Morphology, Meristic Counts, and Melanophore Description for Dionda diaboli (Cyprinidae) during Development

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dc.contributor.advisorBonner, Timothy
dc.contributor.authorHulbert, Julie
dc.contributor.committeeMemberFries, Joe N.
dc.contributor.committeeMemberGarrett, Gary P.
dc.contributor.committeeMemberArsuffi, Tom
dc.date.accessioned2020-05-30T17:02:39Z
dc.date.available2020-05-30T17:02:39Z
dc.date.issued2005-05
dc.description.abstractDevils River minnow Dionda diaboli, listed as threatened (USA) and endangered (Mexico), coexists with at least three congeners throughout its south Texas and northern Mexico range. Monitoring of abundance, distribution, reproduction, and dispersion will be improved with the capability to distinguish larval and juvenile Devils River minnows from congeners and other cyprinids. I described and quantified various characteristics of Devils River minnow early life stages at intervals ranging from time of hatch to 128 days to facilitate larval and juvenile identification. Distinguishing characteristics included mid-lateral melanophores separate from a rounded basicaudal spot by Day 8, lateral snout to eye melanophores by Day 16, initial coiling of intestine by Day 32, wedge-shaped basicaudal spot by Day 64, and mid-lateral double dashes along lateral line and scale borders by Day 128. Collectively, these characteristics and others described herein provided a detailed account of Devils River minnow development through the juvenile stage, but this information may be inadequate for confident identification until early development of other cyprinids is described.
dc.description.departmentBiology
dc.formatText
dc.format.extent39 pages
dc.format.medium1 file (.pdf)
dc.identifier.citationHulbert, J. (2005). Morphology, meristic counts, and melanophore description for Dionda diaboli (Cyprinidae) during development (Unpublished thesis). Texas State University-San Marcos, San Marcos, Texas.
dc.identifier.urihttps://hdl.handle.net/10877/10475
dc.language.isoen
dc.subjectMexico
dc.subjectDionda
dc.subjectTexas
dc.subjectendangered species
dc.titleMorphology, Meristic Counts, and Melanophore Description for Dionda diaboli (Cyprinidae) during Development
dc.typeThesis
thesis.degree.departmentBiology
thesis.degree.grantorTexas State University-San Marcos
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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