Life Sciences Commons^™

Stressed Out: Life-History Strategy And The Costs Of Multiple Stressors In Gryllus Crickets, Sugjit S. Padda

University of the Pacific Theses and Dissertations

The frequency, duration, and co-occurrence of several environmental stressors are increasing globally. Multiple stressors may have compounding or interactive effects on animals, resulting in either additive or non-additive costs, but animals may mitigate these costs through various strategies of resource conservation or shifts in resource allocation. Thus, through two related factorial experiments, I measured a range of traits—from those related to life history and behavior to underlying physiology— to investigate the nature of costs (additive, non-additive, or neither additive nor non-additive), cost-mitigating strategies (resource conservation or allocation), and life-history strategy related to multiple stressors. First, I leveraged life-history strategy differences …

Courtship And Reproduction In The Bali Mynah, Leucopsar Rothschildi (Aves : Sturnidae), Ann Patterson Marshall

University of the Pacific Theses and Dissertations

Reproductive behavior of captive Bali Mynahs (Leucopsar rothschildi) was studied at the Smithsonian Institution's Conservation and Research Center, Front Royal, Virginia. Courtship and copulation are followed by egg-laying, then incubation, hatching, brooding and feeding, fledging, and feeding. Parents become aggressive toward their young at the start of a new reproductive period, marked by a renewal of courtship.

The female does the majority of the incubation, brooding, and feeding of the young, although the male participates as well. The male performs both the bobbing· display and the crest display more than the female does. During these displays, the crest is prominently …

Communication And Social Behavior Of Captive Slow Lorises (Nycticebus Coucang), Roberta N. Chinn

University of the Pacific Theses and Dissertations

Communication and. social behavior of a prosimian primate, Nycticebus coucang, were studied to gain a better understanding of communication and social behaviors of the Order Primates. Four adult females, two adult males, and one juvenile male were the subjects for the study. The focal animal technique was used to observe communicative and social behavior. Vocal behaviors were sonagraphically analyzed. Probability of occurrence was calculated for all behavior categories observed. Conditional probabilities were calculated for the eight most frequently occurring behaviors in a lag sequential analysis. Results of the probability of occurrence analysis showed that agonistic behaviors occurred rarely or …

Vocal Communication, Nesting, And Territoriality In The California Scrub Jay (Aphelocoma Coerulescens), Nancy Donehue Dodson

University of the Pacific Theses and Dissertations

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