Department of Biology, Tokyo Medical University
School of Marine Biosciences, Kitasato University
Atmosphere and Ocean Research Institute, The University of Tokyo
The Marine Science Institute, University of the Philippines
Present address: College of Bioresource Sciences, Nihon University
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.
雑誌名
Coastal marine science
巻
38
号
1
ページ
21 - 26
発行年
2015-07
ISSN
13493000
書誌レコードID
AA11957899
出版者
International Coastal Research Center, Atmosphere and Ocean Research Institute, the University of Tokyo
Early life history of the Luzon mottled eel Anguilla luzonensis recruited to the Cagayan River, Luzon Island, the Philippines
CMS380104.pdf
(501.78KB)
