Diets and body condition of polar cod (Boreogadus saida) in the northern Bering Sea and Chukchi Sea

Nakano, Tsubasa; Matsuno, Kohei; Nishizawa, Bungo; Iwahara, Yuka; Mitani, Yoko; Yamamoto, Jun; Sakurai, Yasunori; Watanuki, Yutaka

Diets and body condition of polar cod (Boreogadus saida) in the northern Bering Sea and Chukchi Sea

Nakano, Tsubasa; Matsuno, Kohei; Nishizawa, Bungo et al.

Polar biology, 2016, 39(6), 1081-1086

Permalink : https://hdl.handle.net/2115/65797

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アクセス権	open access
URI	https://hdl.handle.net/2115/65797
タイトル	Diets and body condition of polar cod (Boreogadus saida) in the northern Bering Sea and Chukchi Sea
著者	Nakano, Tsubasa ; Matsuno, Kohei ; Nishizawa, Bungo ; Iwahara, Yuka ; Mitani, Yoko ; Yamamoto, Jun ; Sakurai, Yasunori ; Watanuki, Yutaka
著者名 Nakano, Tsubasa
e-Rad_Researcher 90712159 著者名 Matsuno, Kohei
著者名 Nishizawa, Bungo
著者名 Iwahara, Yuka
e-Rad_Researcher 40538279 著者名 Mitani, Yoko
e-Rad_Researcher 10292004 著者名 Yamamoto, Jun
e-Rad_Researcher 30196133 著者名 Sakurai, Yasunori
e-Rad_Researcher 40192819 著者名 Watanuki, Yutaka
言語	英語
キーワード	Gelatinous zooplankton
	Lipid content
	Prey availability
	Regional differences
	Stomach fullness
発行日	2016-06
出版者	Springer
収録物名	Polar biology
巻(号)	39(6)
ページ	1081-1086
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	The final publication is available at link.springer.com
PISSN	0722-4060
EISSN	1432-2056
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1007/s00300-015-1769-x