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Comparative stable isotope analyses of green sturgeon (Acipenser medirostris) and white sturgeon (A. transmontanus) in the San Francisco estuary.

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Title: Comparative stable isotope analyses of green sturgeon (Acipenser medirostris) and white sturgeon (A. transmontanus) in the San Francisco estuary.
Authors: Miller, Emily A.1,2 (AUTHOR) emilyamiller@gmail.com, Singer, Gabriel P.2 (AUTHOR), Peterson, Matthew L.2 (AUTHOR), Webb, Molly3 (AUTHOR), Klimley, A. Peter2 (AUTHOR)
Source: Journal of Fish Biology. Jan2024, Vol. 104 Issue 1, p240-251. 12p.
Subjects: Stable isotope analysis, Acipenser, Sturgeons, Marine biology, Blood plasma, Nitrogen isotopes
Geographic Terms: San Francisco Bay (Calif.), San Francisco (Calif.), Sacramento (Calif.)
Abstract: Green sturgeon (Acipenser medirostris) and white sturgeon (A. transmontanus) are closely related, sympatric species that inhabit the San Francisco estuary. Green sturgeon have a more marine life history but both species spawn in the Sacramento River and reside for some duration in San Francisco Bay. These sturgeons are of conservation concern, yet little is known about their dietary competition when they overlap in space and time. To examine evidence of dietary differentiation, we collected whole blood and blood plasma from 26 green sturgeon and 35 white sturgeon in San Francisco Bay. Using carbon and nitrogen stable isotope analyses, we compared their relative trophic levels and foraging locations along the freshwater to marine gradient. Sampling blood plasma and whole blood allowed comparison of dietary integration over shorter and longer time scales, respectively. Plasma and whole blood δ13C values confirmed green sturgeon had more marine dietary sources than white sturgeon. Plasma δ15N values revealed white sturgeon fed at lower trophic levels than green sturgeon recently, however, whole blood δ15N values demonstrated the two species fed at the same trophic level over longer time scales. Larger individuals of both species had higher δ13C values than smaller individuals, reflecting more marine food sources in adulthood. Length did not affect δ15N values of either species. Isotope analyses supported the more marine life history of green than white sturgeon and potentially highlight a temporary trophic differentiation of diet between species during and preceding the overlapping life stage in San Francisco Bay. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Fish Biology is the property of Wiley-Blackwell 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
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Comparative stable isotope analyses of green sturgeon (Acipenser medirostris) and white sturgeon (A. transmontanus) in the San Francisco estuary.
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  Data: <searchLink fieldCode="AR" term="%22Miller%2C+Emily+A%2E%22">Miller, Emily A.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> emilyamiller@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Singer%2C+Gabriel+P%2E%22">Singer, Gabriel P.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Peterson%2C+Matthew+L%2E%22">Peterson, Matthew L.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Webb%2C+Molly%22">Webb, Molly</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Klimley%2C+A%2E+Peter%22">Klimley, A. Peter</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Fish+Biology%22">Journal of Fish Biology</searchLink>. Jan2024, Vol. 104 Issue 1, p240-251. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Stable+isotope+analysis%22">Stable isotope analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Acipenser%22">Acipenser</searchLink><br /><searchLink fieldCode="DE" term="%22Sturgeons%22">Sturgeons</searchLink><br /><searchLink fieldCode="DE" term="%22Marine+biology%22">Marine biology</searchLink><br /><searchLink fieldCode="DE" term="%22Blood+plasma%22">Blood plasma</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrogen+isotopes%22">Nitrogen isotopes</searchLink>
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  Label: Geographic Terms
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  Data: <searchLink fieldCode="DE" term="%22San+Francisco+Bay+%28Calif%2E%29%22">San Francisco Bay (Calif.)</searchLink><br /><searchLink fieldCode="DE" term="%22San+Francisco+%28Calif%2E%29%22">San Francisco (Calif.)</searchLink><br /><searchLink fieldCode="DE" term="%22Sacramento+%28Calif%2E%29%22">Sacramento (Calif.)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Green sturgeon (Acipenser medirostris) and white sturgeon (A. transmontanus) are closely related, sympatric species that inhabit the San Francisco estuary. Green sturgeon have a more marine life history but both species spawn in the Sacramento River and reside for some duration in San Francisco Bay. These sturgeons are of conservation concern, yet little is known about their dietary competition when they overlap in space and time. To examine evidence of dietary differentiation, we collected whole blood and blood plasma from 26 green sturgeon and 35 white sturgeon in San Francisco Bay. Using carbon and nitrogen stable isotope analyses, we compared their relative trophic levels and foraging locations along the freshwater to marine gradient. Sampling blood plasma and whole blood allowed comparison of dietary integration over shorter and longer time scales, respectively. Plasma and whole blood δ13C values confirmed green sturgeon had more marine dietary sources than white sturgeon. Plasma δ15N values revealed white sturgeon fed at lower trophic levels than green sturgeon recently, however, whole blood δ15N values demonstrated the two species fed at the same trophic level over longer time scales. Larger individuals of both species had higher δ13C values than smaller individuals, reflecting more marine food sources in adulthood. Length did not affect δ15N values of either species. Isotope analyses supported the more marine life history of green than white sturgeon and potentially highlight a temporary trophic differentiation of diet between species during and preceding the overlapping life stage in San Francisco Bay. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Fish Biology is the property of Wiley-Blackwell 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.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1111/jfb.15579
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 12
        StartPage: 240
    Subjects:
      – SubjectFull: Stable isotope analysis
        Type: general
      – SubjectFull: Acipenser
        Type: general
      – SubjectFull: Sturgeons
        Type: general
      – SubjectFull: Marine biology
        Type: general
      – SubjectFull: Blood plasma
        Type: general
      – SubjectFull: Nitrogen isotopes
        Type: general
      – SubjectFull: San Francisco Bay (Calif.)
        Type: general
      – SubjectFull: San Francisco (Calif.)
        Type: general
      – SubjectFull: Sacramento (Calif.)
        Type: general
    Titles:
      – TitleFull: Comparative stable isotope analyses of green sturgeon (Acipenser medirostris) and white sturgeon (A. transmontanus) in the San Francisco estuary.
        Type: main
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            NameFull: Miller, Emily A.
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            NameFull: Singer, Gabriel P.
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            NameFull: Peterson, Matthew L.
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            NameFull: Webb, Molly
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            NameFull: Klimley, A. Peter
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            – D: 01
              M: 01
              Text: Jan2024
              Type: published
              Y: 2024
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              Value: 104
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