The growth, respiration, and energetics of Mysidopsis almyra (Crustacea: Mysidacea) in relation to temperature, salinity and hydrocarbon exposure.

dc.acquisition-srcen_US
dc.call-noQH92.1 R4 1981 GBAYen_US
dc.contract-noen_US
dc.contributor.authorReitsema, L.A.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T16:57:47Z
dc.date.available2010-02-15T16:57:47Z
dc.date.issued1981en_US
dc.degreeen_US
dc.description121 p., Dissertationen_US
dc.description-otheren_US
dc.description.abstractA total of 6,924 individual mysids (Mysidopsis almyra) were divided among 249 combinations of temperature (20, 25, and 30 C), salinity, South Louisiana crude oil water soluble fraction (WSF) concentration (0, 2, 5, 10, and 20%) at various ages (0, 1, 3, 5, 8, 12, 18, and 24 days) and respiratory rate and dry weight of mysids were obtained at each of these combinations. Growth was greatest in mysids exposed to temperatures of 25 and 30 C and salinities of 20 and 30 ppt. Growth was sharply reduced at high temperatures at low salinities and at low temperatures at high salinities. Mysid growth was reduced in WSF concentrations of 10 and 20%, corresponding to total dissolved hydrocarbon concentration concentrations of 2.37 and 4.75 ppm. These values are approximately for times lower than the 48 hr LC50 (concentration which caused mortality in 50% of mysids exposed for 48 hrs) concentration of south Louisiana crude oil WSF for M. almyra. The respiratory rate of mysids was highest at 25 C and 30 ppt salinity. Temperature had a greater effect on respiration than salinity. The effect on mysid respiration of the oil WSF varied with the age of mysids, with a greater effect observed on the younger mysids (less than 8 days of age) than older organisms. The energetics studies utilizing these data, as well as values from the literature, indicated that M. almyra has a gross ecological efficiency (yield/ingested) of 12.24%. This value was 10.44% for mysids exposed to a 20% WSF concentration. The net ecological efficiency (assimilated/ingested) of unexposed animals was calculated to be 69%. When reared in a 20% WSF concentration, the net ecological efficiency is decreased to 59%. These values are realistic in relation to values in the existing literature, and indicate that the bioenergetics approach may contribute valuable information to studies of environmental pollutants.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeTexas coasten_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/20463
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.ispartofseries2664.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectmysid shrimpen_US
dc.subjectMysidopsis almyraen_US
dc.subjecttemperature toleranceen_US
dc.subjectsalinity gradientsen_US
dc.subjectoil pollutionen_US
dc.subjectpetroleum hydrocarbonsen_US
dc.subjectgrowthen_US
dc.subjectrespirationen_US
dc.titleThe growth, respiration, and energetics of Mysidopsis almyra (Crustacea: Mysidacea) in relation to temperature, salinity and hydrocarbon exposure.en_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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