Factors associated with early and mid-to-late fetal loss in lactating and nonlactating Holstein cattle in a hot climate1

Jousan, Frank Dean; Drost, Maarten R.; Hansen, Per Juel

doi:10.2527/2005.8351017x

Cited by 36 publications

(25 citation statements)

References 19 publications

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“…This difference between heifers and lactating dairy cows in terms of the CR has been reported previously (Santos et al 2004;Jousan et al 2005;De Vries and Risco 2005). This result was possibly related to the high feed intake that occurs in lactating dairy cows (López-Gatius et al 2002;Sartori et al 2002).…”

Section: Discussionsupporting

confidence: 52%

“…Our PL values for lactating cows after single first inseminations were among values given for lactating dairy cows while that for heifers was relatively higher when compared to that for dairy heifers. The age and lactation status are the most likely to have caused the difference in fetal loss between cows and heifers (Mayne et al 2002;De Vries and Risco 2005;Refsdal 2007;Jousan et al 2005).…”

Section: Discussionmentioning

confidence: 99%

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Conception of Jersey cattle in Turkey

Soydan

Ocak

Önder

2008

Trop Anim Health Prod

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To determine the effects of insemination season (IS; dry: May through October and rainy: November through April), lactation number (LN; heifers, primiparous or multiparous) and their interaction on non-return rate (NRR), conception rate (CR) to first-service and pregnancy loss (PL) of Jersey cattle in Turkey, over 1468 lactation records from 510 Jersey dairy cows were used. There was an interaction between LN x IS on NRR, CR to first-service (p < 0.01) and PL (p < 0.05). The NRR and CR to first-service of heifers inseminated during dry season and of primiparous inseminated during rainy season were higher (p < 0.01) than that of multiparous inseminated during both season. The NRR and CR of heifers and primiparous were higher (p < 0.05) than that of multiparous cows. The insemination of heifers during rainy season and of primiparous and multiparous during dry season increased (p < 0.01) the PL compared to the inseminations of heifers during dry season and of primiparous during rainy season. The PL was lower (p < 0.05) in primiparous than multiparous cows. The results demonstrate that the heifers have high fertility than the lactating, especially multiparous and that IS appeared to have a measurable impact on traits relating to conception of Jersey cattle in the each LN.

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Section: Discussionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 99%

Conception of Jersey cattle in Turkey

Soydan

Ocak

Önder

2008

Trop Anim Health Prod

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“…Rendahnya nilai NRR diduga akibat terjadinya kematian embrio dini yang disebabkan karena sebagian ternak yang digunakan sebagai indukan sedang dalam fase menyusui dan tidak dipisahkan dari pedetnya, hal tersebut berdampak pada tidak terjadinya implantasi di dalam uterus, hal tersebut sesuai dengan pendapat Jousan et al (2005) menyatakan bahwa kematian embrio dini banyak terjadi pada ternak-ternak yang sedang menyusui, disebabkan oleh terhambatnya proses implantasi fetus di dalam endometrium induk dikarenakan rendahnya jumlah hormon steroid dalam tubuh induk.…”

Section: Non Return Rate (Nrr)unclassified

Reproductive Performances of Sumba Ongole Cows Inseminated With Frozen Belgian Blue Semen

