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Hormonal induction of Atlantic dusky grouper (Epinephelus marginatus) broodstock
Conceição, L. E. C.; Cabrita, E.; Engrola, S.; Lacuisse, M.; Pousão-Ferreira, P.; Dinis, Maria TeresaImmature fish and young females were sex reversed using hormonal induction in two consecutive years. In the first year one permanent male was obtained. Collected sperm of both years ranges from 30 μl to 300 μl and cell concentration varies from 3 to 6.5 x109 spermatozoa/ml. Atlantic dusky grouper can successfully be induced to functional males with 17α-methyltestosterone implants.
Do dietary amino acid profiles affect performance of larval gilthead seabream?
Aragão, C.; Conceição, L. E. C.; Lacuisse, M.; Yúfera, M.; Dinis, Maria TeresaLive preys commonly used in fish larval rearing seem to be imbalanced in terms of amino acids. Manipulation of their amino acid composition is di fficult, but the use of microencapsulated diets allows this manipulation. This study analysed the effect of amino acid supplementation, in order to compensate for dietary amino acid imbalances, on growth and survival of gilthead seabream ( Sparus aurata ) larvae.
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