Log in

Relevant bibliographies by topics / COWs

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Academic literature on the topic 'COWs'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 July 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'COWs.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "COWs"

1

Sintya Kumalasari Wibowo, Pudji Srianto, Dian Ayu Permatasari, Dadik Raharjo, Rimayanti, and Erma Safitri. "Friesian Holstein (FH) Dairy Cows Milk Quality that Experienced Repeated Breeding in Sendang District, Tulungagung Regency." Jurnal Agro Veteriner 7, no. 2 (June 28, 2024): 84–90. http://dx.doi.org/10.20473/agrovet.v7i2.57624.

Full text

Abstract:

This study observe the milk quality decrease in Friesian Holstein (FH) dairy cows that experience repeated breeding (repeat breedings) at KUD Tani Wilis Sendang Tulungagung when viewed from density, fat content, Total Solid (TS), and Solid Non Fat (SNF). The milk samples to be used in this study were 32 with a ratio of 10 normal cow's milk samples as a control. The milk sample was examined using a lactoscan. The data obtained were analyzed using the Independent T-Test test. The results of the repeat breeding cow's milk samples for specific gravity, fat content, and Total Solids (TS) showed a significant difference (p <0.05) between the treatment group and the control of normal cow's milk. Samples of repeat breeding cow's milk on Solid Non Fat (SNF) showed that it was not significantly different (p>0.05). The average specific gravity of repeat breeding cows was 1.0282 and that of normal cow's milk was 1.0260, which means that there is an increase in repeat breeding cow's milk when compared to normal cow's milk. The fat content of repeat breeding cows was 1.08% and that of normal cows was 4.18%. Total Solid (TS) of repeat breeding cows was 9.38% and normal cows was 12.73%.

APA, Harvard, Vancouver, ISO, and other styles

2

Hasegawa, K., S. Takahashi, S. Akagi, K. Takeda, K. Imai, M. Shimizu, T. Okazaki, S. Abe, and Y. Izaike. "39 BOVINE SOMATIC CELL NUCLEAR TRANSFER USING CUMULUS - OOCYTE COMPLEXES COLLECTED FROM THE IDENTICAL INDIVIDUAL BY OVUM PICKUP." Reproduction, Fertility and Development 19, no. 1 (2007): 138. http://dx.doi.org/10.1071/rdv19n1ab39.

Full text

Abstract:

We previously produced a cloned calf by nuclear transfer (NT) using cumulus cells removed from cumulus–oocyte complexes (COCs) after IVM. If both cumulus cells and oocytes are obtained identically and individually, and can be used simultaneously for NT, the production of cloned cows will be more expedient. And the cloned offspring produced from them will not exhibit the heteroplasmic mixed mtDNAs of donor cells and recipient oocytes. In this study, we examined the developmental potential of NT embryos using cumulus–oocyte complexes (COCs) collected from cows individually by ovum pickup (OPU). The cumulus cells were removed from COCs after IVM. The cumulus cells and cumulus-free MII oocytes derived from the same cow were used as donor nuclei and recipient oocytes, respectively. NT was performed as previously described (Akagi et al. 2003 Clon Stem Cells 5, 101–108). In Experiment 1, we examined the in vitro development of NT embryos using COCs collected by OPU. The aspiration of the follicles was performed once a week consecutively for 6 weeks in 6 cows (Cows A, B, C, D, E, and F) without hormone stimulation. In Experiment 2, we examined fetal development after the transfer of NT embryos. A Japanese black cow (Cow G) was used for OPU. On Day 7, 13 NT blastocysts were transferred to 7 recipient cows. The mtDNA genotypes of the donor cow and the cloned calf were analyzed by PCR-mediated single-strand conformation polymorphism analysis as previously described (Takeda et al. 2003 Mol. Reprod. Dev. 64, 429–437). The results of Experiment 1 are summarized in Table 1. Fusion rates did not differ among individual cows. However, the developmental rates of NT embryos at the blastocyst stage varied widely among individual cows, with a range of 19 to 64%. In Experiment 2, 2 of 7 recipient cows became pregnant on Day 30. One pregnant cow aborted on Day 60, and another cow calved a healthy calf. The mtDNA genotype of the cloned calf was confirmed to be identical with that of the donor cow. These results indicate that COCs from an identical individual can be used as donor nuclei and recipient oocytes for NT in order to produce female clones with the same mtDNA as that of the donor cow. Table 1.In vitro development of NT embryos using COCs collected by OPU

APA, Harvard, Vancouver, ISO, and other styles

3

Soonberg, Maria, Tanel Kaart, and David Richard Arney. "How does changing the feeding bin affect cows’ behaviour?" Journal of Dairy Research 86, no. 1 (February 2019): 43–47. http://dx.doi.org/10.1017/s0022029919000050.

Full text

Abstract:

AbstractIn a system in which cows are grouped and given differential access to feeding bins with different rations, and where these groups change over time, it is important to find out how a change in the ration (and hence feeding bin) affects the cow's feeding behaviour. Monitoring the locomotion of cows can be used to predict oestrus and improve health (lameness diagnosis), but activity monitors can also be used to estimate both activity and numbers of feeding visits by cows. Ice tag activity monitors were attached to the right hind legs of ten cows. Walking, standing, lying data and health records were used to record changes before and after a change in each cow's feeding bin. Results comparing activity before and after feeding bin change revealed significant increases in motion index, number of steps taken per minute and number of lying bouts per minute (all P < 0.001). Comparing the behaviours of cows subsequently followed during the dry period showed significant differences in motion indices and number of steps taken per minute (P < 0.001) in the dry period. The results indicate that cows are affected by feeding bin change and group change, which can lead to an increase in behaviour associated with the stress response, especially in heifers.

