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Color Vision And Color Discrimination In Anolis Sagrei, Rachael A. Singleton
Color Vision And Color Discrimination In Anolis Sagrei, Rachael A. Singleton
Honors Theses
Anolis is a genus of fairly common lizards; over 300 species of Anolis inhabit areas close to the equator. One of their most unique features is the dewlap, a colorful throat fan that the lizards can extend and contract to denote certain behaviors. Dewlap color and pattern varies between species, and therefore aids in species identification. For this reason, color vision and color discrimination is especially important in Anolis lizards. Over a 10-week period a series of training experiments using color markers were done with four lizards of the Anolis sagrei species. The lizards were trained to move a color …
Ontogeny Of Postcranial Morphology And Locomotor Behavior In Propithecus Verreauxi Coquereli And Lemur Catta, Stephanie Ann Wolf
Ontogeny Of Postcranial Morphology And Locomotor Behavior In Propithecus Verreauxi Coquereli And Lemur Catta, Stephanie Ann Wolf
Masters Theses, 2010-2019
Despite living under the same environmental pressures and sympatrically in many cases, Propithecus verreauxi and Lemur catta have evolved very different strategies for survival in stochastic environmental conditions. P. verreauxi show slow somatic growth, low maternal investment, and rapid dental growth while L. catta show faster somatic growth, high maternal investment, and slower dental growth. P. v. coquereli are highly specialized for vertical clinging and leaping (VCL) among lemurs, while L. catta, the most terrestrial of lemurs, use a wider variety of locomotor types including quadrupedalism, climbing, and leaping. P. v. coquereli have unusually long legs and muscular thighs while …
Effect Of Nestling Sex Ratio On The Provisioning Behavior Of Adult Eastern Bluebirds (Sialia Sialis), Barbara Ellen Kieffer
Effect Of Nestling Sex Ratio On The Provisioning Behavior Of Adult Eastern Bluebirds (Sialia Sialis), Barbara Ellen Kieffer
Online Theses and Dissertations
To maximize reproductive success, parents may, in some cases, differentially invest in sons and daughters, i.e., sex-biased parental investment. Preferential provisioning behavior has been reported in one population of Eastern Bluebirds (Sialia sialis) and attributed to local resource competition. To better understand this behavior, I studied the provisioning behavior of Eastern Bluebirds in Madison County, Kentucky, in 2004. I experimentally manipulated brood sex ratios in 24 bluebird nests, creating female-biased (N = 8), male-biased (N = 5), and control (N = 11) nests. Following manipulation, nests were video-taped to record adult provisioning behavior. Among experimental broods, the provisioning rates …