A comparison of the frequency of lambing on the reproductive performance of finn dorset ewes

1993 ◽  
Vol 1993 ◽  
pp. 90-90
Author(s):  
C.M. Minter
Keyword(s):  
Reproductive Performance ◽  
Management Systems ◽  
Gross Margin ◽  
Factors Affecting ◽  
The Difference ◽  
Sheep Production ◽  
Major Factors

One of the major factors affecting the efficiency and profitability of sheep production is the number of lambs reared per ewe. In 1991 lambs reared per ewe accounted for 14% of the difference in gross margin per hectare between top third and average lowland spring lambing flocks (MLC, 1992). The hypothesis was developed that in managing the prolific ewe three possible management systems could be employed; frequent lambing (FL), early annual lambing (EAL), or late annual lambing (LAL). The choice of these lambing systems was based on minimising the problems of the prolific ewe. Of these systems FL (lambing on an eight month cycle), provided the best opportuity for achieving high numbers of lambs sold per ewe.

scholarly journals The Effect of Stress on Reproduction and Reproductive Technologies in Beef Cattle—A Review

Animals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2096 ◽  
Author(s):  
Aitor Fernandez-Novo ◽  
Sonia S. Pérez-Garnelo ◽  
Arantxa Villagrá ◽  
Natividad Pérez-Villalobos ◽  
Susana Astiz
Keyword(s):  
Beef Cattle ◽  
Reproductive Performance ◽  
Stress Responses ◽  
Production Systems ◽  
Reproductive Technologies ◽  
Neural Systems ◽  
Factors Affecting ◽  
Health And Nutrition ◽  
Beef Herds ◽  
Major Factors

Researchers have contributed by increasing our understanding of the factors affecting reproduction in beef, mainly physical health and nutrition aspects, which have been main concerns during decades. Animal welfare is of outmost relevance in all animal production systems and it is strongly associated to stress. Stress responses involve endocrine, paracrine and neural systems and the consequences of this stress on the reproductive efficiency of specifically, beef cattle and bulls, need to be highlighted. We, therefore, describe the fundamentals of stress and its quantification, focusing in beef herds, reviewing the highly valuable pieces of research, already implemented in this field. We examine major factors (stressors) contributing to stress in beef cattle and their effects on the animals, their reproductive performance and the success of reproductive biotechnologies. We include terms such as acclimatization, acclimation or temperament, very relevant in beef systems. We examine specifically the management stress due to handling, social environment and hierarchy or weaning effects; nutritional stress; and thermal stress (not only heat stress) and also review the influence of these stressors on reproductive performance and effectiveness of reproductive biotechnologies in beef herds. A final message on the attention that should be devoted to these factors is highlighted.

Factors Affecting Reproductive Efficiency in Beef Cows

1989 ◽  
Vol 1989 ◽  
pp. 136-136
Author(s):  
A.J.F. Russel ◽  
I.A. Wright ◽  
E.A. Hunter
Keyword(s):  
Reproductive Performance ◽  
Beef Cows ◽  
Small Scale ◽  
Significant Treatment ◽  
Factors Affecting ◽  
Calf Growth ◽  
Large Numbers ◽  
Pregnancy And Lactation ◽  
Major Factors ◽  
Calving Intervals

Successful and timely rebreeding is of major importance to the economics of suckler cow enterprises. Research into the causes of reprodutive failure and extended calving intervals can be difficult, not least because of the need for experiments involving large numbers of animals if statistically significant treatment effects are to be demonstrated. Useful information however, can be obtained from the analysis of data derived from a number of relatively small-scale experiments, not necessarily on reproduction per se, but in which records of reproductive performance are available.This paper deals with the analysis of data on the reproductive performance of beef cows used in a number of experiments on the effects of nutrition during pregnancy and lactation on components of production such as milk yield and composition, calf birth weight and early calf growth rate. The objective of the analysis was to identify the major factors affecting calving interval and to quantify the magnitude of the effects of these factors.

scholarly journals Gold ETFs vs. Equity ETFs: Comparative Analysis of their Performance

2016 ◽  
Vol 3 (3) ◽  
pp. 222-227 ◽  
Author(s):  
Kumara R. Naveen
Keyword(s):  
Comparative Analysis ◽  
Mutual Funds ◽  
Exchange Traded Funds ◽  
Research Project ◽  
Factors Affecting ◽  
Short Period ◽  
The Difference ◽  
Major Factors ◽  
The Right

