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1.
Trop Anim Health Prod ; 55(2): 81, 2023 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-36790501

RESUMEN

Cooperatives are organisations owned and operated by individuals or groups that come together for mutual benefit including pooling of resources for the purchase of inputs and marketing of products. Marketing of milk is through dairy cooperatives where the milk collection centres are mandated to help integrating smallholder farmers into competitive markets. The study investigated governance structures of five smallholder dairy schemes purposively selected based on their agroecological regions in Zimbabwe. The aim of the study was to explore how the governing boards conduct their business, particularly marketing milk, and how this affects allocation of resources (milk production and deliveries to milk centres) by smallholder farmers. Qualitative data were collected using focus group discussions with 20 dairy cooperative members from each milk collection centre. Key informant interviews were conducted with chairpersons, management committee members, and dairy value chain stakeholders such as dairy associations and processors. The SWOT analysis technique was employed to identify governance structures highlighting major strengths, weakness, opportunities, and threats as a gateway to isolating strategies for enhancing centre performance. An analysis of implications of the governance structures on resource allocation decision by farmers was also performed. So focus is on how boards are discharging mandate such as marketing on behalf of farmers, price setting and negotiations, trainings, and accountability to members. Such factors if executed well will see farmers increasing milk production and deliveries to MCC yielding positive results in income and profits. The study results show that poor governance mainly caused by incompetent boards and management committees was the major factor affecting performance. Other findings were that if good governance factors were in place, then cooperatives became proficient leading to their growth. Thus, cooperatives must adopt business models based on private sector partnerships to maximise on expertise and technical support. The schemes ought to take advantage of existing opportunities, especially policies that mitigate threats and improve product diversity, value addition, and effective pricing strategies. To achieve these milestones, capacity building roadmaps ought to identify competent and efficient boards.


Asunto(s)
Industria Lechera , Agricultores , Animales , Humanos , Industria Lechera/economía , Industria Lechera/legislación & jurisprudencia , Industria Lechera/organización & administración , Grupos Focales , Leche/economía , Zimbabwe , Renta
2.
J Dairy Res ; 89(4): 367-374, 2022 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-36453120

RESUMEN

This study assessed the impact of improved green fodder production activities on technical efficiency (TE) of dairy farmers in climate vulnerable landscapes of central India. We estimated stochastic production frontiers, considering potential self-selection bias stemming from both observable and unobservable factors in adoption of fodder interventions at farm level. The empirical results show that TE for treated group ranges from 0.55 to 0.59 and that for control ranges from 0.41 to 0.48, depending on how biases are controlled. Additionally, the efficiency levels of both adopters and non-adopters would be underestimated if the selectivity bias is not appropriately accounted. As the average TE is consistently higher for adopter farmers than the control group, promoting improved fodder cultivation would increase input use efficiency, especially in resource-deprived small holder dairy farmers in the semi-arid tropics.


Asunto(s)
Alimentación Animal , Industria Lechera , Agricultores , Animales , Humanos , Alimentación Animal/análisis , Industria Lechera/economía , Industria Lechera/métodos , Granjas , India , Clima Tropical
3.
Trop Anim Health Prod ; 54(4): 221, 2022 Jun 29.
Artículo en Inglés | MEDLINE | ID: mdl-35767092

RESUMEN

Smallholder dairy production in Senegal is important to both livelihoods and food and nutrition security. Here, we examine the economic performance of smallholder dairy cattle enterprises in Senegal, using data from longitudinal monitoring of 113 households. The mean (and standard deviation) of the net returns (NR) per cow per annum (pcpa) was 21.7 (202.9) USD, whilst the NR per household herd per annum (phpa) was 106.1 (1740.3) USD. Only about half (52.2%) of the dairy cattle enterprise had a positive NR. The most significant income components were milk sale followed by animal sale, whilst the most significant cost components were animal feed followed by animal purchase. When households were grouped by ranking on NRpcpa, an interesting trend was observed: whilst the mean NRpcpa showed a fairly linear increase from the lowest to highest NR groups, income and cost did not. Income and costs were both higher for the lowest and highest NR groups, in comparison to the intermediate NR groups. The mean NRs of households grouped by the main breed type they kept were not significantly different from each other, due to large variances within the breed groups. However, the mean total income and costs were significantly higher for households mainly keeping improved dairy breeds (Bos taurus or Zebu × Bos taurus crosses) in comparison to those keeping indigenous Zebu or Zebu by Guzerat crosses. This study highlights the highly variable (and often low) profitability of smallholder dairy cattle enterprise in Senegal. Further actions to address this are strongly recommended.


