| pubmed-article:17869150 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:17869150 | lifeskim:mentions | umls-concept:C0327775 | lld:lifeskim |
| pubmed-article:17869150 | lifeskim:mentions | umls-concept:C0039003 | lld:lifeskim |
| pubmed-article:17869150 | lifeskim:mentions | umls-concept:C0242184 | lld:lifeskim |
| pubmed-article:17869150 | lifeskim:mentions | umls-concept:C0007165 | lld:lifeskim |
| pubmed-article:17869150 | lifeskim:mentions | umls-concept:C0392747 | lld:lifeskim |
| pubmed-article:17869150 | lifeskim:mentions | umls-concept:C0443172 | lld:lifeskim |
| pubmed-article:17869150 | pubmed:issue | 3 | lld:pubmed |
| pubmed-article:17869150 | pubmed:dateCreated | 2007-10-2 | lld:pubmed |
| pubmed-article:17869150 | pubmed:abstractText | Pacific tarpon (Megalops cyprinoides) use a modified gas bladder as an air-breathing organ (ABO). We examined changes in cardiac output (V(b)) associated with increases in air-breathing that accompany exercise and aquatic hypoxia. Juvenile (0.49 kg) and adult (1.21 kg) tarpon were allowed to recover in a swim flume at 27 degrees C after being instrumented with a Doppler flow probe around the ventral aorta to monitor V(b) and with a fibre-optic oxygen sensor in the ABO to monitor air-breathing frequency. Under normoxic conditions and in both juveniles and adults, routine air-breathing frequency was 0.03 breaths min(-1) and V(b) was about 15 mL min(-1) kg(-1). Normoxic exercise (swimming at about 1.1 body lengths s(-1)) increased air-breathing frequency by 8-fold in both groups (reaching 0.23 breaths min(-1)) and increased V(b) by 3-fold for juveniles and 2-fold for adults. Hypoxic exposure (2 kPa O2) at rest increased air-breathing frequency 19-fold (to around 0.53 breaths min(-1)) in both groups, and while V(b) again increased 3-fold in resting juvenile fish, V(b) was unchanged in resting adult fish. Exercise in hypoxia increased air-breathing frequency 35-fold (to 0.95 breaths min(-1)) in comparison with resting normoxic fish. While juvenile fish increased V(b) nearly 2-fold with exercise in hypoxia, adult fish maintained the same V(b) irrespective of exercise state and became agitated in comparison. These results imply that air-breathing during exercise and hypoxia can benefit oxygen delivery, but to differing degrees in juvenile and adult tarpon. We discuss this difference in the context of myocardial oxygen supply. | lld:pubmed |
| pubmed-article:17869150 | pubmed:language | eng | lld:pubmed |
| pubmed-article:17869150 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:17869150 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:17869150 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:17869150 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:17869150 | pubmed:month | Nov | lld:pubmed |
| pubmed-article:17869150 | pubmed:issn | 1095-6433 | lld:pubmed |
| pubmed-article:17869150 | pubmed:author | pubmed-author:BaldwinJJ | lld:pubmed |
| pubmed-article:17869150 | pubmed:author | pubmed-author:ClarkT DTD | lld:pubmed |
| pubmed-article:17869150 | pubmed:author | pubmed-author:SeymourR SRS | lld:pubmed |
| pubmed-article:17869150 | pubmed:author | pubmed-author:FarrellA PAP | lld:pubmed |
| pubmed-article:17869150 | pubmed:author | pubmed-author:ChristianKK | lld:pubmed |
| pubmed-article:17869150 | pubmed:author | pubmed-author:WellsR M GRM | lld:pubmed |
| pubmed-article:17869150 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:17869150 | pubmed:volume | 148 | lld:pubmed |
| pubmed-article:17869150 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:17869150 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:17869150 | pubmed:pagination | 562-71 | lld:pubmed |
| pubmed-article:17869150 | pubmed:dateRevised | 2008-11-21 | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:meshHeading | pubmed-meshheading:17869150... | lld:pubmed |
| pubmed-article:17869150 | pubmed:year | 2007 | lld:pubmed |
| pubmed-article:17869150 | pubmed:articleTitle | Changes in cardiac output during swimming and aquatic hypoxia in the air-breathing Pacific tarpon. | lld:pubmed |
| pubmed-article:17869150 | pubmed:affiliation | Environmental Biology, School of Earth and Environmental Sciences, University of Adelaide, Adelaide 5005, Australia. timothy.clark.mail@gmail.com | lld:pubmed |
| pubmed-article:17869150 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:17869150 | pubmed:publicationType | Comparative Study | lld:pubmed |
| pubmed-article:17869150 | pubmed:publicationType | Research Support, Non-U.S. Gov't | lld:pubmed |
| http://linkedlifedata.com/r... | pubmed:referesTo | pubmed-article:17869150 | lld:pubmed |
