This study examined the effect of different periods of food deprivation on resting metabolic rates (RMR) and foraging activities in tarantulas (Phormictopus cancerides). Juvenile tarantulas were separated into two feeding groups and fed once either every 5 or 30 days. Monthly feeding trials were preceded by RMR measurements. During feeding trials I compared differences between the two groups in (1) prey capture rates, (2) time to prey capture, (3) locomotory activity, and (4) the predator’s prey detection distance. RMRs increased for the well-fed group but remained consistent for individuals, fed only once a month. Time to prey capture decreased for food-limited individuals, and the proportion of individuals that ate in the 30-day group was higher than in the well-fed group, but the results for locomotory activity and detection distances were inconclusive. Overall, changes in metabolism and behavior were more noticeable in the well-fed group compared to individuals fed once a month.
","abstract_html":"<p>This study examined the effect of different periods of food deprivation on resting metabolic rates (RMR) and foraging activities in tarantulas (<em>Phormictopus cancerides</em>). Juvenile tarantulas were separated into two feeding groups and fed once either every 5 or 30 days. Monthly feeding trials were preceded by RMR measurements. During feeding trials I compared differences between the two groups in (1) prey capture rates, (2) time to prey capture, (3) locomotory activity, and (4) the predator’s prey detection distance. RMRs increased for the well-fed group but remained consistent for individuals, fed only once a month. Time to prey capture decreased for food-limited individuals, and the proportion of individuals that ate in the 30-day group was higher than in the well-fed group, but the results for locomotory activity and detection distances were inconclusive. Overall, changes in metabolism and behavior were more noticeable in the well-fed group compared to individuals fed once a month.</p>","abstract_has_math":false,"creators":["Philip, Benjamin Nathan"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Open Access Thesis","degree_discipline":"Biology","degree_department":null,"school":null,"contributors":["Dr. Cara Shillington, Chair","Dr. Peter Bednekoff","Dr. Tamara Greco"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2006,"date_issued":"2006-01-01T08:00:00Z","date_published":"2006-01-01T08:00:00Z","updated_at":"2026-07-24T02:16:24Z","subjects":["Spiders Behavior","Tarantulas Behavior","Tarantulas Metabolism","Biology"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://commons.emich.edu/theses/82","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Dr. Cara Shillington, Chair","Dr. Peter Bednekoff","Dr. Tamara Greco"]},{"key":"dc:creator","label":"Author","values":["Philip, Benjamin Nathan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Biology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Open Access Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Spiders Behavior","Tarantulas Behavior","Tarantulas Metabolism","Biology"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://commons.emich.edu/theses/82"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This study examined the effect of different periods of food deprivation on resting metabolic rates (RMR) and foraging activities in tarantulas (Phormictopus cancerides). Juvenile tarantulas were separated into two feeding groups and fed once either every 5 or 30 days. Monthly feeding trials were preceded by RMR measurements. During feeding trials I compared differences between the two groups in (1) prey capture rates, (2) time to prey capture, (3) locomotory activity, and (4) the predator’s prey detection distance. RMRs increased for the well-fed group but remained consistent for individuals, fed only once a month. Time to prey capture decreased for food-limited individuals, and the proportion of individuals that ate in the 30-day group was higher than in the well-fed group, but the results for locomotory activity and detection distances were inconclusive. Overall, changes in metabolism and behavior were more noticeable in the well-fed group compared to individuals fed once a month.
"]},{"key":"dc:title","label":"Title","values":["The effect of prey availability on metabolism and activity in the tarantula phormictopus cancerides (araneae: theraphosidae)"]}]}],"canonical_facts":{"dc:contributor":["Dr. Cara Shillington, Chair","Dr. Peter Bednekoff","Dr. Tamara Greco"],"dc:creator":["Philip, Benjamin Nathan"],"dc:description.abstract":["This study examined the effect of different periods of food deprivation on resting metabolic rates (RMR) and foraging activities in tarantulas (Phormictopus cancerides). Juvenile tarantulas were separated into two feeding groups and fed once either every 5 or 30 days. Monthly feeding trials were preceded by RMR measurements. During feeding trials I compared differences between the two groups in (1) prey capture rates, (2) time to prey capture, (3) locomotory activity, and (4) the predator’s prey detection distance. RMRs increased for the well-fed group but remained consistent for individuals, fed only once a month. Time to prey capture decreased for food-limited individuals, and the proportion of individuals that ate in the 30-day group was higher than in the well-fed group, but the results for locomotory activity and detection distances were inconclusive. Overall, changes in metabolism and behavior were more noticeable in the well-fed group compared to individuals fed once a month.
"],"dc:identifier":["https://commons.emich.edu/theses/82"],"dc:subject":["Spiders Behavior","Tarantulas Behavior","Tarantulas Metabolism","Biology"],"dc:title":["The effect of prey availability on metabolism and activity in the tarantula phormictopus cancerides (araneae: theraphosidae)"],"thesis:degree_discipline":["Biology"],"thesis:degree_level":["Open Access Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T02:16:24Z"}