Dry Tortugas

General Information

Project Type(s):capture

Site Name:Dry Tortugas

Site Reference Number:56

Region(s):Southwest

Counties:Monroe

Approximate Latitude: 24.62 Approximate Longitude: -82.87

View ArcGIS map of study area

Principal Investigator(s):Hart, Kristen

Point(s) of Contact:Hart, Kristen - Phone Number: (954) 650-0336, Email: Kristen_Hart@usgs.gov

Organizations Involved:United States Geological Survey - Davie Field Office

Organization Type(s):federal agency

Project Status: Active

Start Date: 5/2008

End Date: n/a

Equipment and Methods

General Method(s) Used:boat survey, dip net, rodeo, set net

Sampling and Effort

	Visual	Capture
Sampling regime:	opportunistically	opportunistically
Measure of effort:	unknown	cap/time

Bottom Type(s):coral, sand

Water Type Zone: neritic Water Type Environment: marine

Min. Depth (m): 0 Max. Depth (m): 0

Mean Depth (m): 0

Captures and Sightings Information

Species	No. of Captures	No. of Sightings	Min Size* (cm)	Max Size* (cm)	Mean Size* (cm)	FP Observed	Life Stages**
Green Turtle (Cm)	98	324	22.7	98.1	52.0	No	O, N, S, A
Loggerhead (Cc)	41	20	64.8	83.7	74.4	No	N, S, A
Kemp's Ridley (Lk)	0	0	n/a	n/a	n/a	n/a	n/a
Hawksbill (Ei)	6	8	16.5	69.8	50.3	No	O, N, S
Leatherback (Dc)	0	0	n/a	n/a	n/a	n/a	n/a

*All size measurements are SSCL unless otherwise indicated
** For Cm, Cc, Lk, & Ei: O - Oceanic-stage juvenile; N - Neritic-stage juvenile; S - Subadult; A - Adult. For Dc: I - Immature; A - Adult. n/a = not applicable; n/r = not reported.

This report adheres to the following size ranges for life stage classification for these species:

	Green turtle	Loggerhead	Kemp's ridley	Hawksbill
Oceanic-stage juvenile	< 25 cm SCL	< 30 cm SCL	< 25 cm SCL	< 25 cm SCL
Neritic-stage juvenile	25-69 cm SCL	30-69 cm SCL	25-39 cm SCL	25-64 cm SCL
Subadult	70-84 cm SCL	70-79 cm SCL	40-59 cm SCL	65-74 cm SCL
Adult	≥ 85 cm SCL	≥ 80 cm SCL	≥ 60 cm SCL	≥ 75 cm SCL

	Leatherback
Immature	< 135 cm OCL
Adult	≥ 135 cm OCL

Other Information Collected

diet

growth rates

satellite tracking

sonic tracking

stable isotopes

Project Summary

Documents

File Name	Type	Description
Hart_etal_2010.pdf	Journal Article
Hart_etal_2012.pdf	Journal Article

* This document is available from FWC by request. Email SeaTurtleData@MyFWC.com if you would like a copy. Please include both the project name and file name in your email.
** This document has been provided to FWC but is unavailable for download. Please contact the project PI if you would like a copy.

Literature/Reports Produced

Hart, K., D. Zawada, I. Fujisaki, B. Lidz. 2010. Inter-nesting habitat-use patterns of loggerhead sea turtles: enhancing satellite tracking with benthic mapping. Aquat. Biol. 11:77-90.

Hart, K., M. Lamont, I. Fujisaki, A. Tucker, R. Carthy. 2012. Common coastal foraging areas for loggerheads in the Gulf of Mexico: Opportunities for marine conservation. Biol. Cons. 145: 185-194.