et al. 2017

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INTISARITujuan dari penelitian ini adalah untuk mengetahui kinerja reproduksi dari sapi betina Sumba Ongole (SO) yang diinseminasi buatan (IB) dengan semen beku Belgian Blue (BB). Penelitian ini diharapkan dapat digunakan sebagai acuan dalam pemeliharaan sapi betina khususnya dalam pelaksanaan IB, serta hasil penelitian ini juga dapat digunakan sebagai bahan untuk rujukan atau acuan penelitian-penelitian selanjutnya. Parameter penelitian meliputi tanda-tanda gejala berahi, service per conception ratio (S/C ratio), conception rate (CR), non return rate (NRR), dan lama bunting. Hasil penelitian menunjukan bahwa besar nilai S/C untuk sapi SO 2,60±1,81, besar nilai CR untuk sapi SO yaitu 40%, nilai NRR sebesar 60%, dan lama bunting sapi SO 273,80±4,08. Berdasarkan penelitian yang dilakukan dapat disimpulkan bahwa kinerja sapi betina SO bagus sehingga penggunaan sapi betina SO sebagai indukan untuk disilangkan dengan sapi BB sangat mungkin untuk dilakukan.(Kata kunci: Belgian Blue, Kinerja reproduksi, Sumba Ongole) ABSTRACT PendahuluanSapi Sumba Ongole (SO) merupakan salah satu bangsa sapi yang memiliki potensi yang sangat baik untuk dikembangkan sebagai sapi potong, bila dibandingkan dengan bangsa sapi potong lokal lain di Indonesia karena umur dewasa kelamin 9 -18 bulan, lama berahi 20 -30 jam, siklus berahi 18-26 hari, umur beranak pertama 3,1 -3,2 tahun, dan jarak beranak 17 -19 bulan (Sodiq dan Hidayat, 2014). Di sisi lain, usaha pengembangan sapi potong menggunakan pengembangan sapi potong menggunakan sapi SO masih dirasa cukup lambat dan kurang, sehingga mengakibatkan jumlah populasi ternak sapi lokal yang ada belum dapat memenuhi kebutuhan konsumsi dan kebutuhan daging di Indonesia. Hal ini menyebabkan pemerintah melakukan upaya pemenuhan kebutuhan daging sapi melalui impor. Selain itu, peningkatan taraf perekonomian masyarakat sebesar 6% per tahun dan pertambahan jumlah penduduk sebesar 1,17% per tahun telah menyebabkan kebutuhan konsumsi daging

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“…Using data from 44 dairy operations in Pennsylvania, Heinrichs et al . (2013) estimated a cost of $1803±339 from birth until calving. In the Netherlands, Mohd Nor et al .…”

Section: Introductionmentioning

confidence: 99%

An empirical analysis of the cost of rearing dairy heifers from birth to first calving and the time taken to repay these costs

Boulton

Rushton

Wathes

2017

Animal

136

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Rearing quality dairy heifers is essential to maintain herds by replacing culled cows. Information on the key factors influencing the cost of rearing under different management systems is, however, limited and many farmers are unaware of their true costs. This study determined the cost of rearing heifers from birth to first calving in Great Britain including the cost of mortality, investigated the main factors influencing these costs across differing farming systems and estimated how long it took heifers to repay the cost of rearing on individual farms. Primary data on heifer management from birth to calving was collected through a survey of 101 dairy farms during 2013. Univariate followed by multivariable linear regression was used to analyse the influence of farm factors and key rearing events on costs. An Excel spreadsheet model was developed to determine the time it took for heifers to repay the rearing cost. The mean±SD ages at weaning, conception and calving were 62±13, 509±60 and 784±60 days. The mean total cost of rearing was £1819±387/heifer with a mean daily cost of £2.31±0.41. This included the opportunity cost of the heifer and the mean cost of mortality, which ranged from £103.49 to £146.19/surviving heifer. The multivariable model predicted an increase in mean cost of rearing of £2.87 for each extra day of age at first calving and a decrease in mean cost of £6.06 for each percentile increase in time spent at grass. The model also predicted a decrease in the mean cost of rearing in autumn and spring calving herds of £273.20 and £288.56, respectively, compared with that in all-year-round calving herds. Farms with herd sizes⩾100 had lower mean costs of between £301.75 and £407.83 compared with farms with <100 milking cows. The mean gross margin per heifer was £441.66±304.56 (range £367.63 to £1120.08), with 11 farms experiencing negative gross margins. Most farms repaid the cost of heifer rearing in the first two lactations (range 1 to 6 lactations) with a mean time from first calving until breaking even of 530±293 days. The results of the economic analysis suggest that management decisions on key reproduction events and grazing policy significantly influence the cost of rearing and the time it takes for heifers to start making a profit for the farm.

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Factors associated with early and mid-to-late fetal loss in lactating and nonlactating Holstein cattle in a hot climate1

Cited by 36 publications

References 19 publications

Conception of Jersey cattle in Turkey

Conception of Jersey cattle in Turkey

Reproductive Performances of Sumba Ongole Cows Inseminated With Frozen Belgian Blue Semen

An empirical analysis of the cost of rearing dairy heifers from birth to first calving and the time taken to repay these costs

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