Thesis (M.A. in Zoology)--University of California, Berkeley, May 1923. / Includes bibliographical references (leaves i-iii).

Thesis (Ph. D.)--University of California, Davis, 2004. / Cover title. Includes bibliographical references (p. 129-132). Also available via the World Wide Web (Restricted to UC campuses).

Thesis (Ph. D.)--University of Florida, 1984. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 211-224).

In this thesis I discuss (1) the importance of status-age variations in the foraging behavior of individuals within a flock and (2) cultural transmission of foraging information among Gray-breasted Jays (Aphelocoma ultramarina), a cooperative breeder. Results of the experiments suggest that (1) subordinates are less successful in certain foraging situations than dominants, (2) the foraging preferences of young birds are not as defined as those of adults, (3) subadults obtain foraging information from adult flock members, and (4) older subordinates may not change their established preferences as easily as dominants (or younger birds) even when a cost to that preference is introduced. I suggest that, at least in this cooperative breeder, the flock provides a valuable source of environmental information.

No description available.

Diss. (sammanfattning) Uppsala : Univ., 2003. / Härtill 5 uppsatser.

Title from linking web page (University of Missouri--St. Louis, viewed February 16, 2010). Includes bibliographical references.

No description available.

Within natural populations, individuals vary in their propensity to grow, survive and produce offspring. Additionally, fates of individuals are often correlated and non-independent as a result of shared genes, rearing environment or both. Variation in demographic traits can change population dynamics over time. The effects of variation in individual growth rate on population growth rate, net reproductive rate and generation time are examined, along with quantifying the sources of variation in survival of a long-lived cooperatively breeding bird, the Florida Scrub-Jay (Aphelocoma coerulescens). I built a 2 stage population model with two growth phenotypes, fast and slow, and simulated all parameter values using R 3.3.1. Variation in individual maturation rate changes population dynamics, especially in the presence of phenotypic correlation between parents and offspring in growth phenotype. I used Cox Proportional Hazard models with a covariance structure derived from a kinship matrix using the R packages survival and kinship2. Survival of juvenile Florida Scrub-Jays is strongly dependent on kinship, or the degree of relatedness between individuals, in addition to body mass, social structure of the natal territory, natal territory quality and environmental conditions of the rearing period. Breeder Florida Scrub-Jay survival is mainly structured by group size, kinship, yearly variation in environmental conditions and territory quality.

This report evaluates vocal communication, nesting, territoriality, and other social behaviors of the California Scrub Jay.