&lt;b&gt;Effect of concentrate supplementation and time scales of evaluation on behavioral and physiological responses of pregnant ewes on grazing system

Silva, Tairon Pannunzio Dias e; Marques, Carlo Aldrovandi Torreão; Torreão, Jacira Neves da Costa; Bezerra, Leílson Rocha; Araújo, Marcos Jácome de; Lima, Lucas Almeida

doi:10.4025/actascianimsci.v38i1.28748

Cited by 10 publications

(3 citation statements)

References 34 publications

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“…Behavioral understanding is essential for the performance enhancement of sheep on grazing, mainly due to intense climate changes which influence animal physiology. However, it is important to enhance the utilization of pastures *Corresponding author, E-mail: dr.anaamomar85@gmail.com, madamreda72@yahoo.com Anaam E. Omar 1 *, Heba S. Gharib 2 , Enas N. Said 2 and applying strategies for nutritional management achieving the system highly productive (3).A study in India by (4) also reported significant effect of raising lambs on ADG under intensive system where lambs feed on complete rations compared with extensive system.…”

Section: Introductionmentioning

confidence: 99%

Effect of Feeding Different Concentrate Roughage Ratio on Growth, Reproductive Performance and Behavior of Sheep

Omar¹,

Gharib²,

Said³

2019

SVR

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The goal of this study was to examine the influence of feeding different concentrate roughage ratios on growth, reproductive parameters and behavior of sheep. The study design involved the use of a 30 sexually mature ewes assigned to three groups consisting of three ratios of concentrate (C) to roughage (R), Group1. 80%C: 20%R, Group2. 70%C: 30%R and Group3. 60%C: 40%R. The variables of the studies were live weight changes and Body condition score (BCS) of ewes during pregnancy and postpartum till weaning and behavior of ewes in addition to the birth weight and average daily gain of neonatal lambs and subsequent changes till weaning. The conception rate of ewes and their overall reproductive performance are under investigation. The results reveled that, different ratios of concentrate and roughage feeding had no significant effect on body weight, BCS and average dry matter intake of ewes during pregnancy and postpartum till weaning. Lambs birth weight and subsequent weights till weaning and average daily gain were significantly (P≤0.05) increased by feeding on ration contain 80%C: 20% R, followed by those feeding on 70% C: 30% R and lowest in those feeding on 60% C: 40%R. Rumination was significantly increased in Group3 lambs than other groups. Higher concentrate ratios had positive effect on reproductive performance of ewes and body weight, daily body weight gain and neonatal behavior of lambs till weaning.

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Section: Introductionmentioning

confidence: 99%

Effect of Feeding Different Concentrate Roughage Ratio on Growth, Reproductive Performance and Behavior of Sheep

Omar¹,

Gharib²,

Said³

2019

SVR

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“…Changes in the activity of rumination and other behavioral activities can occur with grazing times of more than 12-13 h day -1 . The main factors that influence dry matter intake in ruminants are related to the animal (breed, sex, genotype, body weight, growth, age, lactation stage, pregnancy, last feed, and body condition), feed (plant species, diet composition, chemical composition, digestibility, degradation levels, pass rate, conservation quality, dry matter content, quality, fermentation rate, acceptability, and fat content), management and environment (feed access time, frequency of grazing, anabolic agents, feed additives, minerals, availability, photoperiod, temperature, and humidity) (Silva et al, 2016).…”

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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“…This situation impairs the performance of animals due to failing to meet their nutritional needs, especially during pregnancy and lactation, which are increased to support fetal development and milk production (NRC, ). Thus, practices such as supplementation can adjust the supply requirements for animals during these physiological conditions and can promote their best growth performance, which is reflected in the performance of offspring (Silva et al., , ). In addition, it is important to have knowledge about the nutritive value of the diet with an evaluation based on intake and feed digestibility.…”

Section: Introductionmentioning

confidence: 99%

Internal markers for predicting dry matter intake and digestibility in Santa Inês ewes on a pasture

et al. 2018

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Assessing feed intake is a valuable tool for herd management decisions. The use of markers is one of the most widely used techniques for estimating dry matter intake (DMI) in ruminants. Thus, internal markers (IM) were evaluated to predict DMI and digestibility (DMD) in ewes supplemented on a pasture during pre‐ (75, 105 and 135 days of gestation) and postpartum periods (30 and 60 days of lactation). The animals were kept on a pasture, and they were put into individual stalls to receive their supplementation. Twelve ewes were distributed in a completely randomized design: (a) Two supplementation levels (SL; 5 and 15 g/kg body weight, BW) and three IM (indigestible neutral detergent fiber, iNDF; indigestible acid detergent fiber, iADF; and rumen‐undegradable dry matter; RUDM) were used and analyzed as mixed models. (b) The DMI and DMD, which were estimated by the best marker, were analyzed as repeated measures using the mixed procedure in SAS. Fecal output was estimated using an external marker (LIPE®; isolated, purified and enriched lignin). The DMI and DMD estimated by RUDM were greater and better than iADF and iNDF, which were similar. The effects of SL and physiological stages for DMI and DMD were evaluated by the values obtained from RUDM. As expected, regardless of the physiological stage, DMI and DMD were greater in the animals that received 15 g/kg BW. Considering the physiological stage, the animals fed 15 g/kg BW had greater DMI and DMD at 75 days of gestation and 30 days of lactation and the least DMI was observed at 135 days of gestation and 60 days of lactation. In conclusion, RUDM provides the best estimates for DMI and DMD, which were greater in animals receiving 15 g/kg BW of concentrate at the beginning of gestation and lactation.

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<b>Effect of concentrate supplementation and time scales of evaluation on behavioral and physiological responses of pregnant ewes on grazing system

Cited by 10 publications

References 34 publications

Effect of Feeding Different Concentrate Roughage Ratio on Growth, Reproductive Performance and Behavior of Sheep

Effect of Feeding Different Concentrate Roughage Ratio on Growth, Reproductive Performance and Behavior of Sheep

Sheep and goat feeding behavior profile in grazing systems

Internal markers for predicting dry matter intake and digestibility in Santa Inês ewes on a pasture

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