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Full-Text Articles in Life Sciences
The “Challenge" Of Depletion: Why The Oyster Fishery Is Not Self-Regulating, Eric N. Powell, John M. Klinck, Leanne M. Poussard
The “Challenge" Of Depletion: Why The Oyster Fishery Is Not Self-Regulating, Eric N. Powell, John M. Klinck, Leanne M. Poussard
CCPO Publications
The possibility that the economics of the oyster fishery impose a self-limitation on overharvesting has been proffered on occasion. The inefficiency of harvesting by the fishery has been evaluated and estimates of the exploitation rate permissible under conditions of maximum sustainable yield have been obtained in previous studies. The question becomes to what extent does the inefficiency of harvest interact with the economics of the fishery to compromise ready detection of overfishing? This study explores the possibility that the constraint of economics on the fishery occurs at oyster exploitation rates that are higher than maximum sustainable yield, leading ineluctably to …
A Retrospective Analysis Of Sustainable Oyster Harvest From The Louisiana State Primary Seed Grounds, 1999-2010: A Shell-Neutral Modeling Approach, Thomas M. Soniat, Mahdi Abdelguerfi, Eric N. Powell, John M. Klinck, Eileen E. Hofmann, Shengru Tu, Nathan Cooper, Janak Dahal, John Finigan, Benjamin S. Eberline, Jerome F. La Peyre, Megan K. La Peyre, Keith B. Ibos, Brian Lezina, Patrick Banks
A Retrospective Analysis Of Sustainable Oyster Harvest From The Louisiana State Primary Seed Grounds, 1999-2010: A Shell-Neutral Modeling Approach, Thomas M. Soniat, Mahdi Abdelguerfi, Eric N. Powell, John M. Klinck, Eileen E. Hofmann, Shengru Tu, Nathan Cooper, Janak Dahal, John Finigan, Benjamin S. Eberline, Jerome F. La Peyre, Megan K. La Peyre, Keith B. Ibos, Brian Lezina, Patrick Banks
CCPO Publications
No abstract provided.
Application Of A Gene-Based Population Dynamics Model To The Optimal Egg Size Problem: Why Do Bivalve Planktotrophic Eggs Vary In Size?, Eric N. Powell, Jason Morson, John M. Klinck
Application Of A Gene-Based Population Dynamics Model To The Optimal Egg Size Problem: Why Do Bivalve Planktotrophic Eggs Vary In Size?, Eric N. Powell, Jason Morson, John M. Klinck
CCPO Publications
The presumption is that egg quality influences larval survival and that egg size influences egg quality. Thus, larger eggs should be favored by selection. Counterweighing the tendency for egg size to increase is the number of eggs that can be produced if egg size remains small. We examine how egg size and egg number counterbalance in Crassostrea oysters, resulting in an average egg size near 50 mu m. Simulations imposing a diversity of ranges in larval survivorship-from little advantage for large eggs relative to small eggs to a great advantage-yield some anticipated outcomes in which genotypes generating larger eggs are …
Modeling The Msx Parasite In Eastern Oyster (Crassostrea Virginica) Populations. Iii. Regional Application And The Problem Of Transmission, Eric N. Powell, John M. Klinck, Susan E. Ford, Eileen E. Hofmann, Stephen J. Jordon
Modeling The Msx Parasite In Eastern Oyster (Crassostrea Virginica) Populations. Iii. Regional Application And The Problem Of Transmission, Eric N. Powell, John M. Klinck, Susan E. Ford, Eileen E. Hofmann, Stephen J. Jordon
CCPO Publications
A model of transmission for Haplosporidium nelsoni, the disease agent for MSX disease, is developed and applied to sites in Delaware Bay and Chesapeake Bay. The environmental factors that force the oyster population- H. nelsoni model are salinity, temperature, food, and total suspended solids. The simulated development of MSX disease was verified using 3 time series of disease prevalence and intensity: 1960 to 1970 and 1980 to 1990 for Delaware Bay, and 1980 to 1994 for Chesapeake Bay, and for a series of sites covering the salinity gradient in each bay. Additional simulations consider the implications of assumptions made …