https://revistas.udea.edu.co/index.php/rccp/issue/feed Revista Colombiana de Ciencias Pecuarias 2025-04-01T00:00:00-05:00 Editor-in-chief: Natalia Franco-Montoya, PhD rccp.fcag@udea.edu.co Open Journal Systems <p><strong> </strong></p> <ul> <li class="show"><strong>ISSN electrónico: </strong>2256-2958</li> <li class="show"><strong>Periodicidad:</strong> Trimestral</li> <li class="show"><strong>Creative Commons:</strong> <a href="https://creativecommons.org/licenses/by-nc-sa/2.5/co/" target="_blank" rel="noopener">by-nc-sa</a></li> </ul> https://revistas.udea.edu.co/index.php/rccp/article/view/355898 Ejaculate traits of ram lambs with different rectal temperatures under heat stress conditions 2024-09-17T09:47:17-05:00 Jorge Humberto McCormick Palacios jorge.mc@uabc.edu.mx Gustavo Ramírez-Valverde gramirez@colpos.mx Canuto Muñoz-García cmunoz@uagro.mx Jorge Alonso Maldonado Jáquez maldonadoj.jorge@hotmail.com Saúl Hernández Aquino saul.hernandez.aquino@uabc.edu.mx Rodrigo Flores Garivay rodrigo.flores.garivay@uabc.edu.mx Reyna Lucero Camacho Morales lucero.camacho@uabc.edu.mx Ernesto Avelar Lozano avelare@uabc.edu.mx Juan González Maldonado juan.gonzalez.maldonado@uabc.edu.mx <p><span class="fontstyle0"><strong>Background:</strong> Heat stress reduces semen quality in rams. <strong>Objective:</strong> To evaluate the productive and reproductive responses of rams and ram lambs with different rectal temperatures under heat stress conditions. <strong>Methods:</strong> The animals (n = 12, Dorper × Katadhin × Pelibuey crossbreed, aged 235 to 730 days) were assigned to one of three experimental groups: ram lambs with low rectal temperature (RLLRT), ram lambs with high rectal temperature (RLHRT), and Rams. <strong>Results:</strong> Afternoon rectal temperatures were higher (p ≤ 0.05) in the RLHRT group, and there was no difference (p &gt; 0.05) between the Rams and RLHRT groups. Ejaculate volume and sperm concentration were higher (p ≤ 0.05) in the Rams group than in the RLLRT and RLHRT groups. Mass motility and sperm concentration were lower (p ≤ 0.05) in the RLLRT group than in the RLHRT and Rams groups. Average daily weight gain did not differ (p &gt; 0.05) between the RLLRT and RLHRT groups. <strong>Conclusion:</strong> The selection of ram lambs with low rectal temperature under heat stress conditions did not provide any benefit in terms of average daily weight gain or ejaculate traits.</span> </p> 2024-12-06T00:00:00-05:00 Copyright (c) 2021 Revista Colombiana de Ciencias Pecuarias https://revistas.udea.edu.co/index.php/rccp/article/view/356194 Effect of feeding carrot flour on performance and profitability of broilers 2024-09-07T17:16:41-05:00 Janeth Jácome Gómez janeth_jacomeg@hotmail.com Gina Loor Moreira gina.loor@uleam.edu.ec Marco De la Cruz Chicaiza marco.delacruz@uleam.edu.ec Janeth Intriago Vera janeth.intriago@uleam.edu.ec Jeniffer Espinoza Zambrano jeniffer.espinoza@uleam.edu.ec Milton Zambrano Rivera milton.zambrano@uleam.edu.ec <p><span class="fontstyle0"><strong>Background:</strong> The quality of chicken meat, essential for consumer satisfaction, is influenced by skin pigmentation. The lack of carotenoids in conventional diets has driven the search for costeffective alternatives to enhance these aspects in poultry production. <strong>Objective:</strong> This study assessed the impact of partially replacing commercial balanced feed with different levels of carrot flour (</span><em><span class="fontstyle2">Daucus carota </span></em><span class="fontstyle0">subsp. </span><em><span class="fontstyle2">sativus</span></em><span class="fontstyle0">) on productive parameters and the pigmentation of broiler chickens. <strong>Methods:</strong> Sixty-four Cobb 500 birds were randomly assigned to four experimental diets, each with eight replicates of two birds. The control group (T0) received a standard diet, while the experimental groups received a diet with 10% (T1), 15% (T2), and 20% (T3) replacement with carrot flour (CF). Variables such as feed consumption, weight gain, feed conversion, mortality, skin pigmentation, and profitability were evaluated. <strong>Results:</strong> Treatments with 15% and 20% CF resulted in significantly higher feed consumption (p &lt; 0.05) compared to the control group. Although weight gain did not show significant differences between groups (p &gt; 0.05), a trend towards higher gains was observed in the experimental groups. The feed conversion ratio increased non-significantly (p &gt; 0.05) with higher CF concentrations. No mortality was observed in the experimental groups, whereas the control group had a mortality rate of 12.5%. Regarding pigmentation, CF influenced skin color as its concentration in the diet increased. In terms of profitability, the 15% replacement treatment stood out by generating higher income and a superior cost-benefit ratio. <strong>Conclusion:</strong> Orange cultivar CF can be a viable dietary source of natural pigment for broiler chickens. It may also be beneficial in promoting weight gain and reducing mortality, translating into economic advantages.</span></p> 2024-12-11T00:00:00-05:00 Copyright (c) 2021 Revista Colombiana de Ciencias Pecuarias