Scientific Papers

Abstract: Dental abrasion is apparent across different sexes and age groups within pinniped species, specifically California sea lions (Zalophus californianus),  underscoring the need for comprehensive investigations into the underlying factors and potential implications for their oral health and overall well-being. For examination, 93.5% of teeth were accessible. Artificial absence accounted for 5.3%, 0.9% were classified as missing due to acquired tooth loss, and 0.2% were congenitally absent. A total of 157 skulls (36.7%) recorded abrasion, differing from previous research that recorded 65.5% dental abrasion. Abrasion varied among age groups and between sexes. Although males experienced a higher rate of abrasion (31.6%) than females (5.1%), there was not a significant difference (P=0.1335). The frequency of dental wear heightened with advancing age; however, the difference is not statistically significant (P=0.990). Discrepancies in abrasion rates may stem from variations in dietary habits or aggressive behaviors. Our sample heavily accounted for male and immature specimens, affecting our findings and ultimately countering the previous research that has been conducted.