Intake and Selection of Goats Grazing Heterogeneous Vegetation: Effect of Gastrointestinal Nematodes and Condensed Tannins
| Autor: | J. Ventura-Cordero, Rafael Arturo Torres-Fajardo, José Israel Chan-Pérez, Jorge Navarro-Alberto, Juan Felipe de Jesús Torres-Acosta, P.G. González-Pech, Carlos A. Sandoval-Castro |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
chemistry.chemical_classification Ecology 04 agricultural and veterinary sciences Polyethylene glycol Management Monitoring Policy and Law Biology 01 natural sciences Moxidectin 010601 ecology chemistry.chemical_compound Animal science Deciduous chemistry Proanthocyanidin parasitic diseases Grazing PEG ratio 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Criollo tobacco Animal Science and Zoology Condensed tannin Nature and Landscape Conservation |
| Zdroj: | Rangeland Ecology & Management. 72:946-953 |
| ISSN: | 1550-7424 |
| DOI: | 10.1016/j.rama.2019.08.002 |
| Popis: | Feeding behavior is a multifactorial process with pivotal relevance for the maintenance and survival of ruminants. This study evaluated the effect of gastrointestinal nematodes (GIN), condensed tannin (CT) content of plants, and their possible interaction on the intake and selection of feed resources by Criollo goats in a heterogeneous vegetation. An 8-wk field experiment was conducted in the tropical deciduous forest (TDF) during the rainy season with adult Criollo goats (35.1 ± 6.7 kg body weight [BW]). Goats were assigned to four groups (n = 6): 1) MOX: suppressive treatment with moxidectin (Cydectin 0.4 mg/kg BW subcutaneous every 4 wk), 2) INF: with natural GIN infection, 3) MOX + PEG: treated with moxidectin and dosed with a CT-neutralizing agent (50 g of polyethylene glycol [PEG] diluted in 50 mL of water, per os), and 4) INF + PEG: with natural GIN infection and PEG dosage. Intake was measured using a direct observation method in a 2.2-ha TDF plot. Plant availability was obtained from 30 exclusion quadrants (2 × 2 m). Selection was estimated with the Cheeson index using the ratio of consumed plants and their availability by grouping plant species as shrubs and herbs (with high CT [> 10%], medium CT [> 3% to |
| Databáze: | OpenAIRE |
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