An investigation into the causation of chewing behaviour in growing pigs: The role of exploration and feeding motivation

Day, J. M.; Kyriazakis, Ι.; Lawrence, A. S. C.

doi:10.1016/0168-1591(95)01022-x

Cited by 46 publications

(21 citation statements)

References 23 publications

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“…However, in spite of altering the underlying level of feeding motivation due to the small quantities in indoor breeding conditions (Day et al, 1996), grazing pigs rise to a high intake levels along the whole day. Therefore, mean daily consumption of entire acorns is lower than the previous rough calculations of 8 to 10 kg traditionally proposed by several authors for Iberian pig (e.g.…”

Section: M1 M2mentioning

confidence: 98%

Foraging of Iberian fattening pigs grazing natural pasture in the dehesa

et al. 2009

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Section: M1 M2mentioning

confidence: 98%

Foraging of Iberian fattening pigs grazing natural pasture in the dehesa

et al. 2009

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“…In fact, under natural or semi-natural conditions, pigs spend a large part of the daytime exploring the surrounding environment; mainly sniffing, chewing and biting edible and inedible items (Graves, 1984;Stolba and Wood-Gush, 1984). The pigs seem to be highly motivated to behave in this way (Horrel and Ness, 1995;Day et al, 1996) and this can, therefore, be considered a priority need for these animals (Jensen and Toates, 1993;Studnitz et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Longitudinal effects of environmental enrichment on behaviour and physiology of pigs reared on an intensive-stock farm

Manciocco

Sensi

Moscati

et al. 2011

Italian Journal of Animal Science

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The aim of this paper was to provide a longitudinal evaluation of the effects of physical enrichments on the behaviour and physiology of intensive stock-farming pigs. Twenty-eight crossbred pigs of both sexes, were exposed to four types of enrichments (hemp ropes, steel chains, plastic balls, rubber hoses) over a period of eleven weeks. This investigation was based on specific abnormal behaviours and physiological indicators, including hematologic parameters. For behavioural score, focal sampling was used with recording of abnormal behaviours (body-, tail-and ear-biting), belly nosing, running, and interaction with objects (for Enriched pigs). The presence of skin injuries was also recorded. In general, the frequency of abnormal behaviours was significantly reduced in the Enriched group. A timerelated profile appeared in the use of the enrichments. Males showed higher occurrence of skin injuries than females. Physiological measurements, such as levels of complement system, white blood cells and neutrophils, were lower in pigs from the Enriched group.Enriched pigs, as a whole, presented much lower levels of serum DHEA-S concentration over two weeks. The findings of this study show the successful provision of appropriate enrichments to encourage behaviours which may result in satisfactory animal oral interaction with the enriching objects, preventing them biting pen-mates. In this respect, the objects proposed were strongly effective in producing changes in behaviour which could mitigate inadequate conditions, such as the relationship between animal body weight and the available space allowance.

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“…Consequently, Kyriazakis and Tolkamp (2011) have suggested that such failures in meeting the requirements of the pigs may lead to undesirable behaviors, such as behavioral vice (e.g. tail biting; Day et al, 1996). Increasing the number of phase feeding sequences resulted in an increase in the percentage of animals whose digP were met and a decrease in the percentage of population supplied with <85% of their requirements at a particular BW.…”

Section: Discussionmentioning

confidence: 99%

Quantifying the consequences of nutritional strategies aimed at decreasing phosphorus excretion from pig populations: a modeling approach

Symeou

Leinonen

Kyriazakis

2016

animal

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There is a global imperative to reduce phosphorous (P) excretion from pig systems. In this study, a previously validated deterministic model was modified to be stochastic, in order to investigate the consequences of different management strategies on P excretion by a group of growing pigs. The model predicts P digestion, retention and excretion from feed composition and growth parameters that describe a specified pig phenotype. Stochasticity was achieved by introducing random variation in the latter. The strategies investigated were: (1) changing feed composition frequently in order to match more closely pig digestible P (digP) requirements to feed composition (phase feeding) and (2) grouping pigs into light and heavy groups and feeding each group according to the requirements of their group average BW (sorting). Phase feeding reduced P excretion as the number of feeding phases increased. The effect was most pronounced as feeding phases increased from 1 to 2, with a 7.5% decrease achieved; the increase in phases from 2 to 3 was associated with a further 2.0% reduction. Similarly, the effect was more pronounced when the feed targeted the population requirements for digP at the average BW of the first third, rather than the average requirements at the mid-point BW of each feeding sequence plan. Increasing the number of feeding phases increased the percentage of pigs that met their digP requirements during the early stages of growth and reduced the percentage of pigs that were supplied <85% of their digP requirements at any stage of their growth; the latter may have welfare implications. Sorting of pigs reduced P excretion to a lesser extent; the reduction was greater as the percentage of pigs in the light group increased from 10% to 30% (from 1.5% to 3.0% reduction, respectively). This resulted from an increase in the P excreted by the light group, accompanied by a decrease in the P excreted by the remaining pigs. Sorting increased the percentage of light pigs that met their dig P requirements, but only slightly decreased the percentage of heavy pigs that met these requirements at any point of their growth. Exactly the converse was the case as far as the percentage of pigs that were supplied <85% of their digP requirements were concerned. The developed model is flexible and can be used to investigate the effectiveness of other management strategies in reducing P excretion from groups of pigs, including precision livestock feeding.

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An investigation into the causation of chewing behaviour in growing pigs: The role of exploration and feeding motivation

Cited by 46 publications

References 23 publications

Foraging of Iberian fattening pigs grazing natural pasture in the dehesa

Foraging of Iberian fattening pigs grazing natural pasture in the dehesa

Longitudinal effects of environmental enrichment on behaviour and physiology of pigs reared on an intensive-stock farm

Quantifying the consequences of nutritional strategies aimed at decreasing phosphorus excretion from pig populations: a modeling approach

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