Modeling Gas Dynamics in Shallow and Deep Diving Cetaceans: Accounting for changes in metabolic rate and blood flow changes
Abstract
A previously published gas kinetics model that estimates blood and tissue N2, O2, and CO2 levels, will be revised to allow changes in activity (acceleration) and blood flow during the dive. The revised model will be used to predict blood and tissue gas tensions using for deep and shallow diving bottlenose dolphins, and Cuviers beaked whales, using collected data for acceleration and depth (Aim 2). In addition, we will assess how updated parameters for deep diving dolphins affect gas dynamics from high resolution long-term dive records from Cuviers beaked whales. Finally, we will compare model estimates of tissue and blood PO2, PCO2, and PN2 from these long-term tags with previously published data based on short-term tag (< 24 hour) records, and investigate how updated parameters, which alters the relationship between ventilation and perfusion, affect the end-dive blood and tissue gas tensions (Aim 2 and 3). We predict that the updated parameter values for the structural properties will significantly reduce end-dive N2 levels while havingminimal impact on O2 and CO2 exchange. This revised model will provide additional evidence for our new hypothesis on how marine mammals can manage gases during repetitive diving and provide suggestions how to mitigate these effects.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 05, 2021
- Source ID
- N000142112652
Entities
People
- Andreas Fahlman
Organizations
- Office of Naval Research
- United States Navy