1 0 0 0 IR 日本産トビウオ類の特徴と検索 : I.成魚の特徴 : II.稚魚期の特徴
- 著者
- 今井 貞彦
- 出版者
- 鹿児島大学
- 雑誌
- 鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University (ISSN:0453087X)
- 巻号頁・発行日
- no.5, pp.91-102,
The author has obtained numerous specimens of the flying-fishes involving the adult and juveniles of twenty species mainly from Kyfishil and its adjacent waters. The keys and main characteristics for the determination of the species of these Japanese flying-fishes are provided here. As the characteristics of flying-fishes greatly transform according to their growth, the keys to the species ought to be given for each stage of their life-history. In the present paper, Part I deals with the adult, and Part II with the young of these Japanese flying-fishes. Keys for the larva and immature fishes of them will be provided on the next parts III and IV.
1 0 0 0 OA オヤニラミ仔稚魚の成長に伴う闘争行動の発達
- 著者
- 立原 一憲 四宮 明彦 木村 清朗 今井 貞彦
- 出版者
- 日本生態学会
- 雑誌
- 日本生態学会誌 (ISSN:00215007)
- 巻号頁・発行日
- vol.38, no.2, pp.159-167, 1988-08-31
Observations on the development of aggressive behavior of Japanese perch, Coreoperca kawamebari, were made over a 1-year period. Newly hatched larvae aggregated at the water surface and showed no aggressive behavior. Several days after yolk sac absorption, larvae dispersed from the water surface to the substrate and began to feed and fight. Chasing and lateral displays as seen in adult fish were firstly observed at this time, and a dominance hierarchy was evident at 50 days after hatching. Dominant individuals formed their territories after 50 days and gradually enlarged them as body size increased. The behavioral ontogeny of this fish is divisible into four phases, i. e. aggregation, dispersion, developing of aggressive behavior and territorial phases, and these correspond with four different stages of growth, namely prelarva, postlarva, juvenile and young stages, respectively.