Results 81 to 90 of about 87,193 (312)

Predicted genetic consequences of alternative population control strategies for North American plains bison in Yellowstone National Park

The Journal of Wildlife Management, EarlyView.
Management of bison in Yellowstone National Park under the available strategies that maintained ≥3,500 individuals (1:1 sex ratio), removed <40% of the population at a time and prioritized relatives for removal were predicted to maintain genetic variation at levels consistent with long‐term conservation (>95% of existing variation).
Shawna J. Zimmerman, Chris Geremia, Sara J. Oyler‐McCance   +2 more
wiley   +1 more source

The effect of Holstein-Friesian genotype and feeding system on selected performance parameters of dairy cows on grass-based systems of milk production in Ireland [PDF]

, 2006
End of project reportThe overall objective of this project was to assess, the effect of strain of Holstein-Friesian dairy cow, pasture-based feed system (FS) and their interaction on animal performance in terms of milk productivity and lactation profile,
Berry, Donagh, Buckley, James F., Dillon, Pat, Horan, Brendan, Linnane, M., McCarthy, S., Mee, John F, O’Connor, Paula M., Shalloo, Laurence   +8 more
core  

Accuracy of predicting milk yield from alternative milk recording schemes [PDF]

, 2005
peer-reviewedThe effect of reducing the frequency of official milk recording and the number of recorded samples per test-day on the accuracy of predicting daily yield and cumulative 305-day yield was investigated.
Berry, Donagh, Cromie, A. R., Dillon, Pat, Olori, V. E., Rath, Myles V, Veerkamp, Roel F.   +5 more
core   +1 more source

Density‐dependent habitat selection in plains bison

The Journal of Wildlife Management, EarlyView.
Using GPS collar data, we tested whether habitat selection of plains bison in Grasslands National Park, Canada, was density dependent. Bison selected for areas of high vegetation productivity far from human activity when population density was low and increased use of lower productivity habitat closer to disturbance as density increased.
Michelle L. Sawatzky, Branden T. Neufeld, Stefano Liccioli, Philip D. McLoughlin   +3 more
wiley   +1 more source

Performance of a glider‐mounted multifrequency echosounder for measuring the vertical distribution and abundance of large pelagic copepods

Limnology and Oceanography: Methods, EarlyView.
Abstract The difficulty of sampling zooplankton communities in situ has driven advancements in autonomous, remote sensing technology. The goal of this paper was to perform a gear comparison study testing the performance of one such piece of technology—a glider‐mounted four‐frequency echosounder—against traditional shipboard methods of measuring ...
Delphine Mossman, Joseph D. Warren, Natasha J. Hynes, Kimberley T. A. Davies   +3 more
wiley   +1 more source

Intermittent structural weakening and acceleration of the Thwaites Glacier Tongue between 2000 and 2018

Journal of Glaciology, 2020
Evolving conditions at the terminus of Thwaites Glacier will be important in determining the rate of its future sea-level contribution over the coming decades.
B. W. J. Miles, C. R. Stokes, A. Jenkins, J. R. Jordan, S. S. R. Jamieson, G. H. Gudmundsson   +5 more
doaj   +1 more source

Glacier dynamics near the calving front of Bowdoin Glacier, northwestern Greenland [PDF]

, 2015
To better understand recent rapid recession of marine-terminating glaciers in Greenland, we performed satellite and field observations near the calving front of Bowdoin Glacier, a 3 km wide outlet glacier in northwestern Greenland.
Daiki Sakakibara, Hooke, Mihiro Maruyama, Shin Sugiyama, Shun Tsutaki, Takanobu Sawagaki   +5 more
core   +1 more source

Individual movement modeling expands the power of migratory species observations: North Atlantic right whale case study

Limnology and Oceanography: Methods, EarlyView.
Abstract Understanding a population's distribution depends on observing the presence and movement of individuals throughout their range. For highly mobile marine species, these observations typically rely on high effort monitoring programs. Tracking enough individuals to understand trends in movement behavior is not always logistically feasible, and ...
Abigail M. Kreuser, Daniel E. Pendleton, Nicholas R. Record, Erin L. Meyer‐Gutbrod   +3 more
wiley   +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

A participatory approach to design monitoring indicators of production diseases in organic dairy farms [PDF]

, 2016
Production diseases have an important negative effect on the health and welfare of dairy cows. Although organic animal production systems aim for high animal health levels, compliance with European organic farming regulations does not guarantee that this
Bareille, Nathalie, Duval, Julie, Emanuelson, Ulf, Fourichon, Christine, Madouasse, Aurélien, Sjöström, K.   +5 more
core   +2 more sources