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Seasonal presence and potential influence of humpback whales on wintering Pacific herring populations in the Gulf of Alaska.

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Title: Seasonal presence and potential influence of humpback whales on wintering Pacific herring populations in the Gulf of Alaska.
Authors: Straley, Janice M.1 jmstraley@alaska.edu, Moran, John R.2, Boswell, Kevin M.3, Vollenweider, Johanna J.2, Heintz, Ron A.2, Quinn II, Terrance J.4, Witteveen, Briana H.5, Rice, Stanley D.2
Source: Deep-Sea Research Part II, Topical Studies in Oceanography. Jan2018, Vol. 147, p173-186. 14p.
Subjects: Pacific herring, Predation, Humpback whale, Fish migration & climate
Geographic Terms: Prince William Sound (Alaska), Alaska
Abstract: This study addressed the lack of recovery of Pacific herring ( Clupea pallasii ) in Prince William Sound, Alaska, in relation to humpback whale ( Megaptera novaeangliae ) predation. As humpback whales rebound from commercial whaling, their ability to influence their prey through top-down forcing increases. We compared the potential influence of foraging humpback whales on three herring populations in the coastal Gulf of Alaska: Prince William Sound, Lynn Canal, and Sitka Sound (133–147°W; 57–61°N) from 2007 to 2009. Information on whale distribution, abundance, diet and the availability of herring as potential prey were used to correlate populations of overwintering herring and humpback whales. In Prince William Sound, the presence of whales coincided with the peak of herring abundance, allowing whales to maximize the consumption of overwintering herring prior to their southern migration. In Lynn Canal and Sitka Sound peak attendance of whales occurred earlier, in the fall, before the herring had completely moved into the areas, hence, there was less opportunity for predation to influence herring populations. North Pacific humpback whales in the Gulf of Alaska may be experiencing nutritional stress from reaching or exceeding carrying capacity, or oceanic conditions may have changed sufficiently to alter the prey base. Intraspecific competition for food may make it harder for humpback whales to meet their annual energetic needs. To meet their energetic demands whales may need to lengthen their time feeding in the northern latitudes or by skipping the annual migration altogether. If humpback whales extended their time feeding in Alaskan waters during the winter months, the result would likely be an increase in herring predation. [ABSTRACT FROM AUTHOR]
Copyright of Deep-Sea Research Part II, Topical Studies in Oceanography is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 128184591
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  Data: Seasonal presence and potential influence of humpback whales on wintering Pacific herring populations in the Gulf of Alaska.
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  Data: <searchLink fieldCode="AR" term="%22Straley%2C+Janice+M%2E%22">Straley, Janice M.</searchLink><relatesTo>1</relatesTo><i> jmstraley@alaska.edu</i><br /><searchLink fieldCode="AR" term="%22Moran%2C+John+R%2E%22">Moran, John R.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Boswell%2C+Kevin+M%2E%22">Boswell, Kevin M.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Vollenweider%2C+Johanna+J%2E%22">Vollenweider, Johanna J.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Heintz%2C+Ron+A%2E%22">Heintz, Ron A.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Quinn+II%2C+Terrance+J%2E%22">Quinn II, Terrance J.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Witteveen%2C+Briana+H%2E%22">Witteveen, Briana H.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Rice%2C+Stanley+D%2E%22">Rice, Stanley D.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Deep-Sea+Research+Part+II%2C+Topical+Studies+in+Oceanography%22">Deep-Sea Research Part II, Topical Studies in Oceanography</searchLink>. Jan2018, Vol. 147, p173-186. 14p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Pacific+herring%22">Pacific herring</searchLink><br /><searchLink fieldCode="DE" term="%22Predation%22">Predation</searchLink><br /><searchLink fieldCode="DE" term="%22Humpback+whale%22">Humpback whale</searchLink><br /><searchLink fieldCode="DE" term="%22Fish+migration+%26+climate%22">Fish migration & climate</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
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  Data: <searchLink fieldCode="DE" term="%22Prince+William+Sound+%28Alaska%29%22">Prince William Sound (Alaska)</searchLink><br /><searchLink fieldCode="DE" term="%22Alaska%22">Alaska</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study addressed the lack of recovery of Pacific herring ( Clupea pallasii ) in Prince William Sound, Alaska, in relation to humpback whale ( Megaptera novaeangliae ) predation. As humpback whales rebound from commercial whaling, their ability to influence their prey through top-down forcing increases. We compared the potential influence of foraging humpback whales on three herring populations in the coastal Gulf of Alaska: Prince William Sound, Lynn Canal, and Sitka Sound (133–147°W; 57–61°N) from 2007 to 2009. Information on whale distribution, abundance, diet and the availability of herring as potential prey were used to correlate populations of overwintering herring and humpback whales. In Prince William Sound, the presence of whales coincided with the peak of herring abundance, allowing whales to maximize the consumption of overwintering herring prior to their southern migration. In Lynn Canal and Sitka Sound peak attendance of whales occurred earlier, in the fall, before the herring had completely moved into the areas, hence, there was less opportunity for predation to influence herring populations. North Pacific humpback whales in the Gulf of Alaska may be experiencing nutritional stress from reaching or exceeding carrying capacity, or oceanic conditions may have changed sufficiently to alter the prey base. Intraspecific competition for food may make it harder for humpback whales to meet their annual energetic needs. To meet their energetic demands whales may need to lengthen their time feeding in the northern latitudes or by skipping the annual migration altogether. If humpback whales extended their time feeding in Alaskan waters during the winter months, the result would likely be an increase in herring predation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Deep-Sea Research Part II, Topical Studies in Oceanography is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=128184591
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      – Type: doi
        Value: 10.1016/j.dsr2.2017.08.008
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      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 173
    Subjects:
      – SubjectFull: Pacific herring
        Type: general
      – SubjectFull: Predation
        Type: general
      – SubjectFull: Humpback whale
        Type: general
      – SubjectFull: Fish migration & climate
        Type: general
      – SubjectFull: Prince William Sound (Alaska)
        Type: general
      – SubjectFull: Alaska
        Type: general
    Titles:
      – TitleFull: Seasonal presence and potential influence of humpback whales on wintering Pacific herring populations in the Gulf of Alaska.
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              Text: Jan2018
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              Y: 2018
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