Hemisquilla ensigera califomiensis is an active burrow-dwelling stomatopod crustacean common off the coast of Southern California (Basch and Engle, 1989). In this experiment I measured the typical burrow oxygen level, time taken to deplete the oxygen in an inhabited, capped burrow, and tested the hypothesis that H. ensigera, like other burrow dwellers that have been examined, is an oxyregulator; and that like crustaceans in general, they have only limited anaerobic capabilities. Contrary to expectations, I found that H. ensigera is an oxyconformer or at best a weak oxyregulator, and that the species has substantial anaerobic capacity. Since it was able to survive at least 52 hours of anoxia, it ranks among the crustaceans which have the longest anaerobic survival times.
","abstract_html":"<p><em>Hemisquilla ensigera califomiensis</em> is an active burrow-dwelling stomatopod crustacean common off the coast of Southern California (Basch and Engle, 1989). In this experiment I measured the typical burrow oxygen level, time taken to deplete the oxygen in an inhabited, capped burrow, and tested the hypothesis that <em>H. ensigera</em>, like other burrow dwellers that have been examined, is an oxyregulator; and that like crustaceans in general, they have only limited anaerobic capabilities. Contrary to expectations, I found that <em>H. ensigera</em> is an oxyconformer or at best a weak oxyregulator, and that the species has substantial anaerobic capacity. Since it was able to survive at least 52 hours of anoxia, it ranks among the crustaceans which have the longest anaerobic survival times.</p>","abstract_has_math":false,"creators":["Peters, Leandra P."],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Thesis","degree_discipline":"Biology","degree_department":null,"school":null,"contributors":["David L. Cowles","William Hayes","David Hessinger"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1997,"date_issued":"1997-08-01T07:00:00Z","date_published":"1997-08-01T07:00:00Z","updated_at":"2026-07-24T02:53:08Z","subjects":["Biology","Marine Biology","Hemisquilla Ensigera Californiensis -- Adaptation; Decapoda (Crustacea) -- Behavior."],"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/683","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["David L. Cowles","William Hayes","David Hessinger"]},{"key":"dc:creator","label":"Author","values":["Peters, Leandra P."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Biology"]},{"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","Marine Biology","Hemisquilla Ensigera Californiensis -- Adaptation; Decapoda (Crustacea) -- Behavior."]}]},{"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/683"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Hemisquilla ensigera califomiensis is an active burrow-dwelling stomatopod crustacean common off the coast of Southern California (Basch and Engle, 1989). In this experiment I measured the typical burrow oxygen level, time taken to deplete the oxygen in an inhabited, capped burrow, and tested the hypothesis that H. ensigera, like other burrow dwellers that have been examined, is an oxyregulator; and that like crustaceans in general, they have only limited anaerobic capabilities. Contrary to expectations, I found that H. ensigera is an oxyconformer or at best a weak oxyregulator, and that the species has substantial anaerobic capacity. Since it was able to survive at least 52 hours of anoxia, it ranks among the crustaceans which have the longest anaerobic survival times.
"]},{"key":"dc:title","label":"Title","values":["Oxyconformity in Burrow-dwelling Crustaceans : Aerobic Metabolism of HEMISQUILLA ENSIGERA CALIFORNIENSIS"]}]}],"canonical_facts":{"dc:contributor":["David L. Cowles","William Hayes","David Hessinger"],"dc:creator":["Peters, Leandra P."],"dc:description.abstract":["Hemisquilla ensigera califomiensis is an active burrow-dwelling stomatopod crustacean common off the coast of Southern California (Basch and Engle, 1989). In this experiment I measured the typical burrow oxygen level, time taken to deplete the oxygen in an inhabited, capped burrow, and tested the hypothesis that H. ensigera, like other burrow dwellers that have been examined, is an oxyregulator; and that like crustaceans in general, they have only limited anaerobic capabilities. Contrary to expectations, I found that H. ensigera is an oxyconformer or at best a weak oxyregulator, and that the species has substantial anaerobic capacity. Since it was able to survive at least 52 hours of anoxia, it ranks among the crustaceans which have the longest anaerobic survival times.
"],"dc:identifier":["https://scholarsrepository.llu.edu/etd/683"],"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","Marine Biology","Hemisquilla Ensigera Californiensis -- Adaptation; Decapoda (Crustacea) -- Behavior."],"dc:title":["Oxyconformity in Burrow-dwelling Crustaceans : Aerobic Metabolism of HEMISQUILLA ENSIGERA CALIFORNIENSIS"],"thesis:degree_discipline":["Biology"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T02:53:08Z"}