Results 71 to 80 of about 63,341 (244)

The motivation-based calving facility: Social and cognitive factors influence isolation seeking behaviour of Holstein dairy cows at calving

PLoS ONE, 2018
In order to improve animal welfare it is recommended that dairy farmers move calving cows from the herd to individual pens when calving is imminent. However, the practicality of moving cows has proven a challenge and may lead to disturbance of the cows ...
M. Rørvang, M. Herskin, M. B. Jensen
semanticscholar   +1 more source

Productive efficiency of cows primiparous aberdeen angus of the body size and milk production levels

Bioscience Journal, 2016
Assessment of the productive efficiency of 30 primiparous Aberdeen Angus cows of different body sizes, classified at calving as heavy (375±10.5 kg) or light (283±7.7 kg), and different total milk-yield levels, classified as high (868±24.5 kg) or low ...
Ricardo Zambarda Vaz, Edson Luiz Azambuja Ribeiro, João Restle, Fabiano Nunes Vaz, Paulo Santana Pacheco, José Luiz Moletta   +5 more
doaj   +1 more source

Genome-wide association studies of fertility and calving traits in Brown Swiss cattle using imputed whole-genome sequences

BMC Genomics, 2017
BackgroundThe detection of quantitative trait loci has accelerated with recent developments in genomics. The introduction of genomic selection in combination with sequencing efforts has made a large amount of genotypic data available.
M. Frischknecht, B. Bapst, F. Seefried, H. Signer-Hasler, D. Garrick, C. Stricker, R. Fries, I. Russ, J. Sölkner, A. Bieber, M. Strillacci, Birgit Gredler-Grandl, C. Flury   +12 more
semanticscholar   +1 more source

On nonlinear strain theory for a viscoelastic material model and its implications for calving of ice shelves

Journal of Glaciology, 2019
In the current ice-sheet models calving of ice shelves is based on phenomenological approaches. To obtain physics-based calving criteria, a viscoelastic Maxwell model is required accounting for short-term elastic and long-term viscous deformation.
JULIA CHRISTMANN, RALF MÜLLER, ANGELIKA HUMBERT   +2 more
doaj   +1 more source

Calving dynamics at Jakobshavn Isbrae (Sermeq Kujalleq) controlled by local geometry: insights from a 3D Stokes calving model

Journal of Glaciology
We present the first simulations of Jakobshavn Isbrae (Sermeq Kujalleq), west Greenland, using a 3D Stokes calving model that permits unrestricted advance and retreat.
Iain Wheel, Anna J. Crawford, Douglas I. Benn   +2 more
doaj   +1 more source

Modeling of ocean‐induced ice melt rates of five west Greenland glaciers over the past two decades

Geophysical Research Letters, 2016
High‐resolution, three‐dimensional simulations from the Massachusetts Institute of Technology general circulation model ocean model are used to calculate the subaqueous melt rate of the calving faces of Umiamako, Rinks, Kangerdlugssup, Store, and ...
E. Rignot, Y. Xu, D. Menemenlis, J. Mouginot, B. Scheuchl, X. Li, M. Morlighem, H. Seroussi, M. van den Broeke, I. Fenty, C. Cai, L. An, B. de Fleurian   +12 more
doaj   +1 more source

Loss of floating glacier tongues from the Yelverton Bay region, Ellesmere Island, Canada

Journal of Glaciology, 2019
A total of eight floating glacier tongues have shrunk in area by >85% from the Yelverton Bay region of Northern Ellesmere Island since 1959, with unusually large losses since 2005.
ADRIENNE WHITE, LUKE COPLAND
doaj   +1 more source

Calving and rifting on the McMurdo Ice Shelf, Antarctica

Annals of Glaciology, 2017
On 2 March 2016, several small en échelon tabular icebergs calved from the seaward front of the McMurdo Ice Shelf, and a previously inactive rift widened and propagated by ~3 km, ~25% of its previous length, setting the stage for the future calving of a ~
A. Banwell, I. Willis, G. Macdonald, B. Goodsell, D. Mayer, Anthony Powell, D. Macayeal   +6 more
semanticscholar   +1 more source

Non-linear glacier response to calving events, Jakobshavn Isbræ, Greenland

Journal of Glaciology, 2019
Jakobshavn Isbræ, a tidewater glacier that produces some of Greenland's largest icebergs and highest speeds, reached record-high flow rates in 2012 (Joughin and others, 2014).
RYAN CASSOTTO, MARK FAHNESTOCK, JASON M. AMUNDSON, MARTIN TRUFFER, MARGARET S. BOETTCHER, SANTIAGO DE LA PEÑA, IAN HOWAT   +6 more
doaj   +1 more source

Influence of age at first calving in a continuous calving season on productive, functional, and economic performance in a Blonde d'Aquitaine beef population.

Journal of Animal Science, 2018
The lifetime production of 7,655 cows with known age at first calving and a total of 27,118 parity records from 301 purebred Blonde d'Aquitaine herds were used to demonstrate the economic benefits of 2 yr of age at first calving.
J. López-Paredes, M. Pérez-Cabal, J. Jiménez-Montero, R. Alenda   +3 more
semanticscholar   +1 more source