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Latin american journal of aquatic research

versión On-line ISSN 0718-560X

Resumen

CUBILLOS, Luis  y  ALARCON, Carolina. Estimation of size at first maturity for Trachurus murphyi using relative oxygen consumption. Lat. Am. J. Aquat. Res. [online]. 2010, vol.38, n.2, pp.178-187. ISSN 0718-560X.

An alternative method was used to estimate size at maturity for jack mackerel. This method considers relative oxygen consumption as a function of body weight and the consistency of relative oxygen consumption at the size at first maturity and at the asymptotic size in teleosts. Variance in the estimation was evaluated with the Monte Cario method and considering the uncertainty in the parameters of the length-weight relationship and relative oxygen consumption. Size at first maturity was estimated to be 25.5 cm fork length (17.7-31.3 cm), which was similar to other estimates made using histological analyses of mature females. The method was applied to other species with the objective of demonstrating its usefulness for estimating size at first maturity in fishes.

Palabras clave : size at maturity; oxygen consumption; length-weight relationship; jack mackerel; Pauly's hypothesis (1984); Chile.

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