Data from: Empirically testing the influence of light regime on diel activity patterns in a marine predator reveals complex interacting factors shaping behaviour
Diel cycles in marine predator diving behaviour centre around the light-mediated diel vertical migration (DVM) of prey, and are considered critical for optimizing foraging and limiting competition across global seascapes. Yet our understanding of predator diel behaviour is based primarily on examini...
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ftzenodo:oai:zenodo.org:7055225 2023-05-15T15:01:56+02:00 Data from: Empirically testing the influence of light regime on diel activity patterns in a marine predator reveals complex interacting factors shaping behaviour Storrie, Luke Hussey, Nigel MacPhee, Shannon O'Corry-Crowe, Greg Iacozza, John Barber, David Loseto, Lisa 2022-08-31 https://zenodo.org/record/7055225 https://doi.org/10.5061/dryad.fttdz08wk unknown https://zenodo.org/communities/dryad https://zenodo.org/record/7055225 https://doi.org/10.5061/dryad.fttdz08wk oai:zenodo.org:7055225 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Arctic diel vertical migration diurnal natural experiment nocturnal whale predator biotelemetry info:eu-repo/semantics/other dataset 2022 ftzenodo https://doi.org/10.5061/dryad.fttdz08wk 2023-03-11T00:47:06Z Diel cycles in marine predator diving behaviour centre around the light-mediated diel vertical migration (DVM) of prey, and are considered critical for optimizing foraging and limiting competition across global seascapes. Yet our understanding of predator diel behaviour is based primarily on examining relative depth usage between constant day/night cycles with no formal investigation of how varying light regimes interact with abiotic factors to shape diel activity. The extreme seasonal light regimes (midnight sun, polar night, day/night cycle) in the Arctic provide a unique natural experimental setting to empirically investigate the occurrence and intensity of diel behaviour in marine predators relative to changing light levels while concomitantly assessing interacting abiotic factors. Depth time series data from satellite-linked tags deployed on six belugas for up to 12 months were used to quantify diel behaviour by calculating dissimilarity in time-at-depth between periods of low and high solar altitude on each day. Generalized additive mixed effects models were used to examine the influence of hours of daylight across extreme light cycles, coupled with bathymetry and sea ice concentration; focal diel patterns were further examined relative to the thermal structure of the water column. As predicted, belugas exhibited cathemerality during the midnight sun, and initiated diel behaviour with the onset of the fall day/night cycle, with a marked increase in its intensity with the progression to equal day/night length. Occurrence of diel patterns, however, was complex; ceasing in regions with seafloor depths < 700 m, and occurring with greatest intensity when the water column was thermally homogeneous within the upper 150 m. Through empirical investigation, this study demonstrates that the onset of day/night light cycles and presumably associated prey DVM can modulate predator diel dive behaviour under certain circumstances, but highlights how the complex interaction of abiotic factors with light regime shape ... Dataset Arctic Beluga* polar night Sea ice midnight sun Zenodo Arctic |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Arctic diel vertical migration diurnal natural experiment nocturnal whale predator biotelemetry |
spellingShingle |
Arctic diel vertical migration diurnal natural experiment nocturnal whale predator biotelemetry Storrie, Luke Hussey, Nigel MacPhee, Shannon O'Corry-Crowe, Greg Iacozza, John Barber, David Loseto, Lisa Data from: Empirically testing the influence of light regime on diel activity patterns in a marine predator reveals complex interacting factors shaping behaviour |
topic_facet |
Arctic diel vertical migration diurnal natural experiment nocturnal whale predator biotelemetry |
description |
Diel cycles in marine predator diving behaviour centre around the light-mediated diel vertical migration (DVM) of prey, and are considered critical for optimizing foraging and limiting competition across global seascapes. Yet our understanding of predator diel behaviour is based primarily on examining relative depth usage between constant day/night cycles with no formal investigation of how varying light regimes interact with abiotic factors to shape diel activity. The extreme seasonal light regimes (midnight sun, polar night, day/night cycle) in the Arctic provide a unique natural experimental setting to empirically investigate the occurrence and intensity of diel behaviour in marine predators relative to changing light levels while concomitantly assessing interacting abiotic factors. Depth time series data from satellite-linked tags deployed on six belugas for up to 12 months were used to quantify diel behaviour by calculating dissimilarity in time-at-depth between periods of low and high solar altitude on each day. Generalized additive mixed effects models were used to examine the influence of hours of daylight across extreme light cycles, coupled with bathymetry and sea ice concentration; focal diel patterns were further examined relative to the thermal structure of the water column. As predicted, belugas exhibited cathemerality during the midnight sun, and initiated diel behaviour with the onset of the fall day/night cycle, with a marked increase in its intensity with the progression to equal day/night length. Occurrence of diel patterns, however, was complex; ceasing in regions with seafloor depths < 700 m, and occurring with greatest intensity when the water column was thermally homogeneous within the upper 150 m. Through empirical investigation, this study demonstrates that the onset of day/night light cycles and presumably associated prey DVM can modulate predator diel dive behaviour under certain circumstances, but highlights how the complex interaction of abiotic factors with light regime shape ... |
format |
Dataset |
author |
Storrie, Luke Hussey, Nigel MacPhee, Shannon O'Corry-Crowe, Greg Iacozza, John Barber, David Loseto, Lisa |
author_facet |
Storrie, Luke Hussey, Nigel MacPhee, Shannon O'Corry-Crowe, Greg Iacozza, John Barber, David Loseto, Lisa |
author_sort |
Storrie, Luke |
title |
Data from: Empirically testing the influence of light regime on diel activity patterns in a marine predator reveals complex interacting factors shaping behaviour |
title_short |
Data from: Empirically testing the influence of light regime on diel activity patterns in a marine predator reveals complex interacting factors shaping behaviour |
title_full |
Data from: Empirically testing the influence of light regime on diel activity patterns in a marine predator reveals complex interacting factors shaping behaviour |
title_fullStr |
Data from: Empirically testing the influence of light regime on diel activity patterns in a marine predator reveals complex interacting factors shaping behaviour |
title_full_unstemmed |
Data from: Empirically testing the influence of light regime on diel activity patterns in a marine predator reveals complex interacting factors shaping behaviour |
title_sort |
data from: empirically testing the influence of light regime on diel activity patterns in a marine predator reveals complex interacting factors shaping behaviour |
publishDate |
2022 |
url |
https://zenodo.org/record/7055225 https://doi.org/10.5061/dryad.fttdz08wk |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beluga* polar night Sea ice midnight sun |
genre_facet |
Arctic Beluga* polar night Sea ice midnight sun |
op_relation |
https://zenodo.org/communities/dryad https://zenodo.org/record/7055225 https://doi.org/10.5061/dryad.fttdz08wk oai:zenodo.org:7055225 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.fttdz08wk |
_version_ |
1766333942119530496 |