RESEARCH REGARDING THE INFLUENCE OF SLAUGHTER AGE ON QUANTITY MEAT PRODUCTION OF THE ONCORHYNCHUS MYKISS SPECIES
I.B. Pagu, C.E. Nistor, Iuliana Mădălina Iordache, B. Păsărin
For human consumption is used only some parts from fish body, considerate to be eatable parts; establishment of these parts face to the whole fish differs from one breed to another. From a strict commercial point of view, from trout body interested the muscular tissue which has the greatest proportion. The current research was carried out on three batches of trout of different ages, in specific environmental conditions from NE area of Romania. During our investigations, the trout from the three batches were raised in the same environmental conditions, being slaughtered in August 2011, analysing the meat percent from carcass at all three ages. Mean corporal mass at slaughter for the first batch was 160.06 g, at second batch of 255.60 g and of 474.83 g at the last batch. The best efficiency at slaughter in carcass, respectively 81.81 % was recorded at the third batch of rainbow trout, while at the first batch we obtain the greatest value of the viscera-somatic index (17.56). The values of hepatic-somatic index did not have significant differences between the three batches.
Key words: slaughter yield, rainbow trout, age