Studies on the southern elephant seal, Mirounga leonina (L.). II. Canine tooth structure in relation to function and age determination

Abstract

The gross structure of the canine teeth of Mirounga leonina (L.) is discussed in relation to their function as weapons of aggression. Silver nitrate staining of sections of teeth of known age up to 8 years old in each sex reveals bands of columnar dentine deposited during pregnancy, foetal life, lactation, and autumn and winter periods ashore, as well as during moult and gonad activity. A wide range of endocrine stimuli is involved, though experimental proof of this is required, and it is suggested that the winter haul-out is an adaptation to form hard dentine during the early years of immaturity.