Predation of archival tagged Dolly Varden, Salvelinus malma, reveals predator avoidance behaviour and tracks feeding events by presumed beluga whale, Delphinapterus leucas, in the Beaufort Sea
Abstract Background We report compelling evidence suggesting a predation event of a pop-up satellite archival tagged anadromous Dolly Varden (Salvelinus malma) by a marine mammal during summer in the Beaufort Sea based on abrupt changes in temperature and vertical movements. This observation provide...
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Online Access: | https://doi.org/10.1186/s40317-021-00271-x https://doaj.org/article/6a094eb78b014500a4a2a9d5a00b3462 |
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ftdoajarticles:oai:doaj.org/article:6a094eb78b014500a4a2a9d5a00b3462 2023-05-15T15:40:15+02:00 Predation of archival tagged Dolly Varden, Salvelinus malma, reveals predator avoidance behaviour and tracks feeding events by presumed beluga whale, Delphinapterus leucas, in the Beaufort Sea Colin P. Gallagher Luke Storrie Michael B. Courtney Kimberly L. Howland Ellen V. Lea Shannon MacPhee Lisa Loseto 2021-12-01T00:00:00Z https://doi.org/10.1186/s40317-021-00271-x https://doaj.org/article/6a094eb78b014500a4a2a9d5a00b3462 EN eng BMC https://doi.org/10.1186/s40317-021-00271-x https://doaj.org/toc/2050-3385 doi:10.1186/s40317-021-00271-x 2050-3385 https://doaj.org/article/6a094eb78b014500a4a2a9d5a00b3462 Animal Biotelemetry, Vol 9, Iss 1, Pp 1-17 (2021) Predator–prey interactions Pop-up satellite archival tag Stomach temperature Diving Habitat overlap Ecology QH540-549.5 Animal biochemistry QP501-801 article 2021 ftdoajarticles https://doi.org/10.1186/s40317-021-00271-x 2022-12-31T12:40:20Z Abstract Background We report compelling evidence suggesting a predation event of a pop-up satellite archival tagged anadromous Dolly Varden (Salvelinus malma) by a marine mammal during summer in the Beaufort Sea based on abrupt changes in temperature and vertical movements. This observation provides insight on predator avoidance behaviour by Dolly Varden and the predator’s feeding frequency while the tag was ingested. Based on published distribution and ecology information, we presumed the predator was a beluga whale (Delphinapterus leucas). Supplemental satellite telemetry data from previously tagged Dolly Varden and beluga whales were used to determine the extent of spatial and vertical overlap between species in the area where predation occurred. Results Prior to the predation event, depths and temperatures occupied by the tagged Dolly Varden averaged 1.1 m and 3.1 °C, respectively. On July 7, 2020, depths remained shallow apart from a sudden dive to 12.5 m (16:45 UTC) followed by a precipitous increase in temperature from 4.4 to 27.1 °C (16:52 UTC) suggesting predation by an endotherm. Subsequent readings indicated the endotherm had a resting stomach temperature of 36.1 °C. Including the predation event, eight separate feeding events were inferred during the 20-h period the tag was ingested (before presumed regurgitation) based on subsequent declines in stomach temperatures (mean decline to 31.1 °C) that took an average of 24.1 min to return to resting temperature. The predator occupied mainly shallow depths (mean = 2.3 m), overlapping with tagged belugas that spent 76.9% of their time occupying waters ≤ 2.5 m when frequenting the area occupied by tagged Dolly Varden in the Canadian Beaufort Sea in July. Back-calculation based on tag drift and mean displacement by tagged belugas indicated the predation likely occurred west of the Mackenzie Delta. Conclusion Our findings provide new information on both anti-predator behaviour by, and marine predators of, Dolly Varden in the Beaufort Sea. We provide the first ... Article in Journal/Newspaper Beaufort Sea Beluga Beluga whale Beluga* Delphinapterus leucas Mackenzie Delta Directory of Open Access Journals: DOAJ Articles Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Varden ENVELOPE(7.656,7.656,62.534,62.534) Animal Biotelemetry 9 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Predator–prey interactions Pop-up satellite archival tag Stomach temperature Diving Habitat overlap Ecology QH540-549.5 Animal biochemistry QP501-801 |
spellingShingle |
Predator–prey interactions Pop-up satellite archival tag Stomach temperature Diving Habitat overlap Ecology QH540-549.5 Animal biochemistry QP501-801 Colin P. Gallagher Luke Storrie Michael B. Courtney Kimberly L. Howland Ellen V. Lea Shannon MacPhee Lisa Loseto Predation of archival tagged Dolly Varden, Salvelinus malma, reveals predator avoidance behaviour and tracks feeding events by presumed beluga whale, Delphinapterus leucas, in the Beaufort Sea |
