Produção Nacional
Revisado por pares
Gladius and statolith as tools for age and growth studies of the squid Loligo plei (Teuthida: Loliginidae) off southern Brazil
2006; Instituto de Tecnologia do Paraná (Tecpar); Volume: 49; Issue: 5 Linguagem: Inglês
10.1590/s1516-89132006000600009
ISSN1678-4324
AutoresJosé Ángel Álvarez Pérez, Daniela Cordella de Aguiar, João Antônio Teixeira dos Santos,
Tópico(s)Crustacean biology and ecology
ResumoStatolith and gladius were investigated for their suitability as tools for age and growth studies in the loliginid squid Loligo plei off southern Brazil. Statoliths when polished, revealed a series of concentric increments deposited around a nucleus. Consistent increment counts covered the squid's entire life-time and could be considered suitable for individual age estimation. Growth increments were observed on the dorsal surface as delimited by consecutive marks formed during low growth periods. Because early growth was masked during chitin deposition, total increment counts underestimated individual age. Gladius growth was highly correlated with somatic growth, and gladius increments could be used to reconstruct individual growth histories. Both statolith and gladius increments were deposited with the same, possibly daily, periodicity. It could be inferred that L. plei off southern Brazil might live up to around nine months of age.
Referência(s)