The pseudo-green water technique for intensive rearing of sea bream (Sparus aurata) larvae
ABSTRACT The pseudo green water technology for sea bream(Sparus aurata) larval rearing was evaluated by analyzingresults of a 2-year study, performed in a pilot scale system. Thetechnology is characterized by the daily addition of phytoplankton in therearing tanks during the first month of rearing. Effects of egg origin,spawningseason and initial larval density on the larval rearing were investigated. Fishreared in pseudo green water systems for 60 days, presented highbiological performance in terms of survival (56 16%), meanweight (62 12 mg), total length (20 1mm), conformity with wild standard (88 9%), andfunctional swim bladder (93 4%). The results present homogenitybetween the categories (origin of eggs, time of spawning, initial egg density)studied, proving the stability of the technology.
Article: Comparative Ontogeny of the Digestive Tract in Sharpsnout Sea Bream Diplodus puntazzo Cetti and Common Pandora Pagellus erythrinus L.[show abstract] [hide abstract]
ABSTRACT: The ontogeny of the alimentary tract and its associated structures (liver, pancreas, gall bladder) was compared between sharpsnout sea bream Diplodus puntazzo and Pagellus erythrinus and some differences were highlighted. The first goblet cells appeared earlier in sharpsnout seabream (5-7 DAH) and later in common pandora (9-11 DAH), as well as taste buds which appeared at 11 DAH in sharpsnout seabream and at 17 DAH in common pandora. On the contrary, stomach segmentation in a cardiac, fundic and pyloric portions was more precocious in common pandora than in sharpsnout seabream, although gastric glands were formed almost simultaneously. Early caecal development was much more precocious in sharpsnout seabream (10 DAH) than in common pandora (22 DAH). At 3 DAH in sharpsnout seabream and later (10 DAH) in common pandora, primordial mucosal folding of intestine began, which appeared well developed in the anterior portion, by 22 DAH in common pandora and by 28 DAH in sharpsnout seabream. The functional meanings of these aspects were discussed comparatively.The Open Marine Biology Journal 01/2011; 511:34-41.