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Veerasamy Sejian

Veerasamy Sejian
Rajiv Gandhi Institute of Veterinary Education and Research Puducherry

M.V.Sc & PhD

About

382
Publications
248,314
Reads
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4,806
Citations
Introduction
Dr Veerasamy Sejian's current research is focused on identifying molecular markers for different environmental stresses in small ruminants with the primary focus to develop agro-ecological zone specific thermo-tolerant breeds. Dr Sejian has published 149 peer reviewed research/review articles, 91 book chapters, 269 invited/lead papers, 170 conference papers and 20 technical manuals. His h-index is 33 and Dr Sejian is listed in world top 2% scientists by Standford University, USA
Additional affiliations
August 2015 - February 2016
The University of Queensland
Position
  • Endeavour Research Fellow (Post Doc)
June 2012 - December 2017
National Institute of Animal Nutrition and Physiology
Position
  • Senior Researcher
April 2010 - June 2010
The Ohio State University
Position
  • Researcher
Education
September 2003 - December 2006
Indian Veterinary Research Institute
Field of study
  • Stress Physiology of Goat
November 2001 - August 2003

Publications

Publications (382)
Article
Full-text available
The effects of climate change on humans and other living ecosystems is an area of on-going research. The ruminant livestock sector is considered to be one of the most significant contributors to the existing greenhouse gas (GHG) pool. However, there are opportunities to combat climate change by reducing the emission of GHGs from ruminants. Methane...
Article
Full-text available
There is considerable research evidence showing substantial decline in animal performance inflicting heavy economic losses when subjected to heat stress. With the development of molecular biotechnologies, new opportunities are available to characterize gene expression and identify key cellular responses to heat stress. These tools will enable impro...
Poster
An attempt to comprehend the status of the factors driving adoption of technologies with specific reference to goat farming in the changing climate scenario was studied through narrative literature review and meta-analysis. Review of past studies suggests that the extension system which involves technology transfer activities suffers with limitatio...
Poster
Full-text available
An attempt to comprehend the status of the factors driving adoption of technologies with specific reference to goat farming in the changing climate scenario was studied through narrative literature review and meta-analysis. Review of past studies suggests that the extension system which involves technology transfer activities suffers with limitatio...
Article
An attempt to comprehend the status of factors driving adoption of technologies with specific reference to goat farming in the changing climatic scenario was studied through narrative literature review and meta-analysis. Review of past studies suggests that the extension system suffers with limitations of financial and man-power resources. Addition...
Article
Full-text available
This study aimed to estimate the changes in the milk yield, milk fat, energy indicators [NEFA, BHBA, Dry Matter Intake (DMI) and Body Condition Score (BCS)] and concentration of innate immune molecules (Haptoglobin: Hp, Serum Amyloid A: SAA, TLR-4, TNF-α, IL-1β, IL-6, and IL-8), during the transition period in primiparous and multiparous dual-purpo...
Article
A study was carried out to evaluate the effect of heat stress on carcass traits and expression of Myostatin,Heat Shock Protein (HSP) 70 and HSP110 expression in skeletal muscle of Kanni Aadu goat. Twelve female (one year old) Kanni Aadu goats were randomly allocated into two groups of six animals each, control (KC) goats were placed in the thermo n...
Article
An in vivo study aiming to investigate the rumen methanogens community structure was conducted in Mandya sheep fed on straw and concentrate diet. The ruminal fluid samples were collected and processed for unravelling the rumen microbiota and methanogens diversity. Further, the daily enteric methane emission and methane yield was also quantified usi...
Article
Full-text available
Among all livestock systems in tropical regions, the dairy sector is facing huge challenges to sustain productivity under the rapidly changing climatic conditions. To date, there is a lack of knowledge on the combined effects of climate, season, and farm location on trait responses in different cattle breeds. Consequently, this study presents a nov...
Chapter
The negative effects of climate change on livestock production was mediated predominantly through the indirect impacts such as sudden disease outbreaks, less feed and water available as well as shrinking pasture lands. Therefore, it is very essential for the scientific community to identify the best species among the livestock which could cope with...
Research
India possesses vast genetic resources in terms of holding several indigenous breeds of goats. This review highlights the climate resilient potential of various indigenous goat breeds in the Indian sub-continent. Given the fact of goat being projected as ideal climate resilient species, the information in this review could be very useful for the po...
Chapter
Climate change is inevitable and thus there is an immediate need to plan for the future amelioration and mitigation strategies to sustain livestock production. This chapter is therefore aimed to shed some light on few supreme strategies that need to be considered while planning to tackle future climate change effects in livestock sector. To begin w...
Chapter
Climate change and food security are the two primary issues that daunt agricultural researchers across the globe. The world is battling to find solution to both these issues as we need to feed the expected human population of over 9.6 billion by 2050. Therefore, it is very vital to sustain agricultural production and livestock sector is particularl...
Chapter
