Warm Eyes Provide Superior Vision in Swordfishes

@article{Fritsches2005WarmEP,
  title={Warm Eyes Provide Superior Vision in Swordfishes},
  author={Kerstin A. Fritsches and Richard W Brill and Eric J. Warrant},
  journal={Current Biology},
  year={2005},
  volume={15},
  pages={55-58}
}
Large and powerful ocean predators such as swordfishes, some tunas, and several shark species are unique among fishes in that they are capable of maintaining elevated body temperatures (endothermy) when hunting for prey in deep and cold water . In these animals, warming the central nervous system and the eyes is the one common feature of this energetically costly adaptation . In the swordfish (Xiphias gladius), a highly specialized heating system located in an extraocular muscle specifically… Expand
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References

SHOWING 1-10 OF 25 REFERENCES
Warm brain and eye temperatures in sharks
TLDR
This brain and eye warming system should buffer the central nervous system from the effects of rapid temperature change and warming of the retina may improve the visual sensitivity of these active predators. Expand
Vision in the deep sea
TLDR
It is not only the intensity of light at different depths, but also its distribution in space, which has been a major force in the evolution of deep‐sea vision, is reviewed in support of the following conclusion. Expand
Daily patterns in the activities of swordfish, Xiphias gladius, observed by acoustic telemetry
Horizontal and vertical movements of swordfish were studied using acoustic telemetry. Five swordfish in the Pacific and one in the Atlantic were tagged with transmitters which provided information onExpand
Anatomical and physiological specializations for endothermy
TLDR
Varying the contractile state of the vascular smooth muscle provides a possible mechanism whereby vessel diameter, and thus blood-flow and heat-exchange effectiveness may be adjusted in vivo. Expand
Temperature and the temporal resolving power of fly photoreceptors
TLDR
The temperature sensitivity of photoreceptors must be taken into account when studying the mechanisms, function and ecology of vision, and gives a distinct advantage to insects that thermoregulate. Expand
Structure of the brain and eye heater tissue in marlins, sailfish, and spearfishes
  • B. Block
  • Biology, Medicine
  • Journal of morphology
  • 1986
TLDR
An unusual circulatory supply to the eyes and brain is associated with the presence of the heater tissue in these fishes. Expand
Swimming behaviour and migration of a swordfish recorded by an archival tag
TLDR
What is believed to be the first successful archival tag experiment with swordfish in the world is reported, with a cyclic seasonal migration between the food-rich Oyashio cold current area during summer and the subtropical wintering area during winter. Expand
A brain heater in the swordfish.
TLDR
The brain and eye of swordfish are warmer than the water, and a tissue that heats the brain is associated with one of the eye muscles that protects the central nervous system from rapid cooling during daily vertical excursions. Expand
Regulation of brain and eye temperatures by the bluefin tuna.
TLDR
A counter-current heat-exchange system in the blood supply to the brain and eye allows metabolic heat to accumulate in these organs and raise their temperatures. Expand
Low retinal noise in animals with low body temperature allows high visual sensitivity
TLDR
The performance of dark-adapted toads and frogs is studied and it is shown that the performance limit of visually guided behaviour is also set by thermal isomerizations, as visual sensitivity limited by thermal events should rise when the temperature falls. Expand
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