Marine subsidies in freshwater: Effects of salmon carcasses on lipid class and fatty acid composition of juvenile coho salmon
Abstract.-Returning adult salmon represent an important source of energy, nutrients, and biochemicals to their natal streams and may therefore have a quantitative effect on the energy levels of stream-resident salmonids. We tested this hypothesis by constructing simulated streams for coho salmon Onc...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1072.8225 2023-05-15T17:59:40+02:00 Marine subsidies in freshwater: Effects of salmon carcasses on lipid class and fatty acid composition of juvenile coho salmon Ron A Heintz Bonita D Nelson John Hudson AND Marie Larsen Larry Holland Mark Wipfli The Pennsylvania State University CiteSeerX Archives 2004 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1072.8225 http://www.iab.uaf.edu/people/mark_wipfli/pubs/2004_Heintz_etal_TAFS.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1072.8225 http://www.iab.uaf.edu/people/mark_wipfli/pubs/2004_Heintz_etal_TAFS.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.iab.uaf.edu/people/mark_wipfli/pubs/2004_Heintz_etal_TAFS.pdf text 2004 ftciteseerx 2020-04-26T00:24:52Z Abstract.-Returning adult salmon represent an important source of energy, nutrients, and biochemicals to their natal streams and may therefore have a quantitative effect on the energy levels of stream-resident salmonids. We tested this hypothesis by constructing simulated streams for coho salmon Oncorhynchus kisutch to which we added 0, 1, and 4 carcasses/m 2 (0, 0.71, and 2.85 kg wet mass/m 2 ) of pink salmon O. gorbuscha. After 60 d we evaluated the lipid class and fatty acid composition of rearing coho salmon from the simulated streams; the lipid content and triacylglycerols of the coho salmon increased with increasing carcass density whereas phospholipids decreased. Increased amounts of triacylglycerols accounted for most of the lipid increase. In addition to increasing in concentration, the fatty acid composition of the triacylglycerols also changed with carcass density. Triacylglycerols of juvenile coho salmon from the control streams had significantly higher omega-3 : omega-6 ratios as a result of fivefold and sixfold increases in the concentrations of eicosapentanoic and docosahexanoic fatty acids, respectively. These data demonstrate an immediate nutritional benefit resulting from the introduction of salmon carcasses in juvenile coho salmon rearing habitat and indicate the utility of fatty acid and lipid class analysis for examining the effects of marine-derived nutrients on juvenile salmonids. Text Pink salmon Unknown |
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Abstract.-Returning adult salmon represent an important source of energy, nutrients, and biochemicals to their natal streams and may therefore have a quantitative effect on the energy levels of stream-resident salmonids. We tested this hypothesis by constructing simulated streams for coho salmon Oncorhynchus kisutch to which we added 0, 1, and 4 carcasses/m 2 (0, 0.71, and 2.85 kg wet mass/m 2 ) of pink salmon O. gorbuscha. After 60 d we evaluated the lipid class and fatty acid composition of rearing coho salmon from the simulated streams; the lipid content and triacylglycerols of the coho salmon increased with increasing carcass density whereas phospholipids decreased. Increased amounts of triacylglycerols accounted for most of the lipid increase. In addition to increasing in concentration, the fatty acid composition of the triacylglycerols also changed with carcass density. Triacylglycerols of juvenile coho salmon from the control streams had significantly higher omega-3 : omega-6 ratios as a result of fivefold and sixfold increases in the concentrations of eicosapentanoic and docosahexanoic fatty acids, respectively. These data demonstrate an immediate nutritional benefit resulting from the introduction of salmon carcasses in juvenile coho salmon rearing habitat and indicate the utility of fatty acid and lipid class analysis for examining the effects of marine-derived nutrients on juvenile salmonids. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Ron A Heintz Bonita D Nelson John Hudson AND Marie Larsen Larry Holland Mark Wipfli |
spellingShingle |
Ron A Heintz Bonita D Nelson John Hudson AND Marie Larsen Larry Holland Mark Wipfli Marine subsidies in freshwater: Effects of salmon carcasses on lipid class and fatty acid composition of juvenile coho salmon |
author_facet |
Ron A Heintz Bonita D Nelson John Hudson AND Marie Larsen Larry Holland Mark Wipfli |
author_sort |
Ron A Heintz |
title |
Marine subsidies in freshwater: Effects of salmon carcasses on lipid class and fatty acid composition of juvenile coho salmon |
title_short |
Marine subsidies in freshwater: Effects of salmon carcasses on lipid class and fatty acid composition of juvenile coho salmon |
title_full |
Marine subsidies in freshwater: Effects of salmon carcasses on lipid class and fatty acid composition of juvenile coho salmon |
title_fullStr |
Marine subsidies in freshwater: Effects of salmon carcasses on lipid class and fatty acid composition of juvenile coho salmon |
title_full_unstemmed |
Marine subsidies in freshwater: Effects of salmon carcasses on lipid class and fatty acid composition of juvenile coho salmon |
title_sort |
marine subsidies in freshwater: effects of salmon carcasses on lipid class and fatty acid composition of juvenile coho salmon |
publishDate |
2004 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1072.8225 http://www.iab.uaf.edu/people/mark_wipfli/pubs/2004_Heintz_etal_TAFS.pdf |
genre |
Pink salmon |
genre_facet |
Pink salmon |
op_source |
http://www.iab.uaf.edu/people/mark_wipfli/pubs/2004_Heintz_etal_TAFS.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1072.8225 http://www.iab.uaf.edu/people/mark_wipfli/pubs/2004_Heintz_etal_TAFS.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766168517417107456 |