APA, Harvard, Vancouver, ISO, and other styles

4

Chalmers, J. S., R. F. Veerkamp, H. Parkinson, R. McGinn, G. Simm, and J. D. Oldham. "Genotype by diet and lactation interactions for yield, dry matter intake, condition score and liveweight in dairy cows." Proceedings of the British Society of Animal Science 1997 (1997): 39. http://dx.doi.org/10.1017/s1752756200594800.

Full text

Abstract:

Performance characteristics of high genetic merit cows on different feeding systems are not only important to establish the biological and economic consequences of current genetic selection practices, but can be used also to establish ‘standards’ which will be helpful to people who want to develop breeding, management or feeding strategies for high genetic merit cows. Whereas the performance of high and average genetic merit cows on two different feeding systems has been presented before (Veerkamp et al. 1995), the aim of this study is to define if some of the advantages of high genetic merit cows persist throughout the first three lactations of a cow's lifetime.

APA, Harvard, Vancouver, ISO, and other styles

5

Poulton, P. J. "Clinical findings from 218 downer cow cases in dairy cows from Gippsland, Australia." Livestock 25, no. 2 (March 2, 2020): 66–71. http://dx.doi.org/10.12968/live.2020.25.2.66.

Full text

Abstract:

218 downer dairy cow cases under commercial farming operations in South Gippsland, Australia were investigated. The likely cause of the initial recumbency, evidence of secondary damage and the conditions under which they were cared for were recorded to analyse the relationships between primary cause, secondary damage, nursing care and outcome. 69 (32%) cows eventually recovered and of the 149 (68%) cows that did not recover it was judged by the researcher that 108 (72%) cows did not recover solely from the secondary damage that they sustained after becoming recumbent. ‘Clinically important’ secondary damage was recorded in 173 (79%) cows, which increased the risk of non-recovery by approximately three times (RR=3.33; 95% CI 2.36–4.68). 151 (69%) cows had been nursed ‘satisfactorily’ and 67 (31%) cows were nursed ‘unsatisfactorily’. The relative risk of developing clinically important secondary damage for cows nursed ‘unsatisfactorily’ was 1.23 (95% CI 1.09-1.38) and for non-recovery was approximately sevenfold greater (RR=7.21; 95% CI 2.74–18.98) when compared with those cows nursed ‘satisfactorily’. When veterinarians attend downer cows it is important that they carefully look for secondary damage and actively engage in the cow's nursing care rather than just focusing on the primary cause of the recumbency.

APA, Harvard, Vancouver, ISO, and other styles

6

Steensels, Machteld, Ephraim Maltz, Claudia Bahr, Daniel Berckmans, Aharon Antler, and Ilan Halachmi. "Towards practical application of sensors for monitoring animal health: the effect of post-calving health problems on rumination duration, activity and milk yield." Journal of Dairy Research 84, no. 2 (May 2017): 132–38. http://dx.doi.org/10.1017/s0022029917000176.

Full text

Abstract:

Three sources of sensory data: cow's individual rumination duration, activity and milk yield were evaluated as possible indicators for clinical diagnosis, focusing on post-calving health problems such as ketosis and metritis. Data were collected from a computerised dairy-management system on a commercial dairy farm with Israeli Holstein cows. In the analysis, 300 healthy and 403 sick multiparous cows were studied during the first 3 weeks after calving. A mixed model with repeated measurements was used to compare healthy cows with sick cows. In the period from 5 d before diagnosis and treatment to 2 d after it, rumination duration and activity were lower in the sick cows compared to healthy cows. The milk yield of sick cows was lower than that of the healthy cows during a period lasting from 5 d before until 5 d after the day of diagnosis and treatment. Differences in the milk yield of sick cows compared with healthy cows became greater from 5 to 1 d before diagnosis and treatment. The greatest significant differences occurred 3 d before diagnosis for rumination duration and 1 d before diagnosis for activity and milk yield. These results indicate that a model can be developed to automatically detect post-calving health problems including ketosis and metritis, based on rumination duration, activity and milk yield.

APA, Harvard, Vancouver, ISO, and other styles

7

P, Matubber, Sarker A, Roy A, Biswas D, and Paul AK. "Effects of ovarian phase on oocyte quality in cows." Bangladesh Veterinarian 40, no. 1-2 (January 24, 2024): 1–7. http://dx.doi.org/10.3329/bvet.v40i1-2.71112.

Full text

Abstract:

The effect of ovarian phase on oocyte quality in slaughterhouse material of cows was studied. Cumulus-oocyte complexes (COCs) were aspirated from all visible follicles. COCs were graded on the number and intensity of the cumulus cells and the homogeneity of the ooplasm as A (4 – 5 layers compact cumulus with a homogeneous ooplasm), B (1 - 2 layers compact cumulus with homogeneous ooplasm having a coarse appearance), C (slightly expanded cumulus with irregular cluster ooplasm), and D (denuded oocyte or expanded cumulus, irregular ooplasm). The overall aspiration rate of COCs was 37.2%. The aspiration rate was significantly higher (P<005) in follicular (41.2%) than in luteal phase (28.6%). The percentage of grade A and B oocytes was significantly (P<005) higher in the follicular phase (20.4 and 28.6%) than luteal phase (11.1 and 22.2%). The proportion of grade A COCs in the indigenous cows was significantly (P<005) higher (29.0%) than in crossbred cows (8.3%). Ovaries with diameter of 2.0 cm or more had higher proportion (P<005) of grade A and B COCs than others. It is suggested that follicular phase of the sexual cycle had significant effect on COCs quality. Bangl. vet. 2023. Vol. 40, No. 1-2, 1–7

APA, Harvard, Vancouver, ISO, and other styles

8

Pacheco, Rangel F., Andrei R. Mayer, Marcos A. B. Vaz, Luciana Pötter, Jonatas Cattelam, Álisson M. Callegaro, Luiz Angelo D. Pizzuti, Ivan L. Brondani, Dari C. Alves Filho, and Paulo S. Pacheco. "Qualitative characteristics of meat from cull cows of different genotypes and age class slaughter under different finishing systems: a meta-analytic approach." Anais da Academia Brasileira de Ciências 87, no. 2 (June 2015): 1083–93. http://dx.doi.org/10.1590/0001-3765201520140353.

