Genetic Considerations for Hatchery-Based Restoration of Oyster Reefs : A summary from the September 21-22, 2000 workshop

The following is a summary of issues and considerations surrounding the use of hatchery stocks for restoration of public oyster reefs. This summary stems from a workshop conducted at the Virginia Institute of Marine Science (VIMS). The original goal of the workshop was to try to develop a consensus, or at least a general agreement, on genetic policy(ies) for stocking oyster reefs. To do this, the first day of the workshop was devoted to placing the genetic concerns on the table in the context of both Maryland and Virginia oyster replenishment and restoration programs. The conclusions from the first day of presentations revealed that there are a number of scenarios for hatchery-based restoration/ replenishment and that the genetic considerations varied among them. Other genetic considerations were common to the whole Bay. This document summarizes a great deal of discussion, and consequently some detail is omitted

A short history of evolutionary theory Uma breve história da teoria evolutiva

The history of the Theory of Evolution has been told a number of times by historians, philosophers, professors, writers, scientists and so on. However, many of these versions differ from or even contradict one another. In this article, the history of the Theory of Evolution is retold according to a dialectical-materialistic perspective. It analyzes the historical contradictions between Darwinian evolution theory and Mendel's model, the background that led to the synthetic theory of evolution, the debate carried out by classic schools and the result of synthesis, as well as the still current debate between Neutralism and Selectionism. Finally, it also discusses the interpretative model used ("an idiosyncratic dialectic materialism"), mainly in relation with Popper's and Kuhn's models.<br>A história da teoria evolutiva tem sito contada inúmeras vezes por historiadores, filósofos, professores, escritores, cientistas etc. Contudo, muitas destas versões diferem entre si ou mesmo se contradizem. Neste trabalho, a história da teoria evolutiva é recontada a partir de uma perspectiva materialista dialética. São analisadas as contradições históricas entre a teoria evolutiva darwiniana e o modelo mendeliano, o caminho para a teoria sintética da evolução, o debate entre as escolas clássica e do balanco que sucedeu a síntese, bem como o debate, ainda atual, entre neutralismo e selecionismo. Ao final, o modelo interpretativo utilizado ("um materialismo dialético idiossincrático") é discutido, principalmente, em relação aos modelos popperiano e kuhniano