Relationship between Feeding Frequency and Survival of the Larvae of Freshwater Prawn, Macrobrachium nipponense in Freshwater Rearing Condition

概要

論文の詳細を見る
This study dealt with the relationship between the survival of Macrobrachium nipponense larvae and feeding frequencies with Artemia nauplii in freshwater rearing condition. The materials were taken so as to represent three different environmental conditions of original distribution areas, i.e. a freshwater lake, Lake Suwa-ko, a brackish water lake, Lake Sanaru-ko, and a river flowing into the sea, River Ohta-gawa. Artemia nauplii were given once, twice or four times per day to the larvae. The survival rates of the larvae taken from Lake Suwa-ko and Lake Sanaru-ko fed once or twice per day were 0% or 5%. The survival rates of the larvae improved 5% to 25% when fed four times per day. On the other hand, the larvae taken from River Ohta-gawa did not survive to next zoeal stage irrespective of the increased feeding frequency of Artemia nauplii. It is noticeable that in freshwater rearing, the increase of feeding frequency raised the survival rates of the larvae from two lakes, which are freshwater and brackish water, but did not affect that of the larvae from the river.
日本水産増殖学会の論文