Full text

Abstract:

The aim of this study was to evaluate, by meta-analysis, the quality of the meat of the cows according to genotype, termination system and age class slaughter. During an online research were identified 15 articles with information related to meat quality of slaughtered cows. The data were grouped according of the genotype of cows being: zebu or continental defined, crossed zebu x british or zebu x continental; according to termination system: feedlot or grassland; according to age of slaughter, where: up to 4 years old (young), 4-8 years old (adult) or more than 8 years old (old). The meat of the continental crossbred cows was softer than the other genotypes, both panel of evaluators and by Shear. The meat of cows finished in feedlot showed higher marbling degree in relation to meat of females finished on grassland. The reduction of the slaughter age of cows improved the meat color. The cow's genotype affects the organoleptic aspects of meat while the finished system and slaughter age affects the sensory aspects of meat.

APA, Harvard, Vancouver, ISO, and other styles

9

Deniz, Matheus, Karolini Tenffen de Sousa, Isabelle Cordova Gomes, Marcos Martinez do Vale, and João Ricardo Dittrich. "Classification of environmental factors potentially motivating for dairy cows to access shade." Journal of Dairy Research 88, no. 3 (July 9, 2021): 274–77. http://dx.doi.org/10.1017/s0022029921000509.

Full text

Abstract:

AbstractThe aim of this Research Communication was to apply the data mining technique to classify which environmental factors have the potential to motivate dairy cows to access natural shade. We defined two different areas at the silvopastoral system: shaded and sunny. Environmental factors and the frequency that dairy cows used each area were measured during four days, for 8 h each day. The shaded areas were the most used by dairy cows and presented the lowest mean values of all environmental factors. Solar radiation was the environmental factor with most potential to classify the dairy cow's decision to access shaded areas. Data mining is a machine learning technique with great potential to characterize the influence of the thermal environment in the cows' decision at the pasture.

APA, Harvard, Vancouver, ISO, and other styles

10

Brodziak, Aneta, Joanna Barłowska, Jolanta Król, and Zygmunt Litwińczuk. "Effect of Breed and Feeding System on Content of Selected Whey Proteins in Cow's Milk in Spring-Summer and Autumn-Winter Seasons." Annals of Animal Science 12, no. 2 (March 1, 2012): 261–69. http://dx.doi.org/10.2478/v10220-012-0022-6.

Full text

Abstract:

Effect of Breed and Feeding System on Content of Selected Whey Proteins in Cow's Milk in Spring-Summer and Autumn-Winter SeasonsThe objective of the present study was to evaluate the effect of breed and feeding system on the content of selected whey proteins in cow's milk collected in the spring-summer and autumn-winter periods. A total of 2,278 milk samples from Black- and Red-and-White variety of Polish Holstein-Friesian cows and Simmental and Jersey cows were examined. In each sample the content of selected whey proteins, i.e. alpha-LA, beta-LG, lactoferrin, BSA and lysozyme, was analysed by RP-HPLC method. Evaluation of the simultaneous effect of breed and production season on whey protein content showed significant interactions (P≤0.05 and P≤0.01) for all analysed whey proteins. The milk of Simmental cows kept in the conventional system was characterized by a higher content of whey proteins (with the exception of BSA), in comparison to the cows managed under TMR system. Furthermore, for most of the evaluated components, except the content of BSA and lysozyme and the alpha-LA/beta-LG ratio, the simultaneous effect of feeding system and production season was also found.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "COWs"

1

Clark, Gabriel Willis. "An Economic Evaluation of Winter-feeding Strategies for Lactating Organic Dairy Cows Utilizing Different Forage and Concentrate Feeding Systems in Maine." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/ClarkGW2009.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Chan, Christina. "Cash, cows, and conservation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0032/MQ66937.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Kinjet, Marc Philip. "Methane production from cows." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273714.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Renfrow, Crystal. "Keeping Dairy Cows Cool." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/622379.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Jackson, D. A. "The voluntary intake of silage by individual dairy cows housed in groups." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233176.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Husted, James Ross. "Bacterial and fungal organisms in the vagina of normal cows and cows with vaginitis." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/1310.

Full text

Abstract:

Bacterial and fungal culturing was conducted on samples taken from the vaginal fornix of 106 cows, of which 42 had vaginitis and 64 had normal vaginas. The diagnosis of vaginitis and non-vaginitis samples was determined by histologic examination. Aerobic, anaerobic, and microaerophilic cultures were done. In addition, cultures were performed for Campylobacter sp., Ureaplasma sp., Mycoplasma sp., Tritrichomonas foetus, and fungi. All 106 samples contained mixed aerobic bacterial cultures. The more frequent aerobic isolates included Acinetobacter lwoffii, Arcanobacterium pyogenes, Escherichia coli, Corynebacterium spp., and Streptococcus spp. These organisms were isolated from both groups of cows, but more frequently from the vaginitis group. Anaerobic isolates included Peptostreptococcus spp., Prevotella spp., and Fusobacterium spp. The fungal isolates included Aspergillus sp., Mucor sp., and Penicillium sp.

APA, Harvard, Vancouver, ISO, and other styles

7

Hill, Scott L. "Serum and plasma metabolites and insemination timing associated with greater pregnancy risk in suckled beef cows subjected to artificial insemination programs." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/34458.

