The taxonomy and summer and fall vertical distribution of the Chaetognatha off Galveston, Texas.

dc.acquisition-srcen_US
dc.call-noQl391.C6 A3 1967 GBAYen_US
dc.contract-noen_US
dc.contributor.authorAdelmann, H.C.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:06:20Z
dc.date.available2010-02-15T17:06:20Z
dc.date.issued1967en_US
dc.degreeen_US
dc.description117 pagesen_US
dc.description-otheren_US
dc.description.abstractThe chaetognaths off Galveston, Texas have been studied from specimens collected during June, July, September, and November, 1963. Two genera and six species were identified, described, and illustrated. One species, Sagitta serratodentata, present in the Galveston area has not been reported from the Texas coast previously. However, six species reported from Port Aransas were not found in the present study. No marked difference was found between the species of the west coast of Florida and the western Gulf. Occurrence and abundance were summarized in the form of a table. Vertical distribution and diel migration were also discussed and accompanied by numerous diameter and line graphs. Vertical distribution was evident for the combined chaetognath populations, with definite diel migration patterns exhibited by the two abundant species, Sagitta enflata and Sagitta tenuis. Temperatures and salinities were relatively constant during the periods of sampling and appeared to have no significant effect on the distribution of the species present. The combined effects of varied light intensity and turbidity appeared to affect vertical migration time. The organisms migrated downward later and upward earlier during the periods when the water was most turbid and the light intensity was lowest. Diel migration varied slightly between summer and fall. No marked difference was found between the migration patterns of adults and immature forms.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeTexas coasten_US
dc.geo-codeGalveston Islanden_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/21866
dc.latitudeen_US
dc.locationGBIC Collectionen_US
dc.longitudeen_US
dc.notesen_US
dc.placeCollege Station, Texasen_US
dc.publisherTexas A&M University.en_US
dc.relation.ispartofseries406en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectSagitta serratodentataen_US
dc.subjectSagitta enflataen_US
dc.subjectSagitta tenuisen_US
dc.subjectChaetognathaen_US
dc.subjectvertical distributionen_US
dc.subjectseasonal distributionen_US
dc.subjecttaxonomyen_US
dc.subjectabundanceen_US
dc.subjectseasonal variationsen_US
dc.subjectdiurnal variationsen_US
dc.titleThe taxonomy and summer and fall vertical distribution of the Chaetognatha off Galveston, Texas.en_US
dc.typeDissertationen_US
dc.universityen_US
dc.vol-issueen_US
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