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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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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...