論文

査読有り 筆頭著者 責任著者
2017年2月

Molecular-based diet analysis of the early post-larvae of Japanese sardine Sardinops melanostictus and Pacific round herring Etrumeus teres

MARINE ECOLOGY PROGRESS SERIES
  • Junya Hirai
  • ,
  • Kiyotaka Hidaka
  • ,
  • Satoshi Nagai
  • ,
  • Tadafumi Ichikawa

564
開始ページ
99
終了ページ
113
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3354/meps12008
出版者・発行元
INTER-RESEARCH

Successful feeding on preferred prey could be important for the survival of fish larvae. However, high taxonomic resolution of prey types from damaged gut contents is difficult to achieve through morphological classification, especially for fragile organisms or immature stages. In this study, <10 mm early post-larvae of Japanese sardine Sardinops melanostictus and Pacific round herring Etrumeus teres were collected from Tosa Bay (Japan) during their main spawning periods. Diet and plankton communities present in the environment were investigated using molecular operational taxonomic units (MOTUs) clustered using eukaryotic metagenetic data from the 18S V9 region. There were no clear differences in the diets of the co-existing fish species. Fragile protists and gelatinous metazoans occasionally represented large proportions of gut content; however, copepods comprised the majority of the prey items. Among the copepods, the Calanidae MOTU derived from the large copepod Calanus sinicus was most consumed, followed by the Paracalanidae MOTU identified as small Paracalanus parvus s.l. The C. sinicus MOTU largely dominated inter mediate (0.5-1.0 mm) and large (1.0-2.0 mm) environmental mesoplankton communities, whereas the P. parvus s.l. MOTU was the most dominant in small-sized (0.1-0.5 mm) communities. Early post-larvae fish were considered to prefer eggs or nauplii of C. sinicus, which was the second-dominant MOTU in small-sized communities. These results suggested that both food availability and developmental stages of copepods determined prey preference.

Web of Science ® 被引用回数 : 19

リンク情報
DOI
https://doi.org/10.3354/meps12008
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000400661400009&DestApp=WOS_CPL
ID情報
  • DOI : 10.3354/meps12008
  • ISSN : 0171-8630
  • eISSN : 1616-1599
  • Web of Science ID : WOS:000400661400009

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