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Isotope geochemistry reveals ontogeny of dispersal and exchange between main-river and tributary habitats in smallmouth bass Micropterus dolomieu.

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Title: Isotope geochemistry reveals ontogeny of dispersal and exchange between main-river and tributary habitats in smallmouth bass Micropterus dolomieu.
Authors: Humston, R.1, Doss, S. S.1, Wass, C.1, Hollenbeck, C.2, Thorrold, S. R.3, Smith, S.4, Bataille, C. P.5
Source: Journal of Fish Biology. Feb2017, Vol. 90 Issue 2, p528-548. 21p.
Subjects: Smallmouth bass, Strontium isotopes, Fishes, Otolith organs, Geochemistry, Fish habitats, Ontogeny
Abstract: Radiogenic strontium isotope ratios ( 87Sr: 86Sr) in otoliths were compared with isotope ratios predicted from models and observed in water sampling to reconstruct the movement histories of smallmouth bass Micropterus dolomieu between main-river and adjacent tributary habitats. A mechanistic model incorporating isotope geochemistry, weathering processes and basin accumulation reasonably predicted observed river 87Sr: 86Sr across the study area and provided the foundations for experimental design and inferring fish provenance. Exchange between rivers occurred frequently, with nearly half (48%) of the 209 individuals displaying changes in otolith 87Sr: 86Sr reflecting movement between isotopically distinct rivers. The majority of between-river movements occurred in the first year and often within the first few months of life. Although more individuals were observed moving from the main river into tributaries, this pattern did not necessarily reflect asymmetry in exchange. Several individuals made multiple movements between rivers over their lifetimes; no patterns were found, however, that suggest seasonal or migratory movement. The main-river sport fishery is strongly supported by recruitment from tributary spawning, as 26% of stock size individuals in the main river were spawned in tributaries. The prevailing pattern of early juvenile dispersal documented in this study has not been observed previously for this species and suggests that the process of establishing seasonal home-range areas occurs up to 2 years earlier than originally hypothesized. Extensive exchange between rivers would have substantial implications for management of M. dolomieu populations in river-tributary networks. [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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Header DbId: egs
DbLabel: Engineering Source
An: 121349344
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Isotope geochemistry reveals ontogeny of dispersal and exchange between main-river and tributary habitats in smallmouth bass Micropterus dolomieu.
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  Data: <searchLink fieldCode="AR" term="%22Humston%2C+R%2E%22">Humston, R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Doss%2C+S%2E+S%2E%22">Doss, S. S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wass%2C+C%2E%22">Wass, C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Hollenbeck%2C+C%2E%22">Hollenbeck, C.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Thorrold%2C+S%2E+R%2E%22">Thorrold, S. R.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Smith%2C+S%2E%22">Smith, S.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Bataille%2C+C%2E+P%2E%22">Bataille, C. P.</searchLink><relatesTo>5</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Fish+Biology%22">Journal of Fish Biology</searchLink>. Feb2017, Vol. 90 Issue 2, p528-548. 21p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Smallmouth+bass%22">Smallmouth bass</searchLink><br /><searchLink fieldCode="DE" term="%22Strontium+isotopes%22">Strontium isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Fishes%22">Fishes</searchLink><br /><searchLink fieldCode="DE" term="%22Otolith+organs%22">Otolith organs</searchLink><br /><searchLink fieldCode="DE" term="%22Geochemistry%22">Geochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Fish+habitats%22">Fish habitats</searchLink><br /><searchLink fieldCode="DE" term="%22Ontogeny%22">Ontogeny</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Radiogenic strontium isotope ratios ( 87Sr: 86Sr) in otoliths were compared with isotope ratios predicted from models and observed in water sampling to reconstruct the movement histories of smallmouth bass Micropterus dolomieu between main-river and adjacent tributary habitats. A mechanistic model incorporating isotope geochemistry, weathering processes and basin accumulation reasonably predicted observed river 87Sr: 86Sr across the study area and provided the foundations for experimental design and inferring fish provenance. Exchange between rivers occurred frequently, with nearly half (48%) of the 209 individuals displaying changes in otolith 87Sr: 86Sr reflecting movement between isotopically distinct rivers. The majority of between-river movements occurred in the first year and often within the first few months of life. Although more individuals were observed moving from the main river into tributaries, this pattern did not necessarily reflect asymmetry in exchange. Several individuals made multiple movements between rivers over their lifetimes; no patterns were found, however, that suggest seasonal or migratory movement. The main-river sport fishery is strongly supported by recruitment from tributary spawning, as 26% of stock size individuals in the main river were spawned in tributaries. The prevailing pattern of early juvenile dispersal documented in this study has not been observed previously for this species and suggests that the process of establishing seasonal home-range areas occurs up to 2 years earlier than originally hypothesized. Extensive exchange between rivers would have substantial implications for management of M. dolomieu populations in river-tributary networks. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  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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    Identifiers:
      – Type: doi
        Value: 10.1111/jfb.13073
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 21
        StartPage: 528
    Subjects:
      – SubjectFull: Smallmouth bass
        Type: general
      – SubjectFull: Strontium isotopes
        Type: general
      – SubjectFull: Fishes
        Type: general
      – SubjectFull: Otolith organs
        Type: general
      – SubjectFull: Geochemistry
        Type: general
      – SubjectFull: Fish habitats
        Type: general
      – SubjectFull: Ontogeny
        Type: general
    Titles:
      – TitleFull: Isotope geochemistry reveals ontogeny of dispersal and exchange between main-river and tributary habitats in smallmouth bass Micropterus dolomieu.
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            NameFull: Doss, S. S.
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            NameFull: Wass, C.
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              M: 02
              Text: Feb2017
              Type: published
              Y: 2017
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