Key indicators and decision-making trees to analyse reproduction problems linked to environmental factors: data from a commercial dairy unit

2009 ◽  
Vol 2009 ◽  
pp. 14-14
Author(s):  
E Knapp ◽  
P Chapaux ◽  
L Istasse ◽  
K Touati

Reproduction performances in cattle regularly decreased with time. For example, the number of inseminations per pregnancy increased in dairy herds from 1.43 to 1.75 and the calving interval (CI) from 385 to 412 days in 10 years (Leroy et al., 2006). Such a reduction is responsible for rising income losses for breeders. In Belgium, an increase of the age at first calving (AFC) by 3 months and of the CI by 20 days induced a gross margin reduction of about 500 € /cow/year.

Author(s):  
Hasan Cicek ◽  
Murat Tandogan ◽  
Cangir Uyarlar

This study was performed to determine the financial losses due to fertility problems in Anatolian Dairy Buffaloes. The study material was lactation average values of Anatolian Dairy Buffalo. Age at first calving and calving interval were evaluated as fertility parameters. The financial losses relevant to one-day extension of these parameters were calculated. Bull cost was determined as per pregnancy, due to natural mating usually occurs in Anatolian Buffalo. The prices of calf, milk and feed were used in calculations. Accordingly, financial losses of one-day extension per animal in age at first calving and calving interval estimated were US$ 8.88 and US$ 6.07, respectively. When bull cost per pregnancy (US$ 6.49) was included, total losses were detemined as US$ 21.44. As a conclusion, it was determined that fertility losses may be induced in age at first calving and calving interval according to the deviations of target values. It was emphasized that financial losses might be reduced with improving of environmental factors in buffaloes which have important fertility disadvantages according to dairy cattle.


animal ◽  
2016 ◽  
Vol 10 (11) ◽  
pp. 1877-1882 ◽  
Author(s):  
V.E. Sherwin ◽  
C.D. Hudson ◽  
A. Henderson ◽  
M.J. Green

1985 ◽  
Vol 33 (1) ◽  
pp. 59-61
Author(s):  
A.A. Dijkhuizen ◽  
S. Hibma ◽  
J.A. Renkema

A 15 year simulation was carried out in order to test a model for dairy cattle culling. Provisional results indicate that decreasing max. allowed calving interval from 520 to 360 days decreases herd income due to adverse effects on herd life. (Abstract retrieved from CAB Abstracts by CABI’s permission)


2013 ◽  
Vol 1 (2) ◽  
pp. 55-61
Author(s):  
M. Ruhul Amin ◽  
Bhuiyan A.K.F.H ◽  
Habib M.A Habib ◽  
Khan M.A.S

The study was aimed to observe reproductive pattern and efficiency of Red Chittagong Cattle (RCC) including reproductive history taken from two different herds; nucleus herd (on-station) and community herd (on-farm) in Mymensingh district of Bangladesh. A total of 184 calving parity records from 66 RCC cows that included 317 estrous, 164 conception and 178 calving history covering a period from 2005 to 2011 were considered for analyses. The highest frequencies of estrous, conception and calving occurred in May (13%, 15% and 14%, respectively), while the lowest in September for estrous (4%) and conception (4%) and April and June for calving (5%). The month of the year had significant (p<0.001 to p<0.05) effect on both estrous and calving but not for conception (p>0.05). There was no significant effect of season with estrous or conception or calving, but numerically highest incidence of estrous and conception in summer (36% and 38%, respectively) and calving in winter (36%) are noted. The seasonal indexes of calving in the on-station and on-farm herds were 0.73 and 0.78 respectively, with an overall mean of 0.68. The breeding or reproductive efficiency of the nucleus herd was estimated based on calving interval and age at first calving along with calving interval and the calculated results were 79 % and 82%, respectively for those two methods of estimation. The result obtained in this study indicates the reproductive behavior of RCC did not differ significantly by season, but varied with month of the year. In addition, reproductive efficiency of RCC in this study was slightly lower than that of expected.


