Age and growth of bluemouth, Helicolenus dactylopterus (Delaroche, 1809) from the Azores

D Abecasis, AR Costa, JG Pereira, MR Pinho - Fisheries Research, 2006 - Elsevier
D Abecasis, AR Costa, JG Pereira, MR Pinho
Fisheries Research, 2006Elsevier
The age and growth of the Helicolenus dactylopterus (Delaroche, 1809) in the Azorean
waters were studied using whole and sliced otolith readings. Individuals were collected
during demersal surveys carried out around the Azores islands and its most important
fishing banks and also from commercial landings. A total of 1024 individuals were
measured, weighed and their sex was determined. Individuals ranged from 3 to 49cm total
length (TL) and their estimated ages between 0 and 32 years old. The otoliths showed the …
The age and growth of the Helicolenus dactylopterus (Delaroche, 1809) in the Azorean waters were studied using whole and sliced otolith readings. Individuals were collected during demersal surveys carried out around the Azores islands and its most important fishing banks and also from commercial landings. A total of 1024 individuals were measured, weighed and their sex was determined. Individuals ranged from 3 to 49cm total length (TL) and their estimated ages between 0 and 32 years old. The otoliths showed the typical teleost fish pattern with alternated opaque and hyaline rings. Significant differences between sliced and whole otolith readings were found, especially after 7 years old (>25cm TL). Sliced otoliths were found easier to read, regardless of TL or age. Comparisons with other studies for the Azores region and other areas are discussed.
Elsevier
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