[MARMAM] New publication: Cetacean acoustic occurrence on the US Atlantic Outer Continental Shelf from 2017 to 2020

Katie Kowarski katiekowarski at gmail.com
Thu Aug 11 11:29:35 PDT 2022

We are pleased to announce our recent publication available online!

Kowarski, K.A., S.B. Martin, E.E. Maxner, C.B. Lawrence, J.J.-Y. Delarue,
and J.L. Miksis-Olds. 2022. Cetacean acoustic occurrence on the US Atlantic
Outer Continental Shelf from 2017 to 2020. *Marine Mammal Science*.


Long-term distribution data for cetaceans are lacking, inhibiting the
ability of management bodies to assess trends and react appropriately. Such
is true even along the US Atlantic Outer Continental Shelf (OCS) where
previous passive acoustic monitoring programs have laid the groundwork for
monitoring cetacean occurrence over a multidecadal scale. Here, we continue
and expand the scope of previous acoustic programs, providing a synopsis of
the monthly cetacean acoustic occurrence from late 2017 to late 2020.
Acoustic data were collected using bottom-mounted autonomous recorders
located at seven stations along the OCS in depths of 212–900 m. Automated
cetacean vocalization detector-classifiers were applied, and the resulting
automated detections directed the manual review of a subset of the data by
analysts. Only manual detections informed the occurrence results. Six
baleen whale species and at least eight toothed whale species occurred in
the region with diversity increasing in winter. In considering previous
monitoring program results, we found evidence that some mysticete whales
are spending less time in the region annually, confirmed that some species
occur farther offshore than previously reported, and identified two
previously unreported areas utilized by beaked whales. For effective
species management, these findings must be considered, and monitoring
programs continued.
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