Modeling Tissue and Blood Gas Kinetics in Coastal and Offshore Common Bottlenose Dolphins, Tursiops truncatus.

摘要: Bottlenose dolphins are highly versatile breath-holding predators that have adapted to a wide range of foraging niches from rivers and coastal ecosystems deep-water oceanic habitats. Considerable research has been done understand how manage O2 during diving, but little information exists on other gases or pressure affects gas exchange. Here we used dynamic multi-compartment exchange model estimate blood tissue O2, CO2 N2 high-resolution dive records two different common bottlenose dolphin (Tursiops truncatus) ecotypes inhabiting shallow (Sarasota Bay) deep (Bermuda) The objective was compare potential physiological strategies by the populations diving life styles. We informed using species-specific parameters for hematocrit, resting metabolic rate, lung compliance. suggests known stores were sufficient Sarasota Bay remain within calculated aerobic limit (cADL), insufficient Bermuda regularly exceeded their cADL. By adjusting reflect body composition dolphins, with elevated muscle mass, myoglobin concentration volume, cADL increased beyond longest duration, thus reflecting necessary morphological changes maintain deep-diving life-style. results indicate cardiac output had surface intervals both ecotypes, dives in-between allow restoration dolphins. Our integrated modelling approach contradicts predictions simple models, emphasising complex nature interactions between circulation, compression