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General => General Technical Chat => Topic started by: Lawsen on September 27, 2011, 07:12:37 am

Title: Large reptilians are often mounted with GPS located radio tracking device.
Post by: Lawsen on September 27, 2011, 07:12:37 am
Large reptiles like crocodiles and pelagic sea turtles are often mounted with GPS located radio transmitter tracking device.  The device is epoxy/resin glued onto the carapace of the turtle or rough leathery skin of the crocodile, while in a tranquilized state, scary. 

http://www.seaturtle.org/tracking/?tag_id=85691 (http://www.seaturtle.org/tracking/?tag_id=85691)

http://www.seaturtle.org/imagelib/?photo=3358 (http://www.seaturtle.org/imagelib/?photo=3358)

http://www.seaturtle.org/tagging/satellite.shtml (http://www.seaturtle.org/tagging/satellite.shtml)

One radio tag per sea turtle costs $3,000.00 USD with satellite time.  The turtle has to swim with added weight on their carapace shell, thus cause hydrodynamic drag, thus a discomfort for the pelagic animal to swim.

Reptile tracking devices are made by:
Sea Mammal Research Unit, U.K, Sirtrack, New Zealand, Telonics, U.S.A., and Wildlife Computers, U.S.A.

Alejandro Fallabrino picture showing a turtle enthusiast searches for the radio tag sea turtles with a large directional Yagi-Uda antenna with reflector element and driven half wave (usually) dipole antenna:

http://www.seaturtle.org/imagelib/?photo=1781 (http://www.seaturtle.org/imagelib/?photo=1781)

http://en.wikipedia.org/wiki/Yagi_antenna (http://en.wikipedia.org/wiki/Yagi_antenna)
Title: Re: Large reptilians are often mounted with GPS located radio tracking device.
Post by: Time on September 27, 2011, 12:40:28 pm
Where is the antenna in that picture, I don't see it.
Title: Re: Large reptilians are often mounted with GPS located radio tracking device.
Post by: slateraptor on September 27, 2011, 01:05:31 pm
She can track my enthusiastic turtle any time. ;)
Title: Re: Large reptilians are often mounted with GPS located radio tracking device.
Post by: Achilles on September 27, 2011, 04:02:14 pm
Hmmm, not that uncommon.
I have met an herpetologist who tracked little poison part frogs (about 1inch in size) with transpoders. They made something similar in a big tropic hall in the Zoo of Zürich.
The Idea was to look for moving patterns of individual animals and get a view on their social behaviour.
...lucky guy who can build all that stuff and play with it ;)
Title: Re: Large reptilians are often mounted with GPS located radio tracking device.
Post by: Mechatrommer on September 28, 2011, 06:43:47 am
Quote from: Time on September 27, 2011, 12:40:28 pm
Where is the antenna in that picture, I don't see it.
maybe a "bigger" and "longer" "unipole antenna" is better for her.
(http://www.skylighters.org/wwiirr/railway1.jpg)
Title: Re: Large reptilians are often mounted with GPS located radio tracking device.
Post by: Achilles on September 28, 2011, 10:48:49 am
Quote from: Mechatrommer on September 28, 2011, 06:43:47 am
Quote from: Time on September 27, 2011, 12:40:28 pm
Where is the antenna in that picture, I don't see it.
maybe a "bigger" and "longer" "unipole antenna" is better for her.
(http://www.skylighters.org/wwiirr/railway1.jpg)


Hehehehhee,you really like the "Dicke Bertha", don't you ;)