title: Farmer views on calving difficulty consequences on dairy and beef farms.
abstract: Calving difficulty (CD) is a key functional trait with significant influence on herd profitability and animal welfare. Breeding plays an important role in managing CD both at farm and industry level. An alternative to the economic value approach to determine the CD penalty is to complement the economic models with the analysis of farmer perceived on-farm impacts of CD. The aim of this study was to explore dairy and beef farmer views and perceptions on the economic and non-economic on-farm consequences of CD, to ultimately inform future genetic selection tools for the beef and dairy industries in Ireland. A standardised quantitative online survey was released to all farmers with e-mail addresses on the Irish Cattle Breeding Federation database. In total, 271 farmers completed the survey (173 beef farmers and 98 dairy farmers). Both dairy and beef farmers considered CD a very important issue with economic and non-economic components. However, CD was seen as more problematic by dairy farmers, who mostly preferred to slightly reduce its incidence, than by beef farmers, who tended to support increases in calf value even though it would imply a slight increase in CD incidence. Farm size was found to be related to dairy farmer views of CD with farmers from larger farms considering CD as more problematic than farmers from smaller farms. CD breeding value was reported to be critical for selecting beef sires to mate with either beef or dairy cows, whereas when selecting dairy sires, CD had lower importance than breeding values for other traits. There was considerable variability in the importance farmers give to CD breeding values that could not be explained by the farm type or the type of sire used, which might be related to the farmer non-economic motives. Farmer perceived economic value associated with incremental increases in CD increases substantially as the CD level considered increases. This non-linear relationship cannot be reflected in a standard linear index weighting. The results of this paper provide key underpinning support to the development of non-linear index weightings for CD in Irish national indexes.
authors.affiliation: 1AbacusBio Limited, Ground Floor, PublicTrust Building 442 Moray Place, PO Box 5585, Dunedin 9016,New Zealand.
authors.forename: D
authors.initials: D
authors.lastname: Martin-Collado
authors.affiliation: 1AbacusBio Limited, Ground Floor, PublicTrust Building 442 Moray Place, PO Box 5585, Dunedin 9016,New Zealand.
authors.forename: F
authors.initials: F
authors.lastname: Hely
authors.affiliation: 1AbacusBio Limited, Ground Floor, PublicTrust Building 442 Moray Place, PO Box 5585, Dunedin 9016,New Zealand.
authors.forename: T J
authors.initials: TJ
authors.lastname: Byrne
authors.affiliation: 2Irish Cattle Breeding Federation,Highfield House, Shinagh,Bandon, Co. Cork, Ireland.
authors.forename: R
authors.initials: R
authors.lastname: Evans
authors.affiliation: 2Irish Cattle Breeding Federation,Highfield House, Shinagh,Bandon, Co. Cork, Ireland.
authors.forename: A R
authors.initials: AR
authors.lastname: Cromie
authors.affiliation: 1AbacusBio Limited, Ground Floor, PublicTrust Building 442 Moray Place, PO Box 5585, Dunedin 9016,New Zealand.
authors.forename: P R
authors.initials: PR
authors.lastname: Amer
mesh_terms: D000822:Animal Husbandry / Q000191:economics / Q000379:methods*; D000827:Animal Welfare; D000818:Animals; D001947:Breeding; D002417:Cattle; D002418:Cattle Diseases / Q000191:economics*; D003625:Data Collection; D004420:Dystocia / Q000191:economics / Q000662:veterinary*; D005260:Female; D006801:Humans; D011247:Pregnancy; D012307:Risk Factors; D012641:Selection, Genetic
keywords: beef; breeding index; calving difficulty; dairy; farmer views