2004 ◽  
Vol 34 (4) ◽  
pp. 1163-1167 ◽  
Author(s):  
Luis Ernani Henkes ◽  
Magda Vieira Benavides ◽  
João Francisco Coelho Oliveira ◽  
José Carlos Ferrugem Moraes ◽  
Tania Azevedo Weimer

Cytoplasmic inheritance influence on reproductive traits was investigated in the Brangus-Ibagé cattle (3/8 Nelore x 5/8 Aberdeen Angus). Additive genetic effects were responsible for 12% ± 11% of phenotypic variation observed in first calving interval, but their contribution dropped to zero when all calving intervals (CI) were considered. The heritability estimate for age at first calving (AFC, in days) was 0.19 ± 0.09. Mitochondrial lineage (MIT) had negligible effects on phenotypic variances of calving interval (0.0 ± 0.02), calf birth weight (0.0 ± 0.01), and cow weight at calving (0.0 ± 0.01). However, for the age at first calving, MIT accounted for 0.15 ± 0.07 of total variation. Cow weight at calving had a significant linear effect on CI and AFC. Three D-loop mtDNA mutations significantly affected either calving interval (T®C at sites 16,113 and 16,119) or calf birth weight (T®C at site 16,113). The C variants had decreased CI (29 and 32 days, respectively) and increased calf weight (0.6kg). Although the effects were small, direct selection for these mutation-carrier cows might improve the reproductive and developmental performance in this herd.


2021 ◽  
Vol 748 (1) ◽  
pp. 012025
Author(s):  
R Reswati ◽  
BP Purwanto ◽  
R Priyanto ◽  
W Manalu ◽  
R I Arifiantini

Abstract The swamp buffalo population in West Sumatra Province decline continuously due to the low female reproductive performance. This research was conducted to identify female buffalo reproductive performance, which could be used as baseline data to enhance its population growth. A survey research method was conducted in two subdistricts, namely Lubuk Basung and Matur, located at different altitudes. Data were collected by interviewing farmers and observing their farms. The parameters observed were age at first mating, age at first calving, calving interval, service per conception, and buffalo farming practices. Significant differences in reproductive performances of female buffalo were observed. Age at first mating 39.04 ± 9.91 and 33.67 ± 5.3 mo., age at first calving 51.61 ± 9.95 and 45.71 ± 5.58 mo., calving interval 27.26 ± 8.84 and 24.17 ± 7.06 mo., and services per conception 1.82 ± 0.82 and 1.55 ± 0.78 were represented buffalo in Lubuk Basung and Matur, respectively. The buffalo reproductive performances in both locations were not optimal; however, Matur’s buffalo reproductive performances were better than those in Lubuk Basung due to its better farming practices and more comfort climatic conditions. Therefore, improving farming practice is essential to enhance buffalo’s reproductive performance and population growth.


2018 ◽  
Vol 112 ◽  
pp. 412-424 ◽  
Author(s):  
Melania Salazar-Ordóñez ◽  
Florian Schuberth ◽  
Elena R. Cabrera ◽  
Manuel Arriaza ◽  
Macario Rodríguez-Entrena

Author(s):  
Ervin H. Zube

Environmental assessment has been defined as “a general conceptual and methodological framework for describing and predicting how attributes of places relate to a wide range of cognitive, affective, and behavioral responses” (Craik & Feimer, 1987). A primary purpose for assessing environments is to provide valid and reliable information that has utility in environmental planning, design, and management decision making. Implicit in the assessment activity is the assumption of identifiable relationships of physical environmental factors with descriptive and evaluative assessments, and with predictions of responses to places conceptualized in plans and designs, but not yet built. This chapter addresses the utility of research findings. Three primary questions are posed. Why are some environmental assessment and cognition research findings used successfully in decision making while others are not? What factors contribute to these outcomes? And how important are physical environmental factors in planning, design, and management decision making? The preceding chapters by Rachel Kaplan, Reginald Golledge, and Harry Timmermans provide the background for the following discussion. The first section of this chapter presents a brief review of similarities and differences among the three preceding chapters, with specific attention directed to interpretations or definitions of the concepts of assessment and preference, the use of physical environmental variables in the assessment process, and the roles of laypersons and experts in assessment. Potential uses for and applications of environmental assessment research are described in the second section. This is followed by a discussion of the differences between instrumental and conceptual applications and of factors that have been identified as influencing applications, factors such as communications between researchers and users, responsibilities for problem definition, and the context within which the research is conducted. This chapter concludes with a discussion of the opportunities for and probable limitations on applications of the preceding chapters by R. Kaplan, Golledge, and Timmermans. Four concepts and elements that are addressed in the three chapters have been selected for purposes of structuring a comparison among them. These concepts and elements—assessment, preference, roles of laypersons and experts, and physical environmental factors—are particularly salient to the issue of research applications.


2020 ◽  
Vol 240 ◽  
pp. 104108
Author(s):  
M.P. Turiello ◽  
C. Vissio ◽  
A.J. Heinrichs ◽  
L.C. Issaly ◽  
A. Larriestra

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