Full text

Abstract:

Doctor of Philosophy
Department of Animal Sciences and Industry
Jeffrey S. Stevenson
Four experiments were conducted in beef cows to determine factors that increased the probability of pregnancy per AI when cows are inseminated by appointment. Cows in all experiments were inseminated after a 7-d CO-Synch + CIDR program (100 μg GnRH [2 mL Factrel, Pfizer Animal Health, Whitehouse Station, NJ] 7 d before 25 mg PGF₂[subscript]α [d 0; 5 mL Lutalyse; Pfizer Animal Health]). Experiment 1 compared 1 vs. 2 inseminations and GnRH injection times at 60 and 75 h after the CO-Synch + CIDR program. Delaying AI until 75 h, according to interpretation of estrus-detection patches, for cows not in estrus by 60 h after CIDR insert removal increased (P < 0.05) pregnancy risk (PR) compared with cows not in estrus and inseminated at 60 h (51.4 vs. 41.7%), respectively. The necessity of GnRH injection concurrent with AI was tested in experiment 2. Cows displaying estrus by 65 h that were injected with GnRH had similar PR to cows in estrus and not treated with GnRH (61.9 vs. 60.4%), respectively. Cows in experiment 2 that did not display estrus, but were treated with a GnRH injection at 65 h and then inseminated at 84 h after CIDR insert removal had increased PR compared with similar cows not treated with GnRH (33.4 vs. 15.0%; P < 0.01), respectively. Experiments 3 and 4 were observational studies conducted to determine if blood metabolites glucose and beta-hydroxy butyrate (BHB experiment 3), or physical body and blood metabolites, (glucose, BHB, non-esterified fatty acids [NEFA], blood urea nitrogen [BUN], body weight, rump fat [RF], or BCS; experiment 4) were indicative of future reproductive success in suckled beef cows enrolled in a timed AI program. In experiment 3, plasma glucose concentration 10 d before AI was lesser (P = 0.01; 52.2 vs. 56.9 mg/dL) and serum BHB concentration was lesser (P < 0.01) in cows that became pregnant 35 d after timed AI than for cows that did not become pregnant (600 vs. 690 μM), respectively. Experiment 4 identified relationships between indicators and reproductive success including the finding that serum NEFA concentration 2 to 4 wk before AI is negatively correlated (P < 0.05) with PR to AI.

APA, Harvard, Vancouver, ISO, and other styles

8

Hecheimi, Khaled Muhuddine. "Protein feeding for dairy cows." Thesis, Bangor University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239933.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Alam, M. G. S. "Stress and reproduction in cows." Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304744.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Phipps, Kristen Renee. "'Till the Cows Come Home." The Ohio State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1618747544530061.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "COWs"

1

Diemer, Lauren. Cows. New York: Weigl Publishers, 2011.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Carr, Aaron. Cows. New York, NY: AV2 by Weigl, 2014.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

3

William, Muñoz, ed. Cows. Mankato, Minn: Bridgestone Books, 1996.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

4

Bédoyère, Camilla De la. Cows. Mankato, Minn: QEB Pub., 2011.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

5

Meister, Cari. Cows. Minneapolis, MN: Jump!, 2012.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

6

Puccio, Frank. Cows. Danbury, CT: Grolier Educational, 1997.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

7

McDonald, Mary Ann. Cows. [Plymouth, MN]: Child's World, 1998.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

8

Rebman, Renée C. Cows. Tarrytown, NY: Marshall Cavendish Benchmark, 2009.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

9

Minden, Cecilia. Cows. Ann Arbor, Mich: Cherry Lake Pub., 2009.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

10

Rebman, Renée C. Cows. Tarrytown, NY: Marshall Cavendish Benchmark, 2009.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Book chapters on the topic "COWs"

1

McNeill, Patrick. "Sacred Cows." In Society Today 2, 87–89. London: Macmillan Education UK, 1991. http://dx.doi.org/10.1007/978-1-349-12065-9_29.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Prandi, Davide, and Paola Quaglia. "Stochastic COWS." In Service-Oriented Computing – ICSOC 2007, 245–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-74974-5_20.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Kuchment, Anna. "Cows and Chickens." In The Forgotten Cure, 101–8. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0251-0_10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Ahuja, Juhi. "Protecting holy cows." In Vigilantism against Migrants and Minorities, 55–68. Abingdon, Oxon; New York, NY : Routledge, 2019. | Series: Routledge studies in fascism and the far right: Routledge, 2019. http://dx.doi.org/10.4324/9780429485619-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Walther, Sundhya. "Making Cows Live." In Animal Remains, 185–200. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003129806-14.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Elder, Alexis M. "Humans Aren’t Cows." In Friendship, Robots, and Social Media, 139–61. 1 [edition]. | New York : Routledge, 2018. | Series: Routledge research in applied ethics ; 9: Routledge, 2017. http://dx.doi.org/10.4324/9781315159577-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Woodforde, John. "Cows without Cowhouses." In Farm Buildings, 22–28. London: Routledge, 2023. http://dx.doi.org/10.4324/9781003416050-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Kunkel, Mark A. "Cows, Milk, and Milking." In Allegories for Psychotherapy, Teaching, and Supervision, 57–70. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95927-6_5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Valpey, Kenneth R. "Cows in Contested Fields." In Cow Care in Hindu Animal Ethics, 53–107. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-28408-4_3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Weerasinghe, C. A., E. Warrakah, S. Shuman, and R. Wang. "Luprostiol in Dairy Cows." In ACS Symposium Series, 217–33. Washington, DC: American Chemical Society, 1992. http://dx.doi.org/10.1021/bk-1992-0503.ch015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "COWs"

1

Anđelić, Biljana, Radojica Đoković, Marko Cincović, and Mira Majkić. "Influence of environmental factors and biological characteristics of cows on the fatty acid groups and nutritional index of raw milk." In Zbornik radova 26. medunarodni kongres Mediteranske federacije za zdravlje i produkciju preživara - FeMeSPRum. Poljoprivredni fakultet Novi Sad, 2024. http://dx.doi.org/10.5937/femesprumns24001a.

