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Academic Journals
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From:Evolution (Vol. 50, Issue 1) Peer-ReviewedStatistical analyses of natural and sexual selections in wild populations are often hampered by the difficulty in measuring true life-time fitness of multiple individuals. As an indicator of total fitness, researchers...
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From:Evolution (Vol. 52, Issue 1) Peer-ReviewedThe significance of body size differences to premating isolation between two sympatric sticklebacks was examined. The species varied greatly in size and several lines of evidence showed that this difference is an...
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From:Evolution (Vol. 48, Issue 3) Peer-ReviewedBreeding competition in Oncorhynchus kisutch was investigated to determine its influence on breeding morphologies and dimorphism. The results showed that when competition was absent, natural selection only affected...
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From:Science (Vol. 292, Issue 5517) Peer-ReviewedIn many bird species, the sexes are morphologically distinct. Often this dimorphism is the result of sexual selection, but in some cases natural selection has acted to reduce competition between the sexes for food or...
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From:Science (Vol. 289, Issue 5487) Peer-ReviewedMulticellular organisms use the products of highly polymorphic genes to distinguish self from conspecific nonself cells or tissues. These allorecognition polymorphisms may regulate somatic interactions between hosts and...
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From:Evolution (Vol. 51, Issue 6) Peer-ReviewedA complete generalization of various natural selection models is proposed using the Price Equation which represents an exact description of evolutionary change. The Price Equation puts together the results from previous...
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From:Evolution (Vol. 49, Issue 1) Peer-ReviewedMethods for estimating the mean fitness of organisms were developed. Estimates were obtained by comparing the mean fitness of selected and unselected populations directly and by measuring the variance of fitness using...
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From:Evolution (Vol. 49, Issue 3) Peer-ReviewedMale-to-male antagonism and weaponry among subsocial spider mites found in Japan are investigated. The results show that aggressiveness is highly variable and is related to the mean winter temperature. Aggressiveness is...
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From:Evolution (Vol. 49, Issue 1) Peer-ReviewedCytogenetic analysis of the effects of fission heterozygosity in hybrid and backcross genotypes of the two chromosome races of male lizards of the Sceloporus grammicus complex revealed trivalent formation and...
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From:Evolution (Vol. 50, Issue 5) Peer-ReviewedRubyspot damselflies (Hetaerina americana) were studied to measure selection on secondary sexual characters. The male of this species have large red spots on each wing that grows in size following sexual aging. Results...
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From:Evolution (Vol. 50, Issue 2) Peer-ReviewedSocial selection refers to the selective force that is influenced by individual changes in social behaviors, which, in turn, result from signals that are meant to influence fitness in other individuals. A...
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From:The Monist (Vol. 85, Issue 1) Peer-Reviewed1. Background The extravagant crests, tails, colors, and songs of many animals, particularly males, have long puzzled evolutionary biologists. The peacock's colorful tail is a classic example. This tail, which can...
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From:Victorian Studies (Vol. 37, Issue 2) Peer-ReviewedCharles Darwin's 'The Descent of Man and Selection in Relation to Sex' provides evidence of the fallacies arising from interpreting contemporary social norms as historically established biological norms. Darwin and...
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From:Evolution (Vol. 50, Issue 2) Peer-ReviewedIntrasexual and intersexual selection in the eastern black swallowtail butterfly is investigated. Sibling males are used, with the appearance of one being altered to make it resemble a mimetic female. After being...
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From:The Brown University Psychopharmacology Update (Vol. 23, Issue 12)Astudy assessing the efficacy of disulfiram (Antabuse) in the treatment of cocaine dependence has found that response to the medication differed by subject genotype, suggesting that pharmacotherapy for cocaine addiction...
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From:PLoS ONE (Vol. 8, Issue 4) Peer-ReviewedAuthor(s): Aristeidis Parmakelis 1,*, Panayiota Kotsakiozi 2, David Rand 3 Introduction MtDNA loci are the most commonly used markers in molecular studies of animal populations [1]. Studies involving the genetic...
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From:PLoS ONE (Vol. 8, Issue 6) Peer-ReviewedAuthor(s): Mariana F. Nery 1,2,*, Dimar J. González 1, Juan C. Opazo 1,* Introduction A central goal in evolutionary biology is to understand the relative contribution of the different evolutionary forces in the...
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From:Nature (Vol. 486, Issue 7402) Peer-ReviewedSelection against aggression seems to have occurred naturally in some animals and to have led to traits similar to those seen in domesticated animals. The bonobo (Pan paniscus) is less aggressive and more sociable than...
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From:Evolution (Vol. 47, Issue 5) Peer-ReviewedA study has been conducted to investigate the role of selection in genetic evolution by examining the phylogenetic relationships between species. A maximum-likelihood estimate using a k-allele model was used to analyze...
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From:Evolution (Vol. 50, Issue 6) Peer-ReviewedThe male cricket calling song functions as a mating call for females and is the primary mode of sexual selection. Tests involving the Oecanthus nigricornis indicated that song had a positive correlation with male size...