Premium
Ageing live ringed seals ( Phoca hispida ): Which tooth to pull?
Author(s) -
Chambellant Magaly,
Ferguson Steven H.
Publication year - 2009
Publication title -
marine mammal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.723
H-Index - 78
eISSN - 1748-7692
pISSN - 0824-0469
DOI - 10.1111/j.1748-7692.2008.00269.x
Subject(s) - library science , fishery , citation , geography , archaeology , biology , computer science
Ageing animals is a crucial step to life-history analysis, population dynamics, management and contaminant analysis. Teeth cementum Growth Layer Groups (GLGs) have been used to estimate ages of wild carnivores. Because of their large size, canines are the best choice for ageing purposes but are too important to be removed from live animals. Ages estimated from postcanines and incisors have been used for different species, including pinnipeds, with varying success. Due to the high variability in the visibility of GLGs between species, tooth tissues and tooth types, it is essential to test the validity of new methods for each species individually. Introduction Objectives • Determine precision and accuracy of age estimated by first PostCanine (PC1) and second Incisor (I2) relative to age determined using Canine (C)