Monogamous mating system and sexuality in the gobiid fish, Trimma marinae (Actinopterygii: Gobiidae)
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- 作者：Kazuya Fukuda ; Hisaya Manabe ; Makoto Sakurai ; Shin-ichi Dewa…
- 关键词：Juvenile hermaphroditism ; Monogamy ; Mate guarding ; Sex change ; Gonochorism
- 刊名：Journal of Ethology
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：35
- 期：1
- 页码：121-130
- 全文大小：
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Zoology; Behavioral Sciences; Animal Ecology; Evolutionary Biology;
- 出版者：Springer Japan
- ISSN：1439-5444
- 卷排序：35
文摘
The mating system and sexuality of the gobiid fish Trimma marinae were investigated in aquaria and by gonadal histological examination. The male to female sex ratio in the study aggregation was female biased (14:27), and females were larger than males. T. marinae were monogamous because they established continuous pairs and spawned repeatedly with the same individuals. Observations of aggressive behavior suggested that the monogamous mating system resulted from female mate guarding. We also performed a rearing experiment to test whether sex change occurs in this species. None of the males or females reared separately in aquaria for 63 days changed sex. Additionally, gonadal histology revealed that mature fish had unisexual gonads (testis or ovary). These results strongly suggest that T. marinae is gonochoristic. However, immature fish had a bisexual gonadal structure, indicating juvenile hermaphroditism.