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Ichthyological Research

, Volume 50, Issue 4, pp 387–390 | Cite as

Intensive cannibalism and feeding on bregmacerotids in Champsodon snyderi (Champsodontidae): evidence for pelagic predation

  • Yuji Morohoshi
  • Kunio Sasaki
Article

Abstract

Analysis of the stomach contents of 1002 specimens of Champsodon snyderi (Champsodontidae) (17.3–91.2 mm SL) from Tosa Bay, southern Japan, showed that species to primarily feed on crustaceans and fishes (87.9% by frequency, 37.6% by weight for the former; 17.3% and 60.7% for the latter, respectively), although fishes occurred more often in stomachs of individuals larger than 50 mm SL. Champsodon snyderi ingested large prey fishes (60.5–101.0% of predator SL), the maximum weight recorded for a single ingested specimen being 50.9% of the predator weight. Mesopelagic Bregmaceros nectabanus were by far the dominant prey fish, followed by C. snyderi (cannibalism), indicating that C. snyderi leaves the bottom to feed in the pelagic environment during the night.

Key words

Champsodon snyderi Bregmacerotidae Food habits Cannibalism Vertical migration 

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Copyright information

© Springer-Verlag Tokyo 2003

Authors and Affiliations

  1. 1.Laboratory of Marine Biology, Faculty of ScienceKochi UniversityKochiJapan

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