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- Abraham, D, et al.
(författare)
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Molecular phylogeny of the subfamilies in geometridae (Geometroidea : Lepidoptera)
- 2001
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Ingår i: MOLECULAR PHYLOGENETICS AND EVOLUTION. - : ACADEMIC PRESS INC. - 1055-7903. ; 20:1, s. 65-77
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Tidskriftsartikel (refereegranskat)abstract
- Molecular sequence data from three gene fragments were used to examine critically a provisional phylogenetic classification based on morphological characters of the Geometridae, one of the most species-rich families of moths. The sister group relationship
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- Göransson, Görgen, et al.
(författare)
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Male characteristics, viability, and harem size in a wild population of pheasants.
- 1990
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Ingår i: Animal Behaviour. - 0003-3472 .- 1095-8282. ; 40:1, s. 89-104
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Tidskriftsartikel (refereegranskat)abstract
- A population of pheasants was studied for 4 years in southern Sweden to determine how sexual selection operates among males. Morphological characters, viability, dominance, territory quality, date of territorial establishment, harem size and reproductive success of males were measured; 81 males and 101 females were radio-tracked. The spur length of males was the most important predictor of harem size. Phenotypic condition and viability were significantly related to spur length, the best single predictor of the reproductive success of males. These are the first data to show that a sexually selected male character correlates significantly with male viability. The results support models suggesting that viability-based processes can contribute to the evolution of mate choice and secondary sexual characters.
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| 4. |
- Madsen, Thomas, et al.
(författare)
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Population size and genetic diversity in sand lizards (Lacerta agilis) and adders (Vipera berus)
- 2000
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Ingår i: Biological Conservation. - 1873-2917. ; 94:2, s. 257-262
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Tidskriftsartikel (refereegranskat)abstract
- Because low genetic diversity may threaten the viability of isolated populations, conservation biologists have devoted much effort to quantify genetic variation. Two techniques routinely used involve levels of mini- and microsatellite polymorphism, with the assumption that levels of variation at these parts of the genome will be reflected in levels of variation at other loci. Our data challenge this assumption. We studied six populations of sand lizards (Lacerta agilis) and five populations of adders (Vipera berus), differing considerably in size and degree of isolation. They, therefore, offer an opportunity to examine how population parameters affect genetic variation at different parts of the genome. Relative population size (based on degree of isolation and number of animals) was not correlated with either minisatellite variability or microsatellite heterozygosity. However, our measures of genetic diversity at the Mhc class I loci of both sand lizards and adders revealed a significant correlation between relative population size and Mhc polymorphism: non-isolated/larger populations exhibited higher genetic diversity than did isolated/small populations. Consequently, only the Mhc-based estimates of genetic diversity yielded results in agreement with population genetic theory. (C) 2000 Elsevier Science Ltd. All rights reserved.
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