Over the past years, many blue sharks have been tagged with one of two styles of dart
tags. Each tag has a number, a mailing address and a website address to this
Two styles of shark tags used shown above
If you should happen to catch a blue shark with a dart tag on it please
record the following information:
|Position (latitude and longitude)|
|Fork length (measured from the tip of the snout to the fork in the tail)
or Interdorsal length (measured from the inside of the trailing edge of the
first dorsal fin to the start of the second dorsal fin) in cm.|
|sex of the shark (male or female)|
|Depth, temperature and any other relevant information.|
If the shark is alive and well, record the information and leave the tag in
when you release it.
If the shark is dead, please remove a piece of the backbone from above the
gills so that it can be
aged. Wrap the backbone in a sealed bag and freeze.
Send the tag and information (and backbone) to:
Canadian Shark Research Lab
Population Ecology Division
Bedford Institute of Oceanography
P.O. Box 1006
Dartmouth, Nova Scotia
Canada B2Y 4A2
or call 902-426-6382
Be sure to include a return address. We will provide
you with a reward of a ball cap for any tag information returned.
Since the beginning of the tagging program in 2006, more than 1400 blue
sharks have been tagged across all the derbies in Nova Scotia. More than
40 of these sharks have been recaptured to date, including several from
Spanish longliners fishing the North Atlantic. This map shows the tagging
location (circle) and recapture location (end of arrow) for each of these tags.