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  • 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)
  • arches
  • The vertebrate ancestor no doubt had more arches, as some of their chordate relatives have more than 50 pairs of gills. (wikipedia.org)
  • Higher vertebrates do not develop gills, the gill arches form during fetal development, and lay the basis of essential structures such as jaws, the thyroid gland, the larynx, the columella (corresponding to the stapes in mammals) and in mammals the malleus and incus. (wikipedia.org)
  • Two separate neural pathways have been identified within the zebrafish gill arches both the motor and sensory nerve fibre pathways. (wikipedia.org)
  • tissues
  • This allows the tuna to elevate the temperatures of the highly-aerobic tissues of the skeletal muscles, eyes and brain, which supports faster swimming speeds and reduced energy expenditure, and which enables them to survive in cooler waters over a wider range of ocean environments than those of other fish. (wikipedia.org)
  • larvae
  • The ontogeny of larval body density and the morphological and histological events during swimbladder development were investigated in two cohorts of yellowtail kingfish Seriola lalandi larvae to understand the relationship between larval morphology and body density. (worldwidescience.org)
  • consist
  • The following outline is provided as an overview of and topical guide to fish: Fish - any member of a paraphyletic group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits. (wikipedia.org)
  • Marine
  • The southern bluefin tuna is an opportunistic feeder, preying on a wide variety of fish, crustaceans, cephalopods, salps, and other marine animals. (wikipedia.org)
  • A primary focus of these studies is to determine how changes in environmental temperature affect the latitudinal and depth distribution patterns of marine organisms. (stanford.edu)
  • cavity
  • In this host, once infected oligochaetes, which serve as the first intermediate host, are ingested, Eustrongylides migrates through the intestine and is frequently encountered within the musculature, free within the body cavity, or encapsulated on the viscera. (biomedcentral.com)
  • organisms
  • Tunas have highly specialized gills, with a surface area 7-9 times larger than that of other aquatic environment organisms. (wikipedia.org)
  • We seek to determine how different environmental factors, notably temperature and the threat of desiccation, affect organisms, and how organisms respond adaptively to these perturbations. (stanford.edu)
  • structures
  • These structures include the type I cells of the carotid body, the neuroepithelial bodies of the lungs as well as some central and peripheral neurons and vascular smooth muscle cells. (wikipedia.org)
  • large
  • Tuna have hearts that are much larger than other fish, they are about 10 times as large, relative to the size of the body. (sea-ex.com)
  • fish
  • Most fish exchange gases using gills on either side of the pharynx (throat). (wikipedia.org)
  • Labyrinth fish (such as gouramis and bettas) have a labyrinth organ above the gills that performs this function. (wikipedia.org)
  • Fish are the gill-bearing aquatic craniate animals that lack limbs with digits. (wikipedia.org)
  • Ram ventilation is said to be obligatory in southern bluefin tunas, because the buccal-opercular pump system used by other teleost fish became incapable of producing a stream of ventilation vigorous enough for their needs. (wikipedia.org)
  • They are: The tuna is a sleek and streamlined fish, adapted for speed. (wikipedia.org)
  • among
  • A Simple Animation Among the radiata, jellyfish and their kin, the main form of swimming is to flex their cup shaped bodies. (wikipedia.org)
  • however
  • However, the immediate source for the word tuna in English is American Spanish (wikipedia.org)
  • We have, however, specifically excluded any general discussion of the advantages conferred by elevated body temperatures as this subject has already received considerable attention (e.g. (biologists.org)
  • function
  • the head and foot are at one end of an elongated body and function as the anterior (front) of the animal. (wikipedia.org)
  • wild
  • We thus provide a framework for analysis that can be applied to archival tag data sets from other tuna species, as well as for future studies of tunas in the wild. (biologists.org)