Artificial burrow preference by the Japanese crayfish Cambaroides japonicus |
| |
| Authors: | Kazuyoshi Nakata Tatsuo Hamano Ken-Ichi Hayashi Tadashi Kawai Seiji Goshima |
| |
| Institution: | Department of Applied Aquabiology, National Fisheries University, Shimonoseki, Yamaguchi 759-6595;, Hokkaido Central Fisheries Experimental Station, Yoichi, Hokkaido 046-8555 and; Department of Marine Biological Science, Faculty of Fisheries, Hokkaido University, Hakodate, Hokkaido 041-8611, Japan |
| |
| Abstract: | SUMMARY: Preference for artificial burrows by the endangered Japanese crayfish species Cambaroides japonicus was studied to improve its cultivation. The occupation of artificial burrows, which were made from straight polyvinyl chloride pipes of different internal diameters ( Y , mm), by crayfishes of different total lengths ( X , mm) was significantly ( P < 0.001, n = 56) described by a linear regression: Y = 0.49 X + 3.42 (19.0 ≤ X ≤ 70.2). Among burrows of different lengths crayfish total length (TL) × 1, × 2, × 3, and × 4], crayfishes significantly preferred burrows that were greater than TL × 3 ( P < 0.001, n = 588). |
| |
| Keywords: | artificial burrow Cambaroides japonicus crayfish cultivation |
|
|
