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- Title
Life History of a Population of Protonemura intricataRis, 1902 Insecta, Plecoptera in a Constant Temperature Stream in Central Europe.
- Authors
Zuzana Kozáeková; José Manuel Tierno de Figueroa; Manuel Jesús LópezRodríguez; Pavel Beracko; Tomas Derka
- Abstract
The nymphal biology life cycle, secondary production and feeding of a population of Protonemura intricatawas studied in a calcareous stream with almost constant temperature 7–8 °C through the year at Prosiek valley Choské Vrchy Mts., West Carpathians, Slovakia. The results were compared with those previously known for this species in other areas. According to our data, the species has a complicated life cycle consisting of two cohorts with different duration probably a cohort splitting. This life cycle seems to be uncommon among the Plecoptera, which usually has simple univoltine or semivoltine life cycles, and could be probably attributed to the constant temperature regime similar to that of tropical environments. One factor, the photoperiod length, was positively correlated with monthly growth rates. The nymphal growth varied throughout the year, but the highest growth was in late spring and summer, and the lowest was in winter. The annual secondary production was very high 909.4 mg · m–2 despite not being the most frequent taxon in the stream. The highest monthly production values were observed in the autumnalwinter period November–December due to massive hatching of nymphs. The lowest production values were observed in late summer and early autumn. Analyses of gut contents showed that this species behaves mainly as gatherercollector, but also as shredder and, occasionally, as scraper. Changes in the gut content composition were detected in relation to the size. Comparing our results with those of the literature, it can be inferred that different populations of P. intricatacan show notable differences in their life history when inhabiting places with different thermal conditions. © 2009 WILEYVCH Verlag GmbH & Co. KGaA, Weinheim
- Subjects
BIOLOGY; LIFE cycles (Biology); PROTONEMATA; STONEFLIES
- Publication
International Review of Hydrobiology, 2009, Vol 94, Issue 1, p57
- ISSN
1434-2944
- Publication type
Article