The effect of some seasonal conditions on oestrus occurrence in cows

Bülbül, Bülent; Ataman, Mehmet Bozkurt

doi:10.5194/aab-52-459-2009

Cited by 5 publications

(3 citation statements)

References 25 publications

(29 reference statements)

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“…However, the same trend was observed in ongoing studies of DHA based on visual inspection of estrus behavior [S. Nyman, S. E. Malm, H. Gustafsson, and B. Berglund (Swedish University of Agricultural Sciences), unpublished data]. Bülbül and Ataman (2009) found that estrus occurrence was less frequent from November to March than from April to October. The same authors found a positive correlation of 0.39 between estrus occurrences and the duration of daylight.…”

Section: Effect Of Month Of Calving On Physical Activity Traitssupporting

confidence: 76%

“…Moreover, days open were longest for cows calving in spring and shortest for fall calvers in US Holsteins (Oseni et al, 2003(Oseni et al, , 2004. In addition, estrus occurrences are less frequent from November to March than from April to October, with a positive correlation of 0.39 between estrus occurrences and hours (duration) of light (Bülbül and Ataman, 2009). Although the previous results indicated that expression of fertility is sensitive to seasonal changes, little research has been done on genotype by environment interaction (G × E) for female fertility within a country.…”

Section: Introductionmentioning

confidence: 96%

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Seasonality of fertility measured by physical activity traits in Holstein cows

Ismael

Strandberg

Berglund

et al. 2016

Journal of Dairy Science

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Seasonality of female fertility traits, including the interval from calving to first high activity (CFHA), duration of high activity episode (DHA), and strength of high activity episode (SHA) of first estrus, were studied. The physical activity traits were derived from electronic activity tags for 20,794 Holstein cows in 135 commercial Holstein herds in Denmark. Data were categorized in 3 ways: (1) into 4 seasons of calving: winter (January-March), spring (April-June), summer (July-September), and fall (October-December); (2) into 2 seasons: a cold season (October-March) and a warm season (April-September); and (3) into an increasing light season (IL; January-June), where daylight hours gradually increased, and a decreasing light season (DL; July-December), where daylight hours gradually decreased. At the phenotypic level, least squares means of CFHA were highest at 55d for cows calving in December and lowest at 31d for cows calving in September. The highest least squares means of DHA and SHA were recorded for cows calving in November and lowest for cows calving in May and June. Genetic parameters for all traits were estimated using average information-REML in a bivariate animal model that treated the same trait in different calving seasons as different traits. Heritability estimates for CFHA were highest for the winter season (0.13) and low for the other seasons (0.03-0.04), whereas heritability estimates for DHA and SHA were lowest for winter and highest for fall. Heritability estimates for CFHA for the cold season (0.17) was higher than that for the warm season (0.10). Heritability estimates of CFHA for the IL season (0.12) was higher than for the DL season (0.07), but the opposite pattern was found for DHA and SHA. Genetic correlations (rA) of CFHA between winter and summer (rA=0.34 ± 0.27), and winter and fall (rA=0.65 ± 0.20) were significantly lower than unity. The corresponding correlations of DHA and SHA between seasons were all close to unity, except for the correlation of SHA between winter and fall (rA=0.36 ± 0.34). When the year was split into only 2 seasons, the genetic correlation of CFHA between cold and warm seasons was only moderate (rA=0.46 ± 0.15) but was slightly stronger between IL and DL seasons (rA=0.63 ± 0.16); both significantly deviated from unity. These results indicate the existence of a genotype by environment interaction for CFHA regardless of calving season classification.

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Section: Effect Of Month Of Calving On Physical Activity Traitssupporting

confidence: 76%

Section: Introductionmentioning

confidence: 96%

Seasonality of fertility measured by physical activity traits in Holstein cows

Ismael

Strandberg

Berglund

et al. 2016

Journal of Dairy Science

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“…These varied responses may have been associated with different proportions of two and three-wave cycles in different populations of cows. In addition, different results obtained in various studies may be influenced by age, nutrition, suckling and season described as Odde (1990) and Bülbül and Ataman (2009).…”

Section: Discussionmentioning

confidence: 99%

The effect of buserelin injection 12 days after insemination on selected reproductive characteristics in cows