Asunto(s)
Industria Lechera , Leche , Alimentación Animal/economía , Animales , Bovinos , Industria Lechera/economía , Femenino , Renta , Leche/economía , Senegal
4.
PLoS One ; 17(2): e0264410, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35213644

RESUMEN

The economic, environmental and social sustainability of Dutch dairy farms have attracted increasing societal concern in the past decades. In this paper, we propose a recently developed dynamic Luenberger indicator based on the by-production model to measure dynamic productivity growth in the economic, environmental and social dimensions of sustainability of Dutch dairy farms. Subsequently, we investigate the statistical associations between productivity growth and socio-economic factors using the OLS bootstrap regression model. We find that dairy farms have suffered a decline in dynamic sustainable productivity growth, especially in the environmental dimension where it is more pronounced than in the economic and social dimensions. Furthermore, we find that both technical and scale inefficiency change contribute to the decline of environmental productivity growth. Specialization and government support are associated with a higher economic and environmental sustainability productivity growth, and with, a decreased growth of social sustainable productivity. We found no significant association between the age of the oldest entrepreneur, financial structure, farm size or cost of advisory service and dynamic productivity growth in the three sustainability dimensions. The results provide insights into potential pathways towards improving the three pillars of sustainability.


Asunto(s)
Industria Lechera/economía , Granjas/economía , Leche , Crecimiento Sostenible , Animales , Bovinos , Países Bajos
5.
Parasitol Int ; 86: 102476, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-34610467

RESUMEN

Trypanosoma theileri is considered a non- or low-pathogenic trypanosome that generally causes latent infection in apparently healthy cattle; however, T. theileri propagates in the bloodstream and may cause clinical disease in pregnant animals or co-infection with bovine leukemia virus or Theileria orientalis. In the current study, a monthly survey of T. theileri infection over one year was carried out in a research dairy farm in Hokkaido, Japan to determine the 1) seasonal variations in the prevalence, 2) genetic characterization of T. theileri, and 3) associations of milk and blood parameters in dairy cattle with T. theileri infection, including data of metabolic profile tests and dairy herd performance tests, using linear mixed models. We found that 1) the prevalence of T. theileri infection was significantly higher in summer and winter than in other seasons; 2) T. theileri possibly showed genetic diversity in Eastern Hokkaido; and 3) T. theileri infection was associated with significantly lower levels of blood urea nitrogen, milk protein, and solids-not-fat, which are caused by a low rumen fermentation level. This is the first study to report the negative impact of T. theileri infection in dairy cattle, and our study indicates that control of T. theileri infection can improve the productivity of dairy cattle.


Asunto(s)
Enfermedades de los Bovinos/epidemiología , Industria Lechera/economía , Variación Genética , Trypanosoma/fisiología , Tripanosomiasis/veterinaria , Animales , Sangre/parasitología , Bovinos , Enfermedades de los Bovinos/parasitología , Japón/epidemiología , Leche/parasitología , Estaciones del Año , Trypanosoma/genética , Tripanosomiasis/epidemiología , Tripanosomiasis/parasitología
6.
Prev Vet Med ; 198: 105528, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-34773833

