Estimated field metabolic rates and prey requirements of resident killer whales
Killer whales are large animals that often feed in groups and thus have the potential to deplete prey populations. Determining predator energy requirements is essential to assessing whether prey availability is sufficient. This is important because one risk factor facing the endangered Southern Resi...
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ftunivnebraskali:oai:digitalcommons.unl.edu:usdeptcommercepub-1295 2023-11-12T04:20:14+01:00 Estimated field metabolic rates and prey requirements of resident killer whales Noren, Dawn P. 2011-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/usdeptcommercepub/296 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1295/viewcontent/Noren_MMS_2011_Estimated_field_metabolic.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/usdeptcommercepub/296 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1295/viewcontent/Noren_MMS_2011_Estimated_field_metabolic.pdf Publications, Agencies and Staff of the U.S. Department of Commerce energetics Orcinus orca killer whale marine mammal metabolism prey consumption Environmental Sciences text 2011 ftunivnebraskali 2023-10-30T09:45:21Z Killer whales are large animals that often feed in groups and thus have the potential to deplete prey populations. Determining predator energy requirements is essential to assessing whether prey availability is sufficient. This is important because one risk factor facing the endangered Southern Resident killer whale distinct population segment is limited prey availability. Body mass, field metabolic rate (FMR), and daily prey energy requirements (DPERs) were estimated for each individual in the population. FMRs were calculated from body mass, assuming they range from five to six times Kleiber-predicted basal metabolic rates. FMRs of adults were also calculated from resident killer whale activity budgets and the metabolic cost of swimming at speeds associated with daily activities. These two methods yielded similar results. Total FMRs varied by age and sex, which is partly due to the long developmental period and sexual dimorphism in killer whales. FMRs for males (465–4,434 kg) ranged from 35,048 to 228,216 kcal/d while FMRs for females (465–3,338 kg) ranged from 35,048 to 184,444 kcal/d. DPERs were calculated from FMRs assuming a standard digestive efficiency. Corresponding DPERs ranged from 41,376 to 269,458 kcal/d and 41,376 to 217,775 kcal/d, respectively. Text Killer Whale Orca Orcinus orca Killer whale University of Nebraska-Lincoln: DigitalCommons@UNL |
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University of Nebraska-Lincoln: DigitalCommons@UNL |
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ftunivnebraskali |
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energetics Orcinus orca killer whale marine mammal metabolism prey consumption Environmental Sciences |
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energetics Orcinus orca killer whale marine mammal metabolism prey consumption Environmental Sciences Noren, Dawn P. Estimated field metabolic rates and prey requirements of resident killer whales |
topic_facet |
energetics Orcinus orca killer whale marine mammal metabolism prey consumption Environmental Sciences |
description |
Killer whales are large animals that often feed in groups and thus have the potential to deplete prey populations. Determining predator energy requirements is essential to assessing whether prey availability is sufficient. This is important because one risk factor facing the endangered Southern Resident killer whale distinct population segment is limited prey availability. Body mass, field metabolic rate (FMR), and daily prey energy requirements (DPERs) were estimated for each individual in the population. FMRs were calculated from body mass, assuming they range from five to six times Kleiber-predicted basal metabolic rates. FMRs of adults were also calculated from resident killer whale activity budgets and the metabolic cost of swimming at speeds associated with daily activities. These two methods yielded similar results. Total FMRs varied by age and sex, which is partly due to the long developmental period and sexual dimorphism in killer whales. FMRs for males (465–4,434 kg) ranged from 35,048 to 228,216 kcal/d while FMRs for females (465–3,338 kg) ranged from 35,048 to 184,444 kcal/d. DPERs were calculated from FMRs assuming a standard digestive efficiency. Corresponding DPERs ranged from 41,376 to 269,458 kcal/d and 41,376 to 217,775 kcal/d, respectively. |
format |
Text |
author |
Noren, Dawn P. |
author_facet |
Noren, Dawn P. |
author_sort |
Noren, Dawn P. |
title |
Estimated field metabolic rates and prey requirements of resident killer whales |
title_short |
Estimated field metabolic rates and prey requirements of resident killer whales |
title_full |
Estimated field metabolic rates and prey requirements of resident killer whales |
title_fullStr |
Estimated field metabolic rates and prey requirements of resident killer whales |
title_full_unstemmed |
Estimated field metabolic rates and prey requirements of resident killer whales |
title_sort |
estimated field metabolic rates and prey requirements of resident killer whales |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2011 |
url |
https://digitalcommons.unl.edu/usdeptcommercepub/296 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1295/viewcontent/Noren_MMS_2011_Estimated_field_metabolic.pdf |
genre |
Killer Whale Orca Orcinus orca Killer whale |
genre_facet |
Killer Whale Orca Orcinus orca Killer whale |
op_source |
Publications, Agencies and Staff of the U.S. Department of Commerce |
op_relation |
https://digitalcommons.unl.edu/usdeptcommercepub/296 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1295/viewcontent/Noren_MMS_2011_Estimated_field_metabolic.pdf |
_version_ |
1782336297324511232 |