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Isotope Tools To Track Floodplain Rearing of Juvenile Chinook Salmon.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Isotope Tools To Track Floodplain Rearing of Juvenile Chinook Salmon./
作者:	Tilcock, Miranda Nichole.
面頁冊數:	1 online resource (50 pages)
附註:	Source: Masters Abstracts International, Volume: 81-03.
Contained By:	Masters Abstracts International81-03.
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13862230click for full text (PQDT)
ISBN:	9781085796026

Isotope Tools To Track Floodplain Rearing of Juvenile Chinook Salmon.
Tilcock, Miranda Nichole.

Isotope Tools To Track Floodplain Rearing of Juvenile Chinook Salmon. - 1 online resource (50 pages)

Source: Masters Abstracts International, Volume: 81-03.

Thesis (M.S.)--University of California, Davis, 2019.

Includes bibliographical references

Floodplains are widely recognized as core to the functioning of large river ecosystems, yet quantitative tools that could be used to estimate contributions of these habitats to ecosystems have long been lacking. In the Central Valley, California (USA), floodplains are critical nursery habitat for juvenile Chinook salmon due to highly productive food webs producing juvenile salmon with higher than average growth rates. Due to the decomposition of vegetation and other organic matter that occurs in floodplain environments, we predicted that fish reared on floodplains would have reduced 34S/32S and ¹³C/¹²C isotopic signatures compared to fish rearing in the adjacent river habitats. To test this, we used caged juvenile salmon of hatchery-origin and wild salmon sampled through time to determine whether 34S/32S and ¹³C/¹²C isotopic signatures in fish tissues can be used to quantify and track floodplain use. We characterized the biogeochemical and taxonomic differences in floodplain and riverine invertebrate prey items and compared those levels to those in fish tissues. We found that juvenile fish reared on floodplains had reduced 34S/32S and ¹³C/¹²C isotopic signatures in their stomach contents (δ³⁴S = -3.467‰ ± 2.27) and their tissues across multiple years, relative to salmon collected in the adjacent Sacramento River (δ³⁴S = +2.32‰ ± 2.50). Reduced 34S/32S and ¹³C/¹²C ratios found in archival fish tissues from fish reared in floodplain habitats can be used as a tool in order to track fish across complicated life-stages and heterogeneous habitats and quantify the role of floodplains as juvenile rearing habitats in fishery recruitment and productivity.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9781085796026Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Chinook salmonIndex Terms--Genre/Form:

542853
Electronic books.

Isotope Tools To Track Floodplain Rearing of Juvenile Chinook Salmon.
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500 $a Source: Masters Abstracts International, Volume: 81-03.
500 $a Advisor: Rypel, Andrew.
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504 $a Includes bibliographical references
520 $a Floodplains are widely recognized as core to the functioning of large river ecosystems, yet quantitative tools that could be used to estimate contributions of these habitats to ecosystems have long been lacking. In the Central Valley, California (USA), floodplains are critical nursery habitat for juvenile Chinook salmon due to highly productive food webs producing juvenile salmon with higher than average growth rates. Due to the decomposition of vegetation and other organic matter that occurs in floodplain environments, we predicted that fish reared on floodplains would have reduced 34S/32S and ¹³C/¹²C isotopic signatures compared to fish rearing in the adjacent river habitats. To test this, we used caged juvenile salmon of hatchery-origin and wild salmon sampled through time to determine whether 34S/32S and ¹³C/¹²C isotopic signatures in fish tissues can be used to quantify and track floodplain use. We characterized the biogeochemical and taxonomic differences in floodplain and riverine invertebrate prey items and compared those levels to those in fish tissues. We found that juvenile fish reared on floodplains had reduced 34S/32S and ¹³C/¹²C isotopic signatures in their stomach contents (δ³⁴S = -3.467‰ ± 2.27) and their tissues across multiple years, relative to salmon collected in the adjacent Sacramento River (δ³⁴S = +2.32‰ ± 2.50). Reduced 34S/32S and ¹³C/¹²C ratios found in archival fish tissues from fish reared in floodplain habitats can be used as a tool in order to track fish across complicated life-stages and heterogeneous habitats and quantify the role of floodplains as juvenile rearing habitats in fishery recruitment and productivity.
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538 $a Mode of access: World Wide Web
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650 4 $a Wildlife management. $3 571816
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653 $a Fish nurseries
653 $a Floodplains
653 $a Isotopes
653 $a Sulfur
653 $a Wetlands
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710 2 $a University of California, Davis. $b Ecology. $3 1678659
773 0 $t Masters Abstracts International $g 81-03.
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