FOOD TRANSIT RATES IN CAPE GANNETS AND JACKASS PENGUINS

Food transit rates in the JackassP enguin (Spheniscusd emersus), a piscivorous seabird, are slower (Duffy et al. 1985) than rates of birds with other diets (Warner 1981). However, digestive performance by the Jackass Penguin may not be typical of fish-eating seabirds. Food transit rates through the digestive tracts of volant seabirds might be faster than those of flightless species, since meals would represent a considerable addition to the body mass that would have to be lifted during flight

RUDIGER C. LAUGKSCH AND DAVID CAMERON DUFFY, TheCondor 88:117-119