Ana Paula Silva Ton

Glicerina bruta para codornas de corte, de um a 14 e de 15 a 35 dias de idade

Three experiments were carried out aiming to determine the nutritive value and verify the performance of meat quails feed with crude glycerin (CG). In the first trial 75 quails were used, allocated in a completely randomized design, consisting in three treatments and five replications. The treatments consisted of one reference diet (RD) and two test diets (TD), in which the CG replaced the RD at levels of eight and 12%. The estimated value of metabolizable energy corrected for nitrogen balance was 4,893kcal/kg. In experiment two o, from d 1 to 14, 1,320 not sexed quails were used, allotted in a completely randomized design, with six treatments and 4 four replications. The treatments consisted of six diets with increased levels of CG (0; 3; 6; 9; 12 and 15%). The live weight (LW), weight gain (WG), feed intake (FI), feed conversion (FC), biomass accumulated body (BAB) and litter moisture (LM) increased linearly with the inclusion of CG. Considering the performance data, it can be concluded that CG can be included in the diets up to15%. In experiment three, d 15 to 35, 1,032 quails were used, allocated under the same conditions of experiment two. The WG, FI, BAB, LM, breast weight (BW) and breast yield (BY) increased linearly with the inclusion of CG. Considering the performance data, it can be concluded that the CG can be included in the diets up to the level of 15%.

Exigência de treonina digestível para codornas de corte no período de 15 a 35 dias de idade

The digestible threonine (DThr) requirements for meat quails (Coturnix coturnix sp) during growing phase from 15 to 35 days of age were estimated, using 1,020 quails with 15 days of age, of both sexes, distributed in a completely randomized design, with six levels of digestible threonine - 0.93; 1.00; 1.07; 1.14; 1.21 and 1.28% in diet, five replications and 34 quails per experimental unit. There was no effect on performance variables, carcass yield and chemical composition and nitrogen balance with the studied increase in digestible threonine levels. There was a linear increase in threonine intake andfeed cost per kilogram of body weight gain with increasing levels of digestible threonine. It was concluded that the best level of threonine evaluated was sufficient to meet the requirements of meat quails, in the period from 15 to 35.

The effect of transport density and gender on skin temperature and carcass and meat quality in pigs

Pre-slaughter handling of pigs established properly is very important, not only from the point of view of welfare, but also for the quality of meat. The aim of present research was to evaluate the effect of gender and density of pigs during their transport to the abattoir on the skin temperature and carcass and meat quality. Were used 192 (115.54 ± 6.03 kg) finishing pigs to investigate the effects of gender (barrows and gilts) and transport densities for slaughter (236, 251, and 275 kg/m2) on the skin temperature and carcass and meat quality. Average skin temperature between genders and transport densities at any point of time during pre-slaughter did not differ. Skin temperatures before unloading had the highest average value relative to all other time points, followed by immediately after unloading and remaining the same for the next 2 h. Lowest skin temperature value was registered on pigs at the pre-slaughter time followed by farm and at loading times. Pigs transported with different densities did not show differences for the skin carcass lesions. Meat from pigs transported at 275 kg/m2 presented higher frequency of red, soft, exudative (RSE) and lower of red, firm, non-exudative (RFN) classes as compared to those for other densities. Animals transported at 236 and 251 kg/m2 did not differ as the frequency of RSE and RFN meat. Skin temperature of pigs oscillate along the pre-slaughter times and the pre-slaughter transport of pigs at 236 and 251 kg/m2 generates less frequency classes of faulty pork, although difference in the densities did not have any effect on the skin temperature and skin lesions.