'^iftll. 



4 



Appendix Figure A4. — A button tag placed on the dorsal fin of a newly captured saddleback dolphin off Catalina Island, Calif. 



{Photo by W. E. Evans.) 



iummmt ■■ 



Appendix Figure A5.— This is the way the botton tag appears on an 

 animal swimming free in the open sea off Palos Verdes, Calif. (Photo by 

 B. Noble, courteiy of Marineland of the Pacific. ) 



brands and the use of gas branding devices. Neither 

 itechnique, however, has yet reached the field biolog^ist. 



The success of any tagging program using static tags 

 depends on the resighting of tagged animals and the recovery 

 of tags. For that reason, we appeal to readers to be on the 



Appendix Figure A6. — Freeze-branding is an apparently painless 

 method of applying a permanent identifying mark to the body of a 

 porpoise or whale. (PAoto of a bottlenoied dolphin offSaraiota, Flo., by 

 A. B. Irvine.) 



lookout for tagged animals and to report sightings to one of 

 the authors. 



Radio Transmitter Tags 



In recent years, radio transmitter tags have been 

 developed for use on marine mammals. As they continue to 

 become more reliable, these tags are expected to come into 

 more and more widespread use. 



Early radio tags (Fig. A7) were simple locator beacons 

 which permitted the animal to be tracked by sending a signal 

 to a tracking vessel or aircraft every time the animal surfaced 

 and the antenna tip was exposed. Even these basic package.^ 



156 



