Natural and Sexual Selection
Natural and sexual selection on many loci.
... Sexual selection due to female choice: two loci: KIRKPATRICK (1 982a) set out a simple model in which natural selection against a male trait is opposed by sexual[r] ...
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Phenotypic plasticity across natural- and sexual-selection gradients in a reef fish
... Positive density dependence (i.e. the Allee effect; AE) often has important implications for the dynamics and conservation of populations. The final aim of this thesis was to examine the interplay between density ...
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Floral traits, pollinator behavior, and plant reproduction: tests of natural and sexual selection in the hummingbird-pollinated herb Chrysothemis friedrichsthaliana
... enrichment. In 1998, Jane enrolled in Cornell University, where she had her first research experience in plant ecology, ornithology, and field biology. Jane also informally studied botanical and wildlife illustration in ...
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Sexual Selection and the Evolution of Human Physique
... 1984). Sexual dimorphism in body composition results in marked sexual dimorphism in body shape (Wells, ...that natural selection has likely been the primary evolutionary cause for ...
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Bozeman Biology: Natural Selection (an overview of natural selection and Hardy-Weinberg Equilibrium) 2
... 20. Guppies are small fish found in streams in Venezuela. Male guppies are brightly colored, with black, red, blue and iridescent (reflective) spots. Males cannot be too brightly colored or they will be seen and consumed ...
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Natural Selection and Material Culture
... of sexual selection and costly signaling to account for peacock fitness, which is advertised by their elaborate ...positive selection for more elaborate ...
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Sexual selection and the evolution of beauty: two views
... “basal papilla,” tuned to 2200 Hz, even though only tungara frogs add chucks (averaging 2500 Hz) to their whines. Since the basal papilla is tuned to 2200 Hz, females can hear deeper, lower-frequency chucks more easily. ...
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Sex chromosomes and sexual selection in poeciliid fishes
... These extensive studies using crossover rates and ped- igree analysis of male coloration genes to map guppy sex chromosomes provide only an approximate picture of the linkage patterns of attractive characters in ...
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Evolutionary Ecology of Sexual Selection in Bahamian Mosquitofish.
... of sexual selection ...of sexual selection systems whereby natural selection acts on trait elaboration directly via male viability selection, as well as indirectly via ...
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Darwin's Explanation of Races by Means of Sexual Selection
... of natural selection or the survival of the ...that natural selection had been the chief agent of change, though largely aided by the inherited effects of habit, and slightly by the direct ...
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On the unfitness of natural selection to explain sexual reproduction, and the difficulties that remain
... e natural w orld as they provide a fram ew ork to explain th e existence o f biolo g ical p h e n o m e n a in a n a tu ra lis tic c o n te x t (M o n ta le n ti ...
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An Experimental Demonstration of Fisher's Principle: Evolution of Sexual Proportion by Natural Selection
... of sexual proportion is a major bio- logical ...have sexual proportions around 1:1; the explanation of this phenomenon eluded Dar win himself, who concluded that “the whole problem is so intricate that it ...
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On the Unit of Selection in Sexual Populations
... of selection on alleles and com- binations of alleles, but here we are concerned (for the most part) with nucleotides and combinations of nucleotides ...cases selection on individual nucleotides may be ...
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SEXUAL PLANTS WITH HIGH CHROMOSOME NUMBER FROM AN INDIVIDUAL PLANT SELECTION IN A NATURAL POPULATION OF GUAYULE AND MARIOLA
... Since one sexual plant has been described in mariola (POWERS and ROLLINS 1945) and members of collection 42418 show evidence of hybridity between mariola and guayule ([r] ...
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Postcopulatory sexual selection
... pre-insemination sexual selection is the fact that post-insemination mechanisms might not generate directional ...with selection act- ing on different male genotypes and might contribute to the ...
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Natural Selection
... The frequency, proportions, and plotting parts of the components could serve as a check for understanding (i.e., formative assessment) of the math standards, and students may need to revisit these skills to successfully ...
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Sexual selection and sex allocation
... that sexual selection is inherently weaker in simultaneous hermaphrodites than in species with separate sexes, but this claim has received little formal ...
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Sexual selection and trust games
... such sexual display is ...long-term sexual partners both sexes emphasise items such as mutual attraction, being dependable, emotional stability and kindness, however there are sex ...
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Natural Wine Selection
... Le Pitrouillet Domaine Clement Barau Savennieres Loire, France Bourgogne Chardonnay Les Parcellaires de Saulx, France Est Ouest Domaine Thomas et Jean Daniel Ardeche Rhone, France. Bou[r] ...
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Natural and artificial selection
... 2 Artificial selection has been carried out for thousands of years. An example of this is the Santa Gertrudis breed of cattle, which grow fast and tolerate high temperatures and high humidity. This breed was ...
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