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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on November 19, 2007
ICES Journal of Marine Science: Journal du Conseil 2008 65(1):17-24; doi:10.1093/icesjms/fsm166
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© 2007 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Experimental study of the dependence of embryonic development of Trachurus trachurus eggs on temperature

M. Emília Cunha1,, Catarina Vendrell2 and Patrícia Gonçalves2

1 Estação Piloto de Piscicultura de Olhão, L-IPIMAR/CRIPSul, Av. 5 de Outubro s/n, 8700-305 Olhão, Portugal
2 L-IPIMAR, Av. de Brasília, 1449-006 Lisboa, Portugal

Correspondence to M. E. Cunha: tel: +351 289715346; fax: +351 289715579; e-mail: micunha{at}ipimar.pt

Cunha, M. E., Vendrell, C., and Gonçalves, P. 2008. Experimental study of the dependence of embryonic development of Trachurus trachurus eggs on temperature. – ICES Journal of Marine Science, 65: 17–24.

To determine the effect of temperature on the development rates of artificially fertilized eggs of Trachurus trachurus, experiments were carried out at temperatures ranging from 10.5°C to 19°C. Egg development through to hatching only took place at 11.7–19°C. At lower temperature, eggs did not develop beyond the stage where the outline of the embryo was clearly discernible and a defined median line of the embryonic shield (stage 4 in this study) was apparent. Development time took from 46 h at 19°C to 126 h at 12°C. A generalized linear model of the stage-dependent development time (age) as a function of incubation temperature was developed. The data are also compared with those reported in the literature and related to sea temperature on the spawning grounds.

Keywords: egg development, NE Atlantic, temperature, Trachurus trachurus

Received 14 April 2007; accepted 17 October 2007; advance access publication 19 November 2007.


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