Sound and movement data from two overlapping populations of killer whales reveal noise effects on foraging behavior

2021 ◽  
Vol 150 (4) ◽  
pp. A250-A250
Author(s):  
Jennifer B. Tennessen ◽  
Marla M. Holt ◽  
Brianna Wright ◽  
M. Bradley M. Hanson ◽  
Candice Emmons ◽  
...  
Keyword(s):  
Foraging Behavior ◽  
Killer Whales ◽  
Noise Effects ◽  
Movement Data

NOISE EFFECTS ON THE CALL AMPLITUDE OF SOUTHERN RESIDENT KILLER WHALES (ORCINUS ORCA)

Bioacoustics ◽  
2008 ◽  
Vol 17 (1-3) ◽  
pp. 164-166 ◽  
Author(s):  
MARLA M. HOLT ◽  
VAL VEIRS ◽  
SCOTT VEIRS
Keyword(s):  
Orcinus Orca ◽  
Killer Whales ◽  
Noise Effects

scholarly journals Vessel traffic disrupts the foraging behavior of southern resident killer whales Orcinus orca

2009 ◽  
Vol 6 ◽  
pp. 211-221 ◽  
Author(s):  
D Lusseau ◽  
DE Bain ◽  
R Williams ◽  
JC Smith
Keyword(s):  
Foraging Behavior ◽  
Orcinus Orca ◽  
Killer Whales

scholarly journals Taking movement data to new depths: Inferring prey availability and patch profitability from seabird foraging behavior

2017 ◽  
Vol 7 (23) ◽  
pp. 10252-10265 ◽  
Author(s):  
Marianna Chimienti ◽  
Thomas Cornulier ◽  
Ellie Owen ◽  
Mark Bolton ◽  
Ian M. Davies ◽  
...  
Keyword(s):  
Foraging Behavior ◽  
Prey Availability ◽  
Movement Data

Passive acoustic monitoring of Southern Resident Killer Whales: Occurrence, residency and movement data in support of conservation

2021 ◽  
Vol 150 (4) ◽  
pp. A251-A251
Author(s):  
Katherine Gavrilchuk ◽  
Rianna Burnham ◽  
Svein Vagle ◽  
Jesslynn Shaw ◽  
Lynn Rannankari ◽  
...  
Keyword(s):  
Acoustic Monitoring ◽  
Killer Whales ◽  
Passive Acoustic Monitoring ◽  
Movement Data ◽  
Passive Acoustic

scholarly journals Hidden Markov models reveal temporal patterns and sex differences in killer whale behavior

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jennifer B. Tennessen ◽  
Marla M. Holt ◽  
Eric J. Ward ◽  
M. Bradley Hanson ◽  
Candice K. Emmons ◽  
...  
Keyword(s):  
Sex Differences ◽  
Foraging Behavior ◽  
Markov Models ◽  
Hidden Markov ◽  
Movement Behavior ◽  
Conservation Strategies ◽  
Markov Modeling ◽  
Killer Whales ◽  
Suction Cup ◽  
Behavioral States

Abstract Behavioral data can be important for effective management of endangered marine predators, but can be challenging to obtain. We utilized suction cup-attached biologging tags equipped with stereo hydrophones, triaxial accelerometers, triaxial magnetometers, pressure and temperature sensors, to characterize the subsurface behavior of an endangered population of killer whales (Orcinus orca). Tags recorded depth, acoustic and movement behavior on fish-eating killer whales in the Salish Sea between 2010–2014. We tested the hypotheses that (a) distinct behavioral states can be characterized by integrating movement and acoustic variables, (b) subsurface foraging occurs in bouts, with distinct periods of searching and capture temporally separated from travel, and (c) the probabilities of transitioning between behavioral states differ by sex. Using Hidden Markov modeling of two acoustic and four movement variables, we identified five temporally distinct behavioral states. Persistence in the same state on a subsequent dive had the greatest likelihood, with the exception of deep prey pursuit, indicating that behavior was clustered in time. Additionally, females spent more time at the surface than males, and engaged in less foraging behavior. These results reveal significant complexity and sex differences in subsurface foraging behavior, and underscore the importance of incorporating behavior into the design of conservation strategies.

Effects of vessels and their sounds on the foraging behavior of endangered killer whales (Orcinus orca)

2020 ◽  
Vol 148 (4) ◽  
pp. 2685-2685
Author(s):  
Marla M. Holt ◽  
Jennifer Tennessen ◽  
M. Bradley M. Hanson ◽  
Candice Emmons ◽  
Deborah Giles ◽  
...  
Keyword(s):  
Foraging Behavior ◽  
Orcinus Orca ◽  
Killer Whales

How acoustics informs understanding of foraging behavior and effects of vessels and noise on killer whales

2019 ◽  
Vol 146 (4) ◽  
pp. 2897-2897
Author(s):  
Marla M. Holt ◽  
Jennifer B. Tennessen ◽  
Brad Hanson ◽  
Candice Emmons ◽  
Deborah Giles ◽  
...  
Keyword(s):  
Foraging Behavior ◽  
Killer Whales

Age Differences in Eye Movements During Reading: Degenerative Problems or Compensatory Strategy?

2019 ◽  
Vol 24 (4) ◽  
pp. 297-311
Author(s):  
José David Moreno ◽  
José A. León ◽  
Lorena A. M. Arnal ◽  
Juan Botella
Keyword(s):  
Eye Movements ◽  
Eye Movement ◽  
Meta Analysis ◽  
Age Groups ◽  
Behavioral Changes ◽  
Aging Effects ◽  
Movement Data ◽  
Sentence Reading ◽  
The Difference ◽  
Eye Movements During Reading

Abstract. We report the results of a meta-analysis of 22 experiments comparing the eye movement data obtained from young ( Mage = 21 years) and old ( Mage = 73 years) readers. The data included six eye movement measures (mean gaze duration, mean fixation duration, total sentence reading time, mean number of fixations, mean number of regressions, and mean length of progressive saccade eye movements). Estimates were obtained of the typified mean difference, d, between the age groups in all six measures. The results showed positive combined effect size estimates in favor of the young adult group (between 0.54 and 3.66 in all measures), although the difference for the mean number of fixations was not significant. Young adults make in a systematic way, shorter gazes, fewer regressions, and shorter saccadic movements during reading than older adults, and they also read faster. The meta-analysis results confirm statistically the most common patterns observed in previous research; therefore, eye movements seem to be a useful tool to measure behavioral changes due to the aging process. Moreover, these results do not allow us to discard either of the two main hypotheses assessed for explaining the observed aging effects, namely neural degenerative problems and the adoption of compensatory strategies.

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