Endothermy in fishes: a phylogenetic analysis of constraints, predispositions, and selection pressures

@article{Block2004EndothermyIF,
  title={Endothermy in fishes: a phylogenetic analysis of constraints, predispositions, and selection pressures},
  author={Barbara A. Block and John R. Finnerty},
  journal={Environmental Biology of Fishes},
  year={2004},
  volume={40},
  pages={283-302}
}
  • B. Block, J. Finnerty
  • Published 1 July 1994
  • Biology, Environmental Science
  • Environmental Biology of Fishes
SynopsisEndothermy, the ability to raise body temperature by internal heat production, is unusual in teleost fishes and has only been documented within one suborder, the Scombroidei. Two separate modes of endothermy have evolved in the scombroidei; tunas warm their muscles, brain and viscera using heat exchangers in the circulation to these metabolically active tissues while billfishes and one primitive mackerel have a thermogenic organ situated beneath the brain. Both modes of endothermy… 
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    Philosophical Transactions of the Royal Society B
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References

SHOWING 1-10 OF 61 REFERENCES
Activities of key metabolic enzymes in the heater organs of scombroid fishes.
TLDR
Results indicate that heat production could be fueled aerobically by either lipid or carbohydrate metabolism, and that fishes from the colder Mediterranean waters had a higher aerobic capacity and, hence, a greater heat-generating potential, than fish from the warmer waters of the Pacific.
Rates of mitochondrial DNA evolution in sharks are slow compared with mammals
TLDR
Examination of mtDNA sequence variation for 13 species of sharks from two orders that are well represented in the fossil record to test the constancy hypothesis finds differences in mtDNA substitution rates among taxa indicate that it is inappropriate to use a calibration for one group to estimate divergence times or demographic parameters for another group.
Distribution and relative proportions of red muscle in scombrid fishes: consequences of body size and relationships to locomotion and endothermy
The scaling of red muscle with body weight and the distribution of red muscle within the body were compared in seven scombrid fish species to determine relationships between red muscle function and
Oxidative metabolism in thermogenic tissues of the swordfish and mako shark
TLDR
It does not appear that mako shark red muscle mitochondria are specialized for thermogenesis, and it is proposed that calcium released from the sarcoplasmic reticulum may act as the signal coupling enhanced rates of substrate oxidation with calcium transport.
Physiological and behavioural thermoregulation in bigeye tuna (Thunnus obesus)
TLDR
This work shows using telemetered data that free-ranging bigeye tuna (Thunnus obesus) can rapidly alter whole-body thermal conductivity by two orders of magnitude, and combines physiological and behavioural thermoregulation to expand the foraging space of big eye tuna into otherwise prohibitively cold, deep water.
Warm-Bodied Fish
TLDR
Telemetry experiments show that the bluefin tuna can maintain a constant deep body temperature during marked changes in the temperature of its environment, suggesting the selective advantages of greater speed made possible by the warm muscle were important in the evolution of this system.
Biochemical Correlations of Power Development and Metabolic Fuel Preferenda in Fish Hearts
TLDR
Hearts from 16 species of fishes, including representatives of cyclostomes, elasmobranchs, and teleosts, were examined and ATP yields calculated from HK and CPT and corrected to reflect physiological conditions of the tissue suggest that catabolism of either carbohydrate or fatty acid fuels can meet maximal energetic demands of the tissues.
The role of nervous systems in temperature adaptation of poikilotherms.
TLDR
Many poikilothermic animals compensate for body cooling or heating by changing their metabo­ lism in such a way as to permit relatively constant activity over a wide range of body temperatures.
The horizontal septum: Mechanisms of force transfer in locomotion of scombrid fishes (Scombridae, Perciformes)
TLDR
It is concluded that the collagen fibers of myosepta, horizontal septa, and skin are the organs that transfer locomotor forces from the contraction of myomeres to the backbone and caudal fin during locomotion, and that locomotor muscle pulls against a three‐dimensional structure of tendons, septa and skin that is kept in tension by the radial expansion of the contracting muscle.
Enzymes of energy metabolism and gluconeogenesis in the Pacific blue marlin, Makaira nigricans
TLDR
Levels of gluconeogenic enzymes in liver and kidney as well as enzymes possibly involved in glycogenogenesis in white muscle suggest that the major substrate for glycogenesis in this tissue is endogenous lactate and that themajor route for conversion of pyruvate to phosp...
...
...