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Graham S. Goulette1. , James P. Hawkes1, Michael B. O’Malley1, Paul M

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Presentation on theme: "Graham S. Goulette1. , James P. Hawkes1, Michael B. O’Malley1, Paul M"— Presentation transcript:

1 Estuarine and community emigration ecology of Atlantic salmon in the Penobscot Estuary, Maine
Graham S. Goulette1*, James P. Hawkes1, Michael B. O’Malley1, Paul M. Music1, Justin R. Stevens1, Daniel S. Stich2 and Christine A. Lipsky1 1 NOAA’s National Marine Fisheries Service, Northeast Fisheries Science Center, 17 Godfrey Drive Suite 1, Orono, ME U.S.A. 2 Department of Wildlife Ecology, 5755 Nutting Hall, University of Maine, Orono, ME U.S.A.

2 Introduction Historically low Atlantic salmon abundance
Smolt survival and behavior in the Penobscot Estuary Identifying areas of high loss – what is predator suite Estuarine community – potential for prey buffer

3 Approach Emigration dynamics Survival estimates Areas of loss
Telemetry Emigration dynamics Survival estimates Areas of loss Potential Predators Avian and marine mammal surveys Abundance and behavior Estuary sampling Species composition Relative abundance Size distribution Hydro-acoustic surveys Fish Biomass Temporal and spatial distribution

4 Study area Release Site Outer Arrays

5 Survival Seaward Progression

6 Emigration Dynamics Daylight Twilight Night Fish Track

7 Emigration Dynamics Daylight Twilight Night Fish Track

8 Active Searches Release Site Final resting location

9 Cormorant Roosting Sites
Active Searches NOAA Transmitters USGS Transmitters Cormorant Roosting Sites

10 Survival Bottlenecks Seaward Progression

11 Estuary Sampling Beach Seines Fyke Nets Pelagic Trawls Hydro-acoustics
Predator surveys

12 Size Distributions Smolts Other Species

13 Temporal/Spatial Distributions
April 20th 2012 May 5th 2012 June 1st 2012 June 19th 2012

14 Baseline Abundance Smolts Other Species

15 Five Fold Increase Smolts Other Species

16 Ten Fold Increase Smolts Other Species

17 Moving Forward Develop multiyear telemetry study using various release times Expand hydroacoustic effort further into bay Explore existence or non-existence of prey buffer in adjacent systems

18 Questions?

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