Ring formation on otoliths and scales of Pagrus pagrus: A comparative study

TitleRing formation on otoliths and scales of Pagrus pagrus: A comparative study
Publication TypeJournal Article
Year of Publication1998
AuthorsMachias, A, Tsimenides N, Kokokiris L, Divanach P
JournalJournal of Fish Biology
Volume52
Issue2
Pages350 - 361
Keywordsgrowth, Otolith rings, Pagrus pagrus, Scales rings, Validation
Abstract

One annulus formed on the scales of farmed red porgy Pagrus pagrus each year during March and one opaque zone on the otoliths during June. Scales proved to be more sensitive than otoliths in recording the life history of the red porgy. A false annulus (ring of capture) was observed on the scales of the 0+ age group, but not on the otoliths. A gradual lengthening of the period of annulus formation was observed, from the younger to the older fish. The annulus formation in fish older than 2+ was less synchronized, due to the aquaculture conditions. Scales were more accurate than otoliths in annuli formation. A high percentage of missing or additional opaque zones were observed on otoliths of older fish. These irregularities were related to fish maturation and/or farming conditions. Farmed fish grew three times as fast as the wild fish.

URLhttp://www.scopus.com/inward/record.url?eid=2-s2.0-0031891494&partnerID=40&md5=87566c6d1571076dbe0eb747e98a83cd

User login