论文信息 - The Influence of Water Temperature on the Appearance of Common Carp Cyprinus carpio around a Set-Net in the Sounth Basin of Lake Biwa

The Influence of Water Temperature on the Appearance of Common Carp Cyprinus carpio around a Set-Net in the Sounth Basin of Lake Biwa

At Lake Biwa, It is commonly said that prevailing northeasterly or southwesterly wind on the lake brings good catch of common carp C}7prinus carpio in set-net fishery. In order to research this phenomenon, the appearance of comrnon carp, water temperature and winds near a set-net were monitored in the south basin of Lake Biwa from 25 June to 29 September 2003. Feur fish were surgically implanted with transmitters, released near the set-net and monitored for 95 days using receivers installed on the set-net, Water temperatures at two depths (2.5 and 4.5m) near the net were also recorded eontinuously every 15 minutes by temperature loggers. The tagged fish disappeared from the area when the temperature increased, but appeared when the temperature declined following prevailing wind occurred, Our results suggest that the change in water temperature may affect the horizontal movement of the fish in the south basin of Lake Biwa during summer.

Y. Mitsunaga | K. Komeyama | T. Yamane | Masanari Matsuda

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