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Biological Sampling within the Pontchartrain Basin with Emphasis on Bonnet Carre’ Spillway Opening

Biological Sampling within the Pontchartrain Basin with Emphasis on Bonnet Carre’ Spillway Opening. Brian Lezina Louisiana Department of Wildlife and Fisheries. Louisiana Department of Wildlife and Fisheries Office of Fisheries - Marine Fisheries resource monitoring

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Biological Sampling within the Pontchartrain Basin with Emphasis on Bonnet Carre’ Spillway Opening

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  1. Biological Sampling within the Pontchartrain Basin with Emphasis on Bonnet Carre’ Spillway Opening Brian Lezina Louisiana Department of Wildlife and Fisheries

  2. Louisiana Department of Wildlife and Fisheries Office of Fisheries - Marine Fisheries resource monitoring - Inland Fisheries resource monitoring, protected and invasive species - University of New Orleans resource monitoring

  3. LDWF Marine / UNOFisheries Independent • Long-term data set • Fixed stations • Sampling frequency increased and new stations added for Bonnet Carre’ • Trawls, finfish nets, oyster dredges • Weekly samples scheduled to last at least through June • Majority of the stations will remain weekly into July

  4. LDWF MarineFisheries Dependent • Recreational surveys • MRFSS Program • Shrimp surveys • On-water commercial surveys • Oyster fishery • Crab effort • Trip Ticket Program • Started 1999 • Information such as landings, location, and effort

  5. LDWF Marine Fisheries / UNO Nekton

  6. LDWF Inland Fisheries • Routine sampling in basin rivers • Directed sampling within Bonnet Carre’ • Assisting USACE with sturgeon translocation • Observation / outreach concerning invasives

  7. What We Have Seen • Sporadic shifts of larger saltwater species with fresh water (like spotted seatrout and crab) • Some movement of recreational anglers • Several species in sub-optimal habitats, esp. brown shrimp and oysters • No large scale changes in assemblages

  8. What We Are Watching • Finfish populations and fisheries • Oyster resources and fishery • Crustacean populations and fisheries • Dissolved Oxygen • Invasive species • Multiple sources of freshwater input • Bonnet Carre’ • Mississippi River • Pearl River and Northshore rivers

  9. Louisiana Department of Natural Resources • Coast-wide Reference Monitoring System - Wetlands • emergent vegetation (marsh / forested wetlands) • Percent cover, dbh • sampled annually • Project Specific • emergent and submerged aquatics

  10. Mississippi Department of Marine Resources • Finfish and Invertebrate Monitoring • - 8 stations in western Mississippi Sound • initially weekly then monthly for several months after spillway closure (trawls) • abundance, distribution, species assemblage changes • Oyster Monitoring • - 7 stations in Mississippi Sound • - monthly sampling frequency • - oyster mortality, stress, and condition

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