살조개, Protothaca jedoensis 초기치패의 저질 및 먹이생물별 성장

Growth of Protothaca jedoensis Spat by Substratum and Food Organisms

살조개, Protothaca jedoensis의 인공종묘생산 기술개발을 목적으로 생물학적 기초자료를 얻고자 저질입도별 채묘 및 치패사육에서 먹이생물의 종류와 농도에 따른 성장과 생존율을 조사하였다. 저질입도별 채묘에서 최적 채묘기질은 극조립사(Ø0.5-2㎜)로 가장 높은 성장(493.2±0.4㎛)과 생존율(13.0±0.9%)을 보였다. 먹이생물별 치패사육에서 Isochrysis galbana가 가장 높은 성장(1644.0±0.8㎛)과 생존율(79.7±2.3%)을 보였으며, 혼합구, Chaetoceros calcitrans, Monochrysis lutheri, Pavlova lutheri 순으로 나타났다. 먹이생물(혼합) 농도별 치패사육에서 1×104cells/㎖가 가장 높은 성장((1637.0±1.0㎛)과 생존율(75.0±0.9%)을 보였으며, 2×104cells/㎖, 4×104cells/㎖, 0.5×104cells/㎖ 순으로 나타났다.

In order to obtain the basic information for artificial seedling production of venus clam, Protothaca jedoensis, growth and survival rate were investigated by substratum composition on spat collection, and species and concentration of food organisms during spat stage. The optimal substratum for spat collection was the sand size (Ø0.5-2 ㎜) showing that the highest growth and survival rate of spat were 493.2±0.4 ㎛, 13.0±0.9 %, respectively. As for spat rearing by four species of food organism (phytoplankton), Isochrysis galbana, Chaetoceros calcitrans, Monochrysis lutheri, and Pavlova lutheri were used singularly and the mixture of the four species was used. The highest growth and survival rates were observed in the Isochrysis galbana (1644.2±0.8 ㎛, 79.7±2.3 %), and followed by mixture group, Chaetoceros calcitrans, Monochrysis lutheri, and Pavlova lutheri. In the concentration of the four mixed food organisms on spat rearing, the highest growth and survival rates were observed in the concentration of 1×104 cells/㎖ (1637.0±1.0 ㎛, 75.0±0.9 %), and followed by 2×104 cells/㎖, 4×104 cells/㎖, and 0.5×104 cells/㎖.