Sperm quality parameters and sex steroid concentrations in male and female meagre (Argyrosomus regius) held under constant or cycling temperatures

The dataset contains excel files with sperm quality parameters measured with Computer Assisted Sperm Analysis (CASA), plasma sex steroids (testosterone, 11-ketotestosterone, estradiol and 17a,20β-dihydroxy-4-pregnen-3-one) measured with enzyme-linked immunosorbent assays (ELISAs), oocyte diameters and egg fecundity and % fertilisation data in the meagre <em>Argyrosomus regius</em> held under either attenuated seasonal water temperature (16.4 to 19.6ºC) or relatively constant water temperature (19.4 ± 0.6ºC).