Ingestive behaviour, performance, and methane emissions of pregnant alpacas grazing cultivated pastures in the high Peruvian Andes
This study compares grazing patterns, animal performance, and enteric methane emissions (CH4) of female alpacas (Huacaya and Suri) at two periods of their late pregnancy. Animals were rotationally grazed on a mixed sward at high Peruvian Andes conditions. This study involved two experimental periods...
| Autores principales: | , , , , , , , , , , , , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2025
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/22670 https://www.sciencedirect.com/science/article/pii/S1871141325000289 https://doi.org/10.1016/j.livsci.2025.105665 |
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| author | Gualdron-Duarte, Laura Bibiana Loza, Cecilia Gere, José Ignacio Huanca Marca, Nancy Franco, Francisco Sanca Uscamayta, Yemi García Ticllacuri, Ruben Orellana Ligas, Guadalupe López, Diannett Benito Rivera Pachiño, Feliciano Moscoso Muñoz, Juan Díaz Céspedes, Medardo Collazos Paucar, Lizbeth Pinares Patiño, César Vélez Marroquín, Víctor Cabezas García, Edward |
| author_browse | Cabezas García, Edward Collazos Paucar, Lizbeth Díaz Céspedes, Medardo Franco, Francisco García Ticllacuri, Ruben Gere, José Ignacio Gualdron-Duarte, Laura Bibiana Huanca Marca, Nancy Loza, Cecilia López, Diannett Benito Moscoso Muñoz, Juan Orellana Ligas, Guadalupe Pinares Patiño, César Rivera Pachiño, Feliciano Sanca Uscamayta, Yemi Vélez Marroquín, Víctor |
| author_facet | Gualdron-Duarte, Laura Bibiana Loza, Cecilia Gere, José Ignacio Huanca Marca, Nancy Franco, Francisco Sanca Uscamayta, Yemi García Ticllacuri, Ruben Orellana Ligas, Guadalupe López, Diannett Benito Rivera Pachiño, Feliciano Moscoso Muñoz, Juan Díaz Céspedes, Medardo Collazos Paucar, Lizbeth Pinares Patiño, César Vélez Marroquín, Víctor Cabezas García, Edward |
| author_sort | Gualdron-Duarte, Laura Bibiana |
| collection | INTA Digital |
| description | This study compares grazing patterns, animal performance, and enteric methane emissions (CH4) of female alpacas (Huacaya and Suri) at two periods of their late pregnancy. Animals were rotationally grazed on a mixed sward at high Peruvian Andes conditions. This study involved two experimental periods (P1 and P2), each lasting 26 days. P1 took place in November 2021, corresponding to the end of dry season (‘Transition period’), whereas P2 was conducted in January 2022, with this coinciding with the beginning of rainy season (‘Wet period’). Forage selectivity was measured using hand plucking of forage harvested, whereas grazing behaviour was recorded by visual observation. Dry matter intake (DMI) was estimated from total faecal collection and in vitro forage digestibility. Fleece characteristics were measured following standard procedures adopted by the local industry. The sulphur hexafluoride (SF6) gas-tracer technique was used to estimate CH4 emissions. Data were analysed by a repeated measures model including both alpaca variety and period as fixed effects, whereas alpaca within variety was considered as random. No differences were detected among alpaca varieties either in terms of forage selectivity, grazing behaviour (except for biting rate) or feed intake. Regardless of period, grasses were the main dietary components (≥ 78 %). The proportion of leaves consumed lowered from 84 to 70% and presence of both legumes and herbs increased during P2. Increased nutritional requirements prior to parturition in conjunction with reduced forage quality and DMI (P = 0.004) during P2 led to negative energy and protein balances. This was aligned with increases in fibre growth and diameter, prior to parturition (P ≤ 0.035). Suri displayed faster fibre growth than Huacaya (P = 0.005). Although Huacaya females tended to emit more enteric CH4 per unit of metabolic live weight than Suri (P = 0.056), this was not reflected either on variety differences in emissions per unit of intake or fleece produced. On average, CH4 intensity decreased from 0.805 (P1) to 0.530 g/kg clean fleece at P2 (P = 0.032). Results are valuable towards fine-tuning the effect of pregnancy for sustainable alpaca farming. |
| format | info:ar-repo/semantics/artículo |
| id | INTA22670 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA226702025-07-30T12:28:53Z Ingestive behaviour, performance, and methane emissions of pregnant alpacas grazing cultivated pastures in the high Peruvian Andes Gualdron-Duarte, Laura Bibiana Loza, Cecilia Gere, José Ignacio Huanca Marca, Nancy Franco, Francisco Sanca Uscamayta, Yemi García Ticllacuri, Ruben Orellana Ligas, Guadalupe López, Diannett Benito Rivera Pachiño, Feliciano Moscoso Muñoz, Juan Díaz Céspedes, Medardo Collazos Paucar, Lizbeth Pinares Patiño, César Vélez Marroquín, Víctor Cabezas García, Edward Camélidos Alpaca Pastoreo Rotacional Emisión de Metano Región Andina Perú Camelids Rotational Grazing Methane Emission Andean Region This study compares grazing patterns, animal performance, and enteric methane emissions (CH4) of female alpacas (Huacaya and Suri) at two periods of their late pregnancy. Animals were rotationally grazed on a mixed sward at high Peruvian Andes conditions. This study involved two experimental periods (P1 and P2), each lasting 26 days. P1 took place in November 2021, corresponding to the end of dry season (‘Transition period’), whereas P2 was conducted in January 2022, with this coinciding with the beginning of rainy season (‘Wet period’). Forage selectivity was measured using hand plucking of forage harvested, whereas grazing behaviour was recorded by visual observation. Dry matter intake (DMI) was estimated from total faecal collection and in vitro forage digestibility. Fleece characteristics were measured following standard