RESUMEN

Bovine leukemia virus (BLV) infection is endemic in Japanese dairy farms. To promote the participation of farmers in BLV infection control in Japan, it is important to provide estimates of the economic losses caused by this infection. We hypothesized that decreased immune function due to BLV infection would increase visceral abnormalities, in turn reducing carcass weight. We employed mediation analysis to estimate the annual economic loss due to carcass weight reduction caused by BLV infection. Culled Holstein cows from 12 commercial dairy farms in the Nemuro and Kushiro regions of Hokkaido, Japan, were traced. Information on age and the last delivery day were collected. A non-infected culled cow was defined as a cow from which BLV provirus was not detected. A high-proviral-load (H-PVL) cow was defined as a cow whose PVL titer was above 2465 copies/50 ng DNA or 56,765 copies/105 cells. A BLV-infected cow with PVL titer lower than the thresholds was categorized as low-proviral load (L-PVL). Post-mortem examination results for culled cows were collected from a meat inspection center. The hypothesis was tested by three models, using data from 222 culled dairy cows. Model 1, a generalized linear mixed-effects model, selected carcass weight as an outcome variable, BLV status and the potential confounders (lactation stage and age) as explanatory variables, and herd as a random effect. Model 2 additionally included the number of abnormal findings in the post-mortem examination (AFPE) as an explanatory variable. Model 3 applied a Bayesian generalized linear mixed model, which employed a mediator separately modeled for AFPE, to estimate the amount of direct, indirect, and total carcass weight loss with adjustment for known confounding factors. Compared to the mean carcass weight for the non-infected culled cows, the carcass weight for H-PVL culled cows was significantly decreased by 30.4 kg on average. For each increase of one in the number of AFPE, the mean carcass weight was decreased by 8.6 kg. Only the indirect effect of BLV H-PVL status on carcass weight loss through AFPE was significant, accounting for 21.6 % of the total effect on carcass weight reduction. In 2017, 73,650 culled dairy cows were slaughtered in Hokkaido, and the economic loss due to carcass weight loss caused by BLV infection that year was estimated to be US $1,391,649. In summary, unlike L-PVL cows, H-PVL status was associated with carcass weight reduction, which was partially mediated by an increase in the number of visceral abnormalities.


Asunto(s)
Enfermedades de los Bovinos , Industria Lechera/economía , Leucosis Bovina Enzoótica , Pérdida de Peso , Animales , Teorema de Bayes , Bovinos , Enfermedades de los Bovinos/economía , Enfermedades de los Bovinos/epidemiología , Leucosis Bovina Enzoótica/economía , Leucosis Bovina Enzoótica/epidemiología , Femenino , Japón/epidemiología , Virus de la Leucemia Bovina
7.
PLoS One ; 16(12): e0259982, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34882689

RESUMEN

The impact of food taboos-often because of religion-is understudied. In Ethiopia, religious fasting by Orthodox Christians is assumed to be an important impediment for the sustainable development of a competitive dairy sector and desired higher milk consumption, especially by children. However, evidence is limited. Relying on unique data, we shed light on three major issues. First, we observe that the average annual number of fasting days that Orthodox adults are effectively adhering to is 140, less than commonly cited averages. Using this as an estimate for extrapolation, fasting is estimated to reduce annual dairy consumption by approximately 12 percent nationally. Second, farms adapt to declining milk demand during fasting by increased processing of milk into storable products-fasting contributes to larger price swings for these products. We further note continued sales of milk by non-remote farmers and reduced production-by adjusting lactation times for dairy animals-for remote farmers. Third, fasting is mostly associated with increased milk consumption by the children of dairy farmers, seemingly because of excess milk availability during fasting periods. Our results suggest that fasting habits are not a major explanation for the observed poor performance of Ethiopia's dairy sector nor low milk consumption by children. To reduce the impact of fasting on the dairy sector in Ethiopia further, investment is called for in improved milk processing, storage, and infrastructure facilities.


Asunto(s)
Industria Lechera/métodos , Ayuno , Leche/economía , Agricultura , Animales , Cristianismo , Industria Lechera/economía , Etiopía , Humanos , Tabú
8.
J Dairy Res ; 88(3): 270-273, 2021 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-34392837

RESUMEN

In this Research Communication we investigate the motivations of Brazilian dairy farmers to adopt automated behaviour recording and analysis systems (ABRS) and their attitudes towards the alerts that are issued. Thirty-eight farmers participated in the study distributed into two groups, ABRS users (USERS, n = 16) and non-users (NON-USERS, n = 22). In the USERS group 16 farmers accepted being interviewed, answering a semi-structured interview conducted by telephone, and the answers were transcribed and codified. In the NON-USERS group, 22 farmers answered an online questionnaire. Descriptive analysis was applied to coded answers. Most farmers were young individuals under 40 years of age, with undergraduate or graduate degrees and having recently started their productive activities, after a family succession process. Herd size varied with an overall average of approximately 100 cows. Oestrus detection and cow's health monitoring were the main reasons given to invest in this technology, and cost was the most important factor that prevented farmers from purchasing ABRS. All farmers in USERS affirmed that they observed the target cows after receiving a health or an oestrus alert. Farmers believed that they were able to intervene in the evolution of the animals' health status, as the alerts gave a window of three to four days before the onset of clinical signs of diseases, anticipating the start of the treatment.The alerts issued by the monitoring systems helped farmers to reduce the number of cows to be observed and to identify pre-clinically sick and oestrous animals more easily. Difficulties in illness detection and lack of definite protocols impaired the decision making process and early treatment, albeit farmers believed ABRS improved the farm's routine and reproductive rates.


