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House Cricket Experiment

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House Cricket Experiment

Introduction The topic of house cricket aggression in response to residency has been previously studied. (Alexander 1961) split this aggression behavior into five levels: 1) no aggression, dominance, or retreat; 2) no aggression with a retreat by one cricket; 3) mild one-sided aggression with mild repercussion; 4) moderate to intense aggression from both crickets; or 5) sustained combat. Interestingly, in Polistes wasps (Pardi 1948a), Sphecius wasps (Mr Norman Lin, personal communication), and crayfish (Bovbjerg 1953; Lowe 1956) aggressive behavior has been split into four or five levels. (Alexander 1961)
The experimental organism in this experiment was Acheta domesticus, more commonly known as the house cricket. Acheta domesticus (Linnaeus) is a species distributed by man. It was considered native to Europe but may have come from northern Africa or Southwest Asia according to Ghouri (1961). Both Blatchley (1920) and Alexander (1957) have reported it in the eastern United States. (Weissman and Rentz 1977)
The purpose of the house cricket experiment was to answer the question: “Does residency affect a male cricket’s motivation in pair-wise interactions with other male crickets?” The hypothesis was “male crickets that are resident in a territory have greater motivation to defend their territory”. The prediction was if male crickets that are residents in an artificial territory are challenged by introduction of an intruder, they will win more aggressive encounters more than will intruders. Also, (Buena and Walker 2008) predicted that resident male crickets will be more likely to win when the area contains resources of high value. The dependent variable being tested in this experiment was the contest outcome, or which cricket wins or loses. The independent variable was which cricket is chosen to be the intruder and which is chosen as the

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