{"id":{"repo_id":"loma-linda","oai_identifier":"oai:scholarsrepository.llu.edu:etd-1127"},"canonical_url":"https://search.dev.ndltd.org/etd/loma-linda/oai:scholarsrepository.llu.edu:etd-1127","repository":{"repo_id":"loma-linda","name":"Loma Linda University","base_url":"https://scholarsrepository.llu.edu/do/oai/"},"display":{"title":"Sexual Dimorphism and Behavioral Responses to Conspecific Chemical Cues in Pagurus samuelis","abstract":"Anatomical differences were observed between sexes of P. samuelis. We measured the major cheliped and carapace lengths of hermit crabs caught off the coast of Southern California and found that male chelipeds were significantly larger relative to their carapace length than female chelipeds. Average male cheliped:carapace ratios were 1.86 while average female cheliped:carapace ratios were 1.32. We predicted that males and females would respond differently to cue waters created from their own sex. Females were exposed to female cue treatment odors and males were exposed to male cue treatment odors. We recorded hermit crabs exposed to cue treatment waters and analyzed four behaviors: withdrawn, head-extended, walking, and meral spread. Females were more likely than males to remain withdrawn in their shells when in non-agonistic cue treatment waters. Males were more likely than females to display meral spread when sensing conspecific cues. Both sexes displayed no difference in the amount of time spent stationary with head-extended across all cue treatment waters. Both sexes tended to walk more in the presence of agonistic cue waters.","abstract_html":"Anatomical differences were observed between sexes of P. samuelis. We measured the major cheliped and carapace lengths of hermit crabs caught off the coast of Southern California and found that male chelipeds were significantly larger relative to their carapace length than female chelipeds. Average male cheliped:carapace ratios were 1.86 while average female cheliped:carapace ratios were 1.32. We predicted that males and females would respond differently to cue waters created from their own sex. Females were exposed to female cue treatment odors and males were exposed to male cue treatment odors. We recorded hermit crabs exposed to cue treatment waters and analyzed four behaviors: withdrawn, head-extended, walking, and meral spread. Females were more likely than males to remain withdrawn in their shells when in non-agonistic cue treatment waters. Males were more likely than females to display meral spread when sensing conspecific cues. Both sexes displayed no difference in the amount of time spent stationary with head-extended across all cue treatment waters. Both sexes tended to walk more in the presence of agonistic cue waters.","abstract_has_math":false,"creators":["Kim, Maria"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Thesis","degree_discipline":"Earth and Biological Sciences","degree_department":null,"school":null,"contributors":["Dunbar, Stephen G.","Hayes, William","Boskovic, Danilo"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-03-01T08:00:00Z","date_published":"2013-03-01T08:00:00Z","updated_at":"2026-07-24T02:52:15Z","subjects":["Biology","Pagurus samuelis; Adaptation (Biology)","Sexual dimorphism","Pagurus samuelis","Hermit crabs"],"languages":["English"],"rights":["This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholarsrepository.llu.edu/etd/128","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Dunbar, Stephen G.","Hayes, William","Boskovic, Danilo"]},{"key":"dc:creator","label":"Author","values":["Kim, Maria"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Earth and Biological Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["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":["Biology","Pagurus samuelis; Adaptation (Biology)","Sexual dimorphism","Pagurus samuelis","Hermit crabs"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarsrepository.llu.edu/etd/128"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Anatomical differences were observed between sexes of P. samuelis. We measured the major cheliped and carapace lengths of hermit crabs caught off the coast of Southern California and found that male chelipeds were significantly larger relative to their carapace length than female chelipeds. Average male cheliped:carapace ratios were 1.86 while average female cheliped:carapace ratios were 1.32. We predicted that males and females would respond differently to cue waters created from their own sex. Females were exposed to female cue treatment odors and males were exposed to male cue treatment odors. We recorded hermit crabs exposed to cue treatment waters and analyzed four behaviors: withdrawn, head-extended, walking, and meral spread. Females were more likely than males to remain withdrawn in their shells when in non-agonistic cue treatment waters. Males were more likely than females to display meral spread when sensing conspecific cues. Both sexes displayed no difference in the amount of time spent stationary with head-extended across all cue treatment waters. Both sexes tended to walk more in the presence of agonistic cue waters."]},{"key":"dc:title","label":"Title","values":["Sexual Dimorphism and Behavioral Responses to Conspecific Chemical Cues in Pagurus samuelis"]}]}],"canonical_facts":{"dc:contributor":["Dunbar, Stephen G.","Hayes, William","Boskovic, Danilo"],"dc:creator":["Kim, Maria"],"dc:description.abstract":["Anatomical differences were observed between sexes of P. samuelis. We measured the major cheliped and carapace lengths of hermit crabs caught off the coast of Southern California and found that male chelipeds were significantly larger relative to their carapace length than female chelipeds. Average male cheliped:carapace ratios were 1.86 while average female cheliped:carapace ratios were 1.32. We predicted that males and females would respond differently to cue waters created from their own sex. Females were exposed to female cue treatment odors and males were exposed to male cue treatment odors. We recorded hermit crabs exposed to cue treatment waters and analyzed four behaviors: withdrawn, head-extended, walking, and meral spread. Females were more likely than males to remain withdrawn in their shells when in non-agonistic cue treatment waters. Males were more likely than females to display meral spread when sensing conspecific cues. Both sexes displayed no difference in the amount of time spent stationary with head-extended across all cue treatment waters. Both sexes tended to walk more in the presence of agonistic cue waters."],"dc:identifier":["https://scholarsrepository.llu.edu/etd/128"],"dc:language":["English"],"dc:rights":["This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights."],"dc:subject":["Biology","Pagurus samuelis; Adaptation (Biology)","Sexual dimorphism","Pagurus samuelis","Hermit crabs"],"dc:title":["Sexual Dimorphism and Behavioral Responses to Conspecific Chemical Cues in Pagurus samuelis"],"thesis:degree_discipline":["Earth and Biological Sciences"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T02:52:15Z"}