topic_facet |
Predator–prey interactions Pop-up satellite archival tag Stomach temperature Diving Habitat overlap Ecology QH540-549.5 Animal biochemistry QP501-801 |
description |
Abstract Background We report compelling evidence suggesting a predation event of a pop-up satellite archival tagged anadromous Dolly Varden (Salvelinus malma) by a marine mammal during summer in the Beaufort Sea based on abrupt changes in temperature and vertical movements. This observation provides insight on predator avoidance behaviour by Dolly Varden and the predator’s feeding frequency while the tag was ingested. Based on published distribution and ecology information, we presumed the predator was a beluga whale (Delphinapterus leucas). Supplemental satellite telemetry data from previously tagged Dolly Varden and beluga whales were used to determine the extent of spatial and vertical overlap between species in the area where predation occurred. Results Prior to the predation event, depths and temperatures occupied by the tagged Dolly Varden averaged 1.1 m and 3.1 °C, respectively. On July 7, 2020, depths remained shallow apart from a sudden dive to 12.5 m (16:45 UTC) followed by a precipitous increase in temperature from 4.4 to 27.1 °C (16:52 UTC) suggesting predation by an endotherm. Subsequent readings indicated the endotherm had a resting stomach temperature of 36.1 °C. Including the predation event, eight separate feeding events were inferred during the 20-h period the tag was ingested (before presumed regurgitation) based on subsequent declines in stomach temperatures (mean decline to 31.1 °C) that took an average of 24.1 min to return to resting temperature. The predator occupied mainly shallow depths (mean = 2.3 m), overlapping with tagged belugas that spent 76.9% of their time occupying waters ≤ 2.5 m when frequenting the area occupied by tagged Dolly Varden in the Canadian Beaufort Sea in July. Back-calculation based on tag drift and mean displacement by tagged belugas indicated the predation likely occurred west of the Mackenzie Delta. Conclusion Our findings provide new information on both anti-predator behaviour by, and marine predators of, Dolly Varden in the Beaufort Sea. We provide the first ... |
format |
Article in Journal/Newspaper |
author |
Colin P. Gallagher Luke Storrie Michael B. Courtney Kimberly L. Howland Ellen V. Lea Shannon MacPhee Lisa Loseto |
author_facet |
Colin P. Gallagher Luke Storrie Michael B. Courtney Kimberly L. Howland Ellen V. Lea Shannon MacPhee Lisa Loseto |
author_sort |
Colin P. Gallagher |
title |
Predation of archival tagged Dolly Varden, Salvelinus malma, reveals predator avoidance behaviour and tracks feeding events by presumed beluga whale, Delphinapterus leucas, in the Beaufort Sea |
title_short |
Predation of archival tagged Dolly Varden, Salvelinus malma, reveals predator avoidance behaviour and tracks feeding events by presumed beluga whale, Delphinapterus leucas, in the Beaufort Sea |
title_full |
Predation of archival tagged Dolly Varden, Salvelinus malma, reveals predator avoidance behaviour and tracks feeding events by presumed beluga whale, Delphinapterus leucas, in the Beaufort Sea |
title_fullStr |
Predation of archival tagged Dolly Varden, Salvelinus malma, reveals predator avoidance behaviour and tracks feeding events by presumed beluga whale, Delphinapterus leucas, in the Beaufort Sea |
title_full_unstemmed |
Predation of archival tagged Dolly Varden, Salvelinus malma, reveals predator avoidance behaviour and tracks feeding events by presumed beluga whale, Delphinapterus leucas, in the Beaufort Sea |
title_sort |
predation of archival tagged dolly varden, salvelinus malma, reveals predator avoidance behaviour and tracks feeding events by presumed beluga whale, delphinapterus leucas, in the beaufort sea |
publisher |
BMC |
publishDate |
2021 |
url |
https://doi.org/10.1186/s40317-021-00271-x https://doaj.org/article/6a094eb78b014500a4a2a9d5a00b3462 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(7.656,7.656,62.534,62.534) |
geographic |
Mackenzie Delta Varden |
geographic_facet |
Mackenzie Delta Varden |
genre |
Beaufort Sea Beluga Beluga whale Beluga* Delphinapterus leucas Mackenzie Delta |
genre_facet |
Beaufort Sea Beluga Beluga whale Beluga* Delphinapterus leucas Mackenzie Delta |
op_source |
Animal Biotelemetry, Vol 9, Iss 1, Pp 1-17 (2021) |
op_relation |
https://doi.org/10.1186/s40317-021-00271-x https://doaj.org/toc/2050-3385 doi:10.1186/s40317-021-00271-x 2050-3385 https://doaj.org/article/6a094eb78b014500a4a2a9d5a00b3462 |
op_doi |
https://doi.org/10.1186/s40317-021-00271-x |
container_title |
Animal Biotelemetry |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766372414955978752 |