Abstract (EN):
The general objective of this guide is to provide a practical manual for interpreting scales and the estimation of age of Alosa from the East Atlantic and West-Mediterranean (Allis shad, Atlantic and mediterranean shad). Following a brief presentation of the species, populations and rivers studied, the scales, sampling methods and their preparation for reading are described in detail, Definitions and a standard system of notating age are given. The majority of the difficulties encountered in the interpretation of scales are analysed, solutions proposed and some recommendations given. The whole guide is largely illustrative using examples of typical and atypical scales from the various taxons of the different populations studied.
Language:
English
Type (Professor's evaluation):
Scientific
No. of pages:
36