Open Access. Powered by Scholars. Published by Universities.®

Aquaculture and Fisheries Commons™

Open Access. Powered by Scholars. Published by Universities.®

William & Mary

Series

2003

Bulbus arteriosus; P-D loop; r-shaped curve; video dimensional analysis; tuna; Thunnus

Articles 1 - 1 of 1

Full-Text Articles in Aquaculture and Fisheries

Form And Function Of The Bulbus Arteriosus In Yellowfin Tuna (Thunnus Albacares): Dynamic Properties, M. H. Braun, Richard Brill, J. M. Gosline, D. R. Jones Oct 2003

Form And Function Of The Bulbus Arteriosus In Yellowfin Tuna (Thunnus Albacares): Dynamic Properties, M. H. Braun, Richard Brill, J. M. Gosline, D. R. Jones

VIMS Articles

The bulbus arteriosus of the teleost heart possesses a static inflation curve that is r-shaped over the in vivo pressure range. To examine the possible significance of this in living animals, we recorded arterial blood pressure from anaesthetized yellowfin tuna and utilized a video dimensional analyser to simultaneously record changes in bulbar diameter. By plotting the changes in pressure against the changes in diameter, it was possible to create dynamic pressure-diameter (P-D) loops as well as calculate the instantaneous volume changes within the bulbus. The dynamic P-D loops showed the same features exhibited by static inflation. When nearly empty, a …

Go to article