...Kevin T. Bilyk; Xuan Zhuang; Katherine R. Murphy; C.-H. Christina Cheng ABSTRACT The evolution of Antarctic notothenioid fishes in the isolated freezing Southern Ocean has led to remarkable trait gains and losses. One of the most extraordinary was the loss of the major oxygen carrier hemoglobin (Hb...

... in the gills of two closely related notothenioid species, one with Hb and RBCs ( Notothenia rossii ) and one without ( Champsocephalus gunnari ). Molecular, biochemical and immunohistochemical markers indicate high levels of a Ca4 isoform in the gills of the icefish (but not the red-blooded N. rossii...

... of the protein degradation machinery in polar species. Both Antarctic ( Trematomus bernacchii , Pagothenia borchgrevinki ) and non-Antarctic ( Notothenia angustata , Bovichtus variegatus ) notothenioids were included in this study to investigate the mechanisms of cold adaptation of this pathway in polar species...

... acidification scenarios and may have the capacity to adjust for future increases in P CO 2  by increasing acid-base compensation through increased ventilation. Antarctica Cardiorespiratory physiology Early life stages Notothenioid Ocean acidification As levels of atmospheric carbon dioxide...

... environmental perturbations brought on by global climate change have the potential to significantly increase the level of oxidative stress and cellular damage in these endemic fish. Previous single stressor studies of the notothenioids have shown they possess the capacity to acclimate to increased temperatures...

...Jody M. Wujcik; George Wang; Joseph T. Eastman; Bruce D. Sidell SUMMARY We quantitatively assessed ocular vascular patterns of six Antarctic notothenioid fishes that vary in their expression of the circulating oxygen-binding protein, hemoglobin (Hb). Digital image analyses revealed marked...

...Bradley A. Buckley; Sean P. Place; Gretchen E. Hofmann SUMMARY The Antarctic fishes, isolated over evolutionary history in the sub-zero waters of the Southern Ocean, are an ideal group for studying the processes of cold adaptation. One species of Antarctic notothenioid fish, Trematomus bernacchii...

... species from stable thermal environments, an Antarctic notothenioid, Trematomus bernacchii (-1.86°C), and a tropical clownfish, Amphiprion percula (26-30°C). For all species, keratocyte speed increased with increasing temperature. G. mirabilis and C. salinus keratocytes reached maximal speeds at 25°C...