On the formation of the first winter zone in blue whiting otoliths.

Abstract

Otolithes of juvenile blue whiting when recruiting to the industrial fishery in the Norwegian Deep in early autumn (August-October 1970-72) could be divided into two groups, without or with a very insignificant hyaline ring. During the autumn a hyaline ring (a Bowers zone) was laid down followed by new opaque material. A true hyaline winter zone was laid down later in the winter.