| Summary: | Abstract We present a decision framework to identify when detailed population‐level assessments are required to understand the potential impacts of a disturbance‐inducing activity on a marine mammal population and discuss how the framework can be applied to other taxa. Species at high risk of population‐level effects can be identified using information on the number of individuals that are likely to be disturbed by the activity, total population size, the probability of repeated disturbance, the species' reproductive strategy, and the life stages (e.g., feeding, pregnant, and lactating) of the individuals most likely to be exposed. This hierarchical approach provides those responsible for conducting impact assessments with a time‐efficient, cost‐effective and reproducible workflow that allows them to prioritize their efforts and assign funds to those species with the most pressing conservation needs. A fully worked case study using marine mammals in the vicinity of a naval training activity is supplied.
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