Exchange-traded funds (henceforth, ETFs) are passive investment vehicles which have become increasingly popular in a relatively short period of time due the benefits they provide when compared to Mutual Funds and other similar investment avenues. This study has been carried out to analyze the points of distinction between the two very popular forms of ETFs namely Gold ETFs and Equity ETFs. These funds are similar in their functioning however it is necessary to understand the difference in their performance so as to be able to choose the right market instrument for investing our money. Our research project aims at understanding this difference because performance is one of the major factors affecting the popularity of any investment option.Int. J. Soc. Sc. Manage. Vol. 3, Issue-3: 222-227

Reproductive performance and survival of Chinese Holstein dairy cows in central China

2012 ◽  
Vol 52 (1) ◽  
pp. 11 ◽  
Author(s):  
J. J. Wu ◽  
D. C. Wathes ◽  
J. S. Brickell ◽  
L. G. Yang ◽  
Z. Cheng ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Management Strategies ◽  
Dairy Farm ◽  
Central China ◽  
Dairy Herds ◽  
Factors Affecting ◽  
Chinese Holstein ◽  
Chinese Holstein Cows ◽  
Service Conception ◽  
Major Factors

Fertility and longevity, major factors affecting the economic performance of dairy herds, are influenced by management and genetics. This study determined the reproductive performance and survival of Chinese Holstein cows in a large, modern dairy farm in central China using two complementary datasets. In Dataset 1, fertility and culling records were obtained from 1430 cows calving in 2008; in Dataset 2, all calving episodes during 2005 and 2006 were recorded (n = 1540) and the subsequent survival and reasons for death or culling of all female calves born during this period were monitored. In Dataset 1, the mean ages at first breeding and first calving for heifers were 18.7 ± 2.6 and 29.3 ± 3.6 months, respectively. Cows (lactations 1–10) were first inseminated at 110 ± 49 days after calving (mean ± s.d.), conceived at 185 ± 103 days and required 2.3 ± 1.6 services per conception with a first service conception rate of 34%. Reproduction performance was lower in the first lactation, with the best fertility in autumn-calving cows. In Dataset 2, 601 live-born heifers were monitored from birth until first calving. Of these, 521 (87%) were inseminated at least once and 502 (84%) calved once, but only 68% of the starting population calved successfully for a second time. The main reasons for culling in both datasets were poor fertility, disease and lameness. Improved management strategies to avoid calving cows in the spring and so offset the adverse effects of summer heat stress together with increased emphasis on selection for good fertility and conformation traits would increase future profitability.

scholarly journals Narrowing the Feedback Gap: Examining Student Engagement with Personalized and Actionable Feedback Messages

2021 ◽  
pp. 1-16
Author(s):  
Hamideh Iraj ◽  
Anthea Fudge ◽  
Huda Khan ◽  
Margaret Faulkner ◽  
Abelardo Pardo ◽  
...  
Keyword(s):  
Student Perceptions ◽  
New Technologies ◽  
Self Regulation ◽  
Online Marketing ◽  
Instructional Designers ◽  
Factors Affecting ◽  
Course Success ◽  
Actual Use ◽  
The Difference ◽  
Major Factors

One of the major factors affecting student learning is feedback. Although the importance of feedback has been recognized in educational institutions, dramatic changes - such as bigger class sizes and a more diverse student population - challenged the provision of effective feedback. In light of these changes, educators have increasingly been using new digital tools to provide student feedback, given the broader adoption and availability of these new technologies. However, despite these efforts, most educators have limited insight into the recipience of their feedback and wonder which students engage with feedback. This problem is referred to as the "feedback gap," which is the difference between the potential and actual use of feedback, preventing educators and instructional designers from understanding feedback recipience among students. In this study, a set of trackable call-to-action (CTA) links were embedded in feedback messages focused on learning processes and self-regulation of learning in one fully online marketing course and one blended bioscience course. These links helped us examine the association between feedback engagement and course success. We also conducted two focus groups with students from one of the courses to further examine student perceptions of feedback messages. Our results across both courses revealed that early engagement with feedback is positively associated with passing the course and that most students considered feedback messages helpful in their learning. Our study also found some interesting demographic differences between students regarding their engagement with the feedback messages. Such insight enables instructors to ask "why" questions, support students' learning, improve feedback processes, and narrow the gap between potential and actual use of feedback. The practical implications of our findings are further discussed.

