Efecto de la restricción alimentaria sobre los índices productivos e incidencia de ascitis en pollos COBB 500

Abstract

In this study, 120 birds were randomized in an experimental setup (DCA), to examine how food restriction affected production rates and the incidence of ascites in COBB 500 hens. Experimental animals were split into four blocks, each with three repetitions: control (T0), ten percent (T1), fifteen percent (T2), and twenty percent (20%) limitations. From day 1 to day 20, the same nutritional table, vaccination regimen, and management system were followed, in line with the needs and recommendations of the Cobb 500 dietary tables (2018). According to Cobb Vantress tables, a quantitative restriction (10, 15, and 20%) was implemented as of day 21. Food was weighed daily from day 21 to 42 in accordance with the recommended restriction tables for each therapy. Analysis of variance and Tukey's test at 5% were used to analyze weights at weeks 1, 21, 35, and 42, weight increase, mortality, feed conversion, and production costs. We measured the presence of ascites from clinical observation and symptoms recorded (Table 13); postmortem organs and the interaction of the heart were analyzed. There were significant differences (p0.005) between the averages; T3 (20 percent limitation) produced the largest results in terms of productivity indices (table 4.5). As far as the incidence of the ascites syndrome is concerned, the T2 (15 percent restriction) and T3 (20 percent restriction) were the treatments of choice, regardless of the total ventricular mass and right ventricle, as well as postmortem symptoms and clinical signs. The clinical indications and pathologic changes they observed were minor in comparison to T0 (control) and T1 (10% limitation).