The diel vertical distribution of copepods off Galveston, Texas.

Simple item page
dc.acquisition-srcen_US
dc.call-noQL441.1 A4 1967 GBAYen_US
dc.contract-noen_US
dc.contributor.authorAllison, T.C.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:06:24Z
dc.date.available2010-02-15T17:06:24Z
dc.date.issued1967en_US
dc.degreeen_US
dc.description133 p., Dissertationen_US
dc.description-otheren_US
dc.description.abstractA study of the diel (24-hour) vertical distribution of some Gulf of Mexico copepods was undertaken during June, July, September and November, 1963. Collections with a double-net Clarke-Bumpus sampler were taken by a research vessel of the U.S. Fish and Wildlife Service, Bureau of Commercial Fisheries, Galveston, Texas. Two collection sites were selected; Station A in 12 m mear San Luis Pass, Station B in 36.5 m approximately 50 miles south of Galveston. Station A was sampled only in June while Station B was sampled in all four months. Both stations were sampled systematically at four-hour intervals and at three depths (Station A: 2, 4, and 8 m; Station B: 2, 18, and 34 m) for periods varying from 30 hours in June to 44 hours in November. Forty-six species of copepods which could be identified, plus six species identified only to genus and two species identified only to family were taken at the two stations. Eleven species plus one unidentified immature copepod were abundant and present consistently enough to permit diagramming their diel vertical distributions. Three basic distribution patterns were noted. Seven species (Acartia tonsa, Undinula vulgaris, Eucalnaus pileatus, Calocalanus pavo, Calanopia americana, Temora turbinata, Corycaeus amazonicus) showed evidence of a normal diel vertical distribution. One species (Corycaeus subulatus) appeared to have a reverse diel distribution and three species (Paracalanus parvus, Corycaeus clausi, Oithona plumifera and the juveniles) showed evidence of a normal pattern with very short migrations. Seasonal changes in light, temperature and salinity conditions apparently did not affect the diel vertical distribution of any of the copepods in this study. In addition to the data on diel vertical distribution, several observations were made concerning the copepod community. In June, 1963, the abundance and numbers of species were greater at Station B than at the more inshore Station A. The total copepod abundance was at a peak in June and July during the sampling period. The most abundant copepods present were Paracalanus parvus and Temora turbinata. Lucicutia clausi is a new record for the Gulf of Mexico copepod fauna.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeGalveston Islanden_US
dc.geo-codeSan Luis Passen_US
dc.geo-codeNorthwestern Gulf of Mexicoen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/21876
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.ispartofseries407.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectcopepodsen_US
dc.subjectmarine crustaceansen_US
dc.subjectvertical distributionen_US
dc.subjectdiurnal variationsen_US
dc.subjectdouble-net Clarke-Bumpus sampleren_US
dc.subjectvertical migrationsen_US
dc.subjectabundanceen_US
dc.titleThe diel vertical distribution of copepods off Galveston, Texas.en_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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