CES Updates

A spatial capture–recapture model for group-living species

Publications /

Authors: Robert L. Emmet, Ben C. Augustine, Briana Abrahms, Lindsey N. Rich, Beth GardnerJournal: EcologyDOI: https://doi.org/10.1002/ecy.3576 From the abstract: “Spatial capture–recapture (SCR) has been used to model both individual and group density in group-living species, but modeling either individual-level or group-level detection results in different biases due to common characteristics of group-living species, such as highly cohesive movement or variation in group size […] […]

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Photo credit: NOAA Fisheries

Vessels and their sounds reduce prey capture effort by endangered killer whales

Publications /

From the abstract: “We identified prey capture dives using whale kinematic signatures and found that the probability of capturing prey increased as salmon abundance increased, but decreased as vessel speed increased. When vessels emitted navigational sonar, whales made longer dives to capture prey and descended more slowly when they initiated these dives. Finally, whales descended more quickly when noise levels

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CES Open House: June 7 2021

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The Center for Ecosystem Sentinels invites you to attend an open house in the Boersma Laboratory from 1pm to 3pm on June 7th! Please come see the lab and meet the students. Boersma LabKincaid Annex A0231 pm – 3 pm At 3pm, we will head to Meany Hall for the 3:30pm Awards of Excellence ceremony where Dee will receive the

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Effects of vessel distance and sex on the behavior of endangered killer whales

Publications /

From the abstract: “Our findings, suggesting that female killer whales are at greater risk to close approaches by vessels, highlight the importance of understanding sex-specific responses to disturbance. These findings can inform future management decisions seeking to preserve foraging opportunities and enhance recovery efforts relevant to many cetacean species, including vulnerable and endangered populations.” Authors: Marla M. Holt, Jennifer B.

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