scholarly journals Coupling Hydrochemistry and Stable Isotopes (δ2H and δ18O) to Identify the Major Factors Affecting Hydrochemical Evolution of Groundwater in the Western Yellow Sea Coast, China

2021 ◽  
Author(s):  
Zhenyan Wang ◽  
Qiao Su ◽  
Shu Wang ◽  
Zongjun Gao ◽  
Jiutan Liu
Keyword(s):  
Economic Development ◽  
Seawater Intrusion ◽  
Yellow Sea ◽  
Mineral Dissolution ◽  
Factors Affecting ◽  
Groundwater Samples ◽  
The Difference ◽  
Major Factors ◽  
Western Yellow Sea ◽  
Sea Coast

Groundwater, as a precious fresh water resource, has a profound impact on the social and economic development in coastal areas. Western Yellow Sea coast (WYSC), located in the eastern part of China, is one of the most prosperous areas of China’s economic development and has a great demand for water. WYSC is currently under increasing pressure from groundwater pumped for regional development, and sustainable water management throughout the region must be based on an understanding of the hydrochemical processes that determine the quality of groundwater. This study taking WYSC as the study area, 160 groundwater samples were collected in the field and the content of Ca2+, Mg2+, Na+, K+, Cl-, SO42-, HCO3-, F, Br, δ2H and δ18O in groundwater were tested. The groundwater chemical characteristics, sources of groundwater substances, hydrogeochemical processes and the difference between the Shandong part (SDP) and Jiangsu part (JSP) were studied. The result shows that the content sequence of main cations and anions in groundwater of WYSC are Na+ > Ca2+ > Mg2+ > K+ and HCO3- > Cl- > SO42-. The hydrochemical types of WYSC groundwater are mainly Cl-Na, Cl-Ca, HCO3-Na and HCO3-Ca. The main recharge source of groundwater in the WYSC is precipitation, and the seawater and evaporation also affect the recharge process. The main sources of dissolved substances in groundwater in the WYSC are mineral dissolution, evaporation and seawater. The groundwater in SDP is affected by modern seawater intrusion, while that in JSP may be affected by ancient seawater intrusion. The dissolution and precipitation of various minerals in the groundwater in the WYSC are affected not only by regional conditions but also by seawater intrusion.

On the Major Differences between the Banking Systems of the EAEU States

2020 ◽  
Vol 26 (4) ◽  
pp. 397-406
Author(s):  
T. E. Chekanova
Keyword(s):  
Financial Stability ◽  
Systems Approach ◽  
Negative Impact ◽  
Banking Regulation ◽  
Member States ◽  
Banking Systems ◽  
Significant Negative Impact ◽  
The Difference ◽  
The Government ◽  
Major Factors

The presented study examines the problems of integration of the national banking systems of the member states of the Eurasian Economic Union (EAEU).Aim. The study aims to examine the major differences in various aspects of functioning of banking systems in the EAEU member states in terms of their impact on integration processes.Tasks. The author identifies the most prominent features of the banking systems of the EAEU states; reveals the depth of the existing differences through a comparative analysis of various indicators of national banking systems; outlines ways of overcoming integration problems associated with differences in the banking sectors of the Union states.Methods. This study is based on universal general scientific methods and elements of comparative, functional, and economic analysis within the framework of a systems approach. The author uses regulatory documents and banking reports of the EAEU states, statistical and analytical materials of the Eurasian Economic Commission (EEC), and data of Moody’s international rating agency.Results. The study identifies a number of aspects that contain the major differences in the functioning of banking systems in the EAEU member states; highlights the disproportions in the scale, level of development, financial stability, and risks of the banking spheres of the Union states; comparatively analyzes the proportion of banking and non-banking structures in the system and the share of the government and non-resident companies in the capital of banks; marks the difference in the pricing of banking services; determines differences in the existing approaches to banking regulation and the established standards; analyzes the major differences in the legislative acts of the central banks and governments of the EAEU member states and in the terms and definitions used. According to the results of the study, the major factors hindering the development of integration processes between the banking systems of the EAEU states are identified.Conclusions. The existing differences between the banking systems of the EAEU countries are diverse and multifaceted. The author states that the aspects addressed in this study have a significant negative impact on the further development of integration processes, describing the major directions and actions of the member states aimed at minimizing the exiting differences, which are required to facilitate the convergence of the states and the transition towards a common financial market.

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