Comportamento ingestivo de cordeiros em três sistemas de produção em pastagem de Tifton 85

Poli, César Henrique Espírito Candal; Monteiro, Alda Lúcia Gomes; Barros, Carina Simionato de; Dittrich, João Ricardo; Fernandes, Sérgio Rodrigo; Carvalho, Paulo César de Faccio

doi:10.4025/actascianimsci.v31i3.6014

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…In studies with sheep on bermudagrass pasture, Poli et al (40) found that grazing was the activity that took up most of the lambs' time in the three production systems (lambs weaned on pasture; unweaned lambs exclusively on pasture; and unweaned lambs supplemented on pasture), consistent with results from the present study.…”

Section: Behavior Throughout the Daysupporting

confidence: 90%

Ingestive Behavior of Young Lambs on Contrasting Tropical Grass Sward Heights

et al. 2020

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The efficiency of grazing ruminant production systems is directly associated to the animals' ingestive behavior, and to structural characteristics of the pastures. The objective of this study was to evaluate the ingestive behavior of young lambs grazing three different heights of Capim Aruana (Panicum maximum). The experiment was carried out in two consecutive years, in which 30 tester lambs (4-5 months old) were equally divided into three paddocks (treatments) corresponding to different average sward heights of Aruana grass: (1) Tall-75 cm; (2) Medium-50 cm; and (3) Short-25 cm in a randomized block design. Ingestive behavior assessments were carried out every 28 days through 10-min observations of the main activities of the animals (grazing, ruminating, idling) and biting rate, from sunrise to sunset. In addition, the productive and qualitative characteristics of the pastures were assessed. Despite differences in pasture structure, grazing time (GT) and idling time were similar among treatments (P = 0.4266 and P = 0.2939, respectively). The shortest ruminating time (RT, P = 0.0181) was recorded in the treatment of lowest sward height. Lambs grazing on this treatment also showed 23% more bites per minute (P= < 0.0001) than animals in the Tall and Medium treatments. A Decision Tree analysis was performed for GT, identifying in a hierarchical order that the initial weight of the animals and sward height explained 62% (R 2 = 0.621) of the variation, representing the variables with the greatest influence on GT. Initial body weight explained 48% of the model. Thus, our research shows that the different sward heights of Capim Aruana mainly alter the lamb's RT and biting rate, and that the animals' initial body weight is a key factor influencing GT, given that this variable makes lambs more susceptible to changes in sward height.

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Section: Behavior Throughout the Daysupporting

confidence: 90%

Ingestive Behavior of Young Lambs on Contrasting Tropical Grass Sward Heights

et al. 2020

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“…The time for rumination is related to the nature of the diet, being proportional to the cell wall content of the bulky ones. Thus, the higher the fiber content in the diet, the longer the time spent in rumination (Van Soest, 1994, Poli et al 2009.…”

Section: Ingestive Behaviormentioning

confidence: 99%

Performance, Ingestive Behavior and Gastrointestinal Helminths Control of Suckling Lambs Supplemented in Creep-Fed and Not Supplemented in Tropical Pastures

Melo¹,

Ítavo²,

Ítavo³

et al. 2019

JAS

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The objective of this study was to evaluate the performance, ingestive behavior and gastrointestinal helminths control of suckling lambs raised on pastures of Brachiaria ssp. supplemented in creep-fed and not supplemented. Thirty-one lambs being 15 lambs in the control treatment (without supplementation) and 16 lambs in the creep feeding treatment (with protein-energetic supplementation) were evaluated. Performance of lambs supplemented was superior to lambs no-supplemented. Lambs without supplemented had weaning age of 81 days and an average gain of 194 grams. Lambs supplemented showed weaning age of 58 days and average daily gain of 268 grams. eggs per gram of stool (EPG) count in the control treatment was 4553, while in the creep feeding treatment the mean was 763. The morbidity rate caused by gastrointestinal helminths in the control treatment was 6.6% and there was no morbidity due to helminths in the treatment creep feeding. The morbidity rate due to hepatogenic intoxication was 46.6% in control and 12.5% in the lambs supplemented. The ingestion of protein-energy supplementation in creep feeding promoted an increase in productive performance of lambs, as well as increased resistance and tolerance to gastrointestinal infections and decreased cases of hepatogenic intoxication by ingestion of Brachiaria spp.

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“…Despite this, the production of lambs on pastures with high productivity is challenging and some studies indicate unsatisfactory performance of the animals, below 100 g/day [14–16]. The productivity of lambs on pasture is attributed to their ability to harvest nutrients efficiently and effectively from the pasture [17], and the understanding of ingestive behavior is an important tool for directing management practices to obtain better animal performance. Therefore, before making adjustments to tropical pasture management to improve animal performance, it is essential to understand the dynamics of ingestive behavior of these animals.…”

Section: Introductionmentioning

confidence: 99%

Influence of tropical pastures on grazing behavior parameters of young lambs

Poli

Hampel

et al. 2020

Preprint

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Tropical sward characteristics can alter lamb ingestive behavior. Our study evaluated the ingestive behavior of young lambs in different tropical pastures to identify which variables interfere in their grazing activity. Two years of study were carried out with 54 weaned lambs distributed in three different swards: 1) monoculture of a upright grass, guinea grass (Panicum maximum; GG); 2) monoculture of a shrubby legume pigeon pea (Cajanus cajan; PP) and 3) contiguous areas with half the paddock with GG and half with PP (GP). The experiment was set out in a randomized complete block design. Lamb ingestive behavior was observed from sunrise to sunset with records every 5 minutes. To identify the main variables that affected with the lamb grazing activity, a multivariate analysis of the Decision Tree was performed. Our results showed that there was no difference in the ingestive behavior parameters of young lambs in different swards (P > 0.05). There was interaction among the swards and the experimental periods for the variables idleness time and biting rate (P ≤ 0.05). Grazing time of the animals increased 40% with experimental period progression. The Decision Tree identified leaf:stem ratio as the variable that most influenced lamb grazing time in GG and GP swards while in the PP sward grazing time was directly related to the pasture height. The behavior of young lambs on tropical pasture is variable as there is a change in the behavioral response over time. In addition, the grazing time of these animals can be estimated by means of variables related to pasture structural characteristics (leaf:stem ratio and height) together with chemical variables.

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Comportamento ingestivo de cordeiros em três sistemas de produção em pastagem de Tifton 85

Cited by 5 publications

References 3 publications

Ingestive Behavior of Young Lambs on Contrasting Tropical Grass Sward Heights

Ingestive Behavior of Young Lambs on Contrasting Tropical Grass Sward Heights

Performance, Ingestive Behavior and Gastrointestinal Helminths Control of Suckling Lambs Supplemented in Creep-Fed and Not Supplemented in Tropical Pastures

Influence of tropical pastures on grazing behavior parameters of young lambs

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