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실내 수조에서 해삼(Apostichopus japonicus , Selenka)의 은신처 선택에 대한 개체 크기별 행동 특성
박슬기나라(Seulginara PARK),한승한(Seunghan HAN),황현우(Hyeonwoo HWANG),권인영(Inyeong KWON),김태호(Taeho KIM) 전남대학교 어업기술연구소 2017 어업기술연구소보고지 Vol.10 No.1
This study was conducted to examine behavioral characteristics of sea cucumber for seeking shelter space. Physical factors were restricted to hole sizes (0.0014, 0.0025 and 0.0079 m2) and materials (porous cement mortar, cement mortar and PVC) of blocks for shelter structure and focused on the moving pattern of sea cucumber when they seek the suitable shelter space by body sizes and shelter materials. A series of experiments were conducted in a recirculation aquaculture system with dimensions of 2100×1000×1100 mm. 30 sea cucumbers (small: 13.05±5.17 g, medium: 55.95±4.13 g and large: 100.65±3.07 g) were used for each experiment. The experiments were replicated 6 times at 15℃. The movement patterns of sea cucumber were observed using video and naked eyes for 12 hours twice a day. The numbers of the animals attracted by different blocks were observed and recorded in twice a day. The data were evaluated by an analysis of PVS program. The moving distance (avg. 1.43 m) and speed (avg. 4.34 10<SUP>-3</SUP>m/s) of sea cucumber showed the highest activity at large size group. Also, larger size of sea cucumbers showed the active motility for seeking shelter place than smaller.