Open_Data/Tomoka_River_1985_1987_Manatee_Distribution_Survey

View In: ArcGIS JavaScript ArcGIS Online Map Viewer ArcGIS Earth ArcGIS Pro

Service Description: Aerial distribution surveys are used by marine mammal biologists from FWC 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. Small helicopters may be used instead of fixed wing aircraft in urban areas or where waters are particularly opaque and hovering may be required. Flights are usually five hours long and are most commonly flown every two weeks for six months. The surveys are designed to maximize the manatee counts by concentrating on shallow nearshore waters around the state where manatees and their primary food source, sea grasses, are located. Flight paths curve parallel to the shoreline, and the airplane circles when manatees are spotted until a count of the number of animals in each group is obtained. Offshore waters are usually not surveyed. Dolphin and sea turtle sightings are recorded opportunistically. All aerial data are recorded on paper maps and entered into a GIS shapefile for spatial analysis. GIS is a computer software system for representing data spatially and for conducting spatial analyses. Surveys of Volusia County (Tomoka River) were flown twice a month from December 1985 to January 1987. Staff from FWC, USFWS Sirenia Project, Brevard County and Hobe Sound NWR were observers for these flights. This survey was flown as a part of a larger study that included six east coast counties divided into five survey segments from north to south; Volusia and N. Brevard counties were within segment 1. The survey area includes the Tomoka Basin and Tomoka River.

Map Name: Open Data Manatee

Legend

All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers:

Tomoka River 1985-1987 Manatee Distribution Survey Observations (4)

Description: Aerial distribution surveys are used by marine mammal biologists from FWC 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. Small helicopters may be used instead of fixed wing aircraft in urban areas or where waters are particularly opaque and hovering may be required. Flights are usually five hours long and are most commonly flown every two weeks for six months. The surveys are designed to maximize the manatee counts by concentrating on shallow nearshore waters around the state where manatees and their primary food source, sea grasses, are located. Flight paths curve parallel to the shoreline, and the airplane circles when manatees are spotted until a count of the number of animals in each group is obtained. Offshore waters are usually not surveyed. Dolphin and sea turtle sightings are recorded opportunistically. All aerial data are recorded on paper maps and entered into a GIS shapefile for spatial analysis. GIS is a computer software system for representing data spatially and for conducting spatial analyses. Surveys of Volusia County (Tomoka River) were flown twice a month from December 1985 to January 1987. Staff from FWC, USFWS Sirenia Project, Brevard County and Hobe Sound NWR were observers for these flights. This survey was flown as a part of a larger study that included six east coast counties divided into five survey segments from north to south; Volusia and N. Brevard counties were within segment 1. The survey area includes the Tomoka Basin and Tomoka River.

Service Item Id: f9fca67218b040169a63fd979dedc901

Copyright Text: Flights were flown and data were collected by FWC, USFWS Sirenia Project, Brevard County and Hobe Sound NWR staff. Data were entered and verified 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."

Spatial Reference: 102967 (6439) LatestVCSWkid(0)

Single Fused Map Cache: false

Initial Extent:

Full Extent:

Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info:

Supports Dynamic Layers: true

MaxRecordCount: 2000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON, PBF

Supports Query Data Elements: true

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true

Child Resources: Info Dynamic Layer

Supported Operations: Export Map Identify QueryLegends QueryDomains Find Return Updates

Open_Data/Tomoka_River_1985_1987_Manatee_Distribution_Survey_Observations (MapServer)