Abstract
Indoor model stream channels in the Oregon Coast Range (USA) supported a comparatively high density of Polycentropus variegatus larvae in contrast to natural streams in the immediate vicinity.
P. variegatus exhibited a univoltine life cycle. Small size classes and early larval instars dominated the population throughout the fall and winter months, although all size classes and instars were represented in benthic and drift samples. Growth was rapid during May and June. Pupation, emergence, and oviposition occurred throughout the summer months.
Larval densities were greater on graval substrates than on bedrock and silt. Larvae were generalist predators. Mayflies, crustaceans, chironomids, stoneflies, Polycentropus larvae, and oligochaetes contributed to their diet.
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© 1987 Dr W. Junk Publishers, Dordrecht
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Wevers, M.J., Wisseman, R.W. (1987). Larval Development, Substrate Preference, and Feeding Habits of Polycentropus Variegatus Milne in Model Stream Channels (Trichoptera Polycentropodidae). In: Bournaud, M., Tachet, H. (eds) Proceedings of the Fifth International Symposium on Trichoptera. Series Entomologica, vol 39. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4043-7_48
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DOI: https://doi.org/10.1007/978-94-009-4043-7_48
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