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Environmental Biology of Fishes

, Volume 80, Issue 4, pp 445–452 | Cite as

Distribution of leptocephali of the freshwater eels, genus Anguilla, in the waters off west Sumatra in the Indian Ocean

  • Jun Aoyama
  • Sam Wouthuyzen
  • Michael J. Miller
  • Yuki Minegishi
  • Mari Kuroki
  • Sasanti R. Suharti
  • Tatsuya Kawakami
  • Krunaen O. Sumardiharga
  • Katsumi Tsukamoto
Original Paper

Abstract

A research cruise was conducted in the eastern Indian Ocean off west Sumatra, Indonesia, in June 2003 to learn about the spawning and larval ecology of the tropical freshwater eels of the genus Anguilla in the region. A total of 43 anguillid leptocephali were collected during the cruise and they were genetically identified as 41 Anguilla bicolor bicolor, 1 Anguilla marmorata, and 1 Anguilla interioris. A. bicolor bicolor leptocephali were 44.1–55.5 mm TL and most of them were at the fully grown stage. Reexamination of the historical data of Jespersen (1942) also suggested a relatively low abundance of small size leptocephali (<40 mm) of this species off west Sumatra. Although the study area has long been considered to be a spawning site of A. bicolor bicolor, the distributions of leptocephali from the two surveys and the patterns of ocean currents in the region suggest the possibility that the main spawning area of this species is located farther offshore.

Keywords

Freshwater eels Indian Ocean Larval migration Distribution Spawning area 

Notes

Acknowledgments

We sincerely thank the captain, crew, and technicians of the R/V Baruna Jaya VII for their assistance during the research cruise. This work was supported in part by Grants-in-Aid numbers 1299346 and 12NP0201 from the Ministry of Education, Science, Sports, and Culture, Japan. KT was supported by the Research Foundation “Touwa Shokuhin Shinkoukai” and the Eel Research Foundation “Noborikai.”

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Jun Aoyama
    • 1
  • Sam Wouthuyzen
    • 2
  • Michael J. Miller
    • 1
  • Yuki Minegishi
    • 1
  • Mari Kuroki
    • 1
  • Sasanti R. Suharti
    • 2
  • Tatsuya Kawakami
    • 1
  • Krunaen O. Sumardiharga
    • 2
  • Katsumi Tsukamoto
    • 1
  1. 1.Ocean Research InstituteThe University of TokyoNakanoJapan
  2. 2.Research Center for OceanographyIndonesian Institute of SciencesAncol TimurIndonesia

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