• physiological
  • The elevated metabolic rates of tunas are supported by a number of distinctive morphological, biochemical and physiological specializations that are unique to the tribe Thunnini . (biologists.org)
  • Our results confirmed those from previous studies showing that bigeye tuna have extensive physiological thermoregulatory abilities probably exerted through changes of blood flow patterns that controlled the efficiency of vascular countercurrent heat exchanges. (biologists.org)
  • and explore further the behavioral and physiological thermoregulatory abilities of bigeye tuna by modeling the events associated with their daily vertical movements. (biologists.org)
  • ambient
  • Our model successfully predicted the recorded visceral cavity temperatures during vertical excursions provided that the rate constants for heat transfer between the ambient water and the red muscle during cooling ( k low ) and those during heating ( k high ) were very dissimilar. (biologists.org)
  • water
  • Our model took into account the transfer of heat between the portions of the myotomes comprising red muscle fibers adjacent to the spinal column and served by vascular counter current heat exchanges (henceforth referred to as `red muscle') and the water, as well as between the red muscle and the temperature sensor of the archival tags in the visceral cavity. (biologists.org)
  • rates
  • Albacore tuna placed in shipboard respirometers shortly after capture have exhibited similarly high metabolic rates ( Graham and Laurs, 1982 ). (biologists.org)
  • High metabolic rates also demand high cardiac outputs, which tunas achieve through high maximal heart rates and high stroke volumes ( Brill and Bushnell, 2001 ). (biologists.org)