Defining optimal freshwater flow for oyster production: effects of freshet rate and magnitude of change and duration on eastern oysters and Perkinsus marinus infection

Estuaries and Coasts
National Sea Grant Gulf Oyster Industry Program LSU AgCenter
By: , and 

Links

Abstract

In coastal Louisiana, the development of large-scale freshwater diversion projects has led to controversy over their effects on oyster resources. Using controlled laboratory experiments in combination with a field study, we examined the effects of pulsed freshwater events (freshet) of different magnitude, duration, and rate of change on oyster resources. Laboratory and field evidence indicate that low salinity events (<5 psu) decreased Perkinsus marinus infection intensities. Furthermore, when salinity was low (<5 psu), parasite infection intensities continued to decrease even as temperatures exceeded 20°C. At the same time, oyster growth was positively correlated with salinity. To maximize oyster production, data indicate that both low and high salinity events will be necessary.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Defining optimal freshwater flow for oyster production: effects of freshet rate and magnitude of change and duration on eastern oysters and Perkinsus marinus infection
Series title Estuaries and Coasts
DOI 10.1007/s12237-009-9149-9
Volume 32
Issue 3
Year Published 2009
Language English
Publisher Estuarine Research Federation
Publisher location Port Republic, MD
Contributing office(s) Coop Res Unit Atlanta
Description 13 p.
First page 522
Last page 534
Online Only (Y/N) N
Additional Online Files (Y/N) N