Forty-seven biopsy attempts were made on northern bottlenose whales in 1996 and 1997 (Table 1).
The response rate of northern bottlenose whales to biopsy hits (89%) was greater than that found for baleen whales (right whales, Eubalaena glacialis, 19%; Brown et al.
Reactions of northern bottlenose whales to suction-cup tag deployment were also low-level.
The major cue to which bottlenose whales react appears to be the physical impact of the tag or biopsy, because reaction to hits was much greater than reaction to misses (Table 1).
The primary factor affecting the reaction of bottlenose whales to either tag or biopsy stimulus appears to be the behavior of the whale at the time of the stimulus.
Reliability of photographic and molecular techniques for sexing northern bottlenose whales (Hyperoodon ampullatus).