scholarly journals Passive acoustic monitoring reveals spatiotemporal segregation of two fish-eating killer whale (Orcinus orca) populations in proposed critical habitat

2020 ◽  
Author(s):  
CK Emmons ◽  
MB Hanson ◽  
MO Lammers
Keyword(s):  
Killer Whale ◽  
Acoustic Monitoring ◽  
Orcinus Orca ◽  
Passive Acoustic Monitoring ◽  
Critical Habitat ◽  
Passive Acoustic

Determining killer whale (Orcinus orca) call variability from passive acoustic monitoring in the Chukchi and Bering Sea, Alaska

2016 ◽  
Vol 140 (4) ◽  
pp. 3415-3416
Author(s):  
Brijonnay C. Madrigal ◽  
Catherine L. Berchok ◽  
Jessica L. Crance ◽  
Alison K. Stimpert
Keyword(s):  
Bering Sea ◽  
Killer Whale ◽  
Acoustic Monitoring ◽  
Orcinus Orca ◽  
Passive Acoustic Monitoring ◽  
Passive Acoustic

scholarly journals Passive acoustic monitoring of killer whales (Orcinus orca) reveals year-round distribution and residency patterns in the Gulf of Alaska

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hannah J. Myers ◽  
Daniel W. Olsen ◽  
Craig O. Matkin ◽  
Lara A. Horstmann ◽  
Brenda Konar
Keyword(s):  
Killer Whale ◽  
Marine Ecosystem ◽  
Distribution Patterns ◽  
Gulf Of Alaska ◽  
Acoustic Monitoring ◽  
Orcinus Orca ◽  
Killer Whales ◽  
Passive Acoustic Monitoring ◽  
The North ◽  
Passive Acoustic

AbstractKiller whales (Orcinus orca) are top predators throughout the world’s oceans. In the North Pacific, the species is divided into three ecotypes—resident (fish-eating), transient (mammal-eating), and offshore (largely shark-eating)—that are genetically and acoustically distinct and have unique roles in the marine ecosystem. In this study, we examined the year-round distribution of killer whales in the northern Gulf of Alaska from 2016 to 2020 using passive acoustic monitoring. We further described the daily acoustic residency patterns of three killer whale populations (southern Alaska residents, Gulf of Alaska transients, and AT1 transients) for one year of these data. Highest year-round acoustic presence occurred in Montague Strait, with strong seasonal patterns in Hinchinbrook Entrance and Resurrection Bay. Daily acoustic residency times for the southern Alaska residents paralleled seasonal distribution patterns. The majority of Gulf of Alaska transient detections occurred in Hinchinbrook Entrance in spring. The depleted AT1 transient killer whale population was most often identified in Montague Strait. Passive acoustic monitoring revealed that both resident and transient killer whales used these areas much more extensively than previously known and provided novel insights into high use locations and times for each population. These results may be driven by seasonal foraging opportunities and social factors and have management implications for this species.

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