Pregledni rad
Eutrofication risks as a consequence of uncontrolled feeding of the marine fish in the cages
I. Katavić
Sažetak
Vigorous development of industrial cage fish breeding has brought mariculture into conflict with numerous users of coastal zones raising, at the same time, a whole series of open questions on its ecological sustainability, economic efficiency and social justification. With respect to biophysical and geomorphological specific qualities of the Adriatic sea, particularly its productive and dispersion mechanisms the public is particularly worried about the unavoidable organic waste and possible eutrophic processes in the ecosystem of the sea. Following the available data connected with the environmental aspects of mariculture, particularly in the Mediterranean, as well as the improvement of the system and technology of feed production a detailed nutrient quantification is given, which in cage breeding ends up in the sea. Recent zootechnical measures, selection of feed ingredients, the increase of fat as the main energy source at the expense of proteins have resulted in significant improvement of ecological and economic performance in cage breeding. It has been established that the risks of eutrophication in the olygotrophyc sea like the Adriatic are quite small. Negative ecological effects are possible on a local level, par¬ticularly if cage breeding is in geomorphologically inadequate zones and if due to poor management there is a great waste of feed.
Ključne riječi
fish feeding; eutrophication; cage breeding
Hrčak ID:
4504
URI
Datum izdavanja:
10.7.2006.
Posjeta: 3.219 *