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Improving region specific eastern oyster models by quantifying physiological responses regional environmental and climatic variability (using a DEB approach)

Duration

February 2014 - January 2016

Narrative

This study proposes to develop a DEB model for the eastern oyster, specifically applicable to the eastern oyster in the northern Gulf of Mexico. This project will involve several steps (1) develop a generic DEB model for the eastern oyster using available information for the eastern oyster (regardless of region or source population), (2) quantify key physiological rates (i.e., respiration, ingestion) for nGoM eastern oysters exposed to the range of temperature, salinity and food conditions reflecting conditions in the nGoM in order to provide model parameters, (3) fully parameterize the generic DEB model using our experimental data, and (4) use existing datasets (JLaPeyre & MLaPeyre, Louisiana Department of Wildlife and Fisheries) to calibrate and test the DEB model. The measurement of precise respiration and filtration rates (to derive ingestion) under a wide range of salinity, temperature and food conditions and the development of a DEB model for predicting oyster growth would ensure more accurate predictions of oyster growth, harvest, under specific environmental conditions. Furthermore, this work would enable predictions of carrying capacity for proposed regional aquaculture parks, identification of areas for restoration and protected areas, and predictions of oyster growth and production under predicted water diversion, sea level rise, and climate change scenarios. Ultimately, the generic DEB model could also be parameterized for other regions and applied widely.

Research Products and Activities

Peer Reviewed Publications

  • Lavaud R., La Peyre MK, Casas S, Bacher C, La Peyre JF. 2017. Integrating the effects of salinity on the physiology of the eastern oyster, Crassostrea virginica, in the northern Gulf of Mexico through a Dynamic Energy Budget model. Ecological Modelling 363:221-233. Abstract | 

Thesis

  • Bernasconi, S. 2016. Eastern oyster physiological responses to acute and chronic exposure to suspended sediments. MS Thesis. Louisiana State University.

Presentations

  • Lavaud, R., M. La Peyre, C. Bacher, s. Casas Liste, J. La Peyre. 2015 Quantifying physiological response of eastern oyster, Crassostrea virginica, to regional environmental variability using the Dynamic Energy Budget Theory . National Shellfisheries Association 103rd Annual Meeting. Monterey CA

  • Lavaud, R., M. La Peyre, C. Bacher, J. La Peyre. 2015. How to include the effect of salinity on the physiological response of eastern oyster, Crassostrea virginica, in a Dynamic Energy Budget Model? 2015 Dynamic Energy Budget Symposium, April 26-28, Marseille, France
  • Lavaud, R., La Peyre, M, Justic, D., Wang, L, Bacher, C and La Peyre J. Predicting potential growth of oysters in the Barataria Bay (Louisiana, USA) using outputs from a hydrodynamic model under scenarios of climate change and river management. Abstract for International Society of Ecological Modeling Meeting, May 2016.
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Current Staff

Federal Staff: 3

Masters Students: 0

Phd Students: 3

Post Docs: 1

University Staff: 4

5 Year Summary

Students graduated: 13

Scientific Publications: 46

Presentations: 76

 

Personnel

Funding Agencies

  • Louisiana Sea Grant

Links

Louisiana Cooperative Fish and Wildlife Research Unit Cooperators

  1. Louisiana Department of Wildlife and Fisheries
  2. Louisiana State University
  3. U.S. Fish and Wildlife Service
  4. U.S. Geological Survey
  5. Wildlife Management Institute