Full text

Abstract:

Cow's milk contains a large number of fatty acids, some of which may be of potential benefit to human health. The aim of this research is to determine the most important biological and ecological factors that influence the fatty acid composition and nutritional indices of raw milk originating from cows in intensive farm production. Comparing to reference cows, next animals had significantly higher odds of having greater SFA concentrations and lower odds of being in the categories with higher MUFA, PUFA and UFA and concentrations in milk: cows in 2nd and 3rd lactation compared to 1st, cows in mid and late lactation compared to early, cows in heat stress compared to cows in thermoneutral period. Comparing to reference cows, cows with higher BHB had significantly lower odds of having greater SFA concentrations and higher odds of being in the categories with higher MUFA. Also, cows with higher NEFA had significantly lower odds of having greater SFA concentrations and higher odds of being in the categories with higher PUFA. In experimental group compared to reference we found lower odds of having greater nutrition index of milk. Odds to have higher nutrition index increase in cows with intense ketogenesis and lipolysis. In conclusion, older cows, cows in an advanced stage of lactation and cows in heat stress have higher values of SFA, while cows with higher lipolysis and ketogenesis have higher contents of MUFA, PUFA and UFA, which leads to a change in the nutritional indices of raw milk.

APA, Harvard, Vancouver, ISO, and other styles

2

CIELAVA, Lāsma, Solvita PETROVSKA, Daina JONKUS, and Līga PAURA. "THE EFFECT OF DIFFERENT BLOODINESS LEVEL ON LATVIAN BROWN COW PRODUCTIVITY." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.038.

Full text

Abstract:

Latvian brown (LB) cow breed is economically most important livestock breed in Latvia. In last 5 years in Latvian farms rapidly increases Holstain black and white cow population, however LB breed cows is more resistant against environment and climate changes than relatively new Holstain breed cows. More resistant is genetic resource LB cows. In study was observed data from Latvian Agriculture data center about Latvian brown (LB) cows with different breed blood admixture. Cows, included in data base was born in time period from 2003–2007 year and closed at least 1 full lactation. The aim of the study was to determine how different amount of Latvian brown cow bloodiness affects cow productivity and longevity. Latvian brown cow milk yield significantly lower (p<0.05) was in first lactation (4826.1 kg), but it increased until fifth lactation (5891.8 kg). Opposite situation was occurred with milk dry matter content, milk fat content significantly higher was in first lactation, but until 5th lactation it decreased by 0.84%, similar situation was occurred with milk protein content. Significantly highest milk yield grouped by dominant breed bloodines was observed in group with Brown Swiss bloodiness (4887.3 ± 26.3 kg; p<0.05), but highest protein content in genetic resources group (4.31 ± 0.02 %). Average lifespan in LB cow population was 2463.0 days (in average 6.7 years or about 5 lactations.

APA, Harvard, Vancouver, ISO, and other styles

3

Kreismane, Dzidra, Elita Aplocina, Kaspars Naglis-Liepa, Laima Berzina, Olga Frolova, and Arnis Lenerts. "Diet optimization for dairy cows to reduce ammonia emissions." In Research for Rural Development 2021 : annual 27th International scientific conference proceedings. Latvia University of Life Sciences and Technologies, 2021. http://dx.doi.org/10.22616/rrd.27.2021.005.

Full text

Abstract:

Feeding livestock a balanced diet with a differentiated crude protein (CP) content, depending on the lactation phase can reduce nitrogen emissions from livestock excrement and urine. A higher content of non-starch polysaccharides in livestock diets improves feed absorption in the livestock body and, consequently, nitrogen is emitted more from protein present in livestock manure than from urea acid present in livestock urine. The aim of the study is to calculate the ammonia emission reduction potential in Latvia by optimizing the feeding of dairy cows and ensuring life longevity, as well as provide justification for ammonia emission reduction in dairy farms. Calculations made by using the NorFor Model for optimization of dairy cow (Bos primigenius f. taurus) diets revealed that compared with lowyielding cows, a higher CP content diet fed to high-yielding cows at the beginning of lactation increased the amount of nitrogen (N) in their excrement and urine by 90–180 g d-1. Reducing the CP content in the cow diet by an average of 10 g kg-1 dry matter (DM) during mid-lactation resulted in the same trend. Reducing the CP content in the cow diet during late lactation and the dry period by another 20–30 g kg-1 of DM, N emissions from excrement and urine significantly decreased. Increasing the lifespan of dairy cows also means reducing ammonia emissions from the farm. By increasing the number of lactations per cow on dairy farm, it is possible to reduce the number of heifers per cow. The total reduction of ammonia emissions in Latvia was calculated based on a long-term projection of a decrease of 0.1 heifer per dairy cow. Ammonia emissions could be reduced by 0.051 kt by decreasing the number of heifers by 12.54 thou. at the planned increase in the lifespan of dairy cows by 2030.

APA, Harvard, Vancouver, ISO, and other styles

4

Dineva, Kristina, and Tatiana Atanasova. "RECOGNISING DAIRY COWS' BEHAVIOUR WITH LSTM MODEL TO IMPROVE FARM MANAGEMENT PRACTICES." In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023v/6.2/s25.43.

Full text

Abstract:

This paper focuses on recognizing the activity of dairy cows using a non-invasive approach that monitors four key behaviors: licking, feeding, standing, and lying. The study used IoT devices with accelerometers and gyroscopes attached to the cow's neck to continuously monitor its movements. The data collection process aimed to capture the dynamic and static nature of dairy cow behaviors, providing a valuable data set for subsequent analysis. To efficiently process the raw data, we analyzed it and then used long short-term memory (LSTM) neural networks, a type of recurrent neural network (RNN) suitable for sequential data processing. The LSTM model was trained on the collected sensor data to recognize and classify the four target activities. The model achieved an accuracy of 96%, indicating its robust ability to accurately identify dairy cow activity. Furthermore, the model consistently maintained a low loss value hovering around 0.25, demonstrating its generalization and predictive performance. This research has important implications for dairy production and animal welfare. Accurate real-time recognition of dairy cow activities can help improve farm management practices, enabling timely interventions when needed.

