The effect of different diets on production and population specific growth rate of the freshwater Cladoceran Ceriodaphnia quadrangula (Muller, 1785)

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Abstract

In this study, effects of five different diets including green algae, Scenedesmus
quadricauda, mixture of S. quadricauda and baker's yeast, cattle manure, poultry manure,
mixture manure (cattle + poultry, 1:1 ratio in weight) were examined on density, specific
growth rate and doubling time of freshwater Cladoceran, Ceriodaphnia quadrangula
population, at two high and low levels of food density with three replications. The results
showed that the maximum population density (184 individuals/50ml), maximum specific
growth rate (SGR) (0.18/day) and minimum doubling time (Dt) (3.85 days) were obtained
when C. quadrangula fed with S. quadricauda at high density (50×104 cell/ml). In addition,
the minimum population density (7.3 ind/50 ml), minimum SGR (0.019 /day), and maximum
Dt (36.2 days) resulted from C. quadrangula fed on cattle manure at low diet density (5mg).
In this research, maximum (800±34.6μm) (Mean ±SE) and minimum (521±31.6μm) body
length of C. quadrangula measured when fed with cattle manure at low diet density and S.
quadricauda at high diet density, respectively. In conclusion, the results of current study
illustrated that S. quadricauda as diet gave better performance for rearing of C. quadrangula
compared to other diet treatments.
*Corresponding author

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Iranian Scientific Fisheries Journal
Volume 20, Issue 2
March and April 2011
Pages 37-48

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