The abundance and distribution of macro-invertebrates in the cooling water canal system of the P.H. Robinson Generating Station located on Galveston Bay, Texas, with emphasis on the effect of supplemental cooling towers.

Simple item page
dc.acquisition-srcen_US
dc.call-noTK1191.M34 1977 GBAYen_US
dc.contract-noen_US
dc.contributor.authorMargraf, F.J.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T16:59:22Z
dc.date.available2010-02-15T16:59:22Z
dc.date.issued1977en_US
dc.degreeen_US
dc.description82 p., Thesisen_US
dc.description-otheren_US
dc.description.abstractTrawl collections were taken from June 1974 to September 1975 to determine the abundance, distribution and survival rate of macro-invertebrates present in the cooling-water canal system of Houston Lighting and Power Company's P.H. Robinson Generating Station. Surface and bottom, day and night collections were taken from two stations in the intake canal, two stations in the discharge canal afferent to the cooling towers and one station in the discharge canal efferent to the cooling towers. A total of 11,655 specimens of 14 species were taken in 464 collections. Abundant species included white shrimp, Penaeus setiferus; brown shrimp, P. aztecus; blue crabs, Callinectes sapidus; and the grass shrimps, Palaemonetes pugio and P. vulgaris. Catches of macro-invertebrates in the intake canal were strongly influenced by seasonal aspects of the life history and migratory patterns of each species. Most captured in the discharge canal were recruited from the intake canal via impingement on the plant's revolving intake screens and subsequent sluicing to the discharge. The number of organisms captured was dependent on their survival rates and retention times. During the summer, catches were generally quite small afferent to the cooling towers and were generally large efferent to the towers. Prior to construction of the cooling towers, catches from both areas of the canal were small during the summer. The cooling towers increased survival rates of macro-invertebrates efferent to the towers by reducing temperatures during the summer. Based on the presence or absence of live and dead individuals in the trawl collections, the estimated upper lethal temperature was 37 C for brown shrimp, 38 C for white shrimp, and 40 C for blue crab. It appears that the supplemental cooling towers have been generally effective in promoting the survival of macro-invertebrates in the heated discharge efferent to the cooling towers.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeGalveston Bayen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/20733
dc.latitudeen_US
dc.locationGBIC Collectionen_US
dc.longitudeen_US
dc.notesSubmitted to Houston Lighting and Power Company.en_US
dc.placeCollege Station, Texasen_US
dc.publisherTexas A&M University.en_US
dc.relation.ispartofseries2927.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectpower plantsen_US
dc.subjectcooling pondsen_US
dc.subjectinvertebrate zoologyen_US
dc.subjectPenaeus aztecusen_US
dc.subjectbrown shrimpen_US
dc.subjectPenaeus setiferusen_US
dc.subjectwhite shrimpen_US
dc.subjectblue craben_US
dc.subjectCallinectes sapidusen_US
dc.subjectgrass shrimpen_US
dc.subjectPalaemonetes pugioen_US
dc.subjectPalaemonetes vulgarisen_US
dc.subjectabundanceen_US
dc.subjectecological distributionen_US
dc.titleThe abundance and distribution of macro-invertebrates in the cooling water canal system of the P.H. Robinson Generating Station located on Galveston Bay, Texas, with emphasis on the effect of supplemental cooling towers.en_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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