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The aim of the present study was to verify the feasibility of using live Artemia salina nauplii embedded with fluorochromes for the mass marking of pike Esox lucius (L.) larvae. In the experiment, pike larvae 6 days post hatch were fed ad libitum with nauplii dyed with 600 ppm tetracycline hydrochloride (TC) or 200 ppm alizarin red S (ARS) for 3 or 6 days. The highest percentage of marked fish (100%) and the best quality of this marking was found in the groups fed A. salina stained with TC for either 3 or 6 days. In groups fed A. salina stained with ARS for 3 or 6 days exhibited a lower percentage of marked fish (ranging from 76.7–88.3%). No significant differences between experimental groups were noted regarding survival rate, final body weight and length of the reared pike larvae.
Studies revealed the role of Artemia salina as intermediate host in the life-cycle of a cestode species parasitizing flamingos, i.e. Flamingolepis liguloides. Cysticercoids of this parasite were found for the first time in the Algerian populations of Artemia salina in winter of 2000 and 2001 in Chott Marouane and spring of 2003 in Sebkha Ez-Zemoul. The prevalence ranged between 10 and 33% for the two examined Artemia populations. The intensity of infection was 1–3 cysticercoids per individual. The abdomen was the most targeted site of infection (95% of the population of Sebkha Ez-Zemoul) followed by the thorax and the ovisac. Infected females were less fertile than uninfected ones (24.83 vs 43.70 cysts/brood) in Sebkha Ez-Zemoul or castrated in Chott Marouane.
The mass production of live food organisms Brachionus plicatilis and Artemia salina are important and necessary for the rearing of sea bass larvae in Malaysian aquaculture. The marine Chlorella and brewer’s yeast were fed to rotifers which in turn were fed to fish larvae. Marine Chlorella contained large amounts of 16:0, 16:1 and 20:5w3 but was poor in 18:3w3. The major fatty acids in the yeast were 16:0, 16:1, 18:1, and 18:2w6. The rotifers and Artemia contained large amounts of 18:2w6, 18:3w3 and 20:5w3 but were poor in 22:6w3. The food value for Artemia nauplii was better than that of the adult. The food organisms under investigation contained the necessary w-3 highly unsaturated fatty acid (HUFA) series necessary for growth and survival rates of fish larvae.
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