Effects of origin, experiences early in life, and genetics on bitterweed consumption by sheep

Frost, Rachel A.; Scott, Cody B.; Walker, John W.; Hartmann, Frank

doi:10.1016/j.applanim.2003.09.001

Cited by 7 publications

(2 citation statements)

References 29 publications

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“…In summary, plants contain phytotoxins, making it necessary for all grazing and browsing animals to have evolved foraging strategies and internal mechanisms to mitigate phytotoxicosis. It is well established that foraging strategies learned from observation of maternal behavior greatly influence consumption of forage containing high concentrations of phytotoxins by goats (Frost et al, 2003;Glasser et al, 2009). Our results are the first to confirm that internal mechanisms in goats also play a role, and individual goats within a population differ in physiological mechanisms responsible for mitigation of phytotoxicosis.…”

Section: Discussionsupporting

confidence: 64%

Pharmacokinetic differences in exposure to camphor after intraruminal dosing in selectively bred lines of goats1

Campbell¹,

Frost

Mosley

et al. 2010

Journal of Animal Science

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A pharmacokinetic dosing study with camphor was used to determine whether selection lines of high-juniper-consuming goats (HJC, n = 12) and low-juniper-consuming goats (LJC, n = 12) differed in their respective disposition kinetics. Postdosing plasma camphor concentrations were used to examine whether a timed single blood sample collected after intraruminal administration of camphor would be a useful screening test to aid in the identification of HJC. Yearling female Boer x Spanish goats (n = 24) received a single intraruminal dose of monoterpene cocktail (0.270 g/kg of BW) containing 4 different monoterpenes that represented their composition previously reported for Ashe juniper (Juniperus ashei). Camphor, the predominant monoterpene in Ashe juniper, was 49.6% of the mix and was the monoterpene analyzed for this study. Blood samples were taken at 15 time points from 0 to 8 h after dosing. Concentrations of camphor were measured in plasma using solid phase extraction and gas chromatography/flame-ionization detection analysis. Maximal plasma concentration of camphor was greater for LJC than HJC (P = 0.01), and area under the curve extrapolated to infinity was greater for LJC than HJC (P < 0.01). Total systemic exposure (area under the curve) to camphor was 5 times less in HJC goats. We conclude that 1) HJC goats possess internal mechanisms to reduce the bioavailability of camphor, and 2) a blood sample taken at 45 min or at 60 min after intraruminal administration of camphor may be useful for identifying HJC individual animals from within large populations of goats.

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Section: Discussionsupporting

confidence: 64%

Pharmacokinetic differences in exposure to camphor after intraruminal dosing in selectively bred lines of goats1

Campbell¹,

Frost

Mosley

et al. 2010

Journal of Animal Science

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“…Similarly, the genotype of sires appears to affect consumption of other poisonous plants like bitterweed (Hymenoxys odorata DC.) (Frost et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Sire Influence on Juniper Consumption by Goats

Ellis

Jones

Scott

et al. 2005

Rangeland Ecology & Management

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Goats avoid eating redberry juniper (Juniperus pinchottii Sudw.) when other palatable forages are available but will increase intake of juniper when exposed to the plant for several days. Intake of redberry juniper also differs among breeds and individual goats. Selection based on foraging habits could further improve juniper intake. The purpose of this study was to determine the influence of sires on juniper consumption. Heritability of redberry juniper intake was assessed for 3 years (1997, 1998, 2000) by placing male Boer-Spanish cross goats from 4-8 sires (the number of sires differed among years) in individual pens and feeding juniper (200 g) daily for 2 hours over 5 to 10 days. Feeding juniper was done after weaning kid goats each year. Juniper intake was similar among sire groups within years. Heritability of juniper consumption was low (11%) across the 3 years of this study. Goats increased juniper intake daily while in individual pens. These results suggest that an acceptance of juniper by goats can be conditioned through exposure to the plant after weaning, and that juniper consumption does not appear to be a highly heritable trait. Resumen Las cabras evitan comer ''Redberry juniper'' (Juniperus pinchottii Sudw.) cuando otros forrajes más apetecibles está n disponibles, pero incrementan el consumo de ''juniper'' cuando está n expuestas a él por varios días. El consumo de ''Redberry juniper'' también varia entre razas y cabras individuales. La selecció n basada en los há bitos de forrajeo pudiera mejorar má s el consumo de ''juniper''. El propó sito de este estudio fue determinar la influencia del padre en el consumo del ''juniper''. La heredabilidad del consumo de ''Redberry juniper'' fue evaluado por 3 añ os (1997, 1998 y 2000) colocando machos cruzados de Boer-Spanish (provenientes de 4-8 padres y el nú mero de padres difirió entre añ os), en corrales individuales y alimentá ndolos con ''juniper'' (200 g) diariamente por 2 h durante 5 a 10 días. La alimentació n con ''juniper'' fue hecha después de destetar los cabritos cada añ o. El consumo de ''juniper'' fue similar entre grupos de padres dentro de añ os. La heredabilidad del consumo de ''juniper'' fue baja (11%) a través de los tres añ os del estudio. Las cabras incrementaron el consumo diario de ''juniper'' mientras estuvieron en los corrales individuales. Estos resultados sugieren que una aceptació n del ''juniper'' por las cabras puede ser condicionada a través de la exposició n a la planta después del destete, y que el consumo de ''juniper'' no parece ser una característica de alta heredabilidad.

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Asteraceae Martinov

and¹,

Tyrl²

2012

Toxic Plants of North America

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Effects of origin, experiences early in life, and genetics on bitterweed consumption by sheep

Cited by 7 publications

References 29 publications

Pharmacokinetic differences in exposure to camphor after intraruminal dosing in selectively bred lines of goats1

Pharmacokinetic differences in exposure to camphor after intraruminal dosing in selectively bred lines of goats1

Sire Influence on Juniper Consumption by Goats

Asteraceae Martinov

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