Asunto(s)
Actitud , Conducta Animal , Industria Lechera/instrumentación , Industria Lechera/métodos , Agricultores/psicología , Monitoreo Fisiológico/veterinaria , Adulto , Factores de Edad , Animales , Brasil , Bovinos , Costos y Análisis de Costo , Industria Lechera/economía , Escolaridad , Detección del Estro/instrumentación , Detección del Estro/métodos , Femenino , Humanos , Monitoreo Fisiológico/economía , Monitoreo Fisiológico/instrumentación , Motivación
9.
PLoS One ; 16(8): e0255791, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34383791

RESUMEN

Urbanization is a main driver of agricultural transition in the Global South but how it shapes trends of intensification or extensification is not yet well understood. The Indian megacity of Bengaluru combines rapid urbanization with a high demand for dairy products, which is partly supplied by urban and peri-urban dairy producers. To study the impacts of urbanization on dairy production and to identify key features of dairy production systems across Bengaluru's rural-urban interface, 337 dairy producers were surveyed on the socio-economic profile of their household, their dairy herd and management, resources availability and, in- and output markets. A two-step cluster analysis identified four spatially explicit dairy production systems based on urbanization level of their neighborhood, reliance on self-cultivated forages, pasture use, cattle in- and outflow and share of specialized dairy genotypes. The most extensive dairy production system, common to the whole rural-urban interface, utilized publicly available feed resources and pasture grounds rather than to cultivate forages. In rural areas, two semi-intensive and one intensive dairy production systems relying on self-cultivation of forage with or without pasture further distinguished themselves by their herd and breeding management. In rural areas, the village's dairy cooperative, which also provided access to inputs such as exotic genotype through artificial insemination, concentrate feeds and health care, was often the only marketing channel available to dairy producers, irrespective of the dairy production system to which they belonged. In urban areas, milk was mostly sold through direct marketing or a middleman. Despite rapidly progressing urbanization and a population of 10 million, Bengaluru's dairy sector still relies on small-scale family dairy farms. Shifts in resources availability, such as land and labor, are potential drivers of market-oriented intensification but also extensification of dairy production in an urbanizing environment.


Asunto(s)
Agricultura/economía , Industria Lechera/economía , Animales , Cruzamiento , Bovinos , Análisis por Conglomerados , Agricultores/psicología , Humanos , India , Leche/economía , Encuestas y Cuestionarios , Urbanización
10.
Reprod Domest Anim ; 56(9): 1165-1175, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-34008236

RESUMEN

Reproductive performance is a key factor in determining the profitability of dairy farm, which is affected by many factors such as environment and diseases. Mastitis is a common and important disease, which has caused huge economic losses to the dairy industries worldwide. Mammary gland infection causes immune responses, resulting in the abnormal secretion of cytokines and hormones and abnormal function of the reproductive system such as the ovary, corpus luteum, uterus and embryo. Cows with mastitis have delayed oestrus, decreased pregnancy rate and increased risk of abortion. The adverse effects of mastitis on reproductive performance are affected by many factors, such as occurrence time, pathogen and cow factors. This paper primarily reviews the progress in the effects and mechanisms of mastitis on reproductive performance, with emphasis on maternal transcriptome, genomic analysis, epigenetic modification, microbiota, inflammatory regulation and immune evasion mechanism of mastitis, aiming to provide directions for the prevention and control of mastitis in the future.


