Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
4.2
3.0
Journals
Animals
Special Issues
Reproduction in Dairy Cattle
share announcement

Reproduction in Dairy Cattle

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Animal Reproduction".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 8536

Special Issue Editor

Dr. Emma Bleach

E-Mail Website
Guest Editor
Agriculture and Environment Department, Harper Adams University, Newport TF10 8NB, UK
Interests: dairy cow; follicle; oestrus; calf; growth; health; endocrine; ultrasound

Special Issue Information

Dear Colleagues

Reproduction is fundamental to efficient dairy production. Poor reproductive performance is a cost, and, despite much research activity in this area, overcoming this remains one of the key challenges faced by dairy producers today. There are many factors that influence the reproductive process in dairy cows. Among these are nutrition, level of milk production, housing and heat stress, and cow health and well-being. Dairy cows are usually bred by artificial insemination (AI). Recent developments in the processing and dosage of semen for sex selection have the potential to improve the efficiency of reproduction. The timing and accuracy of insemination may be enhanced through automated detection of oestrus expression or by regulation of ovarian cycles using exogenous hormone treatments. Following insemination, the establishment and maintenance of pregnancy are critical factors in reproductive success. This Special Issue will publish original research papers and reviews that investigate means of enhancing the reproductive efficiency of dairy cows.

We invite you to share your research relating to this multifaceted topic in this Special Issue.

Dr. Emma Bleach
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • reproduction
  • dairy production
  • poor reproductive performance
  • dairy cows
  • milk production
  • housing
  • heat stress
  • cow health
  • artificial insemination (AI)
  • insemination
  • ovarian cycles
  • exogenous hormone treatments

Published Papers (2 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

20 pages, 1348 KiB  
Article
Estimates of the Economic Cost Caused by Five Major Reproductive Problems in Dairy Animals in Assam and Bihar, India
by Ram Pratim Deka, Ulf Magnusson, Delia Grace, Thomas F. Randolph, Rajeswari Shome and Johanna F. Lindahl
Animals 2021, 11(11), 3116; https://doi.org/10.3390/ani11113116 - 30 Oct 2021
Cited by 13 | Viewed by 2676
Abstract
Reproductive problems in dairy animals reduce fertility, prevent conception, create problems in the delivery of healthy calves, lead to postpartum complications, increase inter-calving periods, reduce milk yield, and lower overall lifetime productivity. This study aimed at understanding the incidence of reproductive problems and [...] Read more.
Reproductive problems in dairy animals reduce fertility, prevent conception, create problems in the delivery of healthy calves, lead to postpartum complications, increase inter-calving periods, reduce milk yield, and lower overall lifetime productivity. This study aimed at understanding the incidence of reproductive problems and the cost caused by these. The study covered 954 dairy animals in Bihar and 1348 dairy animals in Assam that were selected using a multi-stage random sampling method. The costs were calculated as the sum of income losses and expenditures incurred. The major cost incurred resulted from extended calving intervals (46.1% of the total cost), followed by loss through salvage selling (38.1%), expenditure for treatment of repeat breeders (5.9%), loss of milk production (5.3%) and expenditure for extra inseminations (2.0%). About one fifth of the selected reproductive problems were left untreated. The estimated cost of reproductive problems was Indian Rupees (INR) 2424.9 (USD 36.1) per dairy animal per year (of the total dairy animal population) which represented approximately 4.1% of the mean value loss of dairy animals (INR 58,966/USD 877) per year. Reproductive problems were significantly (p < 0.001) higher among improved (exotic breed or cross-bred) dairy animals than indigenous (native breed or nondescript indigenous) dairy animals. The study suggests that with the increase of improved dairy animal population, the loss may further increase. The study concludes that any economic estimation of reproduction problems based on aetiology without confirmatory diagnoses could be highly misleading because of the complex nature of the problems. Full article
(This article belongs to the Special Issue Reproduction in Dairy Cattle)
►▼ Show Figures

Figure 1

24 pages, 4292 KiB  
Article
Insights into the Mechanism of Bovine Spermiogenesis Based on Comparative Transcriptomic Studies
by Xin Li, Chenying Duan, Ruyi Li and Dong Wang
Animals 2021, 11(1), 80; https://doi.org/10.3390/ani11010080 - 05 Jan 2021
Cited by 3 | Viewed by 2687
Abstract
To reduce subfertility caused by low semen quality and provide theoretical guidance for the eradication of human male infertility, we sequenced the bovine transcriptomes of round, elongated spermatids and epididymal sperms. The differential analysis was carried out with the reference of the mouse [...] Read more.
To reduce subfertility caused by low semen quality and provide theoretical guidance for the eradication of human male infertility, we sequenced the bovine transcriptomes of round, elongated spermatids and epididymal sperms. The differential analysis was carried out with the reference of the mouse transcriptome, and the homology trends of gene expression to the mouse were also analysed. First, to explore the physiological mechanism of spermiogenesis that profoundly affects semen quality, homological trends of differential genes were compared during spermiogenesis in dairy cattle and mice. Next, Gene Ontology (GO), Kyoto Encyclopaedia of Genes and Genomes (KEGG) pathway enrichment, protein–protein interaction network (PPI network), and bioinformatics analyses were performed to uncover the regulation network of acrosome formation during the transition from round to elongated spermatids. In addition, processes that regulate gene expression during spermiogenesis from elongated spermatid to epididymal sperm, such as ubiquitination, acetylation, deacetylation, and glycosylation, and the functional ART3 gene may play important roles during spermiogenesis. Therefore, its localisation in the seminiferous tubules and epididymal sperm were investigated using immunofluorescent analysis, and its structure and function were also predicted. Our findings provide a deeper understanding of the process of spermiogenesis, which involves acrosome formation, histone replacement, and the fine regulation of gene expression. Full article
(This article belongs to the Special Issue Reproduction in Dairy Cattle)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-2
Back to TopTop