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

2007; Oxford University Press; Volume: 65; Issue: 1 Linguagem: Inglês

10.1093/icesjms/fsm166

1095-9289

Maria Emília Cunha, Catarina Vendrell, Patrícia Gonçalves,

Reproductive biology and impacts on aquatic species

Abstract 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.