Evidence of a spawning area of Anguilla marmorata in the western North Pacific

M. J. Miller, Noritaka Mochioka, T. Otake, K. Tsukamoto

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Leptocephali of the tropical eel Anguilla marmorata have been consistently collected in the same area of the North Equatorial Current (NEC) in the western North Pacific during three consecutive cruises in June and July of 1991 (N=28) and 1994 (N=20), and July and September of 1995 (N = 27), indicating that this is a spawning area of this species. These leptocephali were collected from 130°E to 142°E and 12°N to 20°N, to the west of the Mariana Islands, in 20 tows in 1991, in 13 tows in 1994 and in 17 tows in 1995, indicating a widespread presence, but a relatively low abundance. Six of these specimens (16.3-36.0 mm total length) from the 1995 cruise, which were of the typical size range of these leptocephali, were genetically confirmed to be A. marmorata in a previous study. The consistent presence of recently spawned A. marmorata leptocephali (9-20 mm) in all 3 years, suggests that the western region of the NEC is the spawning area of the northern population of A. marmorata that was identified in a recent population genetics study. These leptocephali would thus be transported westward by the NEC and then transported north into the Kuroshio Current and toward Taiwan and Japan, or south toward the southern Philippines and into the Celebes Sea by the Mindanao Current. Available evidence indicates that A. marmorata may have potentially year-round spawning, and the presence of a spawning area of this species in the same region as that of Anguilla japonica suggests that the northern population of A. marmorata has evolved a spawning migration from East Asia, the Philippines and the Celebes Sea region to the NEC area, but differs from A. japonica by having some individuals that recruit to more southern areas.

Original languageEnglish
Pages (from-to)809-814
Number of pages6
JournalMarine Biology
Volume140
Issue number4
DOIs
Publication statusPublished - Dec 1 2002

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spawning
Anguilla japonica
Philippines
Indonesia
Mariana Islands
eel
range size
population genetics
East Asia
Anguilla marmorata
Taiwan
Japan
sea

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

Cite this

Evidence of a spawning area of Anguilla marmorata in the western North Pacific. / Miller, M. J.; Mochioka, Noritaka; Otake, T.; Tsukamoto, K.

In: Marine Biology, Vol. 140, No. 4, 01.12.2002, p. 809-814.

Research output: Contribution to journalArticle

Miller, M. J. ; Mochioka, Noritaka ; Otake, T. ; Tsukamoto, K. / Evidence of a spawning area of Anguilla marmorata in the western North Pacific. In: Marine Biology. 2002 ; Vol. 140, No. 4. pp. 809-814.
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