Layer: Volusia County 2023 - 2024 Manatee Distribution Survey Flight Path (ID: 67)

Name: Volusia County 2023 - 2024 Manatee Distribution Survey Flight Path

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Description: Aerial distribution surveys are used by marine mammal biologists from Florida Fish & Wildlife Conservation Commission-Fish and Wildlife Research Institute (FWC-FWRI) and other agencies to determine the seasonal distribution of manatees. Most surveys are conducted from small, four-seat, high-winged airplanes (Cessna 172 or 182) flying at a height of 500-1000 ft at a speed of 70-90 kts. This survey was conducted by one aircraft mostly following historical flight paths used for past county-wide distribution surveys. However, some changes were made to shorten the flight route or to cover areas not flown in previous surveys. Flight paths generally curved parallel to the shoreline, and the airplane circled when manatees were spotted until a count of the number of animals in each group was obtained. Circling was limited to 3 passes unless a group was unusually large and aerial photos were used in some cases to confirm counts. Sightings data were recorded on paper maps and entered into a GIS shapefile for spatial analysis using NAIP 2023 imagery and recorded flight paths as a reference. GIS is a computer software system for representing data spatially and for conducting spatial analyses. This dataset includes recorded flight paths from 21 surveys flown on the following dates: 2 and 23 Aug 2023; 1 and 25 Sept 2023; 18 and 26 October 2023; 21 and 30 November 2023; 19 December 2023; 10 and 23 January 2024; 22 and 27 February 2024; 1 and 18 April 2024; 2 and 24 May 2024; 17 and 26 June 2024; 11 and 26 July 2024. Flight path records were obtained from GPS devices or downloaded from FlightAware (https://flightaware.com) where GPS data were not available. Tracklines were edited to remove transit and off-effort tracks. FWC staff members were primary observers for these flights, and dual observers (two observers, one in the front seat and one in the rear seat) were present on some or all survey flights. The survey area includes coastal areas of Volusia County, Florida from the Flagler-Volusia County line to the Volusia-Brevard County line at the southern end of Mosquito Lagoon.

Copyright Text: Flights were flown and data were collected by staff from Florida Fish & Wildlife Conservation Commission. Use of these data must be credited in any reports or other written publications by the following sentence: "Manatee specific data used in analyses were collected under scientific research permit #MA773494 issued to FWC-FWRI."

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OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
SurveyDate ( type: esriFieldTypeDate, alias: SurveyDate, length: 8 )
Length_km ( type: esriFieldTypeDouble, alias: Length_km )
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