The metabolism of carotenoids and their subsequent contribution to coloration in the marine isopod, Sphaeroma quadridentatum

dc.contributor.advisorLoeblich, Alfred R., III
dc.contributor.committeeMemberBryant, Edwin H.
dc.contributor.committeeMemberHoffman, Steven G.
dc.contributor.committeeMemberKohn, Harold Lewis
dc.creatorLeBoeuf, Robert Dellino
dc.date.accessioned2023-12-13T20:53:20Z
dc.date.available2023-12-13T20:53:20Z
dc.date.issued1982
dc.description.abstractI investigated the metabolism of carotenoids, the contributions of carotenoids to body color and the population dynamics in the marine isopod, Sphaeroma quadridentaturn. Morphometric measurements, the types and the concentrations of carotenoids present in whole animal extracts were determined for isopods during growth and maturation, reproduction and also during periods when habitat conditions were changing. Isopods were collected at a Galveston, Texas beachfront site at approximately monthly intervals from March, 1979 through March, 1980. The Texas beachfront population studied had a higher growth rate and a shorter life span than that reported for European sphaeromid species. Temporal variation in monthly mean length was due to the release of brooded young, the death of adults and the growth of juveniles. Beachfront populations may experience two reproductive periods per year, however multiple clutches may be prevented by stringent environmental conditions. Coloration in this species was due to two biochemical components: carotenoids uniformly dispersed through the dermis and cuticle and melanophore pigments in dermal Chromatophores. Body color ranged from yellow to dark grey and was determined by the degree of melanophore pigment dispersion. Melanophore pigments undergo diurnal rhythmic dispersion and pigment dispersion was determined primarily by the ratio of incident to reflected light intensity. [...]
dc.description.departmentBiology and Biochemistry, Department of
dc.format.digitalOriginreformatted digital
dc.format.mimetypeapplication/pdf
dc.identifier.other9357734
dc.identifier.urihttps://hdl.handle.net/10657/15663
dc.language.isoen
dc.rightsThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.
dc.subjectCarotenoids--Metabolism
dc.subjectCrustacea
dc.titleThe metabolism of carotenoids and their subsequent contribution to coloration in the marine isopod, Sphaeroma quadridentatum
dc.type.dcmiText
dc.type.genreThesis
thesis.degree.collegeCollege of Natural Sciences and Mathematics
thesis.degree.departmentBiology, Department of
thesis.degree.disciplineBiology
thesis.degree.grantorUniversity of Houston
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy

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