Using Experience and Supplementation to Increase Juniper Consumption by Three Different Breeds of Sheep

Anderson, Jess R.; Scott, Cody B.; Taylor, Charles A.; Owens, Corey J.; Jackson, James R.; Steele, Diana; Brantley, Richard

doi:10.2111/rem-d-12-00004.1

Cited by 8 publications

(2 citation statements)

References 25 publications

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“…Thus, the response to supplementation of the minerals could also be due to the interrelationships between nutrients such as between protein and energy (Anderson et al, 2013;McGrath et al, 2013). Furthermore, the concentrations of the minerals in the diet are regulated in the body of the animal by homeostatic mechanisms and remain within small ranges to achieve a well-balanced steady state.…”

Section: Resultsmentioning

confidence: 99%

Performance of confined and grazing lambs fed diets with different mineral-concentrate supplements

et al. 2014

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For confined animals, performance is improved when their diet is supplemented with a mineral mixture and protein energy. This study evaluated the effect of dietary supplementation on feedlot sheep on native pasture. Two experiments were conducted in sequence, with the animals constrained in one and animals confined to pasture in the other. The experiments were conducted with 32 Santa Ines lambs, with average initial weights of 16.8 and 19.9 kg for the constrained and pasture studies, respectively. In both experiments, the animals were offered the following supplements: Supplement 1 = 200 g of the concentrate without mineral mixture; Supplement 2 = 200 g of the concentrate with mineral mixture + Mn + Zn; Supplement 3 = 300 g of the concentrate with mineral mixture + Mn + Zn; and Supplement 4: 300 g of the concentrate with mineral mixture + Zn without Mn. The intake of the mineral mixture resulted in a higher average intake of crude protein in feedlot lambs and neutral detergent fiber in pasture lambs than the other diets, regardless of the presence of manganese and thus provided more consistent weight gain among the animals. The mineral mixture supplementation increased the average daily intake of Zn and Mn. The animals on the diets containing 300 g day -1 supplementation with the concentrated mineral mixture also had more weight gain and better feed conversion than those on the other diets, most likely because of the greater responsiveness to supplementation in these animals.

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Section: Resultsmentioning

confidence: 99%

Performance of confined and grazing lambs fed diets with different mineral-concentrate supplements

et al. 2014

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“…Animals may be conditioned to learn to eat foods they would normally avoid by limiting familiar foods and by optimizing factors such as diet quality and sequence and timing of feeding. [42][43][44] However, behavior modification has met with only limited success under field conditions, likely because of the complexity and constantly changing nature of plant communities and chemical signals that animals must process. 45,46 When production systems are compatible, small improved pastures or strategically seeding arid-adapted plants might allow for increased shrub intake by improving complementarity, capitalizing on sequence of PSM intake, etc.…”

Section: Specific Considerations On Shrub Usementioning

confidence: 99%

The Changing Role of Shrubs in Rangeland-Based Livestock Production Systems: Can Shrubs Increase Our Forage Supply?

Estell¹,

Havstad²,

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et al. 2014

Rangelands

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Using the Specialization Framework to Determine Degree of Dietary Specialization in a Herbivorous Woodrat

et al. 2015

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To be considered a dietary specialist, mammalian herbivores must consume large quantities of a plant species considered "difficult" with respect to nutrient or toxin content, and possess specialized adaptations to deal with plant defensive compounds or low nutritional content. Populations of Neotoma lepida in the Great Basin consume Juniperus osteosperma, a plant heavily defended by terpenes, but a detailed dietary analysis of this population is lacking. Therefore, we investigated the extent of dietary specialization in this species in comparison with the better-studied specialist species, N. stephensi. Microhistological analysis of feces from N. lepida revealed that greater than 90% of their diet in nature was comprised of juniper. In laboratory tolerance trials, N. lepida tolerated a diet of 80% J. osteosperma, similar to that observed for N. stephensi. There was no difference in the abilities of N. lepida and N. stephensi to metabolize hexobarbital, a proxy compound for terpene metabolism. In preference tests of native and non-native juniper species, N. lepida did not exhibit a preference for its native or co-occurring juniper, J. osteosperma, over the non-native species, J. monosperma, whereas N. stephensi preferred its native or co-occurring juniper J. monosperma over non-native J. osteosperma. Behavioral and habitat differences between these woodrat species lead to the categorization of N. stephensi as an obligate juniper specialist with a small range that overlaps that of its preferred food, J. monosperma, and N. lepida as a facultative juniper specialist with a large range, and only a portion of its distribution containing populations that feed extensively on J. osteosperma.

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Using Experience and Supplementation to Increase Juniper Consumption by Three Different Breeds of Sheep

Cited by 8 publications

References 25 publications

Performance of confined and grazing lambs fed diets with different mineral-concentrate supplements

Performance of confined and grazing lambs fed diets with different mineral-concentrate supplements

The Changing Role of Shrubs in Rangeland-Based Livestock Production Systems: Can Shrubs Increase Our Forage Supply?

Using the Specialization Framework to Determine Degree of Dietary Specialization in a Herbivorous Woodrat

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