use of pineapple juice for
elimination of egg stickines of common carp (cyprinus carpio l.)
R.T. Thai, T.G. Ngo-2004
Asian Fisheries Science, 17(1-2): 159-162
Abstract:
Four treatments including three different
concentrations of pineapple solution (1%, 3%, 5%) and the traditional method
(salt/urea/tannin solutions) were used to eliminate egg stickiness of common
carp. Using the traditional method, fertilization and hatching rates were
74.5% +/- 1.2 and 70.2% +/- 1.1, respectively. The highest fertilization
rate (89.3% +/- 0.7) and hatching rate (86.6% +/- 1.4) were found with
treatment of 1% pineapple juice solution and was significantly different
from those obtained with other treatments (P<0.005). Using pineapple
juice for desticking common carp eggs also reduced the time of egg handling
from almost one hour required with the traditional method, to about three
minues, as well as increasing fertilization and hatching rate under hatchery
conditions.
(School of Ecology and Environment, Deakin
University, P.O. Box 423, Warrnambool, VIC 3280 Australia)