siwicke","doi":"10.7755/fb.120.1.5s3","DOIUrl":"https://doi.org/10.7755/fb.120.1.5s3","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48582278","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}
2 Department of Fisheries College of Fisheries and Ocean Sciences University of Alaska Fairbanks P.O. Box 757220 Fairbanks, Alaska 99775 Abstract—Understanding spawning behavior of commercial fish populations provides a basis for making management decisions related to these stocks. Archival tags can be used to define spawning behavior when depthspecific movements are involved. Spawning behavior of Greenland halibut (Reinhardtius hippoglossoides) in the eastern Bering Sea and the Aleutian Islands was inferred from archival tag data. The predominant period of identified spawning activity, based on abrupt vertical rises of females, occurred in January and February, and females reached apexes in their upward movement (spawning rises) at depths of approximately 200–350 m below the surface, indicating that the release of eggs could occur at depths shallower than previously assumed. Females had a single spawning rise annually, a result supporting the notion that this species is a total (singlebatch) spawner. Male Greenland halibut exhibited spawning behavior, rises to shallower depths one or more times, for an average of 20 d. For large female Greenland halibut (>80 cm in fork length), spawning rises occurred in consecutive years, indicating that, despite oocyte development taking more than 1 year, spawning occurs annually. Inferring spawning behavior by using data collected with archival tags can aid in understanding the maturity of Greenland halibut.
{"title":"Characterizing spawning behavior of Greenland halibut (Reinhardtius hippoglossoides) in the eastern Bering Sea and Aleutian Islands","authors":"K. Siwicke, A. Seitz, C. Rodgveller, K. Echave","doi":"10.7755/fb.120.1.5","DOIUrl":"https://doi.org/10.7755/fb.120.1.5","url":null,"abstract":"2 Department of Fisheries College of Fisheries and Ocean Sciences University of Alaska Fairbanks P.O. Box 757220 Fairbanks, Alaska 99775 Abstract—Understanding spawning behavior of commercial fish populations provides a basis for making management decisions related to these stocks. Archival tags can be used to define spawning behavior when depthspecific movements are involved. Spawning behavior of Greenland halibut (Reinhardtius hippoglossoides) in the eastern Bering Sea and the Aleutian Islands was inferred from archival tag data. The predominant period of identified spawning activity, based on abrupt vertical rises of females, occurred in January and February, and females reached apexes in their upward movement (spawning rises) at depths of approximately 200–350 m below the surface, indicating that the release of eggs could occur at depths shallower than previously assumed. Females had a single spawning rise annually, a result supporting the notion that this species is a total (singlebatch) spawner. Male Greenland halibut exhibited spawning behavior, rises to shallower depths one or more times, for an average of 20 d. For large female Greenland halibut (>80 cm in fork length), spawning rises occurred in consecutive years, indicating that, despite oocyte development taking more than 1 year, spawning occurs annually. Inferring spawning behavior by using data collected with archival tags can aid in understanding the maturity of Greenland halibut.","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47741746","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}
Rebekah C. James, T. Curtis, B. Galuardi, G. Metzger, A. Newton, M. McCallister, G. C. Fischer, M. Ajemian
{"title":"Overwinter habitat use of young-of-the-year white sharks (Carcharodon carcharias) off the eastern United States","authors":"Rebekah C. James, T. Curtis, B. Galuardi, G. Metzger, A. Newton, M. McCallister, G. C. Fischer, M. Ajemian","doi":"10.7755/fb.120.1.6","DOIUrl":"https://doi.org/10.7755/fb.120.1.6","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49342926","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":"Characterizing spawning behavior of Greenland halibut (Reinhardtius hippoglossoides) in the eastern Bering Sea and Aleutian Islands: supplementary materials","authors":"","doi":"10.7755/fb.120.1.5s4","DOIUrl":"https://doi.org/10.7755/fb.120.1.5s4","url":null,"abstract":"","PeriodicalId":50442,"journal":{"name":"Fishery Bulletin","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44758268","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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