Effects of intraspecific competition on the life cycle of the stonefly, <Emphasis Type="Italic">Nemurella pictetii</Emphasis> (Plecoptera: Nemouridae) |
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| Authors: | Reimo Lieske Peter Zwick |
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| Institution: | 1.Limnologische Fluss-Station des Max-Planck-Instituts für Limnologie,Schlitz,Germany |
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| Abstract: | Background Considerable variation of life cycle duration in given insect species has been frequently recorded. Splitting of populations
into cohorts with different life cycle lengths may occur, sometimes even between siblings from the same batch. Larval populations
of the stonefly Nemurella pictetii in central Europe regularly split into a very fast developing and a normal univoltine cohort, leading to partial multivoltinism.
The causes for such variation remain unknown but presumably act on the larval stage in which most of the life cycle is spent.
We therefore studied possible effects of intraspecific competition on growth and development of larvae in the laboratory. |
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