ABSTRACT
This chapter focuses on the estimation of age of fish from tropical environments and the use of these estimates for the stock assessment of relevant fisheries, many of which are artisanal or small-scale in nature. It takes a broad-based critical perspective, ideal for those interested in a discussion of the principal methods available for estimating age. It is particularly suitable for those who must integrate age determination into a stock assessment, management, pollution or related study. It is a good idea to carry out a comparative study using various bony tissues and ageing methods before deciding on an optimal ageing method. Fin rays and spines of some species of fish have been found to be useful in the determination of age. Vertebrae are collected by cutting through the flesh of the fish; a time- consuming process and impractical if sampling commercial landings. Therefore, only caudal or nearby vertebrae are commonly collected if these bones are necessary for age determination.
