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Förskolebarns lek- lek eller allvar?
, 2006 Abstrakt Arbetets art: Examensarbete, 10p Institution: Institutionen för pedagogik och didaktik vid Göteborgs Universitet Antal sidor: 31 Titel: Förskolebarns lek – lek eller allvar? En intervjustudie av pedagogers syn på lekens betydelse för förskolebarns utveckling och lärande.
Smith, Hanna, Järkås, Jenny
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On the resolution of the lek paradox
Trends in Ecology & Evolution, 2008Directional female mate choice is expected to deplete additive genetic variation in male traits. This should preclude such trait-based choice from resulting in genetic benefits to offspring, and yet genetic benefits are the explanation for the choice. This evolutionary conundrum is known as the lek paradox.
Janne S, Kotiaho +3 more
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Leks of leks: a role for hotspots in lek evolution?
Proceedings of the Royal Society of London. Series B: Biological Sciences, 1994A lek is a cluster of males on display territories. Despite the attention that lek mating systems have received, the factors involved in lek evolution are still poorly understood. The ‘hotspot’ hypothesis suggests that population level patterns of female movement and/or dispersion determine male settlement patterns.
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Trends in Ecology & Evolution, 1991
In lek-breeding animals, males defend tiny territories clustered into arenas, where females come to mate. Typically, most lek males secure relatively few copulations while a small number are highly successful. Recent studies suggest that the skewed distribution of matings seen at leks may be the result of females using a variety of criteria to select ...
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In lek-breeding animals, males defend tiny territories clustered into arenas, where females come to mate. Typically, most lek males secure relatively few copulations while a small number are highly successful. Recent studies suggest that the skewed distribution of matings seen at leks may be the result of females using a variety of criteria to select ...
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Lek size, male mating skew and the evolution of lekking
Nature, 1995DESPITE extensive theoretical effort1–8, the evolution of lekking as a mating system remains a controversial issue9,10. Leks are non-resource-based mating aggregations2, but may also be regarded as patches differing in female encounter rate2, 3, 5, 7. We report here a new distribution model that incorporates variation in male mating skew with lek size.
Fredrik Widemo, Ian P. F. Owensi
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Towards a resolution of the lek paradox
Nature, 2001Genetic benefits in the shape of 'good genes' have been invoked to explain costly female choice in the absence of direct fitness benefits. Little genetic variance in fitness traits is expected, however, because directional selection tends to drive beneficial alleles to fixation. There seems to be little potential, therefore, for female choice to result
J S, Kotiaho, L W, Simmons, J L, Tomkins
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Size and stability of vertebrate leks
Animal Behaviour, 1999Lek size varies greatly among lekking species. At present there is no explicit theoretical explanation for this diversity. We extend an existing model of optimal lek size that incorporates female mating preferences and male-male contest competition. The model shows that variation in lek size is predicted by the interaction between lek size, overall ...
Widemo, Fredrik, Owens, Ian P. F.
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2020
This chapter tackles the major works that brought Ivan Turgenev's most fertile period to a close: On the Eve , First Love , and Fathers and Children . It gives a detailed summary of the three novels, and discusses
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This chapter tackles the major works that brought Ivan Turgenev's most fertile period to a close: On the Eve , First Love , and Fathers and Children . It gives a detailed summary of the three novels, and discusses
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Male Lekking duration and Mating Benefits in a Lek-Forming Hawaiian Drosophila
Journal of Insect Behavior, 2001Uploaded by Plazi for TaxoDros. We do not have abstracts.
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