Author/Editor		Simčič, Tatjana
Title		Respiration rate and respiratory electron transport system (ETS) activity of chironomid larvae from mountain lakes (NW Slovenia)
Translated title		Stopnja dihanja in aktivnost dihalnega elektronskega transportnega sistema (ETS) pri ličinkah trzač iz gorskih jezer (SZ Slovenija)
Type		članek
Source		Acta Biol Slov
Vol. and No.		Letnik 47, št. 1-2
Publication year		2004
Volume		str. 77-88
Language		eng
Abstract		Respiration rate (R) and electron transport system (ETS) activity were measured in larvae of four chironomid species, Chironomus thummi (Kieffer), Paratanytarsus austriacus (Kieffer), Procladius (Holotanypus) spp., and Zavrelimyia barbatipes (Kieffer) from three mountain lakes. ETS activity and respiration rate, measured at a standard temperature of 20 degrees C, differed significantly between species (ANOVA: p<0.001). ETS activity ranged from 10.3 microL 02 mg-1 DW h-1 for Zavrelimyia to 27.6 micrpL 02 mg-1DW h-1 for Paratanytarsus. The lowest respiration rate was observed for Procladius (4.0 microL 02 mg-1DW h-1) and the highest for Paratanytarsus (12.4 microL02 mg-1 DW h-1 ). ETS activity and respiration rate of chironomids decreased with increasing size of the animals (p<0.001); b values for ETS activity and respiration rate were 0.82 and 0.66, respectively. Respiration rate correlated significantly with ETS activity for all four species investigated. This study revealed that the ETS/R ratio differed between species (ANOVA: p<0.001). A low ratio (0.98) was determined for Zavrelimyia, while Procladius showed the highest value (3.88). The differences can be explained by body size, and the ecological preference and tolerance of each chironomid species.
Summary		Stopnjo dihanja in aktivnost elektronskega transportnega sistema (ETS) smo določali pri ličinkah štirih različnih vrst trzač, Chironomus thummi (Kieffer), Paratanytarsus austriacus (Kieffer), Procladius (Holotanypus) spp., in Zavrelimyia barbatipes (Kieffer), ki smo jih nalovili v treh gorskih jezerih. Aktivnost ETS in stopnja dihanja, ki smo ju merili pri standardni temperaturi 20 stopinj C, sta se značilno razlikovali med vrstami (ANOVA: p<0.001). Aktivnost ETS se je gibala med 10.3 microL 02 mg-1DW h-1 pri ličinkah Zavrelimyia in 27.6 miceoL 02 mg-1 DW h-1 pri ličinkah Paratanytarsus. Najnižjo stopnjo dihanja smo določili pri ličinkah Procladius (4.0 microL 02 mg-1DW h-1), najvišjo pa pri ličinkah Paratanytarsus (12.4 microL 02 mg-1DW h-1). Aktivnost ETS in stopnja dihanja ličink sta se zmanjševali z naraščajočo velikostjo živali (p<0.001); vrednosti b sta znašali 0.82 za aktivnost ETS in 0.66 za dihanje. Opazili smo pozitivno korelacijo med stopnjo dihanja in aktivnostjo ETS pri vseh štirih vrstah. Raziskava je pokazala značilne razlike v razmerju ETS/R med vrstami (ANOVA: p<0.001). Nizko razmerje (0.98) je bilo določeno pri ličinkah Zavrelimyia, medtem ko je bilo pri ličinkah Procladius določeno najvišje razmerje (3.88). Različna razmerja so posledica razlik v vrstno-specifični telesni velikosti ter različne ekološke preference in tolerance pri posamezni vrsti trzač.
Descriptors		FRESH WATER CHIRONOMIDAE LARVA ECOSYSTEM ELECTRON TRANSPORT ANALYSIS OF VARIANCE