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Diet of Mass-Stranded Striped Dolphins (Stenella coeruleoalba) in Southern Japan (East China Sea)

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Title: Diet of Mass-Stranded Striped Dolphins (Stenella coeruleoalba) in Southern Japan (East China Sea)
Authors: Matsuda, Ayaka Browse this author
Yamada, Tadasu K. Browse this author →KAKEN DB
Tajima, Yuko Browse this author →KAKEN DB
Kunisue, Tatsuya Browse this author →KAKEN DB
Amano, Masao Browse this author →KAKEN DB
Matsuishi, Takashi F. Browse this author →KAKEN DB
Keywords: cetacean ecology
stable isotopes
stomach contents
Issue Date: Jan-2021
Publisher: BioOne
Journal Title: Mammal Study
Volume: 46
Issue: 1
Start Page: 17
End Page: 24
Publisher DOI: 10.3106/ms2020-0005
Abstract: Striped dolphins (Stenella coeruleoalba) mass-stranded on 26 April 2013 at Minamisatsuma, Kagoshima Prefecture, in southern Japan (East China Sea). The diet of the mass-stranded striped dolphins was investigated to reveal their foraging pattern through analyses of the stomach contents and stable isotopes in muscle. Of 26 stomachs sampled, 25 contained hard parts of prey animals; no fleshy remains were found in any of the stomachs. The identified prey species represented four cephalopod families: Loliginidae, Onychoteuthidae, Histioteuthidae, and Ommastrephidae. Among these, ommastrephids had the highest abundance (42.4%) and frequency of occurrence (69.2%). A chi-square test revealed that the prey species consumed did not significantly differ between male and female dolphins, although deeper-water squids (Onychoteuthidae and Histioteuthidae) appeared only in the stomachs of females. The values of δ13C ranged from –20.4 to –17.0‰ (mean ± SD: –18.2 ± 0.9‰), and values of δ15N ranged from 10.2 to 12.5‰ (10.8 ± 0.5‰), with a significant difference in δ15N between sexes (P < 0.05).
Rights: This is a post-peer-review, pre-copyedit version of an article published in Mammal Study. The final authenticated version is available online at:
Type: article (author version)
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 松石 隆

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