PRELIMINARY RESULTS OF A RESEARCH ON NUTRITION AND FEEDING OF YELLOWFIN TUNA (THUNNUS ALBACARES) AND BIGEYE TUNA (THUNNUS OBESUS) CULTURED IN CAGE IN V

Abstract

Yellowfin tuna and bigeye tuna were cultured with the feeds of herring and scad in two cylindrical cages in Van Phong gulf, Khanh Hoa province from April 2013 to August 2014. Daily rations in the first 3 months were in the range of 5.9-8.3% (7.3% on average) of body weight, and ranged from 5 to 7% of body weight in next period. Feed conversion ratio (FCR) was 16.1 on average, in the range from 9.4 to 42.2. Decrease of the water temperature tended to increase of FCR of the fishes. These results are part of the national subproject “Research on commercial raising of yellowfin tuna (Thunnus albacares) and bigeye tuna (Thunnus obesus) in Vietnam”, code KC06.07/11-15, which was implemented by Research Institute for Marine Fisheries.