A study of the freshwater rotifer Brachionus calyciflorus in Pekanbaru, Riau, Indonesia |
| |
Authors: | Tengku Dahril |
| |
Institution: | (1) Faculty of Fisheries, University of Riau, Jl. Pattimura No. 9, Pekanbaru, Riau, Indonesia |
| |
Abstract: | Brachionus calyciflorus is one of freshwaterrotifers found in fish ponds in Pekanbaru, Riau,Indonesia. Its density varied depending on that ofphytoplankton. Maximum of 2.5 ×103 ind. l–1 was found in ponds fertilised with animal wastes.The fecundity and population growth of B.calyciflorus was studied. Results indicated that the fecundity of amictic females was higher thanthat of unfertilized mictic females. During their life span, amictic and mictic females produced29.7 and 12.5 eggs per female, respectively. In the mass culture of 500 ml media, the highestdensity of female and male rotifers was 975.8 and 9.6 ind. ml–1, respectively. During 8 days cultureperiod, they also produced eggs as many as 124.2 ml–1.Human and animal wastespromoted the growth of phytoplankton as food forrotifers in the pond. A laboratory study confirms this. The best growth of B. calyciflorus at a density of 109 ind. ml–1 was found at 0.5 g l–1 of humanexcreta. A high density of B. calyciflorus (542ind. ml–1) was also found in semi-continuous culturewith chicken excreta. |
| |
Keywords: | Brachionus calyciflorus fecundity population growth human and animal excreta |
本文献已被 SpringerLink 等数据库收录! |
|