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Life cycles of benthic insects in Lapland streams (Ephemeroptera, Plecoptera, Trichoptera, Diptera Simuliidae)
A large material of larvae and nymphs of Ephemeroptera, Plecoptera, Trichoptera and Diptera Simuliidae from lotic biotopes in Lapland streams was used for an analysis of life cycle patterns.Expand
Biometry, habitat distribution and breeding success in the Pied Flycatcher Ficedula hypoleuca
TLDR
The size-related assortment of individuals upon the two habitats was interpreted as the outcome of competitive interactions and the lower reproductive success in the less preferred habitat are in accordance with Fretwell's ideal despotic distribution model. Expand
Niche Differentiation during Winter in Woodland Birds in Southern Sweden and the Island of Gotland
TLDR
Although the bird species constellation differed between the mainland and Gotland, certain feeding stations were equally visited by birds in both areas and represents a case of ecological release due to relaxed competition on the island. Expand
The Conflict Between Male Polygamy and Female Monogamy: The Case of the Pied Flycatcher Ficedula hypoleuca
TLDR
It is contention that, in the "battle between the sexes," the male sex is relatively victorious in the pied flycatcher as compared with most altricial bird species which are strictly or almost strictly monogamous. Expand
LACUSTRINE SESTON AND OTHER FACTORS INFLUENCING BLACKFLIES (DIPTERA SIMULIIDAE) INHABITING LAKE OUTLETS IN SWEDISH LAPLAND
The blackfly (Diptera: Simuliidae) assemblages of three localities in a river system in Swedish Lapland were examined. One locality was at a lake outlet, one further down in the same river and one inExpand
Hybridization as an Agent of Competition between Two Bird Allospecies: Ficedula Albicollis and F. Hypoleuca on the Island of Gotland in the Baltic
TLDR
It is suggested that this may prevent F. hypoleuca from building up a large and viable population and thereby to outcompete F. albicollis from its only bastion in NW Europe, i.e. the Baltic islands, where it is probably a relict from a period with circumstances more favourable than at present. Expand
Microdistribution of benthic species (Ephemeroptera, Plecoptera, Trichoptera, Diptera: Simuliidae) in Lapland streams
TLDR
Benthic species select their habitats on the basis of factor combinations, rather than isolated factors; in this interplay of environmental factors food was found to have a dominant influence in the biotope investigated. Expand
Food resources and breeding frequency of the harlequin duck Histrionicus histrionicus in Iceland.
In four rivers in northern Iceland, benthic standing crop values were lower in 1970 than normal. There are strong indications that the abundance of simuliid larvae, pupae and adults was much belowExpand
Predation on birds' nests in relation to antipredator aggression and nest density: an experimental study
TLDR
A significantly lower frequency of predators over this study plot than the others was recorded, and the rate of predation on the artificial nests in this plot was also significantly lower. Expand
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