Transdermal cetacean tags are deployed either using a pneumatic air gun or a long fiberglass pole. The tag electronics are cast in epoxy then encased in a stainless steel housing for robustness. Etched rings on the housings provide a visual means to measure the amount of tag migration out of the whale. A “stop plate” at the distal end of the tag limits the depth of the implant. A variety of different stop plate styles are available.
|Model||Tracking||Sensors||Sensor Data Archive||Transmitted Data Products||Life (days)||L x W x H (mm)||Weight (g)|
|Time Series||Dive Behavior||Haulout Behavior||Temperature||Mortality|
|SPOT-177||Argos||Temp||✓||300||114 x 20||185|
|SPOT-193||Argos||Temp||✓||550||172 x 22||200|
|SPOT-303||Argos||Temp, Light||✓||550||300 x 24||390|
|SPLASH10-302||Argos||Depth, Temp, Light||✓||✓||✓||✓||✓||190||300 x 24||390|
Life calculations assume a nominal 250 Argos transmissions per day. It is important to note that when tagging cetaceans, deployment length is typically limited by tag retention rather than battery capacity.