MOLECULAR PHYLOGENYOF HEMOGLOBIN*□S

The Arctic and Antarctic marine faunas differ by age and isolation. Fishes of the two polar regions have undergone dif-ferent regional histories that have driven the physiological diversities. Antarctic fish are highly stenothermal, in keeping with stable water temperatures, whereas Arctic fish, bei...

Full description

Bibliographic Details
Main Authors: Boreal Fish, Family Gadidae
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Antarctic
Arctic
Antarc*
Arctic cod
Arctogadus glacialis
atlantic cod
Boreogadus saida
Gadus morhua
polar cod
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.293
http://glecointre.mnhn.fr/docs/065_Verde_et_al2006aJBC.pdf
Description
Summary:The Arctic and Antarctic marine faunas differ by age and isolation. Fishes of the two polar regions have undergone dif-ferent regional histories that have driven the physiological diversities. Antarctic fish are highly stenothermal, in keeping with stable water temperatures, whereas Arctic fish, being exposed to seasonal temperature variations, exhibit higher physiological plasticity. This study reports the characteriza-tion of the oxygen transport systemof threeArctic species of the family Gadidae, namely the Arctic cod Arctogadus glacialis, the polar cod Boreogadus saida, and the Atlantic cod Gadus morhua. Unlike Antarctic notothenioids, the blood displays high multiplicity, i.e. it has three hemoglobins, similar to many other acanthomorph teleosts. In the most abundant hemoglo-bin, oxygen binding ismodulated by heterotropic effectors, with marked Bohr and Root effects. Remarkably, in two species

Similar Items