Now showing items 1-10 of 10
An improved method for mapping oyster bottom using a global positioning system and an acoustic profiler
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The distribution of Perkinsus marinus in Gulf coast oysters: its relationship with temperature, reproduction, and pollutant body burden.
Oysters from 48 Gulf of Mexico sites were examined for presence and infection intensity of the endoparasite, Perkinsus (=Dermocystidium) marinus (Macklin, Owen, Collier, 1950) as part of NOAA's Status and Trends Mussel ...
The effect of the ectoparasitic pyramidellid snail, Boonea impressa, on the growth and health of oysters, Crassostrea virginica, under field conditions.
Boonea (= Odostomia) impressa are contagiously distributed on oyster reefs so that some oysters are parasitized more than others. The parasite's mobility and the ability of oysters to recover from snail parasitism may be ...
The spatial distribution of Perkinsus marinus, a protozoan parasite, in relation to its oyster host (Crassostrea virginica) and an ectoparasitic gastropod (Boonea impressa).
The endoparasitic protozoan Perkinsus (=Dermocystidium) marinus is a major cause of oyster mortality in the Gulf of Mexico. The small-scale spatial distribution of P. marinus, its oyster host, and a second oyster parasite, ...
Modeling oyster populations: III. Critical feeding periods, growth and reproduction
It is hypothesized that variations in the seasonal sequence in temperature and food supply cause variations in oyster reproductive effort. Causes of alterations in the duration of spawning and seasonal spawning patterns ...
Spatial and temporal distributions of contaminant body burden and disease in Gulf of Mexico oyster populations: The role of local and large-scale climatic controls
As part of NOAA's Status and Trends Program, oysters were sampled from 43 sites throughout the Gulf of Mexico from Brownsville, Texas, to the Florida Everglades from 1986 to 1989. Oysters were analyzed for body burden of ...
Modeling oyster populations: the effect of density and food supply on production
A time-dependent model has been developed to assess the response of oyster populations to environmental variables and the importance of population density in optimizing yield under varying climatic and hydrologic conditions. ...
Oyster disease and climate change. Are yearly changes in Perkinsus marinus parasitism in oysters (Crassostrea virginica) controlled by climatic cycles in the Gulf of Mexico?
Fluctuations in the protozoan Perkinsus marinus (pathogen of eastern oysters) have been related to salinity and temperature. Low temperatures and salinities have been shown to limit infection. The distribution of Perkinsus ...
The energetic cost of Perkinsus marinus parasitism in oysters: quantification of the thioglycollate method.
A quantitative method for counting Perkinsus marinus hypnospores is described. Using the method, Mackin's commonly used 0-5 point scale of infection intensity can be shown to be exponential. From general relationships ...
Small scale spatial distribution of oysters (Crassostrea virginica) on oyster reefs.
The small-scale spatial distribution of oysters was examined on 11 reefs in the Copano Bay - Aransas Bay area of the Texas coast. Small oysters (<= 2cm) were contagiously distributed (s^2/x > 1) and positively spatially ...