160952 20251017144650.0 doi 10.1139/cjas-2023-0123 sideral 144127 ART-2025-144127 eng Canto, Francisco Melatonin implants in late pregnancy increase yield and enhance milk quality in dairy goats 2025 Access copy available to the general public Unrestricted This study investigated the effects of melatonin implants in pregnancy on milk production and composition, and the quality of colostrum in dairy goats. Thirty days before kidding, 92 goats (group MEL) received one melatonin implant, and the remaining 177 goats (group CON) did not. Three monthly milk evaluations included milk yield (kg/day), composition (%Fat, %Protein, % Lactose), daily yield (Fat, g/day Protein, g/day Lactose). A sample of colostrum was obtained from 165 goats, from which its composition, and IgG concentration were measured. MEL had a significantly ( P < 0.01) higher milk yield in the second month (3.16 ± 0.10 kg/day) than CON (2.78 ± 0.07 kg/day). In the three milk samplings, fat concentrations were significantly higher ( P < 0.05) in the MEL than in the CON does. In the second milk sampling, does that had received a melatonin implant produced higher ( P < 0.05) daily milk yield components than did non-implanted (Fat: 144 ± 6.0 vs. 115 ± 3.4; Protein: 104 ± 3.4 vs. 91 ± 2.5; Lactose: 148 ± 5.8 vs. 131 ± 4.3 g/day). In conclusion, melatonin implants administered 30 days before kidding increased milk production, the amounts of milk daily components in the second month of lactation, and the concentration of fat milk. info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Peña-Delgado, Victoria (orcid)0000-0002-4670-3735 Noya, Agustí (orcid)0000-0002-9552-4709 Manenti, Isabella Abecia, José Alfonso Universidad de Zaragoza (orcid)0000-0003-2827-3054 2008 700 Universidad de Zaragoza Dpto. Produc.Animal Cienc.Ali. Área Producción Animal 105 (2025), 33-62 Can. j. anim. sci. CANADIAN JOURNAL OF ANIMAL SCIENCE 0008-3984 349298 http://zaguan.unizar.es/record/160952/files/texto_completo.pdf Postprint 763267 http://zaguan.unizar.es/record/160952/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:160952 articulos driver 2025-10-17-14:36:10 ARTICLE