Ataman

Erdem

Bülbül³

et al. 2011

Acta Vet. Brno

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The aim of this study was to evaluate the effect of buserelin injection on day 12 postinsemination on fertility in lactating dairy cattle. A total of 57 cows were assigned to two groups and four subgroups. In the treatment group, the cows were synchronized with PGF 2α -PGF 2α (group A) or GnRH-PGF 2α (group B) protocol, and buserelin was injected on day 12 postinsemination. Cows in the control group were synchronized with PGF 2α -PGF 2α (group C) or GnRH-PGF 2α (group D) protocol, saline solution was injected on day 12, and served as controls. Pregnancy rates on day 21 and 45 and embryonic death rates were 85.7%, 71.4% and 16.7%, 85.7%, 85.7% and 0.0%, 73.3%, 62.1% and 27.3% and 85.7%, 71.4% and 16.7% in groups A, B, C and D, respectively. There was no significant difference between synchronization protocols for pregnancy rates, and among groups A, B, C and D for pregnancy rates and embryonic death rates. Mean progesterone concentrations in pregnant cows in groups A and B were higher than that in groups C and D, respectively, on day 18 and 21 (p < 0.05). In conclusion, GnRH injection on day 12 postinsemination increased the plasma progesterone concentrations on day 18 and 21 postinsemination. However, it did not alter the pregnancy rates and prevent embryonic deaths.

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A Six-Decade Review: Research on Cattle Production, Management and Dairy Products in Bangladesh

Samad¹

2020

JVMOHR

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Background: Historical changes in the demand of animal protein sources (milk & meat) for human consumption have been largely increased due to increased growth of human population, income and urbanization in Bangladesh. Research on cattle production and management especially cattle breeding, feeds and fodders, milk production and products have contributed to increase potential production and genetic gains of cattle. A comprehensive review on the published inland research reports on cattle production, management and dairy products are lacking in literature which is required for further research for the cattle development and production. Objectives: An attempt to review on the published inland research reports on the advances in science and technology on cattle production, management and dairy products in Bangladesh Materials and Methods: A systematic literature review of research articles on cattle production, management and dairy products published between 1962 and 2020 from Bangladesh has been reviewed. A total of 1185 research articles on cattle production, management and dairy products supported with some international related articles have been reviewed and analyzed. Results: Research data on cattle production, management and dairy products are compiled from 1185 different research reports supported with some international reports. This review covers the status of cattle breeds and varieties with tabulated summary of 21 reports on draught cattle, 83 on fodder production, 97 on nutrition, feeds and feeding, 88 on trials of different feed formulations in non-dairy cattle and 68 on dairy cattle, 5 on the effects of heat stress on health and production, 39 on fattening of cattle, 27 on genetics and breeding, 75 on semen and AI, 20 on factors associated with conception rate (CR), 8 on oocyte and embryo collection, 9 on genotypes of dairy cows, 7 on management of smallholder dairy farms, 48 on milk production status of dairy cattle, 32 on economics of rearing cattle, 99 on productive and reproductive performances of cattle, 7 on estrus and pregnancy diagnosis, 7 problems of dairy farmers, 23 on preservative and adulteration of milk, 20 on constituents and methods of sweet preparation, 11 on cheese preparation, 9 on ice-cream, 56 on yoghurt, 4 on beef cattle production, 34 on birth weight, and 15 on calf rearing including calf milk replacer and calf starter. Conclusions: Data based reports are important for priority setting and targeting with mandate for cattle development and increase production. Currently, one of the biggest gaps in the inland datasets on cattle research and this review addresses this gap by bringing together in a review and highlighting some of the major findings. Cross-breeding remains an attractive option for cattle improvement because of the quick results that can be obtained by its use and the potential benefits it has farmers. This review would serve as an archive of research reports on cattle production, management and dairy products for the concerned academicians, research scientists, organizations and government for future planning for education, research and extension on cattle production. Keywords: Systematic review, Six decades, Cattle, Management, Production, Dairy products, Bangladesh

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The effect of some seasonal conditions on oestrus occurrence in cows

Cited by 5 publications

References 25 publications

Seasonality of fertility measured by physical activity traits in Holstein cows

Seasonality of fertility measured by physical activity traits in Holstein cows

The effect of buserelin injection 12 days after insemination on selected reproductive characteristics in cows

A Six-Decade Review: Research on Cattle Production, Management and Dairy Products in Bangladesh

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