Species which are assumed to be common can begin to decline without anyone paying attention. This is why we monitor.
Introduction: Coastal bottlenose dolphin (Tursiops truncatus) populations in Argentina have declined notably in the past decades, with sightings being extremely rare nowadays in regions where they were once common. Unfortunately, these declines have been ignored continuously resulting in possibly a single resident population remaining in the country.
Read the complete paper by Els Vermeulen and Stefan Brager, linked below.
Mon, 2019-09-02 13:37
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Demographics of the Disappearing Bottlenose Dolphin in Argentina: A Common Species on Its Way Out?