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• W2808220373 abstract "Bottlenose dolphins are highly versatile breath-holding predators that have adapted to a wide range of foraging niches from rivers and coastal ecosystems to deep-water oceanic habitats. Considerable research has been done to understand how dolphins manage O2 during diving, but little information exists on other gases or how pressure affects gas exchange. Here we used a dynamic multi-compartment gas exchange model to estimate blood and tissue O2, CO2 and N2 from high-resolution dive records of two different common bottlenose dolphin (Tursiops truncatus) ecotypes inhabiting shallow (Sarasota Bay) and deep (Bermuda) habitats. The objective was to compare potential physiological strategies used by the two populations to manage shallow and deep diving life styles. We informed the model using species-specific parameters for blood hematocrit, resting metabolic rate, and lung compliance. The model suggests that the known O2 stores were sufficient for Sarasota Bay dolphins to remain within the calculated aerobic dive limit (cADL), but insufficient for Bermuda dolphins that regularly exceeded their cADL. By adjusting the model to reflect the body composition of deep diving Bermuda dolphins, with elevated muscle mass, muscle myoglobin concentration and blood volume, the cADL increased beyond the longest dive duration, thus reflecting the necessary physiological and morphological changes to maintain their deep-diving life-style. The results indicate that cardiac output had to remain elevated during surface intervals for both ecotypes, and suggests that cardiac output has to remain elevated during shallow dives in-between deep dives to allow sufficient restoration of O2 stores for Bermuda dolphins. Our integrated modelling approach contradicts predictions from simple models, emphasising the complex nature of physiological interactions between circulation, lung compression and gas exchange." @default.
• W2808220373 created "2018-06-21" @default.
• W2808220373 creator A5020743541 @default.
• W2808220373 creator A5032016798 @default.
• W2808220373 creator A5051220527 @default.
• W2808220373 creator A5079775001 @default.
• W2808220373 date "2018-07-17" @default.
• W2808220373 modified "2023-10-16" @default.
• W2808220373 title "Modeling Tissue and Blood Gas Kinetics in Coastal and Offshore Common Bottlenose Dolphins, Tursiops truncatus" @default.
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• W2808220373 doi "https://doi.org/10.3389/fphys.2018.00838" @default.
• W2808220373 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6060447" @default.
• W2808220373 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30072907" @default.
• W2808220373 hasPublicationYear "2018" @default.
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