银化期印度洋-太平洋鳗鲡雄性个体的形态学和性腺组织学特征。

Morphological and gonadal histological characteristics of the silver-phase male Indo-Pacific eel Anguilla marmorata.

机构信息

Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan.

出版信息

J Fish Biol. 2022 Sep;101(3):749-752. doi: 10.1111/jfb.15139. Epub 2022 Jul 9.

Abstract

Eight silver-phase male Indo-Pacific eels (giant mottled eels) Anguilla marmorata were collected from three small rivers on subtropical Amami-Oshima Island, Japan, and their morphological and gonadal-histological characteristics were examined. The total length, body mass and age of the silver eels were 543.8 ± 49.3 (496-659) mm, 376.0 ± 116.0 (282-660) g and 14.6 ± 2.3 (11-19) years old, respectively. The silvering-related characteristics (eye index, pectoral-fin index, gut-somatic index) and reproductive characteristics (gonadosomatic index, histological stage) of the silver eels were significantly advanced compared to those of yellow eels, which is similar to other anguillid species.

摘要

从日本亚热带奄美大岛的 3 条小河中采集了 8 条银色阶段的雄性印度洋-太平洋鳗（大斑鳗） Anguilla marmorata，并检查了它们的形态和性腺组织学特征。银鳗的全长、体重和年龄分别为 543.8 ± 49.3（496-659）mm、376.0 ± 116.0（282-660）g 和 14.6 ± 2.3（11-19）岁。与黄鳗相比，银鳗的银色相关特征（眼指数、胸鳍指数、肠道体指数）和生殖特征（性腺体指数、组织学阶段）明显更为先进，这与其他鳗鲡科物种相似。