Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 21 for “"kin selection"”.
-
Computer simulations of kin selection
The theory of kin selection is central to the understanding of social evolution. Recent theoretical work suggests a limitation on the action of kin selection in structured populations. The first such limit involves a specialized population structure, termed "budding viscosity," common to social …
-
Factors influencing the space use of a nonhunted population of eastern wild turkeys
… looked for evidence of cooperative courtship and kin selection operating in this population. I used dynamic Brownian Bridge Movement Models to estimate daily and seasonal ranges. Median daily mating season ranges of 100 percent of males were larger than median daily non-mating season ranges, and …
-
Paternity and father-offspring relationships in wild chimpanzees, Pan troglodytes schweinfurthii.
Hamilton's seminal theory of kin selection asserts that because relatives share a certain proportion of genes, individuals can increase their inclusive fitness by helping and/or not harming kin, as long as the benefits to kin outweigh the costs to the individual. We would expect animals to attain …
-
Kin and social network structure in two populations of Octodon degus
… that individuals of some species live in non-kin groups suggests kin selection is not required in all species for sociality to evolve. Here I investigate two populations of Octodon degus, a South American rodent which has been shown to form kin and non-kin groups. I quantified genetic …
-
Evolutionary Origin and Maintenance of Sociality in the Small Carpenter Bees
… cooperation among conspecifics: mutual benefit, kin selection and manipulation. Lifetime reproductive success calculations revealed that mutual benefit does not explain social behaviour in this group as social colonies have lower per capita life time reproductive success than solitary nests. …
-
Determining parentage and the effects of relatedness on play partner preference in Belding's ground squirrels
… with sisters, and especially full sisters since kin selection favors cooperation with full sisters over half-sisters. However, my data did not support this hypothesis. Juvenile females demonstrated no preference for interacting with full versus half-sisters in play or other social behaviors. By …
-
Playing with Relatives: Genetic Kinship and Play Behavior in Juvenile Tibetan Macaques
… between player age, player sex, genetic kinship and social play duration in juvenile Tibetan macaques.</p> <p>Chapter I provides a general introduction and addresses current and past literature on the behavior, ecology and play among macaque genera and Tibetan macaques within this study. …
-
Social interaction and dispersal patterns of golden snub-nosed monkeys (Rhinopithecus roxellana) living in multi-level societies
… gain from group living and the role of kin and nonkin affiliation and cooperation in the formation of social networks in primates by investigating the multi-level social structures exhibited by Sichuan snub-nosed monkeys (Rhinopithecus roxellana). The multi-level social network of …
-
Co-operation and conflict in societies of the ponerine ant genus Pachycondyla
… the evolution and maintenance of social life (kin selection theory, Hamilton 1964a,b). Not only kin selection itself, but also more complex evolutionary theories make predictions on the occurrence of conflict and co-operation in animal societies. They all depend on the genetic relationships …
-
Proximate and ultimate factors influencing honey bee reproductive-related behavior
… in bees. In queenless colonies, the loss of kin structure that accompanies the loss of the queen leads to workers developing their ovaries and laying their own eggs. I found that even though queenless workers invest in their own reproduction as kin selection theory would suggest, they do not …
-
'Better Make It a Double': Perceived Relatedness Increases Reported Attractiveness
<p>Sexual selection shaped psychological mechanisms in both sexes to assess potential mates for evidence of mate quality (Buss, 2005). Attraction preferences are one such mechanism (Sugiyama, 2005) and physical attraction preferences are sensitive to fitness-promoting traits present in a potential …
-
Dominance, social organisation and cooperation in the sociable weaver (Philetairus socius)
… of hierarchies, and may act in concert with kin selection, enforcement or signalling mechanisms to promote cooperation. Yet, the significance of dominance in the evolutionary routes that maintain cooperation remains poorly understood (Chapter 1). Sociable weavers Philetairus socius are highly …
-
Behavioural ecology of the Redbilled Woodhoopoe Phoeniculus purpureus in South Africa
… reproductive behaviour reflects environmental selection pressures, in the form of roost-cavity availability, with a reduction in cavity availability leading to increased group size. The group-territorial social system and high level of inbreeding of Redbilled Woodhoopoes have evolved primarily …
-
Polymorphic social organisation in a eusocial insect : the ultimate and proximate causes
… monogynous Spanish population by undertaking behavioural observations and experiments. In contrast to what is assumed by the majority of skew theory - that control lies with individuals in direct competition over reproduction (queens) - I show that a third party (the workers) plays a …
-
Differentiation in reproductive potential and chemical communication of reproductive status in workers and queens of the ant Myrmecia gulosa
… fertility has found an explanation in the kin selection theory: workers can overcome the cost of helping and of forgiving direct reproduction by rearing sufficiently related individuals. However, in the Hymenoptera, little is known on the proximate mechanisms that regulate the division of …
-
Social structure, individual fitness and the effect of climate in an obligate cooperatively breeding bird, the white-winged chough (Corcorax melanorhamphos)
… relatedness to the group as an indication of kin selection. I found that in most groups, unrelated adult choughs of the opposite sex show strong associations, and discuss how this probably reflects the importance of inbreeding avoidance within chough groups. I did not find that relatedness was …
-
Social structure, individual fitness and the effect of climate in an obligate cooperatively breeding bird, the white-winged chough (Corcorax melanorhamphos)
… relatedness to the group as an indication of kin selection. I found that in most groups, unrelated adult choughs of the opposite sex show strong associations, and discuss how this probably reflects the importance of inbreeding avoidance within chough groups. I did not find that relatedness was …
-
Non-canonical sensing mechanisms in bacteria
… calorimetry (ITC) and the in vitro receptor-kinase assay. Chemotaxis to DNA is dose-dependent. Among the organisms tested, Bacilli are the preferred sources of DNA. McpC is the sole chemoreceptor for DNA. Using SELEX-Seq, we identified a number of chemotactic DNA motifs. The abundance of …
-
Evolution of Altruism and Eusociality: Toward a Cost/Benefit Analysis of Fitness and Genetic Relatedness
… to Darwin’s theory of evolution by natural selection on individual fitness. Altruistic behaviors are commonly performed in eusocial animals, such as nearly all hymenoptera (including bees, wasps, and ants), termites, ambrosia beetles, and so on. Inclusive fitness theory predicts that …
Page 1 of 2