APA, Harvard, Vancouver, ISO, and other styles

5

Marchiori, Massimo. "Happy Cows, Happy Milk: Smart Cows and Quality Factors." In 2019 IEEE SmartWorld, Ubiquitous Intelligence & Computing, Advanced & Trusted Computing, Scalable Computing & Communications, Cloud & Big Data Computing, Internet of People and Smart City Innovation (SmartWorld/SCALCOM/UIC/ATC/CBDCom/IOP/SCI). IEEE, 2019. http://dx.doi.org/10.1109/smartworld-uic-atc-scalcom-iop-sci.2019.00062.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Krnjaić, Srđan, Radojica Đoković, Miloš Petrović, Mira Majkić, and Jože Starič. "Frequency and its influence on derivative and metabolic characteristics of cows." In Zbornik radova 26. medunarodni kongres Mediteranske federacije za zdravlje i produkciju preživara - FeMeSPRum. Poljoprivredni fakultet Novi Sad, 2024. http://dx.doi.org/10.5937/femesprumns24019k.

Full text

Abstract:

Increasing milking frequency can increase milk production in cows by 15-20%, and increased milking frequency can affect different mechanisms of secretion and metabolic activity of the udder. In practice, cows are best milked twice a day with an average interval between two milkings of 12 hours, and in practice it is the most common range of 8-16 hours. It was shown that a 12-hour interval between two milkings was good for high-yielding cows, with a steady increase in milk production during the first half of lactation. An extended interval between two milkings will lead to inhibition of lactation with a consequent decrease in the amount of milk produced. Increasing the milking frequency of dairy cattle to more than two milkings per day results in an increase in milk production. Milking three times a day leads to an increase in milk production of 3 to 39% compared to milking twice. One of the most obvious effects as a result of increased milking frequency is the mobilization of body reserves. The primary mechanism leading to this is lipolysis. As a result of lipolysis, there is an increase in the concentration of NEFA and BHB in the blood plasma or serum with a decrease in the assessed body condition of the cows, and the mentioned changes are considered a typical response to an increase in milking frequency. The tests showed a significant decrease in the body condition score in cows that were milked six times compared to cows that were milked three times. Increased lipolysis and ketogenesis lead to a metabolic response and adaptation of cows, and these changes can sometimes lead to an increase in metabolic diseases in cow herds.

APA, Harvard, Vancouver, ISO, and other styles

7

Mangalis, Maris, Juris Priekulis, and Mara Mangale. "Studies of performance parameters in milking robots after software improvement." In 22nd International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering, 2023. http://dx.doi.org/10.22616/erdev.2023.22.tf127.

Full text

Abstract:

. Robotic milking of cows began in Latvia in 2007, when it was introduced on two farms, including the training and research farm “Vecauce” of the Latvia University of Biological Sciences and Technology (then the Latvia University of Agriculture). These were the DeLaval VMS robots that are still in use on the farm “Vecauce”. A similar study was carried out already in 2009, but since then DeLaval milking robots have undergone technical and software updates and improvements. Therefore, a comparison of the operation indicators of these robots with the latest model of the same company, VMS V300, was made. Research shows that performing all technical maintenance intended for the VMS robot and replacing the original management system software can ensure successful operation of this robot even after 16 years of use. However, it has difficulties with accurately attaching the milking tubes to the respective cow’s teats. Because of this, the application of tubes is delayed and the average milking time of one cow reaches 8.25 minutes. When milking with the company’s latest generation VMS V300 robot, which uses a 3D camera to connect the milking tubes, the average milking time is only 6.6 minutes. Therefore, we can assume that the robots used on the farm “Vecauce” for milking cows are morally and physically obsolete.

APA, Harvard, Vancouver, ISO, and other styles

8

Welihozkiy, Andrew. "Why cows go moon." In ACM SIGGRAPH 99 Electronic art and animation catalog. New York, New York, USA: ACM Press, 1999. http://dx.doi.org/10.1145/312379.313113.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Ponomarjova, Olga, Ilga Sematovica, Inga Piginka-Vjaceslavova, and Aida Vanaga. "Cattle (Bos Taurus) endometrium morphology on the seventh day of the estrous cycle." In Research for Rural Development 2020. Latvia University of Life Sciences and Technologies, 2020. http://dx.doi.org/10.22616/rrd.26.2020.021.

Full text

Abstract:

The aim of our study was to describe the histopathological and cytological characteristic of the cow endometrium on the seventh day of the estrous cycle. In this study, 11 different breeds’ dairy cows (78.18 ± 37.46 months old, in 3.6 ± 2.17 lactation, the mean body condition score 3.4 ± 0.72 (5 points scale)) from Research and Study farm ‘Vecauce’ were selected. All cows were more than 210 days postpartum. Overall health and reproductive tract examination was performed, progesterone (P4) and estradiol (E2) concentration in blood serum were established and the biopsy and cytology samples of endometrium were taken. Mean E2 concentration was 14.92 ± 7.92 pg mL-1, mean P4 concentration was 13.64 ± 9.44 nmol L-1. The mean percentage in the cytology slides was established: epithelial cells 89 ± 9%, polimorphonuclear leukocytes (PMN) 6 ± 5%. Cytological subclinical endometritis (SE) was confirmed in 5 cows. Histopathological findings (out of 22 samples): endometrium stromal edema in 14, hemosiderin and hemosiderophages in 8, supranuclear vacuolization in 12, pseudodecidual reaction in 12 samples. No subnuclear vacuolization and mitosis in the glandular epithelium were detected. Histopathological examination did not reveal SE. Morphology between the uterine horns with and without corpus luteum (CL) and between cows with serum P4 level higher than 15 nmol L-1 and lower than 15 nmol L-1 were not statistically different (p>0.05). In conclusion, histopatological examination is more reliable diagnostic method for SE. Future investigation should be performed to establish cut-off values for the diagnosis of SE in cows more than 210 days postpartum.

