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(Archived Projects)
Gulf Green Turtle Project 2016-2019
Farnek +
169438 +
170125 +
Tortugas carey en el Pacifico Mexicano.
Luna +
Western Australia rehabilitated turtles
Mandy +
Leftie +
Garrett +
Sebastian +
Lockyer +
Fifi +
Terry +
Franklin +
Mossy +
Vixen +
Israel's sea turtle monitoring program
Ninja +
Pinto +
Juvenile loggerheads: Canary Islands reintroduction program
NT +
Tropi +
Tomás +
Oasis Dream +
Martina +
Turks and Caicos Islands Turtle Project 2009 to 2018: Green & Hawksbill Turtles
Fisheries NSW shark tracking
Shark 40 +
Shark 52 +
Shark 28 +
Shark 41 +
Shark 234 +
Shark 229 +
Shark 179 +
Tiger 29 +
Tiger 32 +
Tiger 33 +
Ningaloo Outlook turtle tracking
Nancy +
SharkyDJ - Requins baleines Djibouti
Western Australian Loggerheads - Gnaraloo Bay and Gnaraloo Cape Farquhar 2015-2018
Gnargoo +
Baiyungu +
Kimberley - flatbacks
Nagula Jarndu +
Jani Bibi +
Chunky +
Pinky +
Pilbara - flatbacks
Delambre 43687 +
Delambre 43691 +
Dubai Turtle Rehabilitation Project
Dubai Turtle Rehabilitation Project
Thevenard Island - Flatbacks
Turtley Awesome
Queensland: K'gari (Fraser Island) nesting Green and Loggerhead turtles 2017-18
Cc Burnett Mary (BMRG) +
Cc Mibir - Milbi +
* Lower Mary (LMRL&CCG Inc) +
* Liberty Sand Angels (Sirtrack)
* Cynthettica +
* Kim Jenna (QPWS) +
* Sophie-Emily Kirralee +
Buck Island Turtles
Raine Island Recovery Project - green turtle satellite tracking
45771 +
45788 +
Seguimiento de 10 crías de tortuga boba nacidas en 2016 en el litoral valenciano, en el marco del Proyecto LIFE 15 IPE ES 012
Tracking small loggerheads from spanish nests
Tras la Ruta de Las Tortugas Golfinas.....ZIVA...2017 !!!!
Ziva +
Georgia Whimbrels
Sachem +
WWF Sea Turtle Satellite Tracking in Latin America and the Caribbean
María Sofia II
Montgomery Reef green turtles
Ray Ray
Dry Tortugas Sea Turtles
Priscilla-recap*- +
Damien +
Ariya +
Hawksbill Hope & Marymount University
Hope 4 Nature
Yertle the Turtle of Hope for GPWS
Milky Way Hope for GPWS
Black-bellied Plover Tracking (Canada)
Qirniqtaq +
Nuliaq +
Nammagaaq +
Dalyan turtles 2017
Zeynep Çiçek +
Iniciativa Carey del Pacifico Oriental - ICAPO - Eastern Pacific Hawksbill Initiative
Turtle Marta
North Cyprus 2017
Nehir +
Alpadeo +
Tracking Common Tern Migration
169743 +
169744 +
Ningaloo Outlook Whale Shark tracking
Doug +
LMC Tracking
Lilly +
Veracruz, Mexico Kemp's Ridley Tracking-2017
Tasñepu +
Kimberly +
Bella Luz +
Maura +
Yosahandy +
Karina +
Zahoryt +
Semjase +
Asket +
Nera +
Chencha +
Kika +
Juana +
Florinda +
Padre Island National Seashore Kemp's Ridley Tracking Program-2017
Shelley +
152827 +
152828 +
152829 +
165845 +
165846 +
165850 +
Montebello Islands Marine Park
Flippers +
Bubbles +
Eighty Mile Beach flatbacks
Janet +
Cape Domett flatbacks
Riley +
Whimbrel Tracking in the Americas
Lamèque +
Maranhão +
Upinraaq +
Conway +
Whimbrel Tracking on the Acadian Peninsula
Lamèque +
Maranhão +
Conway +
Mackenzie Delta Shorebirds
Lamèque +
Maranhão +
Upinraaq +
Padre Island National Seashore Kemp's Ridley Tracking Program-2016
152800 +
152801 +
152805 +
152808 +
Everglades Loggerheads
Septima +
Rancho Nuevo, Mexico Kemp's Ridley Tracking-2016
Elena +
Carmen +
Anahi +
Javiera +
Veracruz, Mexico Kemp's Ridley Tracking-2016
Reyna +
Manzanita +
Rafaela +
Breeding and foraging ecology, threats, and causes of decline of Reddish Egrets in Florida
Ding #1
Rosemary Island hawksbill turtles
Mayu +
Kentucky Bald Eagles
Shaggy +
Migration of Long-billed Curlews from the Intermountain West
AA - Frank (ACEC) +
Salish sea harbor seal foraging study 2014
ID#6 YL1689 137169
Contributions of satellite telemetry to the conservation of White-crowned Pigeons throughout the Caribbean
Movements of Magnificent Frigatebirds from communal roosts and nest sites in the Florida Keys
Dry Tortugas Male +
Skagit Valley / Wrangel Island Snow Goose
Adult Female LSSG 127446 +
Adult Female LSSG 127447 +
Adult Female LSSG 127450 +
Swallow-tailed Kite roost sites, migration, and conservation opportunities
Palmetto +
Bald and Golden Eagles of the Chesapeake Bay, USA
Albany +
Salluit +

