Accession Number : ADA267522


Title :   Assessing the Thermal Limit of Bottlenose Dolphins: A Cooperative Study by Trainers, Scientists, and Animals


Corporate Author : NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267522.pdf


Report Date : Jun 1993


Pagination or Media Count : 5


Abstract : Although bottlenose dolphins (Tursiops truncatus) may be exposed to ocean water temperatures ranging from 6 deg C to 27 deg C, little is known regarding their preferred environmental temperatures. Consequently, it is difficult to predict the 'ideal' water temperature for the animals in captivity. To determine the range of thermally neutral water temperatures for these cetaceans, we examined the thermoregulatory physiology of adult bottlenose dolphins (body weight = 136 kg) trained to rest in a water filled box. Metabolic rate, body temperature, skin temperature, and heat flow were measured over a 10 deg C range of water temperatures. The results indicate that the lower critical water temperature (Tlc) for bottlenose dolphins is variable; Tlc, was less than 6 deg C for San Diego dolphins in the winter and 11 - 16 deg C for Hawaiian animals in the summer. Further cooperative research will enable us to anticipate the thermal requirements of both large and small cetaceans in captivity.... Marine biosystems


Descriptors :   *TEMPERATURE CONTROL , *CETACEA , *DOLPHINS(MAMMALS) , *BODY TEMPERATURE , REQUIREMENTS , REPRINTS , LOW TEMPERATURE , NEUTRAL , WATER , RATES , METABOLISM , FLOW , HEAT TRANSMISSION , REST , BODY WEIGHT , SUMMER , ADULTS , OCEAN ENVIRONMENTS , LEARNING , HEAT , OCEANS , BEHAVIOR , BOXES , VARIABLES , SEASONAL VARIATIONS , WINTER , ANIMALS , PHYSIOLOGY


Subject Categories : Biology
      Biological Oceanography


Distribution Statement : APPROVED FOR PUBLIC RELEASE