APA, Harvard, Vancouver, ISO, and other styles

10

Đokovic, Radojica, Marko Cincovic, Vladimir Kurćubic, Milun D. Petrovic, Miloš Ži Petrovic, Ljiljana Anđušic, and Biljana Anđelic. "HOMEORETSKA REGULACUJA METABOLIČKIH FUNKCIJA KOD KRAVA U PERIPARTALNOM PERIODU." In SAVETOVANJE o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.235dj.

Full text

Abstract:

The aim of this paper is to describe complex homeoretic and homeostatic mechanisms in dairy cows during the peripartum period. The endocrine system has a key function in regulating the adaptation of metabolism during the peripartum period. Homeoresis represents the functioning of the endocrine system and metabolism in conditions when the organism must primarily provide certain physiological processes, such as fetal growth or lactation. Then the function of all tissues is adjusted to the new situation. Homeoretic hormones (growth hormone, prolactin, glucocorticosteroids, thyroid hormones, insulin, glucagon and leptin) in dairy cows in the peripartum period play a key role in maintaining high lactation and maintaining cow health.

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "COWs"

1

Attanasio, Orazio, and Britta Augsburg. Holy Cows or Cash Cows? Cambridge, MA: National Bureau of Economic Research, July 2014. http://dx.doi.org/10.3386/w20304.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Attanasio, Orazio, and Britta Augsburg. Holy cows or cash cows? Institute for Fiscal Studies, July 2014. http://dx.doi.org/10.1920/wp.ifs.2014.1414.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Bylgaeva, A. A. Influence of cows harvested with probiotics on the microbiota of cows. Издательский центр НГАУ «Золотой колос», 2018. http://dx.doi.org/10.18411/lj636085-2018-8184.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Hansen, Peter J., Zvi Roth, and Jeremy J. Block. Improving oocyte competence in dairy cows exposed to heat stress. United States Department of Agriculture, January 2014. http://dx.doi.org/10.32747/2014.7598163.bard.

Full text

Abstract:

Original Objectives. The overall goal is to develop methods to increase pregnancy rate in lactating dairy cows exposed to heat stress through methods that minimize damage to the oocyte and embryo caused by heat stress. Objectives were as follows: (1) examine the protective effects of melatonin on developmental competence of oocytes exposed to elevated temperature in vitro; (2) test whether melatonin feeding can improve developmental competence of oocytes in vivo and, if so, whether effects are limited to the summer or also occur in the absence of heat stress; and (3) evaluate the effectiveness of improving fertility by facilitating follicular turnover in the summer and winter. Revised Objectives. (1) Examine protective effects of melatonin and follicular fluid on developmental competence of oocytes exposed to elevated temperature in vitro; (2) examine the protective effects of melatonin on developmental competence of embryos exposed to elevated temperature in vitro; (3) evaluate effectiveness of improving fertility by administering human chorionicgonadotropin (hCG) to increase circulating concentrations of progesterone and evaluate whether response to hCG depends upon genotype for four mutations reported to be related to cow fertility; and (4) identify genes with allelic variants that increase resistance of embryos to heat shock. Background. The overall hypothesis is that pregnancy success is reduced by heat stress because of damage to the oocyte and cleavage-stage embryo mediated by reactive oxygen species (ROS), and that fertility can be improved by provision of antioxidants or by removing follicles containing oocytes damaged by heat stress. During the study, additional evidence from the literature indicated the potential importance of treatment with chorionicgonadotropin to increase fertility of heat- stressed cows and results from other studies in our laboratories implicated genotype as an important determinant of cow fertility. Thus, the project was expanded to evaluate hCG treatment and to identify whether fertility response to hCG depended upon single nucleotide polymorphisms (SNP) in genes implicated as important for cow fertility. We also evaluated whether a SNP in a gene important for cellular resistance to heat stress (HSPA1L, a member of the heat shock protein 70 family) is important for embryonic resistance to elevated temperature. Major conclusions, solutions & achievements. Results confirmed that elevated temperature increases ROS production by the oocyte and embryo and that melatonin decreases ROS. Melatonin reduced, but did not completely block, damaging effects of heat shock on the oocyte and had no effect on development of the embryo. Melatonin was protective to the oocyte at 0.1-1 μM, a concentration too high to be achieved in cows. It was concluded that melatonin is unlikely to be a useful molecule for increasing fertility of heat-stressed cows. Treatment with hCG at day 5 after breeding increased first-service pregnancy rate for primiparous cows but not for multiparous cows. Thus, hCG could be useful for increasing fertility in first-parity cows. The effectiveness of hCG depended upon genotype for a SNP in COQ9, a gene encoding for a mitochondrial-function protein. This result points the way to future efforts to use genetic information to identify populations of cows for which hormone treatments will be effective or ineffective. The SNP in HSPA1L was related to embryonic survival after heat shock. Perhaps, genetic selection for mutations that increase cellular resistance to heat shock could be employed to reduce effects of heat stress on fertility. Implications, both scientific and agricultural. This project has resulted in abandonment of one possible approach to improve fertility of the heat-stressed cow (melatonin therapy) while also leading to a method for improving fertility of primiparous cows exposed to heat stress (hCG treatment) that can be implemented on farms today. Genetic studies have pointed the way to using genetic information to 1) tailor hormonal treatments to cow populations likely to respond favorably and 2) select animals whose embryos have superior resistance to elevated body temperatures.

