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From the same journal

Effect of the nutritional environment and reproductive investment on herbivore-parasite interactions in grazing environments

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Effect of the nutritional environment and reproductive investment on herbivore-parasite interactions in grazing environments. / Smith, L. A.; White, P. C L; Hutchings, M. R.

In: Behavioral Ecology, Vol. 17, No. 4, 07.2006, p. 591-596.

Research output: Contribution to journalArticle

Harvard

Smith, LA, White, PCL & Hutchings, MR 2006, 'Effect of the nutritional environment and reproductive investment on herbivore-parasite interactions in grazing environments', Behavioral Ecology, vol. 17, no. 4, pp. 591-596. https://doi.org/10.1093/beheco/ark004

APA

Smith, L. A., White, P. C. L., & Hutchings, M. R. (2006). Effect of the nutritional environment and reproductive investment on herbivore-parasite interactions in grazing environments. Behavioral Ecology, 17(4), 591-596. https://doi.org/10.1093/beheco/ark004

Vancouver

Smith LA, White PCL, Hutchings MR. Effect of the nutritional environment and reproductive investment on herbivore-parasite interactions in grazing environments. Behavioral Ecology. 2006 Jul;17(4):591-596. https://doi.org/10.1093/beheco/ark004

Author

Smith, L. A. ; White, P. C L ; Hutchings, M. R. / Effect of the nutritional environment and reproductive investment on herbivore-parasite interactions in grazing environments. In: Behavioral Ecology. 2006 ; Vol. 17, No. 4. pp. 591-596.

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@article{3dcc0f210ef04676a0fb4ed770a5c9f9,
title = "Effect of the nutritional environment and reproductive investment on herbivore-parasite interactions in grazing environments",
abstract = "Parasitism is a serious challenge to herbivore health and fitness. To avoid parasites, herbivores avoid grazing near feces, creating a mosaic of contaminated tall avoided areas (tussocks) and noncontaminated short grazed areas (gaps). The mosaic represents a nutrition versus parasitism trade-off in that feces-contaminated tussocks are localized concentrations of both forage resources and parasites. Here, we use a grazing experiment with a natural tussock-gap mosaic to determine how the nutritional environment and reproductive effort affect sheep grazing decisions when faced with this trade-off. There were 3 animal treatments (Barren ewes, ewes suckling a single lamb, and ewes suckling twin lambs) and 2 environment treatments (low and high nitrogen). Sward selection and grazing behavior were measured using focal observations on grazing ewes. Sheep showed an overall strong and significant avoidance of tussocks across all treatments. However, there was a reduction in the avoidance of tussocks by ewes on the low-nitrogen (low-N) plots. Ewes suckling twins showed a reduced avoidance of tussocks compared with barren ewes. Lactating ewes in low-N environments further reduced their avoidance of tussocks. Ewes with twins, which are at greatest risk from parasites, had the greatest contact with feces and thus parasites, especially in low-N environments. We conclude that twin-bearing ewes accept the increased risk of parasitism in order to gain the nutrients required to support increased reproductive effort, thus increasing their investment in current offspring at the cost of increased risk of parasitism and thus future potential reproductive attempts. {\circledC} The Author 2006. Published by Oxford University Press on behalf of the International Society for Behavioral Ecology. All rights reserved.",
keywords = "Feces avoidance, Fitness, Grazing, Maternal investment, Parasite risk",
author = "Smith, {L. A.} and White, {P. C L} and Hutchings, {M. R.}",
year = "2006",
month = "7",
doi = "10.1093/beheco/ark004",
language = "English",
volume = "17",
pages = "591--596",
journal = "Behavioral Ecology",
issn = "1045-2249",
publisher = "Oxford University Press",
number = "4",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Effect of the nutritional environment and reproductive investment on herbivore-parasite interactions in grazing environments

AU - Smith, L. A.

AU - White, P. C L

AU - Hutchings, M. R.

PY - 2006/7

Y1 - 2006/7

N2 - Parasitism is a serious challenge to herbivore health and fitness. To avoid parasites, herbivores avoid grazing near feces, creating a mosaic of contaminated tall avoided areas (tussocks) and noncontaminated short grazed areas (gaps). The mosaic represents a nutrition versus parasitism trade-off in that feces-contaminated tussocks are localized concentrations of both forage resources and parasites. Here, we use a grazing experiment with a natural tussock-gap mosaic to determine how the nutritional environment and reproductive effort affect sheep grazing decisions when faced with this trade-off. There were 3 animal treatments (Barren ewes, ewes suckling a single lamb, and ewes suckling twin lambs) and 2 environment treatments (low and high nitrogen). Sward selection and grazing behavior were measured using focal observations on grazing ewes. Sheep showed an overall strong and significant avoidance of tussocks across all treatments. However, there was a reduction in the avoidance of tussocks by ewes on the low-nitrogen (low-N) plots. Ewes suckling twins showed a reduced avoidance of tussocks compared with barren ewes. Lactating ewes in low-N environments further reduced their avoidance of tussocks. Ewes with twins, which are at greatest risk from parasites, had the greatest contact with feces and thus parasites, especially in low-N environments. We conclude that twin-bearing ewes accept the increased risk of parasitism in order to gain the nutrients required to support increased reproductive effort, thus increasing their investment in current offspring at the cost of increased risk of parasitism and thus future potential reproductive attempts. © The Author 2006. Published by Oxford University Press on behalf of the International Society for Behavioral Ecology. All rights reserved.

AB - Parasitism is a serious challenge to herbivore health and fitness. To avoid parasites, herbivores avoid grazing near feces, creating a mosaic of contaminated tall avoided areas (tussocks) and noncontaminated short grazed areas (gaps). The mosaic represents a nutrition versus parasitism trade-off in that feces-contaminated tussocks are localized concentrations of both forage resources and parasites. Here, we use a grazing experiment with a natural tussock-gap mosaic to determine how the nutritional environment and reproductive effort affect sheep grazing decisions when faced with this trade-off. There were 3 animal treatments (Barren ewes, ewes suckling a single lamb, and ewes suckling twin lambs) and 2 environment treatments (low and high nitrogen). Sward selection and grazing behavior were measured using focal observations on grazing ewes. Sheep showed an overall strong and significant avoidance of tussocks across all treatments. However, there was a reduction in the avoidance of tussocks by ewes on the low-nitrogen (low-N) plots. Ewes suckling twins showed a reduced avoidance of tussocks compared with barren ewes. Lactating ewes in low-N environments further reduced their avoidance of tussocks. Ewes with twins, which are at greatest risk from parasites, had the greatest contact with feces and thus parasites, especially in low-N environments. We conclude that twin-bearing ewes accept the increased risk of parasitism in order to gain the nutrients required to support increased reproductive effort, thus increasing their investment in current offspring at the cost of increased risk of parasitism and thus future potential reproductive attempts. © The Author 2006. Published by Oxford University Press on behalf of the International Society for Behavioral Ecology. All rights reserved.

KW - Feces avoidance

KW - Fitness

KW - Grazing

KW - Maternal investment

KW - Parasite risk

UR - http://www.scopus.com/inward/record.url?scp=33745585103&partnerID=8YFLogxK

U2 - 10.1093/beheco/ark004

DO - 10.1093/beheco/ark004

M3 - Article

VL - 17

SP - 591

EP - 596

JO - Behavioral Ecology

T2 - Behavioral Ecology

JF - Behavioral Ecology

SN - 1045-2249

IS - 4

ER -