Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/120383
Título: Age and growth of the blue jack mackerel, Trachurus picturatus Bowdich, 1825 (Pisces: Teleostei) off Madeira archipelago
Autores/as: Reis Vasconcelos, Joana Patricia 
Alves, Adriana
Gouveia, Elisabete
Faria, Graça
Clasificación UNESCO: 3105 Peces y fauna silvestre
240109 Crecimiento animal
531201 Agricultura, silvicultura, pesca
Fecha de publicación: 2006
Publicación seriada: Arquipélago. Ciências biológicas e marinhas 
Resumen: Between 1984 and 1986, 630 pairs of sagitta otoliths were collected to determine the age and growth of the blue jack mackerel, Trachurus picturatus from Madeiran waters. The oldest specimen in this study was nine years old and the largest was 46 cm of total length (TL). The parameters of the von Bertalanffy growth curve were estimated for the whole period studied for all fish (L∞=42.32 cm, k=0.161 year-1, t0= -2.563 year; r2=0.743) for males (L∞=39.57 cm, k=0.194 year-1, t0=-2.282 year; r2=0.722) and for females (L∞=49.78 cm, k=0.114 year-1, t0=-3.052 year; r2 = 0.747). There was no significant differences in mean lengths (t–test, p>0,05) and in the von Bertalanffy growth curves (F-test, p>0,05) between sexes. The validity of otolith readings for estimating age and growth was supported by results from backcalculation method. No significant differences were found in the Bertalanffy growth curves between direct reading of otoliths and backcalculation. Growth parameters estimated from backcalculated sizes-at-age were: for both sexes, L∞=48.28 cm, k=0.135 year-1, t0=-2.898 year and r2=0.999; for males, L∞=44.79 cm, k=0.143 year-1, t0=-3.207 year, r2=0.999; and females, L∞=44.63 cm, k=0.163 year-1, t0=-2.430 year, r2=0.999. The relationship between length and weight was calculated for all fish (Wt=0.00764Lt3.05746; r2=0.951), for males (Wt=0.01271Lt2.90807; r2=0.915) and for females (Wt=0.00604Lt3.12613; r2=0.948).
URI: http://hdl.handle.net/10553/120383
ISSN: 0873-4704
Fuente: Arquipélago. Ciências biológicas e marinhas [ISSN 0873-4704], v. 23A, p. 47-57
Colección:Artículos
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