Topic
Aeshna multicolor
About: Aeshna multicolor is a research topic. Over the lifetime, 2 publications have been published within this topic receiving 20 citations.
Papers
TL;DR: Del feeding periodicity and diet composition of nymphs of Aeshna multicolor and Lestes unguiculatus were examined at 6 h intervals in a small pond and variation in diet composition was substantial in each species.
Abstract: SUMMARY.
1
Diel feeding periodicity and diet composition of nymphs of Aeshna multicolor and Lestes unguiculatus were examined at 6 h intervals in a small pond. Feeding intensity of A. multicolor increased from 06.00 hours to approximately 18.00 hours whereas food intake by L. unguiculatus was uniformly high between 12.00 and 18.00 hours. Feeding of both species was reduced during the night.
2
Diel variation in diet composition was substantial in each species. Chironomid larvae were the major prey (48.9%) in the diet of A. multicolor. Zooplankton, mainly cladocerans (42.0%) and ostracods (21.1%), were the principal prey of L. unguiculatus. Detritus composed a substantial portion of the diets of both species.
3
Diet overlap (Cλ) at each 6 h interval was high (0.43–0.72) when detritus was included in the calculation and was low (0.48–0.54) when detrital material was omitted.
15 citations
TL;DR: The dragonfly fauna of the Cypress Hills consists of species with the following Canadian distributions: 22 transcontinental (13 boreal, 7 southern, and 2 widespread), 4 southwestern, 2 western boreal-northwestern, 2 cordilleran, and 1 primarily prairie as mentioned in this paper.
Abstract: The Cypress Hills consist of a hilly elongate plateau straddling the Alberta–Saskatchewan border. They are mostly covered in a foothills-type vegetation but are surrounded by short-grass prairie and lie about 250 km east of the Rocky Mountain foothills. The upper 95 m remained unglaciated as a nunatak during the Wisconsinan glaciation. Dragonflies were collected at various times during May–August in 1982–1984 at 24 localities in Cypress Hills Provincial Park, Alberta. Thirty-one species were obtained, 3 of which ( Aeshna multicolor , Gomphus graslinellus , and Libellula pulchella ) are new records for Alberta. The dragonfly fauna of the Cypress Hills consists of species with the following Canadian distributions: 22 transcontinental (13 boreal, 7 southern, and 2 widespread), 4 southwestern, 2 western boreal–northwestern, 2 cordilleran, and 1 primarily prairie. An analysis of this fauna indicates that, following northward retreat of the glaciers, 22% of the present species came from cordilleran regions and 42% were derived from the boreal fauna. This corroborates the boreo–montane forest connection that is considered to have extended along the retreating ice front before the climate became too warm and resulted in the forest being replaced by grassland.
8 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 1985 | 2 |