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- Title
Emergence, reproduction, and growth of setipalpian Plecoptera in southern Ontario.
- Authors
Harper, P. P.
- Abstract
Plecopteran nymphs were collected at monthly intervals during a one-year program in 11 streams of Southern Ontario. 7.6 per cent of these belonged to the suborder Setipalpia and represented 16 species. Only seven species occurred in sufficient numbers to permit a study of their life cycle. A special emphasis is given in this study to the biology of the eggs, the younger nymphs and the adults. Isoperla clio, I. transmorina, I. cotta, and I. frisoni are univoltine with a simple and straightforward life history. There is, however, in some species a differential growth of the nymphs which results in a wide size-range of the nymphs at any one time. The chloroperlid Alloperla onkos has a two-year cycle. The perlids Faragnetina media and Fhasganophora capitata require three and two years respectively to complete their cycle. Parthenogenesis is reported in P. media.
- Subjects
ONTARIO; STONEFLIES; HABITATS; SEX (Biology); INSECTS; AQUATIC biology
- Publication
Oikos, 1973, Vol 24, Issue 1, p94
- ISSN
0030-1299
- Publication type
Article
- DOI
10.2307/3543256