Title: Effect of temperature and photoperiod on sexual maturation and spawning of the common carp
Abstract: Japanese common carp “Magoi”, Cyprinus carpio (Linnaeus), were maintained in cool water (16°C) combined with long (16L-8D) or short (12L-12D) photoperiods from November. After about 3 months at 12L-12D16°C, four out of five fish spawned totally when transferred to 16L-8D24°C, while fish kept under 16L-8D16°C failed to spawn when transferred to 12L-12D24°C. Similarly, all five fish from 16L-8D16°C spawned immediately at 16L-8D24°C, but those at 12L-12D16°C failed to spawn when transferred to 12L-12D24°C. After about 6 months carp held at 16L-8D16°C spawned even at 12L-12D24°C. It is presumed that this group was closer to final maturation and did not need the stimulative effect of a long photoperiod. When maintained at 16°C, carp completed rematuration within 3 to 4 months, including an initial stay of 2 to 3 weeks at 24°C, and could stay mature indefinitely.
Publication Year: 1986
Publication Date: 1986-02-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 44
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