Reproduction and food habits of two species of sawtail catsharks, Galeus eastmani and G. nipponensis, in Suruga Bay, Japan.

• HORIE TAKU

  School of Marine Science and Technology, Tokai University

• TANAKA SHO

  School of Marine Science and Technology, Tokai University

Abstract

This study provides information on reproduction and food habits of Galeus eastmani and G. nipponensis in the east and west of Suruga Bay. A total of 731 G. eastmani and 754 G. nipponensis were sampled by commercial bottom trawlers in 1981-1989 and 1992-1996. Size at sexual maturity of both species of Galeus differed between the former and latter period. In G. eastmani, maturity size of females from the east tended to be smaller than those from the west. Both species laid large yolky ova the year round. Both species preyed on a wide variety of marine organisms, mainly Osteichthyes, Cephalopoda and Crustacea. Foods of G. eastmani differed between the east and west by season. Foods in the young stage of G. nipponensis differed from those of immature and mature by season. Body size of the young G. nipponensis was similar for mature G. eastmani, however the young fed on different organisms from G. eastmani in the east. Both species were voracious and opportunistic feeders.

Journal

• Fisheries science

  Fisheries science 66 (5), 812-825, 2000

  The Japanese Society of Fisheries Science

Keywords

• food habits
• Galeus eastmani
• Galeus nipponensis
• reproduction
• Suruga Bay

Details

• CRID: 1390001204429515904
• NII Article ID: 130003903507
• NII Article ID: 10004859892
• NII Book ID: AA10993718
• DOI: 10.1046/j.1444-2906.2000.00133.x
• ISSN: 14442906
• ISSN: 09199268
• NDL BIB ID: 5545106
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5545106
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed