2013 Volume 61 Issue 1 Pages 019-026
Growth and survival of larval and juvenile Gengoroubuna Carassius cuvieri were determined in paddy fields, to evaluate importance of paddy fields as an initial growth environment for the fish. Twenty to eighty individuals per m2 of C. cuvieri larvae were released and reared in 7 paddy fields near the coastal area of the eastern side of Lake Biwa during 23 to 27 days in 2009 and 2011, respectively. Survival rates of the fish at the end of the experiment varied from 37.9 to 76.1% and standard length at that time was from 12.2 to 20.0 mm. Growth rates in larvae and juveniles were higher in paddy fields than those of fish reared in ponds. These results suggest that paddy fields are considered to be highly effective as an initial growth environment for C. cuvieri.
