Influence of the population density and the amount of food on Chironomus plumosus (L.) and Tubificidae. Laboratory experiments

• Autorzy: Kajak Z. , Prus P.
• Języki publikacji: EN

Abstrakty

EN

The aim of this paper has been to examine experimentally the importance of the density of larvae and of the addition of the food for Chironomus and Tubificidae using selected parameters and indices of their populations. Increase of the density of Chironomus plumosus larvae (0.5-50.0 thousands ind. m^-2) in laboratory experiments resulted in the decrease of emergence of imagos, number of tube apertures (3.5-0.4 apertures ind.^-1), and in the lower rate of tubes building. The addition of the food (powdered dry daphnids or food tablets for aquarial fish) had only slight effect on tube numbers but it decreased clearly the getting out of larvae from tubes (probably due to improved feeding conditions inside tubes). It had also a slight negative effect on the survival of larvae. Numbers and individual growth of Tubificidae were positively dependent on the addition of the food (also in the form of naturally dead Chironomus larvae) and negatively - on the density of Chironomus

Słowa kluczowe

EN

benthic communities; Chironomus; density dependence; feeding behaviour; interspecific interactions; Tubificidae

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2004
• Tom: Vol. 52, nr 1
• Strony: 47--53
• Opis fizyczny: Bibliogr. 20 poz., wykr.

Twórcy

autor

Kajak Z.

• Former Institute of Ecology PAS, Dziekanów Leśny, 05-092, Łomianki, Poland

autor

Prus P.

• The Stanisław Sakowicz Inland Fisheries Institute, Department of River Fisheries, Główna 48 str., Żabieniec, 05-500 Piaseczno, Poland

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