Diving dolphins are master planners
نویسندگان
چکیده
منابع مشابه
Movements and Diving Behavior of Pelagic Spotted Dolphins
We radio tracked 20 pantropical spotted dolphins (Stenella attenuata) in the pelagic waters of the eastern tropical Pacific Ocean during three research cruises in 1992, 1993, and 2001. Dolphins were tracked for up to 6 d from 20 to 1,000 km offshore. Seventeen of these dolphins also carried time–depth recorders, nine of which were recovered with a combined total of 477 h of dive data. The movem...
متن کاملThe diving physiology of bottlenose dolphins (Tursiops truncatus). III. Thermoregulation at depth.
During diving, marine mammals initiate a series of cardiovascular changes that include bradycardia and decreased peripheral circulation. Because heat transfer from thermal windows located in peripheral sites of these mammals depends on blood flow, such adjustments may limit their thermoregulatory capabilities during submergence. Here, we demonstrate how the thermoregulatory responses of bottlen...
متن کاملThe diving physiology of bottlenose dolphins (Tursiops truncatus). II. Biomechanics and changes in buoyancy at depth.
During diving, marine mammals must balance the conservation of limited oxygen reserves with the metabolic costs of swimming exercise. As a result, energetically efficient modes of locomotion provide an advantage during periods of submergence and will presumably increase in importance as the animals perform progressively longer dives. To determine the effect of a limited oxygen supply on locomot...
متن کاملThe dive response redefined: underwater behavior influences cardiac variability in freely diving dolphins.
A hallmark of the dive response, bradycardia, promotes the conservation of onboard oxygen stores and enables marine mammals to submerge for prolonged periods. A paradox exists when marine mammals are foraging underwater because activity should promote an elevation in heart rate (f(H)) to support increased metabolic demands. To assess the effect of the interaction between the diving response and...
متن کاملThe development of blood oxygen stores in bottlenose dolphins (Tursiops truncatus): implications for diving capacity
Enhanced oxygen reserves in the blood facilitate diving in marine mammals. For pinnipeds (seals and sea lions), a developmental period of 4 to 24 months is required for blood oxygen stores to reach adult capacities. We investigated whether a similar developmental period for the blood occurs in cetaceans (dolphins and whales), a group of mammals that are exposed to diving immediately after birth...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 2018
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.177121