Bulletin of the Hiroshima University Museum Issue 11
2019-12-25 発行

瀬戸内海西部,山陽小野田市周辺海域におけるナルトビエイAetobatus narutobieiの年齢と成長について

Age and growth of the Naru eagle ray, Aetobatus narutobiei, off Sanyo-Onoda City, in the western Seto Inland Sea
Shimamoto, Aya
Hijiya, Akiko
Minpo, Saki
Yamasaki, Hiromi
Wanishi, Akihito
Hashimoto, Hiroaki
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abstract
Since the beginning of the 21st century, the Naru eagle ray, Aetobatus narutobiei, has distributed in the Ariake Sound and the western Seto Inland Sea. Bivalve populations in both sea areas have decreased sharply as a result of predation by the eagle ray. We conducted ecological study on this eagle ray in the western Seto Inland Sea from 2004 to 2013. In this paper age and growth of the Naru eagle ray in the western Seto Inland Sea was reported. Comparing our results with data on the growth patterns in the Ariake population, it seems that both eagle ray subpopulations of the Ariake Sound and the western Seto Inland Sea are separating biologically together.
subject
ナルトビエイ
年齢・成長
Bertalanffy の成長式
系統群
Naru eagle ray
Aetobatus narutobiei
Age and growth
von Bertalanffy growth equation
Subpopulation
rights
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