APA, Harvard, Vancouver, ISO, and other styles

5

Strohbehn, Daryl R., W. Darrell Busby, Dennis D. DeWitt, and Perry Beedle. A Summary of Feeding Market Cows for the White Fat Cow Market. Ames (Iowa): Iowa State University, January 2004. http://dx.doi.org/10.31274/ans_air-180814-535.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Hansen, Peter J., and Zvi Roth. Use of Oocyte and Embryo Survival Factors to Enhance Fertility of Heat-stressed Dairy Cattle. United States Department of Agriculture, August 2011. http://dx.doi.org/10.32747/2011.7697105.bard.

Full text

Abstract:

The overall goal was to identify survival factors that can improve pregnancy success following insemination or embryo transfer in lactating dairy cows exposed to heat stress. First, we demonstrated that oocytes are actually damaged by elevated temperature in the summer. Then we tested two thermoprotective molecules for their effect on oocyte damage caused by heat shock. One molecule, ceramide was not thermoprptective. Another, insulin-like growth factor-1 (IGF) reduced the effects of heat shock on oocyte apoptosis and oocyte cleavage when added during maturation. We also used lactating cows exposed to heat stress to determine whether bovine somatotropin (bST), which increases IGF1 levels in vivo, would improve fertility in summer. Cows treated with bST received a single injection at 3 days before insemination. Controls received no additional treatment. Treatment with bST did not significantly increase the proportion of inseminated cows diagnosed pregnant although it was numerically greater for the bST group (24.2% vs 17.8%, 124–132 cows per group). There was a tendency (p =0.10) for a smaller percent of control cows to have high plasma progesterone concentrations (≥ 1 ng/ml) at Day 7 after insemination than for bST-treated cows (72.6 vs 81.1%). When only cows that were successfully synchronized were considered, the magnitude of the absolute difference in the percentage of inseminated cows that were diagnosed pregnant between bST and control cows was reduced (24.8 vs 22.4% pregnant for bST and control). Results failed to indicate a beneficial effect of bST treatment on fertility of lactating dairy cows. In another experiment, we found a tendency for addition of IGF1 to embryo culture medium to improve embryonic survival after embryo transfer when the experiment was done during heat stress but not when the experiment was done in the absence of heat stress. Another molecule tested, granulocyte-macrophage colony-stimulating factor (GM-CSF; also called colony-stimulating factor-2), improved embryonic survival in the absence of heat stress. We also examined whether heat shock affects the sperm cell. There was no effect of heat shock on sperm apoptosis (programmed cell death) or on sperm fertilizing ability. Therefore, effects of heat shock on sperm function after ejaculation if minimal. However, there were seasonal changes in sperm characteristics that indicates that some of the decrease in dairy cow fertility during the summer in Israel is due to using semen of inferior quality. Semen was collected from five representative bulls throughout the summer (August and September) and winter (December and January). There were seasonal differences in ion concentration in seminal plasma and in the mRNA for various ion channels known to be involved in acrosome reactions. Furthermore, the proportion of sperm cells with damaged acrosomes was higher in post-thaw semen collected in the summer than in its counterpart collected in winter (54.2 ± 3.5% vs. 51.4 ± 1.9%, respectively; P < 0.08Further examination is required to determine whether such alterations are involved in the low summer fertility of dairy cows.

APA, Harvard, Vancouver, ISO, and other styles

7

Kilmer, Lee H., Russell Bredahl, and Dallas L. Maxwell. Cows in the Corn Grazing Project. Ames: Iowa State University, Digital Repository, 2001. http://dx.doi.org/10.31274/farmprogressreports-180814-503.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Britt, Jack, Miriam Rosenberg, Steven Washburn, and Moshe Kaim. Development and Evaluation of a Method of Hormonal Treatment to Increase Fertility in Dairy Cows. United States Department of Agriculture, December 1995. http://dx.doi.org/10.32747/1995.7612833.bard.

Full text

Abstract:

The objectives were: 1) to develop a practical method for improving conception rates of dairy cows by administering progesterone during the critical period of the luteal phase prior to first insemination, 2) to determine which cows respond best to such a progesterone treatment, and 3) to determine physiological changes that are associated with this treatment. Experiment 1, conducted in the US and Israel, tested three treatment protocols. Holstein cows: 1) served as controls, 2) received two injections of prostaglanding F2a (PGF) 14 days apart, or 3) received two PGF injections and were inserted with a progesterone releasing intravaginal device (PRID) for 6 days beginning 9 days after the first injection of PGF. Fertility was positively related to plasma progesterone concentations prior to the second PGF injection, but PRID treatment did not improve fertility in cows with low progesterone. Cows in synchronized estrus 2-8 days after the second injection of PGF had higher fertility and better reproductive performance than non-synchronized cows. Experiment 3, conducted in Israel, involved three studies that assessed effect of PRID treatment on: 1) progesterone concentration in ovarian tissue and uterine tissue and fluids, 2) changes in systemic LH and estradiol, and 3) development and function of dominant follicles. Treatment with PRID increased progesterone in uterine tissue and fluid exclusive of effects on systemic concentrations. Low progesterone resulted in persistent follicles that exceeded normal size and produced excessive estrogen. Experiment 4, conducted in the US, evaluated influence of endogenous progesterone on embryo development. Cows were given two injections of PGF 14 days apart and single embryos were recovered 7 days after estrus. Among cyclic cows, there was a linear relationship between progesterone concentration and percentage of cows from which an embryo was recovered. Overall these experiments show that systemic progesterone concentrations affect fertility in high-producing dairy cows through effects on follicular development and embryo survival

APA, Harvard, Vancouver, ISO, and other styles

9

Maxwell, Dennis R. Cornstalk Strip Grazing Demonstration with Beef Cows. Ames: Iowa State University, Digital Repository, 2013. http://dx.doi.org/10.31274/farmprogressreports-180814-1237.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Alekseeva, N. M., P. P. Borisova, V. V. Romanova, and S. I. Zarovniaev. Reproductive ability of Kalmyk cows in Yakutia. Издательский дом "Панорама", 2018. http://dx.doi.org/10.18411/29051967.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!