&lt;b&gt;Ewe maternal behavior score to estimate lamb survival and performance during lactation

Moraes, Andréia Barros de; Poli, César Henrique Espírito Candal; Fischer, Vívian; Fajardo, Neuza Maria Campos; Aita, Marta Farias; Porciúncula, Gabriela Caillava Da

doi:10.4025/actascianimsci.v38i3.29923

Cited by 13 publications

(8 citation statements)

References 32 publications

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“…The time taken for the lamb to stand was, on average, 16.42 minutes, which was better than the results obtained by Queiroz (2018), who observed an average of 78.77 minutes for Santa Inês lambs to stand. The results obtained by Dwyer (2003) demonstrated that the time taken by Scottish Blackface and Suffolk lambs to stand after calving was on average 30 minutes, which is similar to the results described by Moraes et al (2016), who observed an average time of 26.13 minutes for Corriedale lambs. Table 5 Values in minutes (min) of time taken by lamb to stand after birth, time from birth to first suckling, time from birth to placental release in sheep, standard deviation and overall mean of lambs for ewes that received supplementation with or without fat protected in gestation No difference (P>0.05) was observed from birth to first feeding.…”

Section: Resultssupporting

confidence: 84%

Performance and maternal-offspring behavior of ewes fed protected fat from palm oil

Santos

Negri

Maeda

et al. 2020

SCA

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This study aimed to evaluate the performance and maternal-offspring behavior of ewes fed protected fat from palm oil. Forty multiparous ewes with an average age of three years were divided into two treatments, with or without protected fat supplementation (in concentrate). Every 15 days and at the time of lambing, weighing and body condition evaluation of sheep were performed, while lambs were evaluated at birth until weaning. Duration of post-weaning anestrus was obtained through the manifestation of estrus, detected by a vasectomized male. Data were submitted to analysis of variance. No difference was observed between supplementations for body weight, body condition score, and average daily gain during the gestation phase. Ewes fed protected fat had a superiority regarding the body score during the lactation phase. Lambs from ewes supplemented with protected fat were weaned faster, and ewes presented an early estrus. No difference was observed between treatments for maternal-offspring behavior. The use of fat during lactation showed improvement in productive (body condition score) and reproductive (shorter anestrus period) parameters. It also reduces the weaning age of lambs and does not alter maternal-offspring behavior.

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Section: Resultssupporting

confidence: 84%

Performance and maternal-offspring behavior of ewes fed protected fat from palm oil

Santos

Negri

Maeda

et al. 2020

SCA

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“…A strong ewe-lamb bond is essential for lamb survival, and maternal behavior is an important factor affecting lamb survival (Dwyer, 2014). The maternal behavior score, a 5-point scale assessment of maternal response to handling and tagging of her lambs (O'Connor et al, 1985), has been used to estimate lamb survival and performance (Everett-Hincks et al, 2005;de Moraes et al, 2016). Our results show that it is possible to identify ewes that maintain close proximity to their lambs, under field conditions without human interference, by BT technology.…”

Section: Discussionmentioning

confidence: 99%

Determination of maternal pedigree and ewe–lamb spatial relationships by application of Bluetooth technology in extensive farming systems

