2004 UC Proceedings Abstract

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GIS Analysis of Common Snook Movement Patterns in Southeast Florida
Track: Ocean, Coastal, and Marine Resources
Author(s): Jesse Lewis, Alexis Trotter, Warren Mitchell, James Whittington

Along the southeast coast of Florida, researchers tagged 19,410 common snook, Centropomus undecimalis, between 1983 and 1997. Through October 2001, scientists recaptured 4,464 of these tagged fish and recorded enough information to determine seasonal movement patterns. These patterns were determined by calculating the distance and direction snook traveled along the most direct inshore path. To accomplish this, a network data model was created using a combination of ArcGIS, ArcEdit, and ArcPlot. In addition to the network analysis, temporal mapping was performed using ArcGIS Tracking Analyst. Results from the analysis and mapping further exemplify fisheries biologists' earliest estimates of movement patterns. During the late April through early October (spawning season), adult snook were typically reported in major inlets and along adjacent beaches. From November through March, snook were reported inland in lower-salinity estuaries and freshwater habitats.

Jesse Lewis
Florida Marine Research Institute
Coastal and Marine Resource Assessment
100 8th Ave SE
St. Petersburg , FL 33701
US
Phone: 727-896-8626
Fax: 727-893-1679
E-mail: jesse.lewis@fwc.state.fl.us

Alexis Trotter
Florida Marine Research Institute
Fisheries Biology
100 8th Ave SE
Saint Petersburg , FL 33701
US
Phone: 727-896-8626
E-mail: alexis.trotter@fwc.state.fl.us

Warren Mitchell
Florida Marine Research Institute
Fisheries Biology
100 8th Ave SE
Saint Petersburg , FL 33701
US
Phone: 727-896-8626
E-mail: wamitch@hotmail.com

James Whittington
Florida Marine Research Institute
Fisheries Biology
P.O. Box 3478
Tequesta , FL 33469
US
Phone: 561-575-5408
E-mail: jim.whittington@fwc.state.fl.us