A note on effect of exercise on behaviour and performance of confined swine

Morrison, Steven; Hintz, H. F.; Givens, R. L.

doi:10.1017/s0003356100026350

Cited by 13 publications

(5 citation statements)

References 3 publications

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“…Our results demonstrated that the Bi-LSTM model accurately predicted sow estrus with an 86% accuracy rate within the ground-truth region. Our findings were in line with the previous research [12], which noted that sows tend to stand or sit for longer periods during estrus. his suggests that CCTV footage can be effectively used to predict sow estrus, and by collecting more data and adjusting the ground-truth region, we can achieve greater accuracy.…”

Section: Discussionsupporting

confidence: 93%

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Sow Posture Analysis and Estrus Prediction Using Closed-Circuit Television Cameras

Song,

Kang,

Lim

et al. 2024

IEEE Access

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Sow estrus detection is one of the most critical tasks for improving the production performance of pig farms. However, accurately determining the onset of estrus is challenging because it is time consuming to check each sow and their performance, particularly during specific working hours. Moreover, estrus determination criteria are not standardized, as managers rely on their individual experiences. In this study, we proposed a method for predicting sow estrus using deep learning techniques. To detect sows and classify their postures, we used a lightweight deep-learning-based object detection model, You Only Look Once version 5 (YOLOv5). We trained one of the prediction models, Bidirectional Long Short-Term Memory (Bi-LSTM), which is a supervised learning model, using the time series data composed of a combination of each posture and holding time. By setting the ground truth as data from 24 h before the manager's estrus determination, we achieved an estrus prediction accuracy of 86 %. This study demonstrates the potential of using closed-circuit television (CCTV) footage to predict sow estrus, and the proposed method can contribute to reducing the labor required for sow estrus checks.

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Section: Discussionsupporting

confidence: 93%

“…As ovulation approaches, sows tend to search for boars more frequently. Another study [12] found that sows housed individually in stalls tend to stand or sit for longer periods compared with non-estrus periods because of their limited movement.…”

Section: A Sow Behavior and Estrusmentioning

confidence: 99%

Sow Posture Analysis and Estrus Prediction Using Closed-Circuit Television Cameras

Song,

Kang,

Lim

et al. 2024

IEEE Access

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“…It is possible that the behavioural changes caused by the hot treatment (see Results) may have contributed to the increase in backfat depth caused by the hot treatment, although any effect would probably have been small Cunningham, 1964 andMorrison, Hintz and Givens, 1968). Although from the very limited results presented in this paper there was no evidence of changes in the thyroid or adrenal glands caused by the hot treatment, it is possible that these did occur (Ingram and Slebodzinski, 1965;Collins and Weiner, 1968) and that these contributed to the increased backfat depth caused by the hot treatment.…”

Section: Discussionmentioning

confidence: 99%

Growth and backfat depth of pigs kept at a high temperature

Holmes

1971

Anim. Sci.

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1. Two experiments have been carried out to determine the effect of a high air temperature, 32-33°C, on growth and backfat depth of pigs, by comparison with a thermo-neutral air temperature, 22-24°C. The diet consisted predominantly of whey, since it was expected that this would enable appetite to be maintained at the higher temperature. 2. Food intake was reduced by 5% to 7% during the period of exposure to 32°C in Experiments 1 and 2 respectively. Growth rate and FCE were reduced significantly only in Experiment 2. 3. Backfat depths measured above the eye muscle were significantly increased by the hot treatment in both experiments; those measured on the split carcass were consistently greater for the hot treatment.

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“…Morrison, Hintz and Givens (1968) were unable to demonstrate an effect of exercise on the carcass composition of growing pigs. Morrison, Hintz and Givens (1968) were unable to demonstrate an effect of exercise on the carcass composition of growing pigs.…”

Section: Discussionmentioning

confidence: 88%

Effects of isolation, confinement and competition for feed on the energy exchanges of growing lambs

Webster¹,

Smith²,

Brockway³

1972

Anim. Sci.

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1. Calorimetric evaluation of the nutritive value of feeds for ruminants has, of necessity, involved using mature sheep isolated in respiration chambers. This experiment was designed to examine how such information relates to growing lambs reared in different ways. 2. Lambs were either completely isolated, individually fed, or fed in groups. Two lambs in each group were fed to gain 100 g/day (medium) and two to gain 200 g/day (high). Calorimetric measurements were made on individuals or groups at intervals over 20 weeks. 3. All lambs fed to gain 100 g/day consumed their entire ration, isolated lambs gained on average 123 g/day and the others 160 g/day. On the 'high' ration isolated lambs ate less than the others and gained 178 as against 228 g/day. 4. Metabolizable energy intake, heat production and thus energy retention were similar in all groups offered the 'medium' ration. Differences in energy retention on the 'high' ration were related to differences in intake. 5. The net availability for weight gain of the diet (k f ) estimated from energy balance trials conducted throughout the growth period (0-61) agreed well with that predicted from its content of metabolizable energy (0-63). 6. Estimates of the caloric density of the weight gain suggested that on the 'medium' ration the isolated lambs retained substantially more energy as fat than those reared in groups. These observations are discussed in relation to the design and interpretation of calorimetric experiments to predict the nutritive value of feeds for growing lambs.

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A note on effect of exercise on behaviour and performance of confined swine

Cited by 13 publications

References 3 publications

Sow Posture Analysis and Estrus Prediction Using Closed-Circuit Television Cameras

Sow Posture Analysis and Estrus Prediction Using Closed-Circuit Television Cameras

Growth and backfat depth of pigs kept at a high temperature

Effects of isolation, confinement and competition for feed on the energy exchanges of growing lambs

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