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פותח על ידי קלירמאש פתרונות בע"מ -
Conditioned aversion to minimize Ferula communis intake by orphaned lambs
Year:
1999
Source of publication :
Journal of Range Management
Authors :
בן-משה, עזרא
;
.
לנדאו, יאן
;
.
פרבולוצקי, אבי
;
.
Volume :
52
Co-Authors:
Landau, S.Y., Department of Natural Resources, Institute of Field and Garden Crops, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Ben-Moshe, E., Department of Natural Resources, Institute of Field and Garden Crops, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Egber, A., Sheep and Goats Department, Extension Service, Ministry of Agriculture, P.O. Box 7054, Haqirya Tel Aviv 61070, Israel
Shlosberg, A., Kimron Veterinary Institute, P.O. Box 12, Bet Dagan 50250, Israel
Bellaiche, M., Kimron Veterinary Institute, P.O. Box 12, Bet Dagan 50250, Israel
Perevolotsky, A., Department of Natural Resources, Institute of Field and Garden Crops, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
436
To page:
439
(
Total pages:
4
)
Abstract:
The circum-Mediterranean perennial Ferula communis L. (giant fennel) has anticoagulant constituents. Mortality from poisoning can affect 5% of the sheep grazed in infested areas and most casualties are ewe-lambs at the onset of the grazing season. In intensive sheep production systems, ewe-lambs are 'orphaned', artificially reared, and have no opportunity to acquire safe dietary habits by imitating their mothers. The aim of the present study was to evaluate the intake of F. communis in such lambs and to assess the potential of using conditioned aversion as a managerial tool to decrease the frequency of F. communis poisoning. Six lambs weighing approximately 28 kg were averted to F. communis using 2 administrations of 4g LiCl in aqueous solution, given immediately after a meal of F. communis; 6 similar lambs served as unaverted controls. The intake of F. communis and the persistence of aversion were assessed over 7 observation days using a simulation of an infested field where freshly cut bunches of F. communis were tied to stakes at 10-m intervals in ryegrass (Lolium multiflorum Lam.) paddocks at the late vegetative stage. Averted lambs grazed separately from unaverted counterparts. Time spent by lambs foraging on F. communis was in the range of 0-0.015 min/hour (not significantly different from nil) in averted, and 0.15-0.24 min/hour in unaverted lambs, respectively (P = 0.002). Consequently, the rate of disappearance of F. communis was greater when grazing was by unaverted than averted lambs (0.29 and 0.15 g/min, P = 0.01). The aversion persisted for 25 days after the LiCl treatment, at which time observations were discontinued. Assuming that the amount of F. communis that disappeared is close to actual intake by lambs, intake by unaverted lambs was high enough to endanger the lambs, whereas averted lambs consumed safe amounts of the poisonous plant. It is concluded that conditioned aversion has the potential to alleviate the problem of F. communis poisoning in orphaned ewe-lambs.
Note:
Related Files :
Conditioned food aversion
Ferula communis
Grazing
Lolium multiflorum
mortality
Poisonous plants
sheep
Sheep grazing
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24199
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:05
Scientific Publication
Conditioned aversion to minimize Ferula communis intake by orphaned lambs
52
Landau, S.Y., Department of Natural Resources, Institute of Field and Garden Crops, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Ben-Moshe, E., Department of Natural Resources, Institute of Field and Garden Crops, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Egber, A., Sheep and Goats Department, Extension Service, Ministry of Agriculture, P.O. Box 7054, Haqirya Tel Aviv 61070, Israel
Shlosberg, A., Kimron Veterinary Institute, P.O. Box 12, Bet Dagan 50250, Israel
Bellaiche, M., Kimron Veterinary Institute, P.O. Box 12, Bet Dagan 50250, Israel
Perevolotsky, A., Department of Natural Resources, Institute of Field and Garden Crops, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Conditioned aversion to minimize Ferula communis intake by orphaned lambs
The circum-Mediterranean perennial Ferula communis L. (giant fennel) has anticoagulant constituents. Mortality from poisoning can affect 5% of the sheep grazed in infested areas and most casualties are ewe-lambs at the onset of the grazing season. In intensive sheep production systems, ewe-lambs are 'orphaned', artificially reared, and have no opportunity to acquire safe dietary habits by imitating their mothers. The aim of the present study was to evaluate the intake of F. communis in such lambs and to assess the potential of using conditioned aversion as a managerial tool to decrease the frequency of F. communis poisoning. Six lambs weighing approximately 28 kg were averted to F. communis using 2 administrations of 4g LiCl in aqueous solution, given immediately after a meal of F. communis; 6 similar lambs served as unaverted controls. The intake of F. communis and the persistence of aversion were assessed over 7 observation days using a simulation of an infested field where freshly cut bunches of F. communis were tied to stakes at 10-m intervals in ryegrass (Lolium multiflorum Lam.) paddocks at the late vegetative stage. Averted lambs grazed separately from unaverted counterparts. Time spent by lambs foraging on F. communis was in the range of 0-0.015 min/hour (not significantly different from nil) in averted, and 0.15-0.24 min/hour in unaverted lambs, respectively (P = 0.002). Consequently, the rate of disappearance of F. communis was greater when grazing was by unaverted than averted lambs (0.29 and 0.15 g/min, P = 0.01). The aversion persisted for 25 days after the LiCl treatment, at which time observations were discontinued. Assuming that the amount of F. communis that disappeared is close to actual intake by lambs, intake by unaverted lambs was high enough to endanger the lambs, whereas averted lambs consumed safe amounts of the poisonous plant. It is concluded that conditioned aversion has the potential to alleviate the problem of F. communis poisoning in orphaned ewe-lambs.
Scientific Publication
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