Search for dissertations about: "group foraging"
Showing result 11 - 15 of 20 swedish dissertations containing the words group foraging.
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11. Phylogenetic relationships and species richness of coprophilous ascomycetes
Abstract : Coprophilous ascomycetes are a diverse group of saprobes, of which many belong to three families, Delitschiaceae, Phaeotrichaceae and Sporormiaceae, within the large order Pleosporales. The natural relationships and circumscription of these families are unclear, especially within the family Sporormiaceae, where the generic delimitation have been questioned. READ MORE
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12. Habitat composition and restocking for conservation of the white-backed woodpecker in Sweden
Abstract : In Sweden, intense human land use, especially forestry, has led to profound changes in the landscape over time, especially within the forest ecosystems. A consequence of this is that several specialist species have become endangered. One group of specialists is the woodpeckers. READ MORE
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13. Movement ecology of aerial insectivorous birds : Individual-based studies on swifts and nightjars
Abstract : Many birds are predisposed to annually undertake movements over large temporal and spatial scales. They have an efficient flight machinery, demonstrate impressive capacities in storing and burning fuel, and they exhibit necessary orientation and navigational skills. READ MORE
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14. Time and energy in long-distance bird migration
Abstract : Long-distance seasonal migration is energetically demanding and time consuming. For example, some passerine birds are on migration during six months of the year, travel more than 10 000 km and make use of many fuelling sites. Migration requires many different decisions, and an individual bird will face a variety of situations. READ MORE
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15. Spatial Vision in Birds: Anatomical investigation of spatial resolving power
Abstract : Avian eyes are big both in relative and absolute terms, thus the importance of vision to birds is obvious. Even though the general eye plan is rather conservative throughout the group, there is a great variation in visual capabilities. READ MORE