Fisheries-Independent Monitoring in the Estero Bay Estuary

Transcription

1 Fisheries-Independent Monitoring in the Estero Bay Estuary project funded by the South Florida Water Management District Philip Stevens, Bob McMichael, Marin Greenwood, and Tim MacDonald Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institute, Charlotte Harbor Field Laboratory

2 FIM program Field Labs Choctawhatchee Bay & Santa Rosa Sound Apalachicola 1997 Cedar Key 1996 Tampa Bay 1989 Charlotte Harbor 1989 St. Johns River 2001 Northern Indian River Lagoon 1990 Southern Indian River Lagoon 1997 Florida Keys 1998

3 Myakka River Peace River Gulf of Mexico Caloosahatchee River

4 Research vessel - mullet skiff

5 Sampling gears used by the FIM program

6 Small fish sampling gears 21-m Seine

7 6.1-m Otter Trawl

8 Example of a small fish sample

9 Large fish sampling gears 183-m Haul Seine

10 Examples of a large fish sample

11 Estero Bay estuary Fisheries-Independent Monitoring 3 years ( )

12 Freshwater Inflow 2500 Mean Daily Flow (CFS) Study Period /1/2004 3/1/2004 5/1/2004 7/1/2004 9/1/ /1/2004 1/1/2005 3/1/2005 5/1/2005 7/1/2005 9/1/ /1/2005 1/1/2006 3/1/2006 5/1/2006 7/1/2006 9/1/ /1/2006 1/1/2007 3/1/2007 5/1/2007 7/1/2007 9/1/ /1/2007

13 Study Design

14 Study Design

15 158 Fishes and Swimming Invertebrates

16 Multi-bay Comparison

17 Multi-bay Comparison

18 Multi-bay Comparison Small Seines Total Fish

19 Multi-bay Comparison Small Seines MDS; 2D Stress: Bay Gasparilla Sound Pine Island Sound San Carlos Bay Estero Bay Similarity

20 Small Seines Multi-bay Comparison SIMPER; 81% Dissimilarity

21 Multi-bay Comparison Large Haul Seines Total Fish

22 Multi-bay Comparison Large Haul Seines MDS; 2D Stress: 0.08 Bay Gasparilla Sound Pine Island Sound San Carlos Bay Estero Bay Similarity

23 Large Haul Seines Multi-bay Comparison SIMPER; 81% Dissimilarity

24 Multi-bay Comparison Trawl Total Fish

25 Multi-bay Comparison Trawl 2007 MDS; 2D Stress: Bay Gasparilla Sound Pine Island Sound San Carlos Bay Estero Bay Similarity

26 Trawl Multi-bay Comparison SIMPER; 84% Dissimilarity

27 Estero Bay Tributaries Imperial Mullock Mullock Mullock 2D Stress: 0.14 season_wateryear MayOct_2005 NovApr_2006 MayOct_2006 NovApr_2007 MayOct_2007 Imperial Mullock Hendry Imperial Hendry Hendry Imperial Mullock Hendry Imperial Hendry

28 Species Profiles Blue crab Red drum Striped mullet Pink shrimp Common snook Striped mojarra Bay anchovy Hogchoker Southern kingfish Pinfish

29 Species Profiles When are species present? Geometric mean abundance.100 m -2 ± 95% CL (bars) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Mean length (mm) ± SE (points/lines) e.g., pink shrimp from the Estero Bay estuary (21.3-m seines)

30 Species Profiles Where are species found? Geometric mean abundance.100 m -2 ± 95% CL Estero Bay Hendry Creek Mullock Creek Estero River Spring Creek Imperial River e.g., common snook from the Estero Bay estuary (21.3-m seines)

31 Species Profiles At what salinities are species found in the river? Geometric mean abundance.100 m -2 ± 95% CL >=30 e.g., Striped anchovy from the Estero Bay estuary (21.3-m seines) Salinity

32 Species Profiles What habitats do they occupy? Geometric mean abundance.100 m -2 ± 95% CL unvegetated <=50% veg. >50% veg. mangrove other e.g., pink shrimp from the Estero Bay estuary (21.3-m seines) Habitat

33 Species Profiles Response to Inflow? ln(catch-per-unit-effort, animals.100m -2 ) Lagodon rhomboides (21.3-m seine): Bay Sizes:<=150mm Feb. to Jun. y = x Adj. r 2 = e.g., pinfish in the Estero Bay (21.3-m seines) ln(168-day-lagged inflow + 1, cfs)

34 Species Profiles Response to Inflow? 3.0 Farfantepenaeus duorarum (21.3-m seine): Tributaries ln(catch-per-unit-effort, animals.100m -2 ) Sizes:<=150mm Jun. to Oct. y = x x 2 Adj. r 2 = e.g., pink shrimp in the Estero Bay tributaries (21.3- m seines) ln(7-day-lagged inflow + 1, cfs)

35 Estero Bay estuary Current Knowledge Fish assemblages under current water management Baseline indices of relative abundance for important species Distribution and abundance of exotic fishes Fish health background levels Stochastic events regional or specific to river

36 Thank you! Charlotte Harbor Field Lab 585 Prineville St. Port Charlotte, FL Phone: (941) Staff: Philip Stevens Chuck Idelberger Dave Blewett Bill Curnow Gregg Poulakis Sarah Erickson John Hadden Toni Yard Julia Shaw Amy Timmers Scott Leonard Chrystal Murray