Physical and biochemical properties of the euphausiids Thysanoessa inermis, Thysanoessa raschii, and Thysanoessa longipes in the eastern Bering Sea

Euphausiids are an integral part of the Bering Sea ecosystem, linking primary production to upper level trophic levels as both consumers and prey. Species native to this region extend over a range of geographic provinces and serve as a critical component of the movement of energy through the food we...

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Published in:Deep-sea research. Part II, Topical studies in oceanography Topical studies in oceanography, 2012-06, Vol.65-70, p.173-183
Main Authors: Harvey, H. Rodger, Pleuthner, Rachel L., Lessard, Evelyn J., Bernhardt, Megan J., Tracy Shaw, C.
Format: Article
Language:English
Subjects:
Bering Sea
Budgeting
Carbon
Deep sea
Drying
Energy content
Euphausiid
Krill
Length–weight
Lipid
Lipids
Marine
Mathematical models
Oceanography
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container_title Deep-sea research. Part II, Topical studies in oceanography
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creator Harvey, H. Rodger
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description Euphausiids are an integral part of the Bering Sea ecosystem, linking primary production to upper level trophic levels as both consumers and prey. Species native to this region extend over a range of geographic provinces and serve as a critical component of the movement of energy through the food web. As one facet of the BEST-BSIERP Bering Sea program, we determined the proximate composition and essential allometric relationships of multiple species of euphausiids collected over three years in the eastern Bering Sea. Three euphausiid species were examined: Thysanoessa inermis, Thysanoessa raschii, and Thysanoessa longipes. While the three species were similar with respect to size, T. inermis had the highest average wet and dry weights per size class, as well as highest carbon and caloric concentrations. Among the three species, T. inermis and T. longipes had similar lipid concentrations, with T. longipes showing higher average lipid concentrations. Empirical equations were developed to describe fundamental relationships between length, weight, PC/PN, and calorie and lipid content for the three species over the full range of sizes encountered in the study area. Such relationships increase our understanding of how euphausiids contribute to the carbon budget and energy input in the eastern Bering Sea system and help to define realistic parameters for ongoing and future modeling efforts.
doi_str_mv 10.1016/j.dsr2.2012.02.007
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identifier ISSN: 0967-0645
ispartof Deep-sea research. Part II, Topical studies in oceanography, 2012-06, Vol.65-70, p.173-183
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1879-0100
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source ScienceDirect Freedom Collection
subjects Bering Sea
Budgeting
Carbon
Deep sea
Drying
Energy content
Euphausiid
Krill
Length–weight
Lipid
Lipids
Marine
Mathematical models
Oceanography
title Physical and biochemical properties of the euphausiids Thysanoessa inermis, Thysanoessa raschii, and Thysanoessa longipes in the eastern Bering Sea
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