Name: Tampa Bay 2023-2024 Manatee Distribution Survey Observations

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Description: Aerial distribution surveys are used by marine mammal biologists from Florida Fish & Wildlife Conservation Commission-Fish & 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 paths. See trackline metadata for details of flight path modifications. 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 2021 - 2022 imagery and recorded flight paths as a reference. GIS is a computer software system for representing data spatially and for conducting spatial analyses. Counts presented in this dataset have not been corrected for detection bias (either perception or availability) and the absence of sightings in an area does not mean that no animals were present. This dataset includes recorded manatee sightings from 24 surveys flown on the following dates: 13 September 2023; 6 and 23 October 2023; 18 and 29 November 2023; 5 and 29 December 2023; 18 and 26 January 2024; 16 and 27 February 2024; 7 and 25 March 2024; 9 and 17 April 2024; 3 and 30 May 2024; 4 and 26 June 2024; 23 and 27 July 2024; 12 and 27 August 2024; 12 September 2024. FWC or Mote Marine Laboratory 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 the coastal areas of Tampa Bay, Florida from the Hillsborough-Manatee County line to Coffee Pot Bayou in southern Pinellas County. Some areas along the planned flight path may have been partially surveyed or not surveyed at all due to air traffic, weather, or other constraints present during individual surveys.

Copyright Text: Flights were flown and data were collected by staff from Florida Fish & Wildlife Conservation Commission and Mote Marine Laboratory. Data were entered by FWC staff. 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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