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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104 Citations
Highly Influential Citations
11
Background Citations
53
Methods Citations
2
Results Citations
1

104 Citations

Evolution and Consequences of Endothermy in Fishes
TLDR
Comparisons of tunas and their ectothermic sister species (mackerels and bonitos) provide no direct support of the hypothesis that endothermy results in increased aerobic swimming speeds, slow‐oxidative muscle power, or energetic efficiency.
Phylotranscriptomic Insights into the Diversification of Endothermic Thunnus Tunas
TLDR
It is found that parallel selection on standing genetic variation is associated with the evolution of endothermy in bluefin tunas, and phylogenetic techniques illustrate that the eight Thunnus species are genetically distinct, but found evidence of mitochondrial genome introgression across two species.
The Genomes of Two Billfishes Provide Insights into the Evolution of Endothermy in Teleosts
TLDR
The billfish-specific genetic innovations were found to be associated with heat exchange, thermoregulation, and the specialized morphology, including elongated bill, enlarged dorsal fin in sailfish and loss of the pelvic fin in swordfish.
Evolution of mitochondrial-encoded cytochrome oxidase subunits in endothermic fish: the importance of taxon-sampling in codon-based models.
The evolution of mechanisms involved in vertebrate endothermy
  • L. LegendreD. Davesne
  • Biology, Environmental Science
    Philosophical Transactions of the Royal Society B
  • 2020
TLDR
It is shown that endothermy in mammals and birds is not as well defined as commonly assumed by evolutionary biologists and consists of a vast array of physiological strategies, many of which are currently unknown.
Evidence for cranial endothermy in the opah (Lampris guttatus)
TLDR
The hypothesis that the opah can maintain elevated cranial temperatures is supported and the proximal region of the paired lateral rectus extraocular muscle appears to be the primary source of heat.
Evolutionary pathways toward gigantism in sharks and rays
TLDR
It is found that filter feeders and mesotherms deviate from general relationships between trophic level and body size, and exhibit significantly larger sizes than ectothermic‐macropredators.
Molecular Evolution of Cytochrome c Oxidase in High-Performance Fish (Teleostei: Scombroidei)
TLDR
Focusing on a catalytic subunit of cytochrome c oxidase (COX II), it is found that the rate ratio of nonsynonymous (dN; amino acid changing)-to-synonymous (DS; silent) substitutions was not increased in lineages leading to the tuna but was significantly increased in the lineage preceding the billfish.
Whole‐body endothermy: ancient, homologous and widespread among the ancestors of mammals, birds and crocodylians
TLDR
There is strong evidence for whole‐body endothermy being ancient and widespread among amniotes and that the similarity of biochemical processes driving muscle NST in extant birds and mammals strengthens the case for its plesiomorphy.
Reduced and reversed temperature dependence of blood oxygenation in an ectothermic scombrid fish: implications for the evolution of regional heterothermy?
TLDR
Examination of oxygenation of whole blood of the chub mackerel (Scomber japonicus) at 10, 20 and 30°C and at 0.5, 1 and 2% CO2 provides clear evidence of independent and reversed open-system temperature effects on blood oxygenation in S.japonicus.
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