Friday, May 15, 2015

[Ichthyology • 2015] Whole-Body Endothermy in A Mesopelagic Fish, the Opah, Lampris guttatus


An opah Lampris guttatus photographed near San Clemente Island off the southern California coast.
photograph: Ralph Pace | natgeo.com


ABSTRACT 
Endothermy (the metabolic production and retention of heat to warm body temperature above ambient) enhances physiological function, and whole-body endothermy generally sets mammals and birds apart from other animals. Here, we describe a whole-body form of endothermy in a fish, the opah (Lampris guttatus), that produces heat through the constant “flapping” of wing-like pectoral fins and minimizes heat loss through a series of counter-current heat exchangers within its gills. Unlike other fish, opah distribute warmed blood throughout the body, including to the heart, enhancing physiological performance and buffering internal organ function while foraging in the cold, nutrient-rich waters below the ocean thermocline.


Nicholas C. Wegner, Owyn E. Snodgrass, Heidi Dewar and John R. Hyde. 2015. Whole-Body Endothermy in A Mesopelagic Fish, the Opah, Lampris guttatus. Science. 348(6236); 786-789 DOI: 10.1126/science.aaa8902


Behold The First Fully Warm-Blooded Fish Known To Science http://io9.com/behold-the-first-fully-warm-blooded-fish-known-to-scien-1704472418
Scientists discover first warm-bodied fish http://t.co/J5Qd1a3dxJ
Rarely Seen Moonfish, Size of Manhole Cover, Caught on Camera http://on.natgeo.com/1Hh8I1N via @NatGeo

1 comment:

  1. I find this so interesting. And the opah is just a beautiful fish.

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