Padrões de comportamento ingestivo de cordeiras recebendo ou não suplemento em pastagem de milheto

Confortin, Anna Carolina Cerato; Bremm, Carolina; Rocha, Marta Gomes da; Silva, José Henrique Souza da; Elejalde, Denise Adelaide Gomes; Camargo, Daniele Gindri; Rosa, Alexandre Pires

doi:10.1590/s0103-84782010005000194

Cited by 6 publications

(4 citation statements)

References 13 publications

(8 reference statements)

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“…Since concentrate supplementation was expected to reflect directly on forage intake owing to the substitution effect, the sheep receiving the low level of supplementation showed a greater grazing intensity in this study. These results disagree with those of Confortin et al (2010) in a study in which ewes were supplemented. They reported a reduction in diurnal grazing time and increased time devoted to other activities, although patterns of intake, displacement and demand were unchanged.…”

Section: Resultscontrasting

confidence: 99%

“…In the current research no significant (P <0.05) interacting effects were found between breed x supplementation level, breed x period and breed x supplementation level x period in ingestive behaviour. Confortin et al (2010) reported that patterns of animal feeding behaviour under diets supplemented or unsupplemented depend on the structural characteristics of the pasture to which they are subjected throughout the grazing period. Therefore, grazing time was not affected (P >0.05) by supplementation (Table 3).…”

Section: Resultsmentioning

confidence: 99%

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Ingestive Behaviour of Grazing Ewes Given Two Levels of Concentrate

Silva¹,

Marques²,

Torreão³

et al. 2015

SA J. An. Sci.

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This study aimed to evaluate the influence of concentrate supplementation on the ingestive behaviour of grazing ewes. Twelve pregnant pluriparous sheep were used, six of the Santa Inês breed and six of the Morada Nova breed. The supplement was formulated to supply the animals with two feed levels (0.5% and 1.5% of body weight) of nutrition. The experimental design was a randomized 2 x 2 x 2 factorial arrangement (two breeds, two supplementation levels and two feeding shifts, morning and afternoon) with six replicates per treatment, totalling 24 experimental units. Focal sampling was used to record the time spent on the adopted behaviour at 10-minute intervals for 10 continuous hours, with three replications, totalling 180 records per animal. Sampling started at 07:00. Time spent grazing, ruminating and resting did not correlate with the level of concentrate supplementation. It was expected that concentrate supplementation would reflect directly on forage intake owing to the substitution effect, which causes sheep where the supplement supplied a small proportion of net energy requirement, to have a greater grazing intensity. The two breeds differed in the time spent ruminating or lying, with the Santa Inês sheep spending more time in these activities. Greater intensity of grazing and ruminating occurred in the morning, which is directly related to the climatic conditions of the region. Time of day is a factor that imposes limitations on the feeding behaviour patterns of ewes that are supplemented on pasture.

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Section: Resultscontrasting

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Ingestive Behaviour of Grazing Ewes Given Two Levels of Concentrate

Silva¹,

Marques²,

Torreão³

et al. 2015

SA J. An. Sci.

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show abstract

“…However, there was no change in the grazing patterns of sheep, possibly owing to an excess of rumen-degradable protein in the supplement, and therefore they used the pasture to compensate for the excess protein and maintain a good protein:fermentable carbohydrate ratio for homeostasis in the rumen (Silva et al, 2015). In contrast, Confortin et al (2010) reported a reduction in diurnal grazing time and an increased amount of time devoted to other activities; however, patterns of intake, displacement, and demand were unchanged.…”

Section: Time Spent Grazingmentioning

confidence: 99%

Sheep and goat feeding behavior profile in grazing systems

Silva

Filho

2020

Acta Sci. Anim. Sci.

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Feeding behavior analysis provides information about the relationships between animals and pastures. Therefore, this review aims to describe some aspects of the feeding behavior profiles of both sheep and goats in grazing systems. The structure of the pasture is a key factor in the feeding behavior of grazing animals. The amount of feed consumed in a given period of time is affected by the number of meals, duration and velocity of swallowing, changes in grazing time, bite rate, bite weight, and quality of ingested forage. The different phenological stages of forage also influence the animals’ strategies to optimize their intake, which consequently changes their behavioral activities. Sheep and goats tend to be more selective than cattle, and young animals are more selective than older animals; this selectivity characteristic is one of the most important aspects to be observed in pasture management. According to the degree of selectivity, the animals will intake forages of higher or lower nutritive quality. In addition, the intensity and distribution of their daily activities (grazing, ruminating, and resting) are influenced by several factors, such as the availability and nutritive value of the pasture, its management, the animal activity in the group, and the predominant climatic conditions of the region.

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“…The study of the ingestive behavior has been used as a tool to evaluate diets that allows for the adjustment of the animal-feeding management in order to achieve better performance (Confortin et al, 2010;Pereira et al, 2011;Pinheiro et al, 2011;Santana Júnior et al, 2013b), guiding and reinforcing various discussions about intake. Thus, these associations are cited as hypotheses rather than the objective of research, and so the measurements of these correlations may break some paradigms, because probably not all behavioral variables are correlated with productive results (Santana Júnior et al, 2013a).…”

Section: Introductionmentioning

confidence: 99%

Linear correlations between feed intake and ingestive behavior of feedlot lambs

et al. 2019

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The objective of this study was to evaluate linear correlations between feed intake and ingestive behavior of feedlot lambs. Were used ten castrated male Santa Inês sheep with a body weight of 20 ± 4.38 kg, at four months of age. The experiment lasted 50 days, with five 10-d periods, in which an evaluation of feed intake and ingestive behavior was undertaken per period, totaling 50 replicates. The diet was composed of concentrate ingredients only. The analyses were performed by Pearson’s linear correlations and the t test, and means were considered significant when P≤0.05. Intake showed positive correlations (P≤0.05) with the times spent feeding and ruminating and total chewing time, and a negative correlation (P≤0.05) with other activities. Positive correlations were found between the number of feeding periods, number of other activities and the time per rumination period with intake (P≤0.05). A negative correlation was found between the feed efficiency of dry matter and the intake, as well as the other nutrients (P≤0.05). The behavioral characteristics related to feed intake appear to be correlated, which allows for inferences through the study of these variables. The activities related to nutrient intake, with respect to time and efficiency, can be expressed directly through the animal behavior.

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Padrões de comportamento ingestivo de cordeiras recebendo ou não suplemento em pastagem de milheto

Cited by 6 publications

References 13 publications

Ingestive Behaviour of Grazing Ewes Given Two Levels of Concentrate

Ingestive Behaviour of Grazing Ewes Given Two Levels of Concentrate

Sheep and goat feeding behavior profile in grazing systems

Linear correlations between feed intake and ingestive behavior of feedlot lambs

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