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- Title
Factors affecting the distribution of some Phryganeaeid (Trichoptera) in Malham Tarn, Yorkshire.
- Authors
Bray, R. P.
- Abstract
This paper describes a distribution problem involving Agrypnetes crassicornis and Phryganea obsoleta (Trichoptera : Phryganeidae) in Malham Tarn, Yorkshire. The only suitable habitat for their larvae is the offshore vegetation, chiefly Chara delicatula, but owing to the specialized egglaying behaviour of this family and the absence of other sites, the eggs of Agrypnetes crassicornis are laid on the exposed rocky shoreline. The situation with Phryganea obsoleta differs in that the emergence of Potamogeton spp. provides new oviposition sites away from the shore. Investigations on both species however have provided further support for an hypothesis which postulates the importance of wind-induced water movements in rapidly dispersing newly hatched insect larvae to the favourable habitats in deep water.
- Subjects
YORKSHIRE (England); ENGLAND; CADDISFLIES; INSECTS; LARVAE; DEVELOPMENTAL biology; HABITATS
- Publication
Freshwater Biology, 1971, Vol 1, Issue 2, p149
- ISSN
0046-5070
- Publication type
Article
- DOI
10.1111/j.1365-2427.1971.tb01553.x