Mogućnosti korišćenja mikroinkapsulirane hrane za larve šarana (cyprinus carpio)

Glavni cilj trenutnih istraživanja u oblasti ishrane larvi vezano je za potencijale novih tehnologija i strategija ishrane. Formulisana je suva hrana sa hidrolizovanim proteinima mora i mikroinkapsuliranim vitaminima (C i E). .U toku 24 dana eksperimenta na larvama šarana, počev od 3 dana posle izleganja, testirano je 5 različitih strategija ishrane sa Artemia nauplii i suvom hranom. Na kraju perioda u kome su larve bile izložene ograničenom prostoru i uslovima stresa usled hladnoće smeštene su u odgovarajući prostor na jedan sat. Pre i posle izlaganja stresu izmereni su nivoi prethodno pomenutih vitamina HPLC metodom. Statistički značajne razlike na nivo preživljavanja pokazale su se posle 15 Dph, kada su mali prirast i preživljavanje utvrđeni u oglednim grupama, osim u kontrolnoj grupi. Za vreme delovanja stresora sadržaj vitamina C opadao je ka niskim vrednostima slično u svim grupama, međutim potrošnja vitamina E je bila manja. Nivo vitamina E bio je viši u grupama koje su duže vreme hranjene suvom hranom obogaćenom inkapsuliranim vitaminima.. U pozadini slabih rezultata prirasta pri korišćenju suve hrane možemo reći da je sposobnost suočavanja sa stresorom bila dobra kod larvi šarana starih 24 dana. Korišćenje formulisanih mikroinkapsuliranih smeša kao početne hrane za larve obećava, ali moraju da se razviju tehnike ishrane i bolja strategija, na primer modifikovanjem učestalosti hranjenja

Recommendations for responsible aquaculture

Aquaculture has grown rapidly in Asia. In 1992, out of the 52.8 million tons of total production of aquatic organisms, as much as 17 million tons (32.2%) came from aquaculture. However, unplanned and uncontrolled development of aquaculture has led occasionally to environmental damage and social disruption in many countries. Now attention has focused on the sustainability of aquaculture. Negative impacts of shrimp culture have been well publicized, but problems have also been caused by overinvestments in fish and mollusk culture. As sustainability is a highly complex issue, it is important to develop internationally accepted principles and guidelines for responsible aquaculture, with the use of technologies not detrimental to natural resources, ecosystems and human communities. FAO is now in the process of developing an International Code of Conduct for Responsible Fishing based on the Declaration of Cancun. One chapter of the Code will deal with aquaculture. Unfortunately, information is rather scanty on the environmental impacts of various aquaculture systems and the carrying capacity of aquatic ecosystems, especially in tropical areas. Therefore, research on these topics should receive high priority. Similarly, tightening and enforcing the rules and regulationsgoverning existing and new aquaculture ventures is a pressing task that responsible government agencies can not postpone any longer

In the beginning

The original publication can be found at www.springerlink.comIn this paper, a survey is made of some of the contributions to the interpretation of Hartle and Hawking’s theory of the wave function of the universe and its beginning. It is argued that there are considerable difficulties with the interpretation of the theory, but that there is at least one interpretation hitherto not found in the literature which survives existing philosophical objections.Chris Mortensen and Julianna Csava