Cook, T.R., Bailleul, F.,  Lescro&euml;l, A., Tremblay, Y., Bost, C.A. (2008). Crossing the border; Depth of neutral buoyancy in free-ranging cormorants: measurement, behavioural and physiological adjustments, ecological consequences. Marine Biology 154:383–391. Mar. Biol., 154, 388–391.