Two populations of bottlenose dolphins in Fiordland, New Zealand, have been the focus of this study.
The population in Doubtful Sound has previously been shown to be in decline. The other population, those dolphins within Dusky Sound, are located in a more remote and unmodified region of Fiordland.
During a study from 2009-2012, the populations in both Doubtful Sound and Dusky Sound have increased in abundance. The first reported survival estimates for adult dolphins in Dusky Sound shows a very high survival rate. Calf survival in Doubtful Sound has improved, however, it is still the lowest reported for any wild non-provisioned bottlenose dolphin population.
In Dusky Sound, the calf survival rate is the second lowest survival rate for any wild non-provisioned bottlenose dolphin population.
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