Effects Of Diet
The nutritional stress hypothesis considers what happens when sea lions are forced to change diets from fatty, high-energy prey, such as herring, to leaner, lower-energy fish, such as pollock. Such a shift appears to be occurring in parts of the North Pacific and lies at the heart of the nutrition stress hypothesis. Consortium researchers recorded the effects of switching the diets of sea lions on their metabolic and growth rate. Research concluded that sea lions use more energy to digest pollock over herring and squid due to the high proportion of bony material in pollock.