Details

Autor(en) / Beteiligte

• Boynton, Angela Kristine

Titel

The development of ventilatory mechanics and air-breathing patterns in the tiger salamander, Ambystoma tigrinum

Ort / Verlag

ProQuest Dissertations & Theses

Erscheinungsjahr

1994

Quelle

ProQuest Dissertations & Theses A&I

Beschreibungen/Notizen

• The ventilatory mechanics and reflex responses to hypoxia and hypercapnia were described for larval and adult tiger salamanders, Ambystoma tigrinum. While the overall ventilatory mechanics were similar in both groups. Buccal expansion was faster in larvae than in adults, and glottal opening occurred later and for a shorter duration in larvae, resulting in little air turnover in the lung of larvae compared to adults. Larvae took single breaths, while adults often took 2 or 3 consecutive breaths. Early stage larvae did not typically air breathe in normoxic water, and responded to aquatic hypoxia by taking single air breaths. As larvae developed they began to breathe more frequently in normoxic water, and increased breathing in response to aerial hypoxia. Adults air breathed regularly in normoxic water, sometimes breathing in bouts of 2 or 3 breaths, and responded to aerial hypoxia and aquatic hypercapnia.