119985 20240319081027.0 doi 10.1111/rda.14120 sideral 128849 ART-2022-128849 eng Arrebola, Francisco Comparison of four strategies of ram management in a semen collection centre 2022 Access copy available to the general public Unrestricted Thirty Merino rams were used to determine the effect of four management systems of rams on semen quality during the anoestrous season. Animals were divided into four groups: Artificial-Photoperiod group (AP; n = 8), which were isolated from females and exposed to artificial long days (16 hr/d) from 1 Feb to 15 Mar; Natural-Photoperiod (NP; n = 8), isolated from females and exposed to the natural photoperiod throughout the experiment; Oestrous-Ewe group (EE; n = 7), housed in a pen adjacent to another pen that housed three ewes in oestrus, and Anestric-Ewe group (AE; n = 7), housed adjacent to another pen that housed three ovariectomized ewes. From 20 Mar to the end of May (10 weeks), semen samples were collected weekly, and blood samples were collected to determine plasma testosterone concentrations. Mean plasma testosterone concentrations, ejaculate volume and reaction time were not affected either by treatment or week. There was a significant effect (p < .01) of ram treatment on sperm concentration, and both TM y PM, and their interaction, were significantly affected by group and week (p < .001). Rams exposed to ewes in oestrus presented the largest sperm concentration (p < .05) compared with the other three groups, although they had the lowest total and progressive motilities (p < .01). In conclusion, management strategy in spring affects semen quality of rams, with the presence of ewes in oestrus being the best plan to increase sperm concentration. info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 1.7 2022 VETERINARY SCIENCES 55 / 144 = 0.382 2022 Q2 T2 AGRICULTURE, DAIRY & ANIMAL SCIENCE 33 / 62 = 0.532 2022 Q3 T2 REPRODUCTIVE BIOLOGY 29 / 31 = 0.935 2022 Q4 T3 0.465 2022 Animal Science and Zoology 2022 Q2 Endocrinology 2022 Q3 Biotechnology 2022 Q3 3.2 2022 info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/publishedVersion Castillejo-Lacalle, Esteban Borjas-Muñoz, Francisco Querino-Santiago, Francisco J. Redondo-Cardador, Francisca C. Abecia, José-Alfonso Universidad de Zaragoza (orcid)0000-0003-2827-3054 2008 700 Universidad de Zaragoza Dpto. Produc.Animal Cienc.Ali. Área Producción Animal 57, Suppl. 5 (2022), 103-105 Reprod. domest. anim. Reproduction in Domestic Animals 0936-6768 303008 http://zaguan.unizar.es/record/119985/files/texto_completo.pdf Versión publicada 2195008 http://zaguan.unizar.es/record/119985/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:119985 articulos driver 2024-03-18-16:48:22 ARTICLE