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Tilefish Habitat Characterization in and Around the Miami, FL Ocean

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Tilefish Habitat Characterization in and Around the Miami, FL Ocean FINAL REPORT TILEFISH (MALACANTHIDAE) HABITAT CHARACTERIZATION IN AND AROUND THE MIAMI, FLORIDA, OCEAN DREDGED MATERIAL DISPOSAL SITE USING 1986 VIDEOGRAPHIC DATA Contract W912EP-09-D-0013-0008 Prepared for U.S. Army Corps of Engineers, Jacksonville District 701 San Marco Boulevard Jacksonville, Florida 32207-8175 Prepared by ANAMAR Environmental Consulting, Inc. 2106 NW 67th Place, Suite 5 Gainesville, Florida 32653 (ANAMAR Project #09-0012) In Collaboration with Harbor Branch Oceanographic Institute at Florida Atlantic University 5600 U.S. 1, North Fort Pierce, Florida 34946 August 2010 Tilefish (Malacanthidae) Habitat Characterization in and around the Miami, Florida, ODMDS Using 1986 Videographic Data TABLE OF CONTENTS Executive Summary ....................................................................................................................1 1.0 INTRODUCTION ................................................................................................................6 1.1 Background ...............................................................................................................6 1.2 Objectives .................................................................................................................6 1.3 Brief Introduction to Blueline and Golden Tilefishes ......................................................7 2.0 METHODS ....................................................................................................................... 11 2.1 Historical Data ......................................................................................................... 11 2.2 ROV Navigation, Video Transects .............................................................................. 11 2.3 Video Analysis ......................................................................................................... 12 2.3.1 Field of View Estimation ................................................................................ 13 2.4 Habitat Characterization ........................................................................................... 14 2.5 Faunal Characterization ............................................................................................ 14 2.6 Terminology and Definitions ..................................................................................... 14 2.6.1 Bioturbation ................................................................................................. 14 2.7 Quality Assurance/Quality Control ............................................................................. 15 3.0 RESULTS ........................................................................................................................ 18 3.1 Physical Data .......................................................................................................... 18 3.2 ROV Video Quality ................................................................................................... 19 3.3 ROV Transect Summary ........................................................................................... 20 3.4 ROV Navigation and Transects .................................................................................. 20 3.5 ROV Transect Notes ................................................................................................. 21 3.5.1 Video Transect-1 (VT-1) ............................................................................... 21 3.5.2 Video Transect-2 (VT-2) ............................................................................... 22 3.5.3 Video Transect-3 (VT-3) ............................................................................... 22 3.5.4 Video Transect-4 (VT-4) ............................................................................... 23 3.6 Faunal Identifications and Distribution ....................................................................... 24 3.6.1 Fish Occurrence and Distribution ................................................................... 26 3.6.2 Tilefish Observations .................................................................................... 26 3.6.3 Benthic Invertebrate Occurrence and Distribution ........................................... 29 3.7 Substrate Types ...................................................................................................... 32 3.8 Bioturbation ............................................................................................................ 34 3.8.1 Tilefish Burrows ........................................................................................... 35 4.0 DISCUSSION ................................................................................................................... 42 4.1 Determination of Bioturbators ................................................................................... 42 4.1.1 Conical Mounds, Depressions, and Craters ................................................................. 42 4.2 Determination of Tilefish Burrows ............................................................................. 42 4.2.1 Shape and Size of Burrows ............................................................................ 43 4.2.2 Depth and Distribution .................................................................................. 43 4.2.3 Temperature Preferences .............................................................................. 43 4.2.4 Sediment Preferences ................................................................................... 44 4.3 Active versus Inactive Burrows ................................................................................. 45 4.4 Identification of Golden Tilefish ................................................................................ 45 4.5 Associated Fauna ..................................................................................................... 45 4.5.1 Potential Tilefish Prey ................................................................................... 45 4.5.2 Species of Management Interest ................................................................... 46 4.6 Tilefish Burrow Densities .......................................................................................... 46 4.6.1 Estimated Tilefish Habitat within and Adjacent to the Miami ODMDS ................ 47 4.6.2 Managed Species Possibly Benefited by Rock Rubble Disposal ......................... 48 5.0 ACKNOWLEDGEMENTS AND ADDITIONAL FUNDING .......................................................... 51 6.0 LITERATURE CITED ......................................................................................................... 52 i Tilefish (Malacanthidae) Habitat Characterization in and around the Miami, Florida, ODMDS Using 1986 Videographic Data FIGURES Figure 1 The Golden Tilefish (Lopholatilus chamaeleonticeps) ....................................................8 Figure 2 Golden Tilefish (Lopholatilus chamaeleonticeps) Caught off Campeche Bank, Mexico ......9 Figure 3 Blueline Tilefish (Caulolatilus microps) Caught off Campeche Bank, Mexico ...................9 Figure 4 Artist Depiction of Golden Tilefish (Lopholatilus chamaeleonticeps) Burrow in Cross Section .......................................................................................................... 10 Figure 5 Golden Tilefish (Lopholatilus chamaeleonticeps) Hovering at Burrow Entrance ............. 10 Figure 6 Video Transect 4 of the 1986 Miami ODMDS ROV Survey as Plotted Using the Coordinates Given by Conservation Consultants (1986) .............................................. 21 Figure 7 Fish Photographs (from Video Frame Grabs) from ROV Video Transects ...................... 28 Figures 8 Additional Fish Photographs (from Video Frame Grabs) from ROV Video Transects ....... 28 Figures 9 Invertebrate Photographs (from Video Frame Grabs) from ROV Video Transects .......... 31 Figures 10 Additional Invertebrate Photographs (from Video Frame Grabs) from ROV Video Transects ................................................................................................................ 32 Figure 11 Percent Cover of Bottom Types over All ROV Transects .............................................. 33 Figure 12 Substrate, Bioturbation, and Debris Photographs (from Video Frame Grabs) from ROV Video Transects ............................................................................................... 35 Figure 13 Percentage of 2-Minute Intervals with Sightings of Potential Tilefish Burrows, Possible Tilefish Burrows, Dense Mound Bioturbations, Visual Sightings of Golden Tilefish (Lopholatilus chamaeleonticeps) ......................................................... 37 Figure 14 Potential Tilefish Burrow Photographs (from Video Frame Grabs) from ROV Video Transects ....................................................................................................... 38 Figure 15 Mean Number of Tilefish Burrows per 2-Minute Increment for Each ROV Video Transect ................................................................................................. 41 Figure 16 108 kg Warsaw Grouper (Epinephelus nigritus) Caught off Naples, Florida ................... 49 i Tilefish (Malacanthidae) Habitat Characterization in and around the Miami, Florida, ODMDS Using 1986 Videographic Data TABLES Table 1 List of Specialized Scientists Contacted to Review Video Excerpts ................................ 17 Table 2 Sediment Composition, Depths, and Temperatures Taken Within and Adjacent to the Miami ODMDS
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