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Please use this identifier to cite or link to this item: http://hdl.handle.net/1834/3226

Title: Estudios sobre la edad y crecimiento de la Palma Calamus brachysomus (Lockington) (Pisces: Sparidae) en aguas ecuatorianas
Other Titles: Studies on the age and growth of the Palm Calamus brachysomus (Lockington) (Pisces: Sparidae) in Ecuadorian waters
Authors: Martínez, J.
ASFA Terms: Demersal fisheries
Growth curves
Otolith reading
Issue Date: 1985
Publisher: INP (Ecuador)
Citation: Boletín Científico y Técnico, 8(4). p. 51-62
Abstract: 342 specimens of sparid Calamus brachysomus ”Palma”, collected during a demersal trawl survey by the R. V. Tohallí in April and May1983, were examined. The different techniques used to prepare scales and otoliths for ageing are described and analysed. The otoliths were determined to be the most reliable for ageing studies; 87% of otoliths were readable. The rings observed were assumed to be annual. The mean lengths at age were used to determine the parameters of the Von Bertalanffy growth formula, giving: Lt=50.13(1-e-0.1473(t+2.0704)). The growth curve obtained must be considered provisional due to possible biases in the interpretation of the otoliths, and also due to those arising from the selectivity of the fishing gear.
URI: http://hdl.handle.net/1834/3226
Appears in Collections:1. Boletín Científico y Técnico

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