James S. Ballantyne

TL;DR: The reciprocal expression of Na+/K+-ATPase isoforms α1a and α1b during seawater acclimation suggests they may have different roles in the gills of freshwater and marine fishes; ion uptake in freshwater fish and ion secretion in marine fishes.

TL;DR: The reduced availability of glutamine coupled with the low levels of nonesterified fatty acids in the blood reduces the availability of molecules essential for tumor growth, which may provide marine elasmobranchs with a “systemic” resistance to cancer.

TL;DR: It is suggested that high stocking density has the effect of mobilizing triglyceride sources, promoting gluconeogenesis from glycerol, but has little effect on protein metabolism.

TL;DR: Cortisol was administered to brook charr (Salvelinus fontinalis) in the form of slow-release intraperitoneal implants to investigate the effect of chronic cortisol stimulation (up to 60 days) on various aspects of intermediary metabolism, and to determine whether such cortisol-induced changes were comparable to those seen in chronically fasted charr as mentioned in this paper.

TL;DR: This work proposes that a unique combination of active urea transport and modification of the phospholipid bilayer membrane is responsible for decreasing the gill permeability to urea and facilitating urea retention by the gills of Squalus acanthias.