bboard - 1 Effect of species on mobility of female crickets...

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1 Effect of species on mobility of female crickets Effect of species on mobility of female crickets The house cricket Acheta domesticus differs from the conventional sex roles imparted in crickets. In a laboratory investigation, the researchers discovered that female house crickets have no preference for location when exposed to the calling song of a male cricket. Female house crickets were walking in circles around the observational arena, which delineated that the environment had a key role in the selection of female crickets for males. The research focused on whether the calling song from males of a different species will change the behavior of female house crickets. Because only female crickets have an ovipositor, the researchers experimented whether the length of the ovipositor guided the female cricket toward the stimulus of the calling song. Thus, the researchers believed external signals on the cricket changes in length upon the stimulus of the call song. Introduction The house cricket, Acheta domesticus , exhibits a diverse range of communication between the male and female species. Female crickets are attracted to the sound of male crickets (Rillich 2009). Although male crickets display aggression behavior to attract female crickets, research into how female crickets respond to the male crickets remain limited in scope. Female aggression in the cricket Gryllus campestris exists; the females defend their burrow against other female crickets (Rost & Honegger 1987). Previous experiment has shown that female crickets aggressively compete for food under starvation (Nosil 2002). Therefore, the current research will examine whether females prefer spending time closer or farther away from the source of the male calling sound. Because the calling song of the male crickets attracts female crickets by evoking phonotaxis, the experiment will evaluate whether phonotaxis apply to females in the species
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2 Archeta domesticus . Different species of crickets show different responses to the opiate antagonist naloxone (Dyakonova et. al. 2002) in regards to aggressive behavior. Thus, the behavior of females towards phonotaxis may be different than established results suggest. The Wilcoxon rank test is a measure of statistics that assesses whether the female cricket has a preference for either segments of an observation area. The amount of time the female cricket spends in each segment of the observation area will be recorded for three minutes. Methods and Materials Female Aceta domesticus crickets were kept in a plastic container which housed around thirty female house crickets. During the experiment at the University of Texas at Austin, the crickets were stored under standard conditions of twenty-two to twenty-five degrees Celsius (room temperature). The interactions between the cricket and the speaker projecting the male calling songs were staged in a cylindrical arena fashioned from laminate flooring. The top of the observation arena was ventilated to the open air. As a measure of the preference the female
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This note was uploaded on 09/15/2011 for the course BIO 206L taught by Professor Unknown during the Spring '08 term at University of Texas at Austin.

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bboard - 1 Effect of species on mobility of female crickets...

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