Now showing items 1-4 of 4

    • Article

      Decapsulation of Artemia cysts: A simple technique for the improvement of the use of brine shrimp in aquaculture 

      P Sorgeloos, E Bossuyt, EM Laviña, M Baeza-Mesa & G Persoone - Aquaculture, 1977 - Elsevier
      Although it is a common practice in different disciplines of fundamental research on the brine shrimp, and despite the very interesting applications that it offers for the use of Artemia in aquaculture, the "decapsulation" technique, which removes the outer layer of the cyst shell of Artemia, is not known to shrimp and fish aquaculturists.

      The present paper describes the technology developed by the authors for the routine decapsulation of Artemia cysts. The advantages which result from the use of decapsulated cysts in aquacultural hatcheries are discussed.
    • Article

      International study on Artemia. XXV. Factors determining the nutritional effectiveness of Artemia: The relative impact of chlorinated hydrocarbons and essential fatty acids in San Francisco Bay and San Pablo Bay Artemia 

      P Léger, P Sorgeloos, OM Millamena & KL Simpson - Journal of Experimental Marine Biology and Ecology, 1985 - Elsevier
      Different Artemia cyst samples harvested from the San Francisco and the San Pablo Bay regions (California, U.S.A.), and suspect because of their poor nutritional performance in fish and crustacean farming, have been analysed for their chlorinated hydrocarbon and fatty acid content. These results have been correlated with survival, growth, and biomass production of larvae of the marine crustacean Mysidopsisbahia Molenock fed those different Artemia in a standard culture test. Differences in chlorinated hydrocarbon content do not correlate with differences in mysid culture performance. Fatty acid profiles reveal three groups of Artemia batches with high, intermediate, and low levels of the highly unsaturated fatty acid 20:5ω3. The production yield of the mysid larvae could be correlated with the relative level of the 20:5ω3 fatty acid in the Artemia nauplii.
    • Conference paper

      Optimized feeding strategies in the larviculture of the Asian seabass Lates calcarifer. 

      P Dhert, M Duray, P Lavens & P Sorgeloos - In R Hirano & I Hanyu (Eds.), The Second Asian Fisheries Forum. Proceedings of the Second Asian Fisheries Forum, 17-22 April 1989, Tokyo, Japan, 1990 - Asian Fisheries Society
      This paper reports on the progress made at the Tigbauan hatchery of SEAFDEC in the Philippines, with the larviculture of the Asian seabass Lates calcarifer when using w3-HUFA enriched Brachionus and Artemia . In view of the high correlation between mouth size and total larval length, the feeding of different size classes of Artemia can be better programmed. The incorporation of the HUFA s 20:5w3 and 22:6w3 in the live prey Artemia , and possibly Brachionus , greatly improved larval ability to metamorphose, although it did not affect growth nor survival until day 21. However, when 21 day old fry were subjected to a stress test, much higher survival rates were obtained in HUFA-enriched seabass larvae, illustrating their superior physiological condition over fry cultured with non-enriched Brachionus and Artemia . These findings were used to propose an improved feeding strategy for the larviculture of Lates calcarifer .
    • Conference paper

      Successful inoculation of Artemia and production of cysts in man-made salterns in the Philippines 

      C de los Santos Jr., P Sorgeloos, A Bernardino & EM Laviña - In G Persoone, P Sorgeloos, O Roels & E Jaspers (Eds.), The Brine Shrimp Artemia. Proceedings of the International Symposium on the brine shrimp Artemia salina, Corpus Christi, Texas, USA, August 20-23, 1979., 1980 - Universa Press
      The objective of the inoculation described in this paper was to test the feasibility of culturing Artemia in man-made earthen salterns and of producing adults and cysts for use in aquaculture projects in the Philippines. San Francisco Bay (California, USA) Artemia were inoculated in two concrete tanks and in four earthen ponds which are part of a small local salt factory.

      It was found that Artemia can be grown (with continuous production of nauplii and cysts) year-round in covered concrete tanks and in open concrete tanks and earthen ponds during the dry season (February to June). Lethal effects of too high water temperatures (>35°C) to the cultures were anticipated by the use of green coconut fronds placed on the water surface alongside the walls of the tanks and the earthen dikes.

      Rice bran enriched with vitamins and traces of minerals appeared to be a good food for Artemia cultured in aerated concrete tanks; in the earthen salt ponds the brine shrimp grew well on the natural food present.

      Over a 3 month production period, 26 kg dry weight cysts and 150 kg live weight adults have been harvested from a total surface of 1.7 ha of salt ponds and brine tanks.