Climate change directly impacts food production system stability, domestic or through the global food market. This threat necessitates the identification of various measures to sustain agricultural production to meet the growing population’s demand. Among agricultural sectors, livestock has the potential to fortify resilience to climate change, as...
Chapter
The main focus of our research lies on livestock-environment interactions and how heat load in dairy cows can be measured. Several studies have used animal-related parameters to measure heat stress in individual cows. In this report, an overview of different heat stress indicators is given, focusing on non-invasive indicators that analyze different...
Chapter
This chapter addresses in detail the various impacts of climate change on livestock production and welfare. Among all the environmental stressors, heat stress is of major concern as it has the most deleterious impact on livestock production especially in tropical countries which hold a major proportion of the world’s livestock population. One of th...
Book
Full-text available
This book describes the importance of sustainable livestock production from a food security perspective in the changing climate scenario. It covers the amelioration of climate change impacts and describes the various mitigation strategies to reduce enteric methane emissions. The book targets sustainable livestock production by covering diverse conc...
Chapter
This chapter is an attempt to collect and synthesize information pertaining to climate change associated feed production constraints for livestock and also addresses in detail the various concepts associated with climate resilient livestock production. The chapter would give an overview on the subject and the information generated and presented sho...
Article
Increasing water scarcity and simultaneously growing demands for food and feed challenge agricultural production. Globally livestock feed sourcing is one of the major causes for water depletion, therefore increasing livestock water use efficiency (LWUE) is necessary. In this direction, primary data was collected from 240 small and medium sized dair...
Article
Full-text available
Background Antioxidant intakes are one of the most cherished dietary approaches for the management of oxidative stress-induced liver damages. These antioxidants exist as the bioactive compounds present in plants and other natural sources functioning in varieties of ways from acting as direct scavengers of the free radicals to acting as the modifier...
Article
Full-text available
This experiment was conducted to study the effect of a prolonged hot period on the fatty acid (FA) composition in blood serum of dairy cows. Eighteen multiparous Holstein cows were randomly assigned to the hyperthermia group (HYP, n = 8) in August (summer season) and the control group (CON, n = 10) in October (autumn season). Blood from animals of...
Article
Full-text available
A study was conducted to assess the impact of heat stress on various carcass traits, meat quality variables and gene expression patterns which governs meat quality in indigenous female Kodi Aadu breed. The study was conducted for 45 days in climate chamber with 12 animals randomly allocated into two groups of six animals each, KC (n=6; Female; Cont...
Article
A study was conducted to assess the different proportions of protein energy ratio on the adaptive capabilities of Salem Black goats based on changes in both phenotypic and selective genotypic traits. Forty adult Salem Black does (average body weight (BW) 16.0 kg) were divided into five groups, GI (n = 8; ICAR recommended; crude protein (CP) 80 g an...
Article
Full-text available
Climate change is an imminent threat to livestock production. One adaptation strategy is selection for heat tolerance. While it is established that the ATP1A1 gene and its product play an important role in the response to many stressors, there has been no attempt to characterize the sequence or to perform expression profiling of the gene in product...
Article
Full-text available
An in vivo study was conducted to compare the enteric methane emissions and diversity of ruminal methanogens in cattle and buffaloes kept in the same environment and fed on the same diet. Six cattle and six buffaloes were fed on a similar diet comprising Napier (Pennisetum purpureum) green grass and concentrate in 70:30. After 90 days of feeding, t...
Article
Full-text available
In the agriculture sector, livestock are considered extremely resilient to climate change and are tipped to play a significant role in ensuring food security to meet the increased demands of growing human population by 2050. Compared to other domestic species, goats are considered the ideal animal model for climate change due to its high thermal an...
Article
The study was conducted to assess the effect of heat stress on the meat production and quality variables in indigenous Malabari breed goats. The study was conducted during 45 days using twelve 10 months to one year old Malabari goats. The goats were randomly allocated into two groups: MC (n = 6; Malabari control) and MHS (n = 6; Malabari Heat stres...
Article
In the last decades, livestock species have been severely affected by heat stress because of increasing temperatures, which has threatened animal welfare and decreased production. Based on thermal comfort indices and ensemble climate projections, we analyzed the current and future global spatiotemporal patterns of the heat exposure of cattle in 10...
Article
In the agriculture sector, livestock are considered extremely resilient to climate change and are tipped to play a significant role in ensuring food security to meet the increased demands of growing human population by 2050. Compared to other domestic species, goats are considered the ideal animal model for climate change due to its high thermal an...
Article
Full-text available
Seasonality affects milk production, its composition, as well as the spread of mastitis in dairy cows. The aim of the research work was to study the way the seasons affect milk productivity and the manifestation of mastitis among Ukrainian brown Swiss cows at a commercial dairy unit, with the animals kept in naturally ventilated premises. The relat...
Article
Aflatoxins (AFs) are a class of mycotoxins produced by the toxