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KMID : 0894520110150020133
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Development & Reproduction
2011 Volume.15 No. 2 p.133 ~ p.141
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Spawning Periodicity and Behavior of Amphiprion melanopus and Development of Mass Hatching System for Clownfishes
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Noh Gyeong-Eon
Roh Sum
Shin Sang-Ok
Chang Young-Jin
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Abstract
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The marine ornamental industry has become a multi-billion dollar industry these days. As developing, however, this industry has been criticized for the indiscriminate captures and the destruction of the surrounding environment. To circumvent these problems, it is suggested to breed the organisms artificially. While clownfishes Amphiprion sp. and Premnas sp. are the most famous ornamental organisms in the trade, few studies are yet available on the culture and commercial production of these fishes. These studies were performed to investigate the spawning periodicity, behavior and the habits during egg incubation, and to provide the information on the mass hatching system. The spawning periodicity and frequency were different in 4 pairs under the constant condition, temperature, salinity and photoperiod. On the contrary, the male’s behaviors for egg incubation are almost same in the all. The egg-fanning activity of the male increased as the developing eggs reaching to the hatching day. Based on the above results, we designed a new artificial hatching system, the rotating type (RT), and compared it with the aeration type (AT) and spray type (ST) that were previously described. RT showed higher hatching rate of 87.3% than AT (74.4%) and ST (60.5%). Also, there were no significant differences in the hatching rate regardless of the number (2, 3, 5) of hatching plates. We suggest RT may accommodate various number of hatching plates and constitute a better hatching system for clownfishes.
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KEYWORD
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Clownfishes, Amphiprion sp., Premnas sp., Ornamental fish, Spawning periodicity, Incubation, Hatching system
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