Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Marine Biology
Age, Growth And Population Dynamics Of The Sandbar Shark, Carcharhinus Plumbeus, At Different Population Levels, Thomas R. Sminkey
Age, Growth And Population Dynamics Of The Sandbar Shark, Carcharhinus Plumbeus, At Different Population Levels, Thomas R. Sminkey
Dissertations, Theses, and Masters Projects
The objectives of my research were to test the hypothesis that compensatory (density-dependent) growth of sandbar shark (Carcharhinus plumbeus) occurred after severe population reduction, to describe the juvenile sandbar shark fauna present in the Chesapeake Bay during 1980-81 and 1990-93, and to perform demographic analyses to examine potential population growth. Age and growth of sandbar sharks were investigated by counting rings in vertebral samples collected in 1980-81 and 1991-92. Age at maturity was 15-16 years for both sample periods and both sexes. For sexes combined, the von Bertalanffy growth parameters were L&\sb{lcub}\infty{rcub}& = 199 cm precaudal length (PCL), K = …
Quantification Of Settlement And Recruitment Processes In Bivalve Mollusks, Patrick Kelly Baker
Quantification Of Settlement And Recruitment Processes In Bivalve Mollusks, Patrick Kelly Baker
Dissertations, Theses, and Masters Projects
Studies were carried out to quantify abundance, mortality, and variability in these parameters, during settlement and recruitment of bivalve mollusks, using the oyster, Crassostrea virginica, as a primary model species. Most work was undertaken in the York River, Chesapeake Bay, Virginia, with additional work in the Indian River, Florida. The period chosen, in the bivalve early life history, was from the late planktonic larva to the early benthic juvenile. Studies were designed to specifically examine (a) abundance of late-stage larvae in the plankton, (b) the relationship between larval abundance and settlement, and (c) mortality immediately following settlement. Variability in abundance …