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Titolo:
Gas exchange and heart rate in the harbour porpoise, Phocoena phocoena
Autore:
Reed, JZ; Chambers, C; Hunter, CJ; Lockyer, C; Kastelein, R; Fedak, MA; Boutilier, RG;
Indirizzi:
Avanti Commun, St Albans AL3 5BJ, England Avanti Commun St Albans England AL3 5BJ mmun, St Albans AL3 5BJ, England Univ St Andrews, Sch Biol Sci, Sea Mammal Res Unit, St Andrews KY16 9AJ, Fife, Scotland Univ St Andrews St Andrews Fife Scotland KY16 9AJ Y16 9AJ, Fife, Scotland Danish Inst Fisheries Res, DK-2920 Charlottenlund, Denmark Danish Inst Fisheries Res Charlottenlund Denmark DK-2920 enlund, Denmark Harderwijk Marine Mammal Pk, NL-3841 AB Harderwijk, Netherlands HarderwijkMarine Mammal Pk Harderwijk Netherlands NL-3841 AB etherlands Univ Cambridge, Dept Zool, Cambridge CB2 3EJ, England Univ Cambridge Cambridge England CB2 3EJ ool, Cambridge CB2 3EJ, England
Titolo Testata:
JOURNAL OF COMPARATIVE PHYSIOLOGY B-BIOCHEMICAL SYSTEMIC AND ENVIRONMENTALPHYSIOLOGY
fascicolo: 1, volume: 170, anno: 2000,
pagine: 1 - 10
SICI:
0174-1578(200002)170:1<1:GEAHRI>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEALS HALICHOERUS-GRYPUS; METABOLIC RATES; RESPIRATORY ADAPTATIONS; DIVING BEHAVIOR; WEDDELL SEALS; GRAY SEALS; MAMMALS; OXYGEN; BLOOD; EXERCISE;
Keywords:
harbour porpoise; metabolic rate; ventilation; aerobic dive limit; blood oxygen binding;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
56
Recensione:
Indirizzi per estratti:
Indirizzo: Reed, JZ Incyte Genet, 214 Cambridge Sci Pk,Milton Rd, Cambridge CB4 0WA, England Incyte Genet 214 Cambridge Sci Pk,Milton Rd Cambridge England CB4 0WA
Citazione:
J.Z. Reed et al., "Gas exchange and heart rate in the harbour porpoise, Phocoena phocoena", J COMP PH B, 170(1), 2000, pp. 1-10

Abstract

The respiratory physiology, heart rates and metabolic rates of two captivejuvenile male harbour porpoises (both 28 kg) were measured using a rapid-response respiratory gas analysis system in the laboratory. Breath-hold durations in the laboratory (12 +/- 0.3 s, mean +/- SEM) were shorter than field observations. although a few breath-holds of over 40 s were recorded. Themean percentage time spent submerged was 89 +/- 0.4%. Relative to similarly-sized terrestrial mammals, the respiratory frequency was low (4.9 +/- 0.19 breaths min(-1)) but with high tidal volumes (1.1 +/- 0.01 l), enabling acomparatively high minute rate of gas exchange. Oxygen consumption under these experimental conditions (247 +/- 13.8 ml O-2. min(-1)) was 1.9-fold higher than predicted by standard scaling relations. These data together withan estimate of the total oxygen stores predicted an aerobic dive limit of 5.4 min. The peak end-tidal O-2 values were related to the length of the previous breath-hold, demonstrating the increased oxygen uptake from the lungfor the longer dives. Blood oxygen capacity was 23.5 +/- 1.0 ml.100 ml(-1), and the oxygen affinity was high, enabling rapid oxygen loading during ventilation.

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Documento generato il 04/07/20 alle ore 21:21:27