This study aimed to determine the effect of the energy / protein ratio of supplementary feed rations (RAS) on the production and characteristics of milk under natural hypobaric conditions (4300 m altitude in Puno, Peru). A total of 24 Brown Swiss cows in first and second third of lactation were distributed in three RAS with three ratios of metabolizable energy / protein (RAS1: 17.0 kcal/g; RAS2: 14.2 kcal/g; RAS3: 12.4 kcal/g) and as a protein source three levels of hydrolysed sheep and alpaca skins – Pioval-2® (0, 3 and 6%, respectively) and three levels of extruded whole soymeal (0, 10 and 25%, respectively). The cows were grazing on alfalfa associated with rye grass and supplemented with oat silage. Daily milk yield (DMY) was recorded for 45 days, as well as density (DE), total solids (TS), fat (FA) and milk urea nitrogen (MUN) at 0, 15, 30 and 45 days. The RAS did not affect the D...

This study aimed to determine the effect of the energy / protein ratio of supplementary feed rations (RAS) on the production and characteristics of milk under natural hypobaric conditions (4300 m altitude in Puno, Peru). A total of 24 Brown Swiss cows in first and second third of lactation were distributed in three RAS with three ratios of metabolizable energy / protein (RAS1: 17.0 kcal/g; RAS2: 14.2 kcal/g; RAS3: 12.4 kcal/g) and as a protein source three levels of hydrolysed sheep and alpaca skins – Pioval-2® (0, 3 and 6%, respectively) and three levels of extruded whole soymeal (0, 10 and 25%, respectively). The cows were grazing on alfalfa associated with rye grass and supplemented with oat silage. Daily milk yield (DMY) was recorded for 45 days, as well as density (DE), total solids (TS), fat (FA) and milk urea nitrogen (MUN) at 0, 15, 30 and 45 days. The RAS did not affect the D...

The study aimed to determine the effect of the level of inclusion of silage from trout residues (ERT) in concentrate feed on body weight, feed intake, feed conversion of pigs and taste of pig meat. Three treatments were applied: a control (T1, 0%) and two treated groups with 5% (T2) and 10% (T3) of ERT in the ration, with five replicates per treatment. Thirty non-castrated male pigs (York-Duroc-Landrace) of 45 days of age were used. Feeds for the growing and finishing phase were formulated to be similar in protein (CP) and energy (ME) content (growing: 16.0% CP and 3.20 Mcal ME/kg and finishing: 13.0% CP and 3.20 Mcal ME/kg) and were administered ad libitum during 98 days. Body weight, feed intake and feed conversion rate were determined at 56 and 98 days. In addition, a sensory test of meat was carried out at the end of the study to evaluate the taste of the meat. The results at day 98 ...

The aim of this study was to determine the effect of two feeding regimes (7 vs 6 d) and three commercial foods (TO= Tomasino®, NA= Naltech® and SA= Salmofood®) on the productive-commercial performance and organ development. of rainbow trout in the fattening phase under conditions of Lake Titicaca, Peru. A total of 1080 trout of 185 g live weight (LW), 26.5 cm total length (TL) and 1.00 body condition index (BCI) were randomly placed in 36 1.2x1.2x1.6 m nylon cages (30 trout/cage). The control of productive parameters (LW, TL and feed consumption) was carried out at 30, 60 and 90 d. The BCI, the mean daily feed intake (DFI), the mean daily weight gain (DWG) and the feed conversion ratio (FCR) were determined. The carcass yield (CY), fillet yield (FY), pigmentation (MP) and the relative weight of the organs were determined at 215 d. The feeding regime did not affect the LW, TL and BCI, ...

The study aimed to determine the effect of the level of inclusion of silage from trout residues (ERT) in concentrate feed on body weight, feed intake, feed conversion of pigs and taste of pig meat. Three treatments were applied: a control (T1, 0%) and two treated groups with 5% (T2) and 10% (T3) of ERT in the ration, with five replicates per treatment. Thirty non-castrated male pigs (York-Duroc-Landrace) of 45 days of age were used. Feeds for the growing and finishing phase were formulated to be similar in protein (CP) and energy (ME) content (growing: 16.0% CP and 3.20 Mcal ME/kg and finishing: 13.0% CP and 3.20 Mcal ME/kg) and were administered ad libitum during 98 days. Body weight, feed intake and feed conversion rate were determined at 56 and 98 days. In addition, a sensory test of meat was carried out at the end of the study to evaluate the taste of the meat. The results at day 98 ...

Puno is the first rainbow trout producing region in Peru. The objective of the study was to study the feasibility of giving added value to trout. The cost analysis and financial viability of the production of six types of canned pickled trout preserves were considered. The fillets were obtained from trout fed with three commercial foods (Salmofood®, Naltech® and Tomasino®) and the preserves had two presentations (can vs. glass). The production costs were calculated through a documented record of data at market prices. The general theory of production costs was applied and through the cash flow financial tool the profitability indicators were found. The financial net present value (NPVf) was positive for all six presentations. The internal rate of return (IRR), both for canning (34.5, 37.5 and 42.8%) and for glass canning (34.7, 38.2 and 44.3%) was higher than the opportunity cost of c...