We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Population Dynamics of Littoral Rotifers (Lecane inermis and Lepadella rhomboides) in Relation to Algal (Chiorella vulgaris) Food Density.
- Authors
Sarma, S. S. S.; Maria-Isabel, Ramírez Alonso; Nandini, S.
- Abstract
We cultured two non-planktonic rotifers (L. inermis and L. pate/la) using four algal food densities (0.1 × 106, 0.2 × 106, 0.4 × 106 and 0.8 × 106 cells mL•1 of Chlorella vulgaris). Under the tested food levels, L. inermis had long (about 15 days) lag phase, while L. rhonthoides started to increase its population abundance from the 3rd day onwards. At low food density (0.1 × 106 cells mL•1) L. inermis performed better, while at intermediate concentrations (0.2 × 106 and 0.4 × 106 cells mL•1), L. rhomboides grew to higher densities. The highest algal density resulted in reduced population growth of both the rotifer species. The rates of population increase (r) of L. inermis and L. rhomboides varied from 0.18 to 0.31 day•1.For both the rotifer species the r was significantly affected by the algal concentration. When the daily rate of population increase was plotted as function of population density, a significant inverse relation was obtained for both the rotifer species. Results have been discussed to explain the differences in the relative abundances both the rotifer species in natural waterbodies with seasonally varying phytoplankton levels.
- Subjects
POPULATION dynamics; ROTIFERA; ALGAE as food; PLANKTON culture; PHYTOPLANKTON populations; ANIMAL population density; CULTURES (Biology); BODIES of water; ZOOGEOGRAPHY
- Publication
International Journal of Ecology & Environmental Sciences, 2006, Vol 32, Issue 3, p271
- ISSN
0377-015X
- Publication type
Article