1 JULY 1999
EFFECT OF VARIOUS ANIMAL MANURES ON THE GROWTH OF A FRESHWATER GREEN ALGAE (CHLORELLA SPP.) AND ROTIFER (BRACHIONUS CALYCIFLORUS)
T. Dahril, M. Ahmad, S. Iizuka-1998
Asian Fisheries Science, 11 : 193-201
Abstract :
The effects of chicken, duck, quail, buffalo and horse manure on the growth of Chlorella spp. and Brachionus calyciflorus were investigated. While the effects vary considerably, results indicated that all manures tested promote growth of Chlorella spp. The greatest growth with maximum density of 11 x 106 cells/ml of Chlorella spp. was obtained in treatment with chicken manure. The density of Chlorella spp. decreased two days after inoculation of B. calyciflorus. No direct promotive effect of animal manure on the growth of rotifer was observed. However, animal manure promoted the growth of Chlorella spp. which in turn enhanced the growth of B. calyciflorus. Maximum density of B. calyciflorus was found under semi-continuous culture at 542 ind/ml, when treated with chicken manure. Best growth of Chlorella and B. calyciflorus occurred in treatment with chicken manure, which was probably related to its high nitrogen concentration.
(Faculty of Fisheries, University of Riau, Jl. Pattimura No. 9, Pekanbaru, Riau, Indonesia)