Selection of food sources by Ruditapes philippinarum and Mactra veneriformis (Bivalva: Mollusca) determined from stable isotope analysis

• KASAI AKIHIDE

  Graduate school of Agriculture, Kyoto University

• HORIE HISAKO

  Graduate school of Agriculture, Kyoto University

• SAKAMOTO WATARU

  Graduate school of Agriculture, Kyoto University Kinki University, Fisheries Institute

Bibliographic Information

Other Title

• Selection of food sources by <italic>Ruditapes philippinarum</italic> and <italic>Mactra veneriformis</italic> (Bivalva: Mollusca) determined from stable isotope analysis
• Selection of food sources by Raditapes philippinarum and Mactra veneriformis (Bivalve: Mollusca) determined from stable isotope analysis

Abstract

Carbon and nitrogen isotopic ratios in the body of the bivalves Ruditapes philippinarum and Mactra veneriformis were measured to estimate the role of the bivalves in the ecosystem in an estuary. The isotopic signatures were compared with those obtained from particulate organic matter (POM) in the middle reach of the river, in the estuary, and off the estuary. Both the bivalves showed constant δ¹³C and δ¹⁵N values of approximately -17‰ and 10‰ that were significantly enriched compared with those for POM in the habitat (-25‰ and 4‰). The relative contributions of terrestrial organic matter to the POM in the habitat and to the bivalve diet were estimated: the former was approximately 90% while the latter approximately 10%. This indicates that the bivalves select marine POM from the organic matter available in their habitat, and play a minor role in the direct removal of terrestrial particulate matter. Temporal changes in δ¹³C and δ¹⁵N for both bivalves were small, but a distinct decrease in δ¹³C was observed following a period of heavy rain. During rainfall the concentration of terrestrial material increased in the habitat, and the bivalves would then have to change their food sources temporarily.

Journal

• Fisheries science

  Fisheries science 70 (1), 11-20, 2004

  The Japanese Society of Fisheries Science

Keywords

• bivalve
• ecosystem
• food source
• Mactra veneriformis
• particulate organic matter
• Ruditapes philippinarum
• stable isotope

Details

• CRID: 1390282679404662144
• NII Article ID: 130003742926
• NII Article ID: 10012490382
• NII Book ID: AA10993718
• DOI: 10.1111/j.1444-2906.2003.00764.x
• COI: 1:CAS:528:DC%2BD2cXhvFOltbs%3D
• ISSN: 14442906
• ISSN: 09199268
• NDL BIB ID: 6860930
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6860930
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed