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: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2025
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/179345 |
| _version_ | 1855542153888923648 |
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| author | Gualdrón-Duarte, L.B. Loza, C. Gere, J.I. Huanca-Marca, N. Franco, Francisco E. Sanca Uscamayta, Y. García-Ticllacuri, R. Orellana Ligas, G. Benito López, D. Rivera Pachiño, F. Moscoso-Muñoz, Juan E. Díaz-Céspedes, Medardo A. Collazos Paucar, Lizbeth L. Pinares-Patiño, César S. Vélez-Marroquín, Víctor M. Garcia, Edward |
| author_browse | Benito López, D. Collazos Paucar, Lizbeth L. Díaz-Céspedes, Medardo A. Franco, Francisco E. Garcia, Edward García-Ticllacuri, R. Gere, J.I. Gualdrón-Duarte, L.B. Huanca-Marca, N. Loza, C. Moscoso-Muñoz, Juan E. Orellana Ligas, G. Pinares-Patiño, César S. Rivera Pachiño, F. Sanca Uscamayta, Y. Vélez-Marroquín, Víctor M. |
| author_facet | Gualdrón-Duarte, L.B. Loza, C. Gere, J.I. Huanca-Marca, N. Franco, Francisco E. Sanca Uscamayta, Y. García-Ticllacuri, R. Orellana Ligas, G. Benito López, D. Rivera Pachiño, F. Moscoso-Muñoz, Juan E. Díaz-Céspedes, Medardo A. Collazos Paucar, Lizbeth L. Pinares-Patiño, César S. Vélez-Marroquín, Víctor M. Garcia, Edward |
| author_sort | Gualdrón-Duarte, L.B. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| 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 | Journal Article |
| id | CGSpace179345 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1793452026-01-23T13:46:01Z Ingestive behaviour, performance, and methane emissions of pregnant alpacas grazing cultivated pastures in the high Peruvian Andes. Gualdrón-Duarte, L.B. Loza, C. Gere, J.I. Huanca-Marca, N. Franco, Francisco E. Sanca Uscamayta, Y. García-Ticllacuri, R. Orellana Ligas, G. Benito López, D. Rivera Pachiño, F. Moscoso-Muñoz, Juan E. Díaz-Céspedes, Medardo A. Collazos Paucar, Lizbeth L. Pinares-Patiño, César S. Vélez-Marroquín, Víctor M. Garcia, Edward forage feed quality methane emission grazing camelids 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. 2025-04-01 2026-01-01T11:16:42Z 2026-01-01T11:16:42Z Journal Article https://hdl.handle.net/10568/179345 en Open Access Elsevier Gualdrón-Duarte, L.B., Loza, C., Gere, J.I., Huanca-Marca, N.F., Franco, F.E., Uscamayta, Y.S., García-Ticllacuri, R., Orellana Ligas, G., Benito López, D., Rivera Pachiño, F., Moscoso-Muñoz, J.E., Díaz-Céspedes, M.A., Collazos Paucar, L.L., Pinares-Patiño, C.S., Vélez-Marroquín, V.M. and Cabezas-Garcia, E.H. 2025. Ingestive behaviour, performance, and methane emissions of pregnant alpacas grazing cultivated pastures in the high Peruvian Andes. Livestock Science 294:105665. |
| spellingShingle | forage feed quality methane emission grazing camelids Gualdrón-Duarte, L.B. Loza, C. Gere, J.I. Huanca-Marca, N. Franco, Francisco E. Sanca Uscamayta, Y. García-Ticllacuri, R. Orellana Ligas, G. Benito López, D. Rivera Pachiño, F. Moscoso-Muñoz, Juan E. Díaz-Céspedes, Medardo A. Collazos Paucar, Lizbeth L. Pinares-Patiño, César S. Vélez-Marroquín, Víctor M. Garcia, 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 | forage feed quality methane emission grazing camelids |
| url | https://hdl.handle.net/10568/179345 |
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