菲牛蛭的人工养殖方式试验

于2004年5月8日至2005年3月8日,采用垄沟、池塘和水泥池三种养殖方式进行菲牛蛭的人工养殖试验。结果表明:在菲牛蛭的生长期,其条均净增重和成活率分别是:垄沟组1.253g和91.7%,池塘组1.087g和79.3%,水泥池组0.919g和67.3%;垄沟组的净增重和成活率与池塘组呈显著性差异(P<0.05);与水泥池组比较呈极显著性差异(P<0.01);池塘组与水泥池组比较呈显著性差异(P<0.05)。在菲牛蛭的冬眠期,采用垄沟养殖的菲牛蛭,其越冬后的成活率为85.3%,显著高于池塘组的74.4%(P<0.05),而水泥池组的成活率为0;相对增重率为-12.6%,与池塘组的-13.5%差异不显著(P>0.05)。土壤可提高人工养殖菲牛蛭的成活率并能使其安全越冬,水泥池养殖不适合菲牛蛭的越冬。

Experiment on the Breeding Methods of Poecilobdella manillensis

Three breeding methods of Poecilobdella manillensis including bred in field ditches,pools and plastered ponds were used in this paper from May 8,2004 to March 8,2005.The results indicated that during their growth period,the average net weight increasing per leech and the survival rate of P.manillensis which bred in three of above breeding sites were 1.253g and 91.7%,1.087g and 79.3%,0.919g and 67.3% respectively.P.manillensis bred in field ditches grew fastest and had a highest survival rate,which had significant difference with the group bred in pools(P<0.05)and in plastered ponds(P<0.01)respectively,likewise,there was significant difference between both groups bred in pools and plastered ponds.At the end of the hibernation period,the survival rate of the group bred in field ditches was 85.3%.The group bred in pools was 74.4%,both of two groups had significant difference(P<0.05),but there was no any P.manillensis survival bred in the plastered ponds,however,the relative rate of net weigh increasing of the field ditches group was-12.6%,the pools group was-13.5%,which had no significant difference between two groups(P>0.05).It was concluded that P.manillensis bred in both of field ditches and pools had higher survival rate relatively during their growth period and hibernation and the soil in field ditches or pools was more suitable for P.manillensis growth,in which P.manillensis could hibernated safely.Although P.manillensis could develop in plastered ponds naturally during the growth period,they had lower survival rate.Besides,they all died out at the end of the hibernation.Thus,the plastered ponds could not be used as a breeding site for P.manillensis hibernation.