| Title |
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en
Diets and body condition of polar cod (Boreogadus saida) in the northern Bering Sea and Chukchi Sea
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| Creator |
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| Accessrights |
open access |
| Rights |
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en
The final publication is available at link.springer.com
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| Subject |
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Other
en
Gelatinous zooplankton
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Other
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Lipid content
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Other
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Prey availability
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Other
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Regional differences
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Other
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Stomach fullness
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NDC
660
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| Description |
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Abstract
en
To understand trophic responses of polar cod Boreogadus saida (a key species in Arctic food webs) to changes in zooplankton and benthic invertebrate communities (prey), we compared its stomach contents and body condition between three regions with different environments: the northern Bering Sea (NB), southern Chukchi Sea (SC), and central Chukchi Sea (CC). Polar cod were sampled using a bottom trawl, and their potential prey species in the environment were sampled using a plankton net and a surface sediment sampler. Polar cod fed mainly on appendicularians in the NB and SC where copepods were the most abundant in the environment, while they fed on copepods, euphausiids, and gammarids in the CC where barnacle larvae were the most abundant species in plankton samples on average. The stomach fullness index of polar cod was higher in the NB and SC than CC, while their body condition index did not differ between these regions. The lower lipid content of appendicularians compared to other prey species is the most plausible explanation for this inconsistency.
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| Publisher |
en
Springer
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| Date |
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| Language |
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| Resource Type |
journal article |
| Version Type |
AM |
| Identifier |
HDL
http://hdl.handle.net/2115/65797
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| Relation |
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isVersionOf
DOI
https://doi.org/10.1007/s00300-015-1769-x
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| Journal |
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PISSN
0722-4060
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EISSN
1432-2056
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en
Polar biology
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Volume Number39
Issue Number6
Page Start1081
Page End1086
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| File |
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| Oaidate |
2023-07-26 |
