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タイトル: Early life history of the Luzon mottled eel Anguilla luzonensis recruited to the Cagayan River, Luzon Island, the Philippines
著者: Shinoda, Akira
Yoshinaga, Tatsuki
Aoyama, Jun
Tsuchida, Go
Nakazato, Sho
Ishikawa, Mina
Matsugamoto, Yoshifumi
Watanabe, Shun
Azanza, Rhodora V.
Tsukamoto, Katsumi
キーワード: Anguilla luzonensis
Cagayan River
Luzon Island
Luzon mottled eel
the Philippines
glass eel
otolith microstructure
発行日: 2015年7月
出版者: International Coastal Research Center, Atmosphere and Ocean Research Institute, the University of Tokyo
掲載誌情報: Coastal marine science. Vol. 38, No. 1, 2015, pp. 21-26
抄録: The recently discovered freshwater eel species of the Luzon mottled eel, Anguilla luzonensis, has only been found in very limited area at the tip of the Northern Philippines. Here we investigated the early life history of A. luzonensis for the first time to help understand its larval dispersal pattern in the western North Pacific, and compared it to A. celebesensis and data from previous studies. Genetically-identified glass eels of A. luzonensis collected from the northern Luzon Island in January and February 2009 (n=3 and 8, respectively) were used to study the age of recruitment of this species using otolith microstructure. The leptocephalus stage was 129.6±10.7 days (mean±s. d.; range, 113 to 146), followed by 18.4±3.7 days (13 to 25) at the metamorphosing and 17.6±5.1 days (7 to 23) at the glass eel stages. These specimens were found to be hatched between August and September 2008. A previous study on a small number of the leptocephali of A. luzonensis collected offshore reported that the hatching dates were between February and March, and thus the spawning season of A. luzonensis is suggested to span at least a half of a year.
URI: http://hdl.handle.net/2261/57166
ISSN: 13493000
出現カテゴリ:Coastal Marine Science
Coastal Marine Science


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