Results 11 to 20 of about 971,544 (277)
Impact of age at first calving on reproduction, lactation, postpartum disorders and longevity in Holsteins under Egyptian circumstances [PDF]
Journal of Veterinary Medical Research, 2009 A retrospective study including reproductive and productive data of 1587 primiparous Holstein cows covering a period of eight years. The reproductive data ( interval to 1st service, service period, days open, number of inseminations per conception and ...
M. M. Hussein, A. A. A. El Agawany
doaj +2 more sources
Month and lunar cycle at calving influence and reproductive performance of a tropical buffalo herd
Revista Científica, 2023 A retrospective study (2000-2022) was conducted in a commercial buffalo farm in Mérida State, Venezuela, to assess the effect of month and lunar cycle at calving on some reproductive variables.
José Atilio Aranguren-Méndez +5 more
doaj +1 more source
Trends in milk production, calving rate and survival of cows in 14 Irish dairy herds as a result of the introgression of Holstein-Friesian genes [PDF]
, 2006 peer-reviewedTrends in milk production, calving rates, and survival were monitored on a potential 5580 primiparous and multiparous Holstein-Friesian dairy cows across 14 Irish seasonal spring-calving dairy farms between the years 1990 and 2001. Over this
V. Ducrocq +13 more
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Glacio-limnological interactions at lake-calving glaciers [PDF]
, 2012 Iceberg calving is an efficient ablation process which introduces mechanical instability to glacier systems and can cause non-linear climatic response.
Haresign, Eleanor C.
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Environmental Factors Affecting Some Productive and reproductive Traits in Egyptian Buffaloes [PDF]
Benha Veterinary Medical Journal, 2017 This study was conducted to evaluate the effect of some environmental factors on milk production in Egyptian buffaloesand the effect of parity and season of calving on calving interval and days open.
Darwish A. +3 more
doaj +1 more source
JDS Communications, 2021 Within seasonal dairy systems, cows that calve late in the calving season are less likely to become pregnant and maintain a yearly calving interval. Very few studies have examined effective strategies for reproductive management of these late-calving ...
S.G. Moore +7 more
doaj +1 more source
Animal, 2013 The effects of first calving (FC) in Holstein heifers on their first lactation, second lactation and lifetime milk production were examined from an initial database of 459 743 animals that first calved between 1 January 1990 and 31 July 2010 in Wallonia,
E. Froidmont +5 more
doaj +1 more source
Scientific Papers Animal Science and Biotechnologies, 2023 Is generally known there is antagonistic relationship between production and reproduction traits. We observed this relationship in dataset of 1 197 478 daily milk records of Holstein cows on the first lactation only, first time calved during years 2003 ...
Zuzana Riecka, Juraj Candrák
doaj
Ages at Calving and Calving Intervals for Dairy Cattle in the United States
Journal of Dairy Science, 1989 Abstract Calving ages and intervals for cows first calving in 1966 to 1986 were examined for five dairy cattle breeds. For parities one through seven, mean age at each parity was lowest for Jerseys and highest for Ayrshires and Brown Swiss. Registered cows usually were older than grades for a specific parity.
Nieuwhof, G.J. +2 more
openaire +1 more source
Calving rates at tidewater glaciers vary strongly with ocean temperature [PDF]
, 2015 TerraSAR-X data were provided by DLR (project OCE1503), and funded by the Conoco Phillips-Lundin Northern Area Program through the CRIOS project (Calving Rates and Impact on Sea level). A.L. and S.B.
Luckman, Adrian +14 more
core +1 more source