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Capstone Projects

The Response of Captive Gray Wolves (Canis lupus) to Agonistic Howl Recordings

Thu, 12/05/2013 - 18:58
Abstract: Gray wolves (Canis lupus) are a highly social carnivore that communicates through olfactory and acoustic signals, maintaining their social bonds and hierarchy with body language and touch. Long distance (i.e. howling) and olfactory communication are important in maintaining territory boundaries and mitigating interpack conflict or strife. The study area is a private, not-for-profit wolf conservation and education center in southern New York in the northeast United States. The goal of this study was to determine the overall change in behavior of wolves when faced with a long distance form of communication conveying an aggressive message. I hypothesized that wolves will respond with more activity during and after the howl recordings. An ethogram was adapted from Quandt, but upon personal observation, was altered as additional behaviors were observed. Instantaneous focal sampling was used during data collection at an interval of 15 seconds to sample two gray wolf siblings. The behaviors between wolves were not significantly different from each other (chi square = 0.86, critical value = 14.07, df = 6). This information has many management implications such as determining home range of packs, pack size, and could serve as a possible tool for deterring predation on livestock.
Access: Yes
Literary Rights: Off
Major: Fisheries and Wildlife Science
Year: 2013
File Attachments: Write-Up.docx
Authors: Erin Brinton

Perception of the Color Blue in North American River Otters, Lontra canadensis

Fri, 12/06/2013 - 11:41
Abstract: Color vision is essential to many animal species, playing major roles in activities such as foraging and mate selection. Most animal phyla have 4 cones that aid in color vision, while mammals typically only have 2. This study aimed to provide evidence of the blue-range color vision in North American river otters, Lontra canadensis, by behavioral testing 4 captive otters. The subjects (2 male and 2 female adults) were tested individually over a period of 42 weeks. Each otter was presented with 3 cards, with choices between 2 white control cards and a blue test card (n = 1213). In later tests, all subjects were presented with 1 white control card, 1 blue test card, and 1 gray card (n = 417). All subjects distinguished the blue test card from the white control cards but only 1 subject differentiated the color blue from a grayscale correspondent (One-proportion z-test, p = 0.011). A bias based on card location was present only in 1 subject in the blue-white phase of testing (One-proportion z-test, p = 0.201) and in 3 subjects in the blue-grey phase of testing. The cause of this bias was unknown. The ability of 1 subject to reliably select the test card (One-proportion z-test, p = 0.011), provided some evidence that L. canadensis perceive the color blue.
Access: Yes
Literary Rights: Off
Major: Fisheries and Wildlife Science
Year: 2013
Authors: Chelsie LaFountain