FWRI EPDC NonNeonate SeaTurtle Observations

Blair Witherington, Florida Fish and Wildlife Conservation Commission - Fish and Wildlife Research Institute
Robert Hardy, Florida Fish and Wildlife Conservation Commission - Fish and Wildlife Research Institute

These data describe observations of subadult and adult sea turtles that were observed by Florida Fish and Wildlife Conservation Commission (FWC) staff ancillary to a study of the ecology of neonate sea turtles inhabiting epipelagic drift communities of the eastern Gulf of Mexico. Animals were observed by researchers aboard an 8.2 m power catamaran vessel launched from four ports along the west coast of Florida (Pensacola, Apalachicola, Sarasota, and Marco Island), United States. Researchers observed aggregations of loggerheads in the Eastern Gulf of Mexico, off Florida's west coast, during twelve sampling trips in August 2005, June 2006, July 2008 and August 2008. Observations of juvenile, subadult and adult loggerheads are rare in this study and considered ancillary as the effort targets posthatchling (> 10 cm straight carapace length) sea turtles inhabiting lines of floating pelagic debris and Sargassum. Loggerhead turtle sizes included three groupings: Adult (> 90 cm SCL), Subadult (45-90 cm SCL), and Juvenile (< 45 cm SCL). During this time 78 loggerheads (Caretta caretta), 1 Kemp's ridley (Lepidochelys kempii), and 2 unidentified turtles were observed. Sea turtle observations were made by two experienced observers who kept watch for sargassum habitat (for neonate studies) and large turtles (to avoid collisions). Vessel paths fanned out from each port to depths up to 300 m, with a mean path approximately perpendicular to the coastline.

These data describe the geographic positions of juvenile, subadult, and adult sea turtle observations which were made ancillary to a long-term study of the ecology of neonate sea turtles inhabiting epipelagic drift communities of the eastern Gulf of Mexico. Attributes describe the date of observation, species, age class, latitude, longitude, the distance from transect to observation, and city of the port of departure.

Prior to July 1, 2004, the Fish and Wildlife Research Institute (FWRI) was known as the Florida Marine Research Institute (FMRI). The institute name has not been changed in historical data sets or references to work completed by the Florida Marine Research Institute. The institute name has been changed in references to ongoing research, new research, and contact information.

Overview

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Attributes in dataset

Attribute (table column)	Description
oid	Unique ID number (generated by OBIS-SEAMAP)
obs_datetime	date of observation (time component is not provided and expressed as 00:00:00)
species	Scientific name of the species observed.
sp_tsn	Taxonomic Serial Number added by OBIS-SEAMAP
obs_count	animal count
age	age class of observed animal estimated from size
latitude	latitude of boat location at time of observation in decimal degrees
longitude	longitude of boat location at time of observation in decimal degrees
trns_dst	distance from the transect (boat location) to the observed animal in meters
marina	city of port of departure
geom	Geometry field added by OBIS-SEAMAP