Results 81 to 90 of about 8,210 (222)

Strategies For Reducing Age at First Calving in Dairy Animals

, 2023
Raising heifers is one of the most expensive components of the dairy farm operations as they are future of dairy farm. They are produced to replace the older and uneconomical females of the farm through culling. When genetic trends are positive, such replacements help harvest the benefits of genetic gain. Heifer production is most expensive part of the
openaire   +2 more sources

A high‐altitude thermal infrared method for estimating moose abundance and demography in Rocky Mountain National Park, USA

Wildlife Biology, EarlyView.
Resource managers require accurate estimates of large herbivore abundance and demography to maintain ecological integrity. Common methods to count these species, including observations from low altitude helicopter flights, may conflict with other protected area management objectives and struggle to produce precise estimates for more cryptic species. To
Hanem G. Abouelezz, N. Thompson Hobbs
wiley   +1 more source

Genetic improvement of cattle through field progeny testing programme: An evaluation of achievement

Indian Journal of Animal Sciences, 2018
Evaluation of bulls through progeny testing and their extensive use has been a major source of genetic improvement in dairy animals. Adequate numbers of progeny tested bulls are not available in India and whatever small numbers of bulls are progeny ...
A K DAS, RAVINDER KUMAR, S K RATHEE, B PRAKASH, K ANILKUMAR, P P DUBEY, R L BHAGAT, C B SINGH, UMESH SINGH, ARUN KUMAR, S TYAGI, VINEET BHASIN   +11 more
doaj   +1 more source

Micro‐habitat selection by boreal woodland caribou improves access to food

Wildlife Biology, EarlyView.
Bio‐logging sensors attached to radiotelemetry receivers have great potential to transform our understanding of the ecological, physiological, and energetic constraints that shape patterns of wildlife movement under field conditions. We used video camera collars to assess microhabitat selectivity by woodland caribou Rangifer tarandus in boreal forests ...
Ian D. Thompson, Philip A. Wiebe, Arthur R. Rodgers, Douglas Reid, James A. Baker, Brent R. Patterson, Eric McNeill, Romain Dejeante, John M. Fryxell   +8 more
wiley   +1 more source

GENETIC AND PHENOTYPIC TRENDS OF CALVING INTERVAL AND AGE AT FIRST CALVING IN A COMMERCIAL HOLSTEIN HERD [PDF]

Egyptian Journal of Animal Production, 2009
SUMMARY Reproductive records of Holstein cows raised at a commercial farm during the period from 1991 to 2006 were used. A total of 3656 records of 1611 cow daughters of 413 sires and 588 dams were used to study genetic and phenotypic trends of age at first calving (AFC, mo) and calving interval (CI, d).
openaire   +1 more source

DNA metabarcoding reveals wolf dietary patterns in the northern Alps and Jura Mountains

Wildlife Biology, EarlyView.
Understanding predator–prey interactions is crucial for wildlife management and human–wildlife coexistence, particularly in multi‐use landscapes such as western Europe. As wolves Canis lupus recolonize their former habitats, knowledge of their diet is essential for conservation, management and public acceptance.
Florin Kunz, Eduard Mas‐Carrió, Philippine Surer, Fridolin Zimmermann, Philippe Christe, Luca Fumagalli, Nina Gerber   +6 more
wiley   +1 more source

Parturition timing and the pre‐ and post‐partum behaviour of female moose assessed using animal‐borne video and movement‐based approaches

Wildlife Biology, EarlyView.
Limited information on moose calving behaviour, including parturition timing, cow‐calf interactions, and pre‐ and post‐partum movement patterns hinder our ability to define calving phenology and habitat use. GPS‐collars were deployed on 89 female moose over five years, including eight collars equipped with animal‐borne video and environmental data ...
Mikaela Borgeaud LeBlanc, Manuelle Landry‐Cuerrier, Vincent Brodeur, Murray M. Humphries   +3 more
wiley   +1 more source

REDUCING THE AGE AT FIRST CALVING THROUGH NUTRITIONAL MANIPULATIONS IN DAIRY BUFFALOES AND COWS: A REVIEW [PDF]

Pakistan Veterinary Journal, 2007
Raising heifers is the most expensive component of the dairy farm operations. Poor growth rate resulting in delayed age at maturity in our local dairy animals further aggravates the situation.
S. A. BHATTI, M. SARWAR, M. S. KHAN1 AND S. M. I. HUSSAIN
doaj  

Season of birth is associated with first-lactation milk yield in Holstein Friesian cattle

Animal, 2017
The aim of the present research was to assess factors associated with first-lactation milk yield in dairy heifers, including maternal and environmental factors, factors related to the development of the heifer and factors related to its offspring such as
M. Van Eetvelde, M.M. Kamal, L. Vandaele, G. Opsomer   +3 more
doaj   +1 more source

AGE AT FIRST CALVING IN NELORE CATTLE

, 2007
O presente estudo de 118 dados de idade à primeira cria de criação de Nelore da Fazenda Regional de Criação do Ministério da Agricultura, Goiânia - Goiás, mostrou uma média 50,49 +/- 0,90 meses.
Pato, José Magno, Galvão, Francisco Eduardo   +1 more
openaire   +1 more source