Avtor/Urednik		Simčič, Tatjana
Naslov		Respiration and ingestion rate of different sized Daphnia pulex fed on four algal species
Prevedeni naslov		Dihanje in prehranjevanje različno velikih osebkov vrste Daphnia pulex s štirimi vrstami alg
Tip		članek
Vir		Acta Biol Slov
Vol. in št.		Letnik 53, št. 2
Leto izdaje		2010
Obseg		str. 61-70
Jezik		eng
Abstrakt		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.
Deskriptorji		DAPHNIA ANIMAL NUTRITION ALGAE POPULATION DENSITY RESPIRATION BIOMETRY