To examine the validity of the subspecies of Anguilla nebulosa, A. bicolor and A. australis, variations in morphological and molecular genetic characters were compared between geographically separate samples of these three species with reference to populations of A. marmorata and the 11 other species of Anguilla. There were statistically significant differences in the total number of vertebrae between the subspecies of each of the three species. The genetic distances (0.003.0.007) of the mitochondrial 16S ribosomal RNA gene between each of the subspecies pairs of A. nebulosa, A. bicolor and A. australis were smaller than those of any combinations of all anguillid species (0.012.0.057). The genetic distance between the A. australis subspecies was smallest (0.003) among the three species, and those between the two subspecies of both A. bicolor (0.007) and A. nebulosa (0.006) were larger than those among populations of A. marmorata (0.0.003). Morphological and molecular genetic variations between each of the three subspecies pairs and among the populations of A. marmorata were much less than those at the species level. This study is a first step towards evaluating the subspecies issues of the genus Anguilla, but more studies on the population structure, spawning areas and migration routes of all species are needed to fully understand the taxonomic status within the genus Anguilla.
雑誌名
Coastal marine science
巻
32
号
1
ページ
19 - 29
発行年
2008-08-20
ISSN
13493000
書誌レコードID
AA11957899
フォーマット
application/pdf
日本十進分類法
452
出版者
International Coastal Research Center, Ocean Research Institute, the University of Tokyo
The use of morphological and molecular genetic variations to evaluate subspecies issues in the genus Anguilla
CMS320103.pdf
(519.08KB)
