Global ETD Search
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Showing 1 to 12 of 12 for “"Mating Frequency"”.
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Temporal profile of gonadal steroids in populations of roosters divergently selected for mating frequency
… correlations was observed among the high mating line suggesting these animals have a more uniform hormonal state throughout development as opposed to the low mating line. Packed cell volume and body weight measurements were obtained at the termination of the experiment. Significant …
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Environmental and social influences of foraging behaviour and maternal investment with a note on the mating frequency of the eastern carpenter bee, Xylocopa virginica
… costs of brood production, and that multiple mating contributes to low-group relatedness and non-kin sociality in the Eastern carpenter bee, Xylocopa virginica. In Chapter 2, using a natural experiment which included a drought and three normal weather years, we found that mothers foraged more …
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Genetic analyses of reproductive behavior in the domestic fowl and the Japanese quail
… of divergent selection for high and low mating frequency and the random bred control population from which the selected lines originated. In the first experiment, fertility comparisons under natural and artificial mating situations were made over time among male chickens from the selected …
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The effect of social condition and diet on the frequency of male-male agonistic displays in the field cricket, gryllus bimaculatus /
The frequency and type of agonistic displays involved in male-male encounters should be significantly influenced by the presence of females. Discrete agonistic displays vary in energy expenditure and risk, and therefore should be dependent on available resources. The influence of live females and …
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Androgen aromatization and cytosol estradiol-receptors in the mediation of masculine sexual behavior in Japanese quail
… quail selected bi-directionally for adult mating frequency. Experiments were conducted with brain tissues from functionally castrated, High (HM) and Low Mating (LM) line quail to compare (1) the in vivo aromatization of ³H-testosterone and (2) cytosolic estradiol-binding by in vitro …
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An investigation of the sociogenetic structure of the endemic fynbos ant, Camponotus klugii, via the use of microsatellites
… to colony organization, queen number, queen mating frequency, levels of relatedness and worker reproduction. Within this study I perform an analysis on two groups of ant nests of the species Campo notus klugii, in order to investigate how the genetic structure may inform us of the …
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Behavior of wild-type and laboratory-adapted cabbage loopers, Tr̲ich̲o̲pl̲u̲s̲i̲a n̲i (Hübner) (Lepidoptera:Noctuidae)
… resulted in a decline in adult fecundity and mating frequency. It is postulated that stress to the larvae resulted in a decline in energy sources to be used in the adult stage, producing docile adults.
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The adaptive significance of multiple mating by males in the polygynandrous waterstrider Aquarius remigis (Heteroptera: Gerridae)
… the relationships among paternity success, mating success (proportion of matings resulting in sperm transfer) and duration of copulation for males of the polygynandrous waterstrider Aquarius remigis . Prolonged copulation is characteristic of this species and has been interpreted as a …
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Experimental studies on the reproductive biology of the Waterstrider, Gerris buenoi (Heteroptera: Gerridae)
… and reproductive rate advances its onset. The mating behaviour of G. buenoi was studied with a series of laboratory experiments and field observations. Mating is multiple, females are reluctant, males persistent and mating consists of a period of copulation followed by a guarding phase. Mating …
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The movement behavior and reproductive ecology of western corn rootworm beetles (coleoptera: chrysomeliae) in Bt cornfields with structured and seed blend refuges
… beetles that survived Bt exposure. These “mixed-matings” are expected to produce heterozygous Bt susceptible offspring, delaying resistance because few resistant individuals will have opportunities to mate and produce homozygous Bt resistant offspring. Because the efficacy of the rootworm refuge …
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Paarungshäufigkeit und Aufteilung der Reproduktion bei Pachycondyla villosa
In Ameisensozietäten treten häufig Konflikte um die Reproduktion auf. Um dabei das soziale Verhalten der beteiligten Individuen und die Koloniestruktur zu verstehen ist es wichtig, die Verwandtschaftsstruktur innerhalb der Kolonien zu kennen. Diese wird durch die Paarungshäufigkeit der Königinnen, …