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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 835

B.B. Jana and G.P. Pal; Some life history parameters and production of Daphnia carinata (King) grown in different culturing media. Water Research 17(7):735-741, 1983

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Estimates of the abundance and production of Daphnia carinata in six mass culture experiments revealed higher values in the cow dung medium compared with other manures tested. Average production ranged from 1.2 to 223 mg m-3 week-1 and average biomass of the population from 1.3 to 194 mg m-3 week-1. The P/B coefficient was highest in the mohua (Madhuca indica) oil cake (1.15) and lowest in the poultry manure (0.77). Daphnia started reproducing at the age of 6-9 days in different culture media. Longevity was higher in the field (under 36 days) than in the laboratory. The total numbers of offspring per female was closely correlated with the mean number of eggs per female in her life span. The intrinsic rate (r) and the finite rate (er) of population of growth of Daphnia were markedly higher in the field than in the laboratory.