procedures adopted by the local industry. The sulphur hexafluoride (SF6) gas-tracer technique was used to estimate CH4 emissions. Data were analysed by a repeated measures model including both alpaca variety and period as fixed effects, whereas alpaca within variety was considered as random. No differences were detected among alpaca varieties either in terms of forage selectivity, grazing behaviour (except for biting rate) or feed intake. Regardless of period, grasses were the main dietary components (≥ 78 %). The proportion of leaves consumed lowered from 84 to 70% and presence of both legumes and herbs increased during P2. Increased nutritional requirements prior to parturition in conjunction with reduced forage quality and DMI (P = 0.004) during P2 led to negative energy and protein balances. This was aligned with increases in fibre growth and diameter, prior to parturition (P ≤ 0.035). Suri displayed faster fibre growth than Huacaya (P = 0.005). Although Huacaya females tended to emit more enteric CH4 per unit of metabolic live weight than Suri (P = 0.056), this was not reflected either on variety differences in emissions per unit of intake or fleece produced. On average, CH4 intensity decreased from 0.805 (P1) to 0.530 g/kg clean fleece at P2 (P = 0.032). Results are valuable towards fine-tuning the effect of pregnancy for sustainable alpaca farming. EEA Balcarce Fil: Gualdrón Duarte, Laura Bibiana. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: Gualdrón Duarte, Laura Bibiana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Loza, Cecilia. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: Loza, Cecilia. Universidad de la República. Facultad de Agronomía; Uruguay Fil. Gere, José I. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: Gere, José I. Universidad Tecnológica Nacional; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina Fil: Huanca Marca, Nancy. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: Huanca Marca, Nancy. Universidad de Zaragoza. Departamento de Producción Animal y Ciencia de los Alimentos; Argentina Fil: Franco, Francisco E. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: Sanca Uscamayta, Yemi. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: García Ticllacuri, Rubén. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: García Ticllacuri, Rubén. Universidad Nacional de Huancavelica. Facultad de Ciencias Agrarias; Perú Fil: Orellana Ligas, Guadalupe. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: López, Diannett Benito. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: López, Diannett Benito. Universidad Nacional del Altiplano. Facultad de Medicina Veterinaria y Zootecnia; Perú Fil: Rivera Pachiño, Feliciano. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: Moscoso Muñoz, Juan. Universidad Nacional San Antonio Abad del Cusco. Facultad de Ciencias Agrarias; Perú Fil: Díaz Céspedes, Medardo. Universidad Nacional Agraria de La Selva. Facultad de Zootecnia; Perú Fil: Collazos Paucar, Lizbeth. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: Collazos Paucar, Lizbeth. Universidad Nacional Autónoma de Alto Amazonas. Facultad de Ingeniería, Universidad Nacional Autónoma de Alto Amazonas; Perú Fil: Pinares Patiño, César. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: Vélez Marroquín, Víctor. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: Cabezas García, Edward. Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria; Perú Fil: Cabezas García, Edward. International Livestock Research Institute; Kenia 2025-06-13T09:42:35Z 2025-06-13T09:42:35Z 2025-04 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/22670 https://www.sciencedirect.com/science/article/pii/S1871141325000289 1871-1413 (Print) 1878-0490 (Online) https://doi.org/10.1016/j.livsci.2025.105665 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Elsevier Livestock Science 294 : 105665 (April 2025) |
| spellingShingle | Camélidos Alpaca Pastoreo Rotacional Emisión de Metano Región Andina Perú Camelids Rotational Grazing Methane Emission Andean Region Gualdron-Duarte, Laura Bibiana Loza, Cecilia Gere, José Ignacio Huanca Marca, Nancy Franco, Francisco Sanca Uscamayta, Yemi García Ticllacuri, Ruben Orellana Ligas, Guadalupe López, Diannett Benito Rivera Pachiño, Feliciano Moscoso Muñoz, Juan Díaz Céspedes, Medardo Collazos Paucar, Lizbeth Pinares Patiño, César Vélez Marroquín, Víctor Cabezas García, Edward Ingestive behaviour, performance, and methane emissions of pregnant alpacas grazing cultivated pastures in the high Peruvian Andes |
| title | Ingestive behaviour, performance, and methane emissions of pregnant alpacas grazing cultivated pastures in the high Peruvian Andes |
| title_full | Ingestive behaviour, performance, and methane emissions of pregnant alpacas grazing cultivated pastures in the high Peruvian Andes |
| title_fullStr | Ingestive behaviour, performance, and methane emissions of pregnant alpacas grazing cultivated pastures in the high Peruvian Andes |
| title_full_unstemmed | Ingestive behaviour, performance, and methane emissions of pregnant alpacas grazing cultivated pastures in the high Peruvian Andes |
| title_short | Ingestive behaviour, performance, and methane emissions of pregnant alpacas grazing cultivated pastures in the high Peruvian Andes |
| title_sort | ingestive behaviour performance and methane emissions of pregnant alpacas grazing cultivated pastures in the high peruvian andes |
| topic | Camélidos Alpaca Pastoreo Rotacional Emisión de Metano Región Andina Perú Camelids Rotational Grazing Methane Emission Andean Region |
| url | http://hdl.handle.net/20.500.12123/22670 https://www.sciencedirect.com/science/article/pii/S1871141325000289 https://doi.org/10.1016/j.livsci.2025.105665 |
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