THE INSTALLATION

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On February 5th 2008 the Monterey Bay aquarium was forced to release the one Great White shark it had in the aquarium because it was, "getting too frisky" for the aquarium to handle.  Here is a link to see a video of the shark on youtube. Apparently, The Monterey aquarium is the only aquarium in the US that has ever had a history of housing great white sharks due to the temperamental nature of the animals eating habits, and their size. Believe it or not, there are Great White sharks located in the SF bay, specifically off the coast of the Frallon Islands. The Aquarium has plans to capture another Great white temporarily and release it into the SF bay sometime in 2008.




Marine Acoustics is propsed to show at that time. The sound installation located there is meant to spur on further conservation efforts for great white sharks and other marine life off the coast of San Francisco as well as work as an experimentation in sound.




Technological specs:



                                                                                  Pop up and bio acoustic  tags are attached to sharks and other marine animals                        The 3D tradjectory of the animal is transmitte


Data collected over the course of the animals movements generates sound








Data collation and analysis




Bio Acoustic tags are inserted into the animals body cavity to enable their positions to be tracked. The tracking system comprised the tags, a receiver unit, computer hardware and software (Max/MSP, Java, Flash). Over 3 month period, the time in which the exhibit will show, each tag emits a unique signal approximately every minute (the 'ping interval').  The data is collected  and sent from satellites to the receiver unit located at the  Monterey bay aquarium. 


Pop-up archival tags (PAT)

These larger tags are designed to release from an animal at a pre-set time – such as 30, 60, or 90 days after the tag’s attached – and float to the surface. A tag then sends samples of its data to the polar-orbiting Argos satellite for about two weeks, the life of its battery. After the battery dies, the data survives so that if the tag is found, researchers can download the entire data set.

 

This tag is useful for animals that don’t spend a lot of time at the surface, and aren’t caught often.

It collects information about pressure (for depth of dives), ambient light (to estimate location), internal and external body temperature.

We've tagged quite a few white sharks with this tag. White shark researcher Sal Jorgenson of TOPP holds a pop-up tag in the photo above. That tag was attached to this white shark. He attached the tag by inserting a small surgical titanium anchor into the shark. (Do sharks notice when they're being tagged? Some flinch. Others show no reaction, says Sal.) On elephant seals, the tag is glued to the fur. Connecting the tag to the anchor is a thin line that loops around a metal pin at the base of the tag. This metal pin is connected to a battery. A clock in the tag turns the battery on at a preprogrammed time. When the battery turns on, the attachment pin dissolves. The tag floats to the surface and starts transmitting data to one of the Argos satellites. (info found on TOPP website).








   The 3d movements of the animals can be tracked across the pacific ocean