Quantitative relationship between climatic conditions and the conception rate of Japanese Black cattle in commercial cow–calf operations

Kino, Erina; Uematsu, Mizuho; Kitahara, Go; Osawa, Takeshi; Sasaki, Yosuke

doi:10.1016/j.livsci.2019.08.008

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…NGE tended to be lower in winter. Heat stress could affect the estrus cycle and sign in Japanese Black and Holstein cows ( Sakatani et al, 2012 ), and cold stress could also affect fertility and reproductive performance in Japanese Black cows ( Nabenishi and Yamazaki, 2017 ; Kino et al, 2019 ). Because the data were collected in subarctic Hokkaido, cold stress might be dominant in this Japanese Black population.…”

Section: Resultsmentioning

confidence: 99%

Estimation of genetic parameters for superovulatory response traits in Japanese Black cows

Zoda

Urakawa

Oono

et al. 2021

Journal of Animal Science

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The aim of this study was to estimate genetic parameters for superovulatory response traits in order to explore the possibility of genetic improvement in Japanese Black cows. 19 155 records of the total number of embryos and oocytes (TNE) and the number of good embryos (NGE) collected from 1532 donor cows between 2008 and 2018 were analyzed. A two-trait repeatability animal model analysis was performed for both. Because records of TNE and NGE did not follow a normal distribution, the records were analyzed following no, logarithmic, or Anscombe transformation. Without transformation, the heritability estimates were 0.26 for TNE and 0.17 for NGE. With logarithmic transformation, they were 0.22 for TNE and 0.18 for NGE. With Anscombe transformation, they were 0.26 for TNE and 0.18 for NGE. All analyses gave similar genetic correlations between TNE and NGE, ranging from 0.60 to 0.71. Spearman’s rank correlation coefficient between breeding values of cows with more than 10 records was ≥0.95 with both transformations. Thus, the genetic improvement of TNE and NGE of donor cows could be possible in Japanese Black cattle.

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Section: Resultsmentioning

confidence: 99%

Estimation of genetic parameters for superovulatory response traits in Japanese Black cows

Zoda

Urakawa

Oono

et al. 2021

Journal of Animal Science

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“…Possible reasons for this result would be the results of part 1 showing that fewer number of calvings during the Post-FMD period 2. Infrequent calving enables producers to provide more care for individual cows [ 13 ]. The use of ICT devices can reduce the incidence of accidents at calving from 2.2% to 0.3% [ 25 ].…”

Section: Discussionmentioning

confidence: 99%

Change in the incidence of stillbirth in Japanese Black cattle during the animal movement restrictions and suspended insemination

Misaka,

Uematsu,

Kitahara

et al. 2024

PLoS ONE

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We aimed to characterize the change in the incidence of stillbirth (IS) in Japanese Black cattle during and after animal movement restrictions and suspended insemination because of a foot-and-mouth disease (FMD) outbreak in Miyazaki Prefecture in 2010. Calving data from 2006 to 2018 were collected from approximately 900 farms. Post-FMD period was divided into three based on the median IS per month (1.80%): period 1 (May 2011 to February 2013), period 2 (March 2013 to August 2015), and period 3 (September 2015 to December 2018). The ISs were similar during the Pre-FMD period and Post-FMD period 1, then substantially decreased during Post-FMD period 2 (p < .05), before returning to the value before the FMD outbreak period during Post-FMD period 3. Compared with the Pre-FMD period, Post-FMD period 1 was associated with a higher proportion of calvings by primiparous cows and Post-FMD period 2 was associated with a smaller number of calvings per month (p < .05). There were high ISs in primiparous cows during the Pre-FMD period, Post-FMD period 1, and Post-FMD period 3 (p < .05), but not during Post-FMD period 2. In summary, after the animal movement restrictions and suspended insemination introduced because of the FMD outbreak, the IS temporarily decreased and consequently returned to the pre-FMD level.

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“…Because cattle grazing is not performed in this region, the calves were fed roughage such as rice straw, Italian ryegrass, oat straw, and a dietary concentrate twice daily. The average productivity for Japanese Black cattle has been previously reported [ 10 , 11 , 14 , 21 , 27 ].…”

Section: Methodsmentioning

confidence: 99%

Economic loss due to treatment of bovine respiratory disease in Japanese Black calves arriving at a backgrounding operation in Miyazaki

Sasaki

Iki

Anan

et al. 2022

The Journal of Veterinary Medical Science

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The present study assessed the economic loss due to treatment of bovine respiratory disease (BRD) in Japanese Black calves that were introduced to a backgrounding operation from the age of 3 to 4 months until the age of 10 months. The data collected from a backgrounding operation in Miyazaki, Japan included the records of 2,690 animals entering the farm from 2013 to 2018. The treatment duration was defined as the number of days from the beginning to end of treatment. The cost of treatment was defined as the total cost of treatment during the treatment duration. The average incidence of BRD was 54.6%, and the relative frequency of calves that had BRD once, twice, and three or more times until they left the farm was 64.4%, 26.8%, and 8.8%, respectively (total recorded diagnoses of BRD: 2,494). Among the 2,494 recorded diagnoses, the average and median duration of treatment of BRD was 5.9 days and 3.0 days, respectively. The average and median cost of treatment was 7,767 and 5,600 Japanese yen, respectively. A prolonged duration of treatment and high cost of treatment were associated with BRD relapse, steers, and early stage of production (P < 0.05). At the studied farm, the total cost of treatment during the 6-year study period was 19,658,988 yen, and the annual cost was approximately 3 million yen. In summary, the present study showed that BRD had a large economic impact in this backgrounding operation.

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Quantitative relationship between climatic conditions and the conception rate of Japanese Black cattle in commercial cow–calf operations

Cited by 5 publications

References 16 publications

Estimation of genetic parameters for superovulatory response traits in Japanese Black cows

Estimation of genetic parameters for superovulatory response traits in Japanese Black cows

Change in the incidence of stillbirth in Japanese Black cattle during the animal movement restrictions and suspended insemination

Economic loss due to treatment of bovine respiratory disease in Japanese Black calves arriving at a backgrounding operation in Miyazaki

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