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.
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Showing 1 to 20 of 21 for “"natal dispersal"”.
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Natal dispersal and first-year survival in a neotropical migratory songbird
… to return to breed at great distances from their natal location, the factors that influence first-year survival have not been thoroughly investigated. To examine the factors that affect first-year survival, I determined the distribution of natal dispersal distances in Prothonotary Warblers …
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Factors Affecting Natal Dispersal by Song Wrens (Cyphorhinus Phaeocephalus): Ecological Constraints and Demography
… birds. Second, I documented patterns of delayed dispersal of Song Wren offspring. Song Wren males typically delay dispersal much longer than do females. Two hypotheses proposed to explain the evolution of delayed dispersal in birds were tested using data from both naturally-occurring and …
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Social Organization, Natal Dispersal, Survival, and Cause -Specific Mortality of Red Foxes in Agricultural and Urban Areas of East-Central Illinois
… larger litters, low capture body fat, and fewer dispersal days had higher survival. Adult survival (0.35) was higher than juvenile survival (0.24). Yearly urban survival varied due to cyclic outbreaks of sarcoptic mange, resulting in survival ranging from 0.10 (mange prevalent) to 0.83 (no mange) …
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Should I stay or should I go? Hormonal and demographic correlates of natal dispersal in a population of wild vervet monkeys
Natal dispersal is an important maturational milestone in the life of many primates and is associated with changes in the physical and social environment. To integrate into an unrelated group, an individual must abandon its known environment and face various challenges which can often be costly. …
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Intrabrood Dominance Hierarchies in Juvenile Red-Cockaded Woodpeckers: The Role of Early Social Environment On Post-Fledging Survival and Natal Dispersal
… environment prior to fledging influenced male dispersal decisions and subordinates delayed dispersal in the spring in situations where all dominants died over the winter. The probability of delayed dispersal in females was higher for females raised without brood-mates in one of two populations …
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Female Dispersal and Inbreeding in the Red-cockaded Woodpecker
Dispersal is a critical life-history component; it determines gene flow and has profound effects on population structure, demography, social systems, and population viability. To add to our knowledge of dispersal and, in particular, our understanding of the relationship between dispersal and …
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Determinants of variation in productivity, adult survival and recruitment in a declining migrant bird : the Whinchat (Saxicola rubetra)
… apparent survival could partly be explained by natal dispersal, which was greater than breeding dispersal. From the reproductive output, survival and recruitment quantified in this study, it is apparent that the Salisbury Plain population is not currently self-sustaining.
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Ecology of the tawny owl <i>Strix aluco</i> in the spruce forests of Northumberland and Argyll
… had a high annual survival (84-85%). The median natal dispersal distance was 3.05 km for both males and females, with 30% settling to breed no more than two territories from where they were reared, although none bred in its natal territory. About 80% of chicks recruited into the breeding …
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Extraterritorial prospecting and territory defence in cooperatively breeding meerkats
In group living animals where natal dispersal is delayed, prospecting allows individuals to asses their future dispersal and breeding opportunities and, in males of some species, may minimize the costs of delaying dispersal by enabling extra-group breeding while still resident in the natal group. …
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Mister Parid's Neighborhood: Dispersal Behavior and Flocking Dynamics of the Social Black-crested Titmouse (Baeolophus atricristatus)
… family flocking groups due to delayed juvenile dispersal each summer. A recently elevated species, separated from its sister-taxon, the tufted titmouse (Baeolophus bicolor), the BCTI is an ideal model species for studying family-flocking dynamics. The three goals of my project were to: (1) …
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Ecology of Greater Sage-Grouse in the Dakotas
… and estimating the timing and distance of natal dispersal by juvenile sage-grouse. I collected 6,072 locations from 219 (97 females, 54 males, 68 juvenile) radio-marked sage-grouse, documented 89 seasonal migrations (21 in ND, 68 in SD) and 158 instances of non-migratory behavior (73 in ND, …
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Navigating the night: spatial cognition, locomotor and ranging behaviour in Nycticebus species
… translocations I analysed long-term data on natal dispersal in the Javan slow loris. I found that both males and females disperse as late as two years after birth. Offspring development and dispersal is rooted in the social interactions between family group members. The skills they acquire …
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Investigating the foraging ecology of black guillemots Cepphus grylle in relation to tidal stream turbines and marine protected areas
… Using ring recovery data, I investigated natal dispersal and philopatry across Britain and Ireland, as metapopulation dynamics may have implications for colony recovery. These properties were found to vary with latitude, potentially related to regional environmental conditions.<br/>In …
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Incubation behavior and dispersal patterns in the Mountain Plover (Charadrius montanus)
… opportunity to examine sex differences in natal and breeding dispersal. I used nest locations from a breeding population of plovers in north-central Montana over a 13-year period (1995-2007) to examine patterns of sex bias in their dispersal. Additionally, I looked at the influence of prior …
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Post-release movements of translocated White-tailed eagles (Haliaeetus albicilla) during the first year of juvenile dispersal
… to investigate the initial stages of juvenile dispersal and post-release movements of translocated WTE, using satellite telemetry, from release, up until the end of their first year. Data was utilised from nine birds from two groups during analysis (Cohort 1 and Cohort 2). The aim of this …
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Behavior and Ecology of Wild Slow Lorises (Nycticebus coucang): Social Organization, Infant Care System, and Diet
… together with relatively small testis volume and natal dispersal occuring in both sexes, hints towards a monogamous mating system. In one case an extended family group formed by delayed dispersal of a primary pair's offspring. Friendly interactions among group members included allogrooming, …
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Living apart together
… therefore, explain why parents tolerate delayed natal dispersal despite a negative effect on actual female reproductive success. In conclusion, the present study successfully applied existing socio-ecological theory to a new area of research, refined a recent evolutionary model and contributed …
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Behavioral ecology of the Colorado brown tarantula (Aphonopelma hentzi): Activities displayed around the burrow through juvenile group dispersal
… silk egg casing before they disperse from the natal site. In the additional study reported in Chapter 5, I describe the first days post-emergence and, ultimately, the group dispersal processes of juveniles. This work provides foundational knowledge towards these particularly understudied …
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Molecular ecology and hierarchical models elucidate chronic wasting disease dynamics
… This suggests that neither breeding sites nor natal dispersal are the primary means of disease spread in females across the winter ranges. Furthermore, we found, as previously reported, that an individual deer's Prnp genotype predicts the likelihood of a positive disease test. Even so, the …
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