Asunto(s)
Mastitis Bovina/complicaciones , Mastitis Bovina/patología , Reproducción , Aborto Veterinario , Animales , Bovinos , Industria Lechera/economía , Industria Lechera/estadística & datos numéricos , Epigénesis Genética , Femenino , Mastitis Bovina/inmunología , Mastitis Bovina/microbiología , Embarazo , Índice de Embarazo , Transcriptoma
11.
Trop Anim Health Prod ; 53(2): 258, 2021 Apr 13.
Artículo en Inglés | MEDLINE | ID: mdl-33847844

RESUMEN

Despite growing milk demand and imports, market-oriented milk production and formal processing in Ethiopia is limited to areas around Addis Ababa, notwithstanding its competing land use demand. This study assessed biophysical and market potential for developing the dairy sector, characterizing Ethiopian dairy clusters. Biophysical data from geographic information system (GIS) sources and information from key informants were combined in mapping and ranking these clusters on milk production potential. Twenty-four indicators in six major categories were applied for this assessment: feed availability, environmental conditions for dairy cattle, current production status, access to inputs and services, output market access, and production expansion potential. Feed availability (fodder, crop residues, and agro-industrial by-products as well as land availability and affordability) were the main drivers for dairy development, followed by the current production status, mainly driven by number of (improved) dairy cattle and (formal) milk volumes. Dairy clusters close to Addis Ababa had the highest overall scores for development potential, mainly determined by local demand and access to inputs. For dairy sustainable dairy development in Ethiopia, companies seeking long-term opportunities may avoid the Addis Ababa area and develop dairy production and processing in other clusters especially in Amhara and Tigray regions, with good milk production potential but less developed market infrastructure. The combination of biophysical data and key informant knowledge offered key strengths in delivering valuable results within a short time span. It however requires a careful selection of knowledgeable key informants whose expertise cover a broad scope of the dairy value chain.


Asunto(s)
Industria Lechera/economía , Industria Lechera/tendencias , Leche , Factores Socioeconómicos , Alimentación Animal/análisis , Animales , Bovinos , Etiopía , Femenino , Sistemas de Información Geográfica
12.
PLoS One ; 16(4): e0248576, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33793590

RESUMEN

Market participation among beef cattle farmers is key to ensuring better income, food security, and sustainable beef supply. Farmers in the traditional beef cattle sector, nevertheless, are well known for their low market participation. This study, thus, sought to examine factors that influenced market participation among beef cattle farmers in the Meatu district of Simiyu region, Tanzania. The study randomly selected a sample size of 393 farmers. The cross-sectional data collected through interviews and questionnaires were analyzed using descriptive statistics and ordinary least squares (OLS) regression models. The descriptive analyses showed that the average age of the interviewees was 53.73 years with a family size of 13.11. On average, the respondents had about 24.14 years of farming experience. Most of the respondents (67.9%) had primary education. Among the respondents, about 61.3%, 4.6%, and 32.6% had access to market information, farm credits, and veterinary services, respectively. The average cattle herd size was 53.46 heads. About 90.1% of farmers had participated in the markets by selling an average of 5 heads each, per year. This study has revealed low volume of sales, low education levels, and poor access to credits and veterinary services as the major factors that limit market participation. Furthermore, econometric results show that the key factors that significantly influenced farmers to increase the volume of beef cattle sales in the market at P < 0.05 included price, herd size, off-farm income, distance to market, age of the farmer, and cattle fattening. Moreover, membership in cooperatives, access to market information, and farming experience also had significant influence at P < 0.05. This study recommends establishment of strategic cooperatives to function not only as a communication channel for farm credits, price, market information, and training on commercial farming, but also to assist farmers in selection of profitable markets.


Asunto(s)
Crianza de Animales Domésticos/economía , Comercio/economía , Industria Lechera/economía , Agricultores/estadística & datos numéricos , Granjas/estadística & datos numéricos , Crianza de Animales Domésticos/métodos , Animales , Bovinos , Comercio/estadística & datos numéricos , Estudios Transversales , Industria Lechera/métodos , Industria Lechera/estadística & datos numéricos , Agricultores/educación , Granjas/economía , Humanos , Masculino , Persona de Mediana Edad , Encuestas y Cuestionarios , Tanzanía
13.
J Dairy Res ; 88(1): 3-7, 2021 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-33745462

RESUMEN

The global dairy sector is facing the challenge of reducing greenhouse gas (GHG) emissions whilst increasing productivity to feed a growing population. Despite the importance of this challenge, many developing countries do not have the required resources, specifically funding, expertise and facilities, for quantifying GHG emissions from dairy production and research. This paper aims to address this challenge by discussing the magnitude of the issue, potential mitigation approaches and benefits in quantifying GHG emissions in a developing country context. Further, the paper explores the opportunities for developing country dairy scientists to leverage resources from developed countries, such as using existing relevant GHG emission estimation models. It is clear that further research is required to support developing countries to quantify and understand GHG emissions from dairy production, as it brings significant benefits including helping to identify and implement appropriate mitigation strategies for local production systems, trading carbon credits and achieving the nationally determined contribution obligations of the Paris Agreement.


