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Article
The growth, feed conversion ratio and fin damage of rainbow trout Oncorhynchus mykiss under self-feeding and hand-feeding regimes
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Article
Effect of light intensity on self-feeding of rainbow trout Oncorhynchus mykiss reared individually
The self-feeding abilities of individually reared rainbow trout Oncorhynchus mykiss were investigated under four different light intensities (7×10−2, 1×10°, 5×101, and 7×102 lx). There was no significant effect o...
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Article
Development of new self-feeding system for mass rearing of ayu Plecoglossus altivelis altivelis under artificial and natural light-dark cycles
Self-feeding of grouped ayu Plecoglossus altivelis altivelis was examined under an artificial light-dark (LD) cycle and natural day length using a trigger with a photosensitive sensor. In Experiment 1, approximat...
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Article
Photic and circadian regulation of self-feeding activity in ayu
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...
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Article
Pineal-dependent locomotor activity of lamprey, Lampetra japonica, measured in relation to LD cycle and circadian rhythmicity
Locomotor activity of the river lamprey, Lampetra japonica, was investigated under a light-dark (LD 12∶12) cycle and under continuous dark conditions. Intact lampreys were entrained to the light:dark cycle. They ...
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Chapter
Photoreceptor Organs and Circadian Locomotor Activity in Fishes
It is well known that fishes have photoreceptor organs other than the lateral eyes. The dominant extraretinal photoreceptor in fish is the pineal organ. The photosensitive function of the pineal organ in fish ...
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Article
Thresholds of retinal and extraretinal photoreceptors measured by photobehavioral response in catfish,Silurus asotus
Light thresholds of retinal and extraretinal photoreceptors in catfish were examined by the photobehavioral response using a method in which reflex body movements are recorded. Thresholds were determined in si...