SEXUAL DIMORPHISM IN THE DORSAL FIN OF PACIFIC WHITE-SIDED DOLPHINS (LAGENORHYNCHUS OBLIQUIDENS) FROM COASTAL WATERS OFF JAPAN

Etsuko Katsumata; Saeko Naruse; Toru Hosono; Hiroshi Katsumata

doi:10.34331/cpops.2020S005

この記事には本公開記事があります。本公開記事を参照してください。
引用する場合も本公開記事を引用してください。

SEXUAL DIMORPHISM IN THE DORSAL FIN OF PACIFIC WHITE-SIDED DOLPHINS (LAGENORHYNCHUS OBLIQUIDENS) FROM COASTAL WATERS OFF JAPAN

Etsuko Katsumata , Saeko Naruse, Toru Hosono, Hiroshi Katsumata

著者情報

キーワード: allometry, dorsal fin, growth, morphology, Pacific white-sided dolphin

ジャーナルフリー早期公開

論文ID: 2020S005

DOI https://doi.org/10.34331/cpops.2020S005

この記事には本公開記事があります。

The final version of this article is now available: Vol. 3 (2021) pp. 273-280

詳細

抄録

Records of external measurements of 35 male and 40 female Pacific white-sided dolphins collected from 1970 to 2020 were examined for the shape change of the dorsal fin and the difference between males and females. For mature individuals based on a body length of 200 cm, which is an approximate guideline for maturity, a significant difference was detected in the ratios of the front edge length and the tip height which were 3.8 on average with a maximum value of 5.6 in males, and 2.8 (average) and 3.1 (maximum value) in females, respectively. It was concluded that sexually mature males could be distinguished by measuring the shape of the dorsal fin.

責任著者(Corresponding author)

J-STAGEへの登録はこちら（無料）