Asunto(s)
Bovinos/metabolismo , Industria Lechera/métodos , Países en Desarrollo , Gases de Efecto Invernadero/análisis , Investigación , Crianza de Animales Domésticos/métodos , Animales , Industria Lechera/economía , Países en Desarrollo/economía , Femenino , Seguridad Alimentaria , Efecto Invernadero/prevención & control , Gases de Efecto Invernadero/metabolismo
14.
Prev Vet Med ; 189: 105297, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-33677407

RESUMEN

Johne's disease (JD), or paratuberculosis, is an infectious disorder primarily associated with cattle and sheep and resulting in significant economic losses for dairy producers. The dairy cattle herd-level prevalence in Canada has recently been estimated to be greater than 40%, but the willingness to pay for JD control practices such as testing-and-culling and vaccination among Canadian dairy producers is unknown. This study used confidential cost-of-production data from the Canadian Dairy Commission to develop a Canadian dairy production model incorporating feed, land, labor, and machinery. A second dataset from a nationally distributed questionnaire (closed in March 2020) was used to estimate individual dairy producer valuations of the reduced per-cow cost of milk production that would result from JD control. This is a novel application of compensating variation and equivalent variation (CV and EV), with dairy producers framed as consumers of production inputs and milk output as a proxy for utility. Assuming a within-herd prevalence of 12.5% and a 50% reduction of that prevalence over 10 years, it was estimated JD control has an annual value of CA$28 per cow for the average Canadian dairy producer. Within-herd prevalence, the effectiveness of control at reducing within-herd prevalence, and the time required to achieve that reduction were identified as important factors. With the same assumption of 12.5% within-herd prevalence but with 100% reductions in that prevalence, estimated values ranged from over CA$55 to over CA$90 per cow per year depending on the timeframe of the control program. When assuming a 10-year period required to achieve control, the estimated values exceeded CA$90 per cow per year in various scenarios for herds with higher within-herd prevalence (greater than 20%).


Asunto(s)
Enfermedades de los Bovinos , Industria Lechera/economía , Paratuberculosis , Animales , Canadá/epidemiología , Bovinos , Enfermedades de los Bovinos/epidemiología , Enfermedades de los Bovinos/prevención & control , Femenino , Leche , Paratuberculosis/epidemiología , Paratuberculosis/prevención & control
15.
Reprod Domest Anim ; 56(5): 792-800, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-33624363

RESUMEN

An attempt was made for the first time in India to develop the performance indices for quantifying the relative emphasis to be given to production, reproduction, health and longevity traits for selection and genetic improvement of Sahiwal cattle in a sustainable manner. The study was conducted using information related to various production, reproduction, health and longevity traits spread over a period of 29 years in Sahiwal cattle. Using income and expenditure method, the relative economic values for 305 days milk yield (305DMY), average daily milk yield (ADMY), calving to first insemination interval (CFI), days open (DO) and longevity (LNG) were estimated as 1, 1, -6.62, -6.62 and 5.96 in Sahiwal cattle. A total of three performance indices were constructed using three-trait combination, that is production, reproduction and longevity before and after excluding the days suffered by the animals. Correlation between the aggregate genotype and index (RIH ) was computed to determine the accuracy of each performance index, and based on highest RIH value, best performance index was identified for selection of Sahiwal cattle. Developed indices were further assessed for robustness by increasing the relative economic values of the traits by 25% and 50%. The performance index (305DMY, DO and LNG) was found to be the best index before as well as after excluding days suffered by the animals, but in later case emphasis to be given to different traits was found to be more balanced. The best index indicated that about 47, 42 and 11% relative emphasis to be assigned to 305 days milk yield, days open and longevity for selection of Sahiwal animals for sustainable genetic improvement.


