Scientia Marina, Vol 69, No 2 (2005)

Reproductive aspects of Microchirus azevia (Risso, 1810) (Pisces: Soleidae) from the south coast of Portugal


https://doi.org/10.3989/scimar.2005.69n2275

Isabel Afonso-Dias
CCMar, FCMA - Universidade do Algarve, Portugal

Catarina Reis
Universidade do Algarve, FCMA/CCMar, Portugal

J. Pedro Andrade
Universidade do Algarve, FCMA/CCMar, Portugal

Abstract


Fresh fish obtained from commercial landings in the harbours of Olhão and Quarteira (south Portugal) in 1998 and 1999, were examined in order to study different aspects of the reproductive biology of Microchirus azevia (Risso, 1810): spawning season, ovary maturation, length/age at first maturity and sex ratio. A five-stage maturity scale, based on external appearance was used to classify the ovaries. M. azevia is a winter-spring batch spawner with a protracted spawning season. Females outnumbered males in length classes greater than 19 cm and in all age groups. The estimated mean size at first maturity (L50%) for females was 23 cm total length at 3 years of age (t50%).

Keywords


reproduction; Microchirus azevia; maturity

Full Text:


PDF


Copyright (c) 2005 Consejo Superior de Investigaciones Científicas (CSIC)

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.


Contact us scimar@icm.csic.es

Technical support soporte.tecnico.revistas@csic.es