1. Distribution and early life-history characteristics of anguillid leptocephali in the western South Pacific
- Author
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D. J. Jellyman, Shun Watanabe, Mari Kuroki, Eric Feunteun, Katsumi Tsukamoto, Akira Shinoda, Jun Aoyama, Michael J. Miller, Biologie des organismes marins et écosystèmes (BOME), Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN), and Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
larval migration ,0106 biological sciences ,010504 meteorology & atmospheric sciences ,otolith microstructure ,freshwater eel ,Anguilla obscura ,Aquatic Science ,Oceanography ,01 natural sciences ,medicine ,14. Life underwater ,Mollusca ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences ,Otolith ,[SDV.EE]Life Sciences [q-bio]/Ecology, environment ,Ecology ,biology ,010604 marine biology & hydrobiology ,biology.organism_classification ,Myomere ,Phylogeography ,medicine.anatomical_structure ,Anguilla australis ,Anguilla reinhardtii ,Anguilla megastoma - Abstract
International audience; Freshwater eels are important fisheries species in parts of the western South Pacific, but little is known about their oceanic early life history or spawning areas. The age, growth, morphology and geographic distribution of five species of genetically identified anguillid leptocephali collected in 1995, 2000 and 2005 were compared. The sizes and ages of the leptocephali collected, Anguilla australis (n = 18), Anguilla marmorata (n = 15), Anguilla reinhardtii (n = 12), Anguilla megastoma (n = 2) and Anguilla obscura (n = 1), ranged from 19.0 to 50.9 mm and from 25 to 155 days, respectively. Leptocephali were mostly collected in the South Equatorial Current region. The total myomere ranges overlapped among species, but anodorsal myomere numbers clearly divided shortfinned and longfinned eels. The myomere ranges of the leptocephali were similar to the reported ranges of the numbers of vertebrae in adults. Larval growth rates suggested that the temperate species A. australis had slightly slower growth than the tropical species A. reinhardtii. The present study suggests that both temperate and tropical anguillid eels use the South Equatorial Current region for spawning and larval development, although some species might have different early life parameters and migration routes to their recruitment areas
- Published
- 2008
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