Asunto(s)
Cruzamiento/economía , Bovinos/genética , Industria Lechera/economía , Animales , Cruzamiento/normas , Bovinos/fisiología , Femenino , Fertilidad/genética , India , Lactancia/genética , Longevidad/genética , Reproducción/genética
16.
Trop Anim Health Prod ; 53(1): 70, 2021 Jan 04.
Artículo en Inglés | MEDLINE | ID: mdl-33398462

RESUMEN

Animal's well-being, growth, and production are modulated by environmental conditions, and managemental practices and can be deleteriously affected by global warming phenomenon. In the recent years, unprecedented climatic fluctuations like sustained higher temperatures and humidity, heat waves, and solar flares have led to economic losses in $ billions to both milk and meat industry. It is estimated that by 2050, the US dairy industry alone will borne more than $1.7 billion loss. As human dependency on animal products like milk, meat, and eggs for nutrition is exponentially rising, there is urgency for maximum production. The high yielding animals are already under tremendous metabolic pressure making them more susceptible to adverse climatic conditions. When exposed to heat stress, livestock display a variety of behavioral and physiological acclimatization as essential survival strategies, but at the cost of decreased milk, meat, or egg production. Most of the studies have explored the heat stress in animals and its effect on different milk productions in a specific region or country. A clear understanding of the impact of global warming on dairy enterprise is yet to be comprehended. So this exploratory study will analyze impact of global warming on current milk production trends, economics, and future perspectives.


Asunto(s)
Bovinos/fisiología , Industria Lechera , Cabras/fisiología , Respuesta al Choque Térmico , Leche/metabolismo , Oveja Doméstica/fisiología , Animales , Industria Lechera/economía , Industria Lechera/estadística & datos numéricos , Industria Lechera/tendencias
18.
Vet Q ; 41(1): 107-136, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-33509059

RESUMEN

Mastitis (intramammary inflammation) caused by infectious pathogens is still considered a devastating condition of dairy animals affecting animal welfare as well as economically incurring huge losses to the dairy industry by means of decreased production performance and increased culling rates. Bovine mastitis is the inflammation of the mammary glands/udder of bovines, caused by bacterial pathogens, in most cases. Routine diagnosis is based on clinical and subclinical forms of the disease. This underlines the significance of early and rapid identification/detection of etiological agents at the farm level, for which several diagnostic techniques have been developed. Therapeutic regimens such as antibiotics, immunotherapy, bacteriocins, bacteriophages, antimicrobial peptides, probiotics, stem cell therapy, native secretory factors, nutritional, dry cow and lactation therapy, genetic selection, herbs, and nanoparticle technology-based therapy have been evaluated for their efficacy in the treatment of mastitis. Even though several strategies have been developed over the years for the purpose of managing both clinical and subclinical forms of mastitis, all of them lacked the efficacy to eliminate the associated etiological agent when used as a monotherapy. Further, research has to be directed towards the development of new therapeutic agents/techniques that can both replace conventional techniques and also solve the problem of emerging antibiotic resistance. The objective of the present review is to describe the etiological agents, pathogenesis, and diagnosis in brief along with an extensive discussion on the advances in the treatment and management of mastitis, which would help safeguard the health of dairy animals.


Asunto(s)
Mastitis Bovina/diagnóstico , Mastitis Bovina/microbiología , Mastitis Bovina/terapia , Animales , Antibacterianos/uso terapéutico , Bacterias , Bovinos , Industria Lechera/economía , Farmacorresistencia Bacteriana , Femenino , Mastitis Bovina/patología
19.
Prev Vet Med ; 186: 105210, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33246604

RESUMEN

Paratuberculosis or Johne's disease (JD) prevalence in Australia is low at the cow-level with varying herd-level prevalence. Control strategies incorporating vaccination are limited, suggesting opportunities for changes in regulatory oversight. In order to study this further, we examined the economic benefits of participation in JD control programmes in Australia with and without vaccination as well as knowledge, attitudes, and practices (KAP) relating to JD. We used an online questionnaire to gather information describing demographics and KAP from 71 Australian dairy farms. Data from fully completed questionnaires from 32 farms in Victoria, Australia combined with cost and revenue data averaged from several years of the Dairy Farm Monitor Project were used to then simulate a larger robust dataset. These production data informed the simulation model to establish farm profitability. A partial farm budget was then developed to estimate the benefits of engaging in JD control activities. Respondents who stated they participated in JD control programmes gained an additional $43.80/cow/year net income (profit) compared to non-participants. Respondents also using a JD vaccine gained an additional $35.84/cow/year over non-users; this represents $10.56/cow/year over and above the average producer in the industry. However, we also noted that there clearly exists a barrier between farmers stated intentions to participate and actual participation in JD control activities. These significant differences in net income realized by farms using different approaches to JD control (in this case, adoption of vaccination) offer a starting point from which to explore questions of how much farmers would be willing to pay for control activities, why they are willing to pay, and the likelihood of participating. Communication of the benefits of participation needs to improve to bridge this gap between farmers stated intentions and their actions. Simulation modelling suggests increased profitability from participation in JD control programs and vaccination in Australia. The JD regulatory policies of other countries may benefit from the Australian experience with JD control.