Sohi

Trompf

Marriott

et al. 2017

Journal of Animal Science

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The objectives of this study were to validate the application of Bluetooth technology to determine maternal pedigree and to determine ewe-lamb spatial relationships in extensive farming systems. A total of 35 first-cross Merino ewes (Merino × Border Leicester and East Friesian) and 23 of their lambs aged 1 to 3 wk were fitted with activity monitors equipped with Bluetooth (BT) technology (ActiGraph wGT3X-BT) by means of halters and collars, respectively. The BT devices on lambs were programmed to receive wireless signals once every minute from nearby BT units on ewes, which were programmed as beacons sending BT signals 4 times every second. Ewes and lambs fitted with sensors were dispatched into the paddocks, and after 10 d, the sensor units were retrieved and the BT signals received by lambs were downloaded using the ActiGraph software. The maternal pedigree of the lambs was determined as the ewe from which the lamb received the most BT signals. The distance between the lamb receiving the signal and the ewe sending the signal was estimated from the strength of BT signal received. The pedigree determined by BT was compared with the pedigree determined by DNA profiling and verification. The results showed that the accuracy of maternal pedigree determined by BT signals reached 100% within the first 15 min of returning animals to pasture of ewes and lambs fitted with sensors. Maternal signals (counts/d) received by 1-, 2-, and 3-wk-old lambs were 617 ± 102, 603 ± 54, and 498 ± 36, respectively, and the corresponding nonmaternal signals received were 140 ± 27, 106 ± 30, and 155 ± 39, respectively. Maternal signals received during the dark period were significantly higher than the maternal signals received during the light period ( < 0.05). Maternal signals received during the light period by 3-wk-old lambs were significantly lower when compared with those received by 1- and 2-wk-old lambs. Over 90% of the BT signals received from within 2 m of the lamb were from its mother. The maternal BT signals expressed as a portion of total BT signals decreased with increasing distance from the lamb. The results show that BT wireless networking is a fast and reliable method for the determination of maternal pedigree of lambs in extensive farming systems. In addition, wireless BT technology is also useful in determining mother-offspring spatial relationships.

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“…Lamb survival is influenced not only by the environment but also by ewe and lamb factors. The key ewe and lamb factors affecting lamb survival have been summarized by previous detailed reports (Sawalha et al, 2007;Dwyer, 2008a;Brien et al, 2014;Simitzis et al, 2016;Moraes et al, 2016). Maternal behavior affects lamb survival and vigor during the neonatal period.…”

Section: Lamb Survivalmentioning

confidence: 99%

The Expression of Maternal Behavior in Chinese Hu Sheep and its Effects on Lamb Survival and Body Weight

Geng

Lan-ping

2020

IJAR

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Background: The difference in the maternal behavior expression of sheep can affect the early growth and development as well as the survival of lambs. The characteristics of maternal behavior in primiparous and multiparous ewes were observed to reveal the expression of maternal behavior in Chinese Hu sheep and its effects on early lamb survival and body weight.Methods: In total 527 pregnant ewes with delivery were selected, including 246 primiparous ewes and 281 multiparous ewes. The observation record of maternal behavior began from 10 days before delivery to 3 days after delivery by video recording. The behaviors of ewe to the lamb included licking, suckling, seeking lambs, denial of suckling after delivery, butting and trampling lambs, abandoning lambs, and stealing lambs. Body weight of lambs were recorded including newborn, 7-day-old, 14-day-old and 35-day-old (weaning).Result: There were significant differences in the incidence rate in lamb abandonment and stealing between primiparous and multiparous ewes (P less than 0.05), namely the primiparous ewe group had the higher incidence of undesirable behaviours. However, there were no significant differences in seeking, licking and trampling behaviors between two groups (P greater than 0.05). Lamb survival within 7 days after delivery of multiparous ewes was greater than primiparous ewes (P less than 0.05). The body weights of newborn and 7-day-old lambs in the multiparous ewe group were significantly higher than the primiparous group (P less than 0.05). This study demonstrates that limited significant differences exist between primiparous and multiparous ewes in several aspects of maternal behavior in Chinese Hu sheep. Ewe behavioral expression associated with the birth and care of the neonatal lambs are essential for the survival and growth of the offspring.

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<b>Ewe maternal behavior score to estimate lamb survival and performance during lactation

Cited by 13 publications

References 32 publications

Performance and maternal-offspring behavior of ewes fed protected fat from palm oil

Performance and maternal-offspring behavior of ewes fed protected fat from palm oil

Determination of maternal pedigree and ewe–lamb spatial relationships by application of Bluetooth technology in extensive farming systems

The Expression of Maternal Behavior in Chinese Hu Sheep and its Effects on Lamb Survival and Body Weight

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