Bradycardial response in Aplysia exposed to air

R. Feinstein, H. Pinsker, Michael C Schmale, B. A. Gooden

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Heart rate was chronically monitored (Figs. 1, 3) in two species of the marine gastropod Aplysia. The warm water A. brasiliana have an average basal heart rate in water of 33 min-1, whereas the cold water A. californica's heart rate is 20.6 min-1. The heart rate in both species shows a strong temperature dependence and the difference in basal heart rate is negligible when measured at the same temperature (Fig. 2). Both species show a consistent bradycardia when exposed to air (Fig. 4):A. brasiliana showed a 43% average decrease in air, whereas A. californica showed only a 16.5% decrease. Removal of the abdominal ganglion produced no significant decrease in heart rate in either species, nor did it reduce the bradycardial response to air exposure in A. californica (Fig. 8). However, it significantly reduced, but did not abolish, the bradycardia in A. brasiliana (Figs. 5, 6, 7). We conclude that the bradycardia has a significant central component in A. brasiliana, but is peripherally mediated in A. californica. The bradycardial response to air exposure may be analogous to the diving response in air breathing vertebrates.

Original languageEnglish
Pages (from-to)311-324
Number of pages14
JournalJournal of Comparative Physiology ■ B
Volume122
Issue number3
DOIs
StatePublished - Jan 1 1977
Externally publishedYes

Fingerprint

Aplysia
heart rate
Heart Rate
Air
air
Bradycardia
air exposure
Water
abdominal ganglia
Diving
Gastropoda
Temperature
water
diving
warm water
cold water
Ganglia
gastropod
breathing
Vertebrates

ASJC Scopus subject areas

  • Physiology (medical)
  • Environmental Science(all)
  • Physiology
  • Animal Science and Zoology

Cite this

Bradycardial response in Aplysia exposed to air. / Feinstein, R.; Pinsker, H.; Schmale, Michael C; Gooden, B. A.

In: Journal of Comparative Physiology ■ B, Vol. 122, No. 3, 01.01.1977, p. 311-324.

Research output: Contribution to journalArticle

Feinstein, R. ; Pinsker, H. ; Schmale, Michael C ; Gooden, B. A. / Bradycardial response in Aplysia exposed to air. In: Journal of Comparative Physiology ■ B. 1977 ; Vol. 122, No. 3. pp. 311-324.
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