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GIS Project to Categorize and Map Smalltooth Sawfish (Pristis pectinata) Shoreline and Nearshore Habitat Features in Southwest Florida

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Date
2022-04-22
Author
Dar, Rabiya
Advisor
Halpin, Patrick
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Abstract
This project was conducted in cooperation with NOAA Fisheries to support the management of smalltooth sawfish (Pristis pectinata) in Charlotte Harbor, Florida. Smalltooth sawfish have experienced a serious decline in their range due to commercial and recreational fishing, entanglement, illegal trade, and coastal development. In the United States, they once ranged from Texas to North Carolina, but are now only found in parts of southern Florida. NOAA Fisheries manages smalltooth sawfish under the purview of the Endangered Species Act and has designated Charlotte Harbor and the Ten Thousand Islands/Everglades as critical habitat units for the U.S. distinct population of this species. These areas were chosen as they have an abundance of mangroves in shallow, euryhaline water which is prime nursery habitat for sawfish. This project focuses on the Charlotte Harbor unit of critical habitat and utilizes ArcGIS to categorize the shoreline with emphasis on classifying and analyzing mangroves to identify priority sawfish habitat. A supervised classification using the maximum likelihood classification method is used to categorize the shoreline into three classes: mangrove, other vegetation, and non-vegetation. Classified mangroves are then analyzed to identify contiguous mangrove patches, mangrove distance to shoreline, and mangrove neighborhood density. The products from this project will be combined with other datasets to develop a sawfish distribution model. Such a model could be useful in predicting sawfish abundance across seascapes to promote better management of this endangered species.
Type
Master's project
Department
Nicholas School of the Environment
Subject
smalltooth sawfish
ArcGIS
mangrove
critical habitat
NOAA Fisheries
habitat mapping
Permalink
https://hdl.handle.net/10161/24874
Citation
Dar, Rabiya (2022). GIS Project to Categorize and Map Smalltooth Sawfish (Pristis pectinata) Shoreline and Nearshore Habitat Features in Southwest Florida. Master's project, Duke University. Retrieved from https://hdl.handle.net/10161/24874.
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This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.

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