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- Title
Photic and circadian regulation of self-feeding activity in ayu.
- Authors
Amano, Masafumi; Iigo, Masayuki; Furukawa, Kiyoshi; Tabata, Mitsuo; Yamamori, Kunio
- Abstract
The self-feeding rhythms of ayu Plecoglossus altivelis altivelis were examined. Individual ayu (mean body weight 40 g) were held in 60-L glass tanks equipped with self-feeders. Six of 14 fish learned self-feeding during the experiment. Under two different light–dark (LD) conditions (16 h:8 h and 8 h:16 h LD), self-feeding was synchronized to the LD cycle, and feeding occurred almost exclusively during the light phase. During exposure to constant light (LL), circadian feeding rhythms were observed. These results indicate self-feeding rhythms in ayu are restricted to the light phase under LD conditions and are controlled by the circadian clock under LL conditions.
- Subjects
FISHERY sciences; AYU; CIRCADIAN rhythms; FISH feeds; FISH behavior; FISH physiology; PLECOGLOSSUS; FISHERIES; AQUACULTURE
- Publication
Fisheries Science, 2006, Vol 72, Issue 2, p250
- ISSN
0919-9268
- Publication type
Article
- DOI
10.1111/j.1444-2906.2006.01145.x