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Browsing by Author "Hawkinson, Anna"

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    Orconectes virilis Body Size and Shelter Preference
    (2012-04-11) Hawkinson, Anna
    Environment preference in terms of light and dark was tested on Crayfish (Orconectes virilis) from Itasca Lake in north central Minnesota. Twelve crayfish were caught from the lake and noted to be either “large” or “small”. Crayfish were individually put into one of two identical enclosures for 5 min. Every 30 sec the location of the crayfish was noted. The enclosures were divided up into four quadrants varying in covered or open and black or white sides/bottoms. Data was analyzed with graphs and chi square tests. Overall, crayfish spent a significant amount of time in the darkest covered quadrant. A significant difference was also found between the frequency of time spent in each quadrant between small and large crayfish; small crayfish remained in the darkest covered quadrant more than large crayfish.
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    The Original Ant-Eaters: The effect of ants on the health of Sarracenia purpurea
    (2012-03-05) Grunzke, Danielle; Hawkinson, Anna; Stedman, Kathryn; Wagener, Jasmine
    Pitcher plants (Sarracenia purpurea), a species of carnivorous plant found in bogs, are often preyed upon by herbivorous insects. A study done by Moon et al. has suggested that ants indirectly deter this herbivory. The relationship between S. purpurea health and presence of ants was investigated by observing ant activity around plants, measuring the contents of pitchers, and recording average height, diameter and color of the plants. We found that plants without signs of herbivory were more likely to have ants in the surrounding area.