The relation between the growth and survival of Penaeus monodon and artificial shelter.

• Main Authors: Wur, Fehng Your, 吳鳳酉
• Other Authors: Mok, Hin Kiu;Su, Mao Sen
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/38742185665126369334

碩士 === 國立中山大學 === 海洋生物研究所 === 82 === Three experiments were conducted in FRP tanks with artificial shelters to study the effect of shelters on Penaeus monodon. In one experiment, distribution of P. monodon on artificial shelters was examined. Distribution of P. monodon in horizontal shelter changed with time of day. It tends to stay on the bottom in the morning and at noon but spreaded to the other layers in evening and at night. P. monodon tends to distribute on edges at noon and in the evening. The useage were not different in different time. Distribution of P. monodon uniformly distribute among the vertical layers in the morning and at noon. In the evening, however, P. monodon distributed differently among the vertical layers. Except for time noon, P. monodon tends to the edge and bottom in a vertical layer. In the second experiment, growth and survival of P. monodon kept in high density and in tank with horizontal or vertical shelters was monitored. It was fed with arti- ficial diet for twelve weeks. The biomass and growth rate of P. monodon cultured under this experimental condition were higher than the control(i.e., P. monodon cultured in tank without artificial shelter). Survival rate of P. monodon in tank with verticial shelters was the best. In the third experiment, molting frequenciesof P. monodon in tanks with or without artificial shelters and in five density i.e., 30, 35, 40, 45 and 55 shrimp/square meter were not significiantly different. But the survival rate of P. monodon in vertical shelters and highest density (i.e., 55 shrimp/square meter) was higher than the control.