Breathing frequencies of northern elephant seals at sea and on land revealed by heart rate spectral analysis
Abstract Elephant seals breathe episodically at sea and on land and surprisingly long apnoeas occur in both situations. An important difference is that recovery from apnoeic periods is much quicker at sea, which might be due, in part, to differences in the ventilatory response. Respiratory frequenci...
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2000
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1089.5100 http://mirounga.ucsc.edu/leboeuf/pdfs/Andrews.2000.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1089.5100 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1089.5100 2023-05-15T16:05:35+02:00 Breathing frequencies of northern elephant seals at sea and on land revealed by heart rate spectral analysis Russel D Andrews Daniel P Costa Burney J Le Boeuf David R Jones The Pennsylvania State University CiteSeerX Archives 2000 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1089.5100 http://mirounga.ucsc.edu/leboeuf/pdfs/Andrews.2000.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1089.5100 http://mirounga.ucsc.edu/leboeuf/pdfs/Andrews.2000.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://mirounga.ucsc.edu/leboeuf/pdfs/Andrews.2000.pdf text 2000 ftciteseerx 2020-05-24T00:20:22Z Abstract Elephant seals breathe episodically at sea and on land and surprisingly long apnoeas occur in both situations. An important difference is that recovery from apnoeic periods is much quicker at sea, which might be due, in part, to differences in the ventilatory response. Respiratory frequencies of juvenile northern elephant seals diving at sea and resting on land were estimated from time-frequency maps of the Wigner distribution of heart rate variability. Simultaneous direct measurement of respiration and estimation of respiratory frequency (fR) in the laboratory demonstrated that the error of estimation was small (mean 9 S.D. = 1.0591.23%) and was independent of the magnitude of fR. Eupnoeic fR at sea was 2.4 times higher than on land (22.09 2.0 vs. 9.29 1.3 breaths min − 1 , respectively), facilitating quick recovery from the preceding dive and allowing a 34% increase in time spent apnoeic at sea versus on land. The overall fR (no. of breaths in a eupnoea divided by the total time of the apnoea+ eupnoea cycle) of 2.3 90.6 breaths min − 1 at sea was no different from the rate on land and was inversely related to the preceding dive duration, suggesting that metabolism on longer dives may be reduced. Text Elephant Seals Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Abstract Elephant seals breathe episodically at sea and on land and surprisingly long apnoeas occur in both situations. An important difference is that recovery from apnoeic periods is much quicker at sea, which might be due, in part, to differences in the ventilatory response. Respiratory frequencies of juvenile northern elephant seals diving at sea and resting on land were estimated from time-frequency maps of the Wigner distribution of heart rate variability. Simultaneous direct measurement of respiration and estimation of respiratory frequency (fR) in the laboratory demonstrated that the error of estimation was small (mean 9 S.D. = 1.0591.23%) and was independent of the magnitude of fR. Eupnoeic fR at sea was 2.4 times higher than on land (22.09 2.0 vs. 9.29 1.3 breaths min − 1 , respectively), facilitating quick recovery from the preceding dive and allowing a 34% increase in time spent apnoeic at sea versus on land. The overall fR (no. of breaths in a eupnoea divided by the total time of the apnoea+ eupnoea cycle) of 2.3 90.6 breaths min − 1 at sea was no different from the rate on land and was inversely related to the preceding dive duration, suggesting that metabolism on longer dives may be reduced. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Russel D Andrews Daniel P Costa Burney J Le Boeuf David R Jones |
spellingShingle |
Russel D Andrews Daniel P Costa Burney J Le Boeuf David R Jones Breathing frequencies of northern elephant seals at sea and on land revealed by heart rate spectral analysis |
author_facet |
Russel D Andrews Daniel P Costa Burney J Le Boeuf David R Jones |
author_sort |
Russel D Andrews |
title |
Breathing frequencies of northern elephant seals at sea and on land revealed by heart rate spectral analysis |
title_short |
Breathing frequencies of northern elephant seals at sea and on land revealed by heart rate spectral analysis |
title_full |
Breathing frequencies of northern elephant seals at sea and on land revealed by heart rate spectral analysis |
title_fullStr |
Breathing frequencies of northern elephant seals at sea and on land revealed by heart rate spectral analysis |
title_full_unstemmed |
Breathing frequencies of northern elephant seals at sea and on land revealed by heart rate spectral analysis |
title_sort |
breathing frequencies of northern elephant seals at sea and on land revealed by heart rate spectral analysis |
publishDate |
2000 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1089.5100 http://mirounga.ucsc.edu/leboeuf/pdfs/Andrews.2000.pdf |
genre |
Elephant Seals |
genre_facet |
Elephant Seals |
op_source |
http://mirounga.ucsc.edu/leboeuf/pdfs/Andrews.2000.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1089.5100 http://mirounga.ucsc.edu/leboeuf/pdfs/Andrews.2000.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766401489924784128 |