Author/Editor		Simčič, Tatjana
Title		Respiration and ingestion rate of different sized Daphnia pulex fed on four algal species
Translated title		Dihanje in prehranjevanje različno velikih osebkov vrste Daphnia pulex s štirimi vrstami alg
Type		članek
Source		Acta Biol Slov
Vol. and No.		Letnik 53, št. 2
Publication year		2010
Volume		str. 61-70
Language		eng
Abstract		Respiretion rate and ingestion rate for four different algal species (Scenedesmus guadricauda, Asterionella formosa, Aphanimmenon flos-aquae and Planktotrix rubescens) of different sized Daphnia pulex were measured in the laboratory. Population of D. pulex grew maximally when it fed S. quandricauda, but the presence of P. rubescens and A. flos-aguae caused negative population growth rate. Ingestion rates increased with increasing body size for all investigated algae; the lowest b value was obtained for S. quadricauda and the highest one for P. rubescens. The amount of ingested carbon exceeded the required amount for standard metabolism in both small and large sized individuals fed all four algal species. Relalively higher amount of ingested A. flos-aquae and P. rubescens in comparison with A. formosa and S. quadricauda and the results of the growth experiments indicate that the inhibitory effect of filamentous blue-green algae on D. pulex is more due to toxicity, low assimilation efficiency or/and inadequate composition than incapabilily of ingeslion due to mechanical interference with filaments.
Descriptors		DAPHNIA ANIMAL NUTRITION ALGAE POPULATION DENSITY RESPIRATION BIOMETRY