Asunto(s)
Enfermedades de los Bovinos/prevención & control , Industria Lechera/economía , Paratuberculosis/prevención & control , Animales , Bovinos , Enfermedades de los Bovinos/microbiología , Femenino , Paratuberculosis/microbiología , Victoria
20.
J Dairy Sci ; 104(1): 471-485, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33189276

RESUMEN

Our objective was to evaluate cash flow for dairy heifers managed for first service with programs that relied primarily on insemination at detected estrus (AIE), timed AI (TAI), or a combination of both. Holstein heifers from 2 commercial farms were randomized to receive first service with sexed semen after the beginning of the AI period (AIP) at 12 mo of age with 1 of 3 treatments: (1) PGF+AIE (n = 317): AIE after PGF2α injections every 14 d (up to 3) starting at the beginning of the AIP; heifers not AIE 9 d after the third PGF2α were enrolled in the 5d-Cosynch (5dCP) protocol; (2) ALL-TAI (n = 315): TAI after ovulation synchronization with the 5dCP protocol; and (3) PGF+TAI (n = 334): AIE after 2 PGF2α injections 14 d apart (second PGF2α at beginning of AIP). If not AIE 9 d after the second PGF2α, the 5dCP protocol was used for TAI. After first service heifers were AIE or received TAI after the 5dCP with conventional semen. Individual heifer cash flow (CF) for up to a 15-mo period (d 0 = beginning of AIP) was calculated using reproductive cost (rearing only), feed cost (rearing only), income over feed cost (lactation only), calf value, operating cost, and with or without replacement cost. A stochastic analysis with Monte Carlo simulation was used to estimate differences in CF for a range of market values for inputs and outputs. Time to pregnancy for up to 100 d after the beginning of the AIP was analyzed by Cox's proportional regression, binary data with logistic regression, and continuous outcomes by ANOVA. Time to pregnancy (hazard ratio and 95% CI) was reduced for the ALL-TAI versus the PGF+AIE treatment (1.20; 1.02-1.42), but it was similar for ALL-TAI and PGF+TAI (1.13; 0.95-1.33) and the PGF+AIE and PGF+TAI treatments (1.07; 0.91-1.25). The proportion of heifers not pregnant by 100 d did not differ (PGF+AIE = 7.0%; PGF+TAI = 6.5%; ALL-TAI = 6.8%). When including replacement cost, CF ($/slot per 15 mo) differences were $51 and $42 in favor of the PGF+TAI and ALL-TAI compared with the PGF+AIE treatment, and $9 in favor of the PGF+TAI compared with the ALL-TAI treatment but did not differ statistically. Excluding heifers that were replaced to evaluate the effect of timing of pregnancy differences only, the difference in CF between the PGF+AIE with the PGF+TAI and ALL-TAI treatment was the same (i.e., $15) and favored the programs that used more TAI, but also did not differ statistically. Stochastic simulation results were in line with those of the deterministic analysis confirming the benefit of the programs that used more TAI. We concluded that submission of heifers for first service with TAI only or TAI in combination with AIE generated numerical differences in CF of potential value to commercial dairy farms. Reduced rearing cost and increased revenue during lactation increased CF under fixed (not statistically significant) or simulated variable market conditions.


Asunto(s)
Bovinos , Industria Lechera/economía , Industria Lechera/organización & administración , Inseminación Artificial/veterinaria , Reproducción , Animales , Industria Lechera/métodos , Granjas , Femenino , Lactancia , Embarazo , Factores de Tiempo
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