Satellite Tracking

This free resource is made possible by donations from seaturtle.org supporters - if you find the Sea Turtle Satellite Tracking Project helpful, consider making a donation today!

Frequently Asked Questions

Why did animal X stop transmitting?

The most common reason for a lack of transmissions for one or two days is a change in the tracked animal's behavior. For example, as water temperatures cool, sea turtles may spend large amounts of time on the seabed effectively 'hibernating'; only coming up for air a few times a day. Because transmissions can only be picked up during short windows of time when Argos-receiving satellites are overhead, this means that there may be periods of one or more days with no transmissions received.

Eventually, however, all transmitters stop sending information. There are a whole suite of reasons why we might cease to receive transmissions from one of the animals we are tracking:

Dead Battery: It appears from the results of most workers that few transmitters actually reach the end of their working battery life with some other factor being responsible for premature cessation of transmissions. Most sea turtle transmitters will only actively try and send data to the satellite when the turtle is at the surface (see Saltwater Switch Failure below). Given that most turtles spend >97% of their time submerged and, even the smallest of transmitters have a battery life of some 20 days or more, most should last at least a year.

Attachment Failure: The material used to attach the transmitter to the animal may have failed. For example, sea turtles are known to like to hide under rocks and submerged reefs when resting and loggerhead turtles have even been observed 'scratching' their backs on these reefs, possibly to reduce often heavy barnacle loads. These behaviours may dislodge the transmitter. Satellite transmitters typically do not float so when they are dislodged, they fall to the seabed and will not send anymore effective signals. Our attachment methods have improved greatly over the years and a transmitter can be expected to remain attached to a turtle for a year or morewhich is long enough for us to observe migratory routes and describe feeding locations.

Antenna Failure: The animal may damage the transmitter antenna through repeated impact with another object. For example, the back scratching behavior mentioned above for sea turtle may result in damage to the antenna. Many turtle biologists feel that this is the number one reason for transmitter failure despite efforts to design more sturdy antennae.

Saltwater Switch Failure: To extend battery life most transmitters applied to sea turtles have a saltwater switch which tells the transmitter when it is at the surface of the water, allowing economic use of battery power. A transmitter may become fouled with marine organisms, such as algae, which may temporarily inhibit the saltwater switch and cause the transmitter to be unable to recognize when the turtle is at the surface. If a more permanent attachment by a marine organism occurs, such as an encrusting coral species, mussels or barnacles, then transmission may be permanently inhibited, even though the batteries are not dead.

Mortality: Many of the animals tracked by satellite belong to species of conservation concern. This is one of the reasons that justifies the use of relatively expensive satellite tracking. These species are of conservation concern for a reason and can often be found on national and international endangered species lists because their populations have become reduced, purposefully or accidentally, through human activities. For example, many sea turtles each year are captured in marine fisheries and a proportion are killed. Often these events can be identified as suddenly changing transmission frequency and location quality increase, often suggesting fast linear movements towards fishing harbours (i.e. movement of the fishing vessel). Transmitters with depth sensors or surface counters sometimes send data showing the transmitter at the surface. Undoubtedly, however, in a proportion of cases the capture event could occur when there are no satellites overhead and the transmitter is irretrievable damaged or discarded either with or separately from the turtle before a transmission indicating the capture can be received.

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