Autökologische Untersuchungen zum Lebenszyklus von Setipalpia-Arten (Plecoptera)

摘要: Abstract It takes Isoperla goertzi and Diura bicaudata two Perlodes microcephala one year to complete a generation. Differences in the lengths of life cycles are be explained by characeristics three stages: egg, nymph, adult. In an artificial stream D. is found migrate upstream more actively drift less frequently than I. goertzi. Drift movement nymphs Lauter creek maintain steady population. contrast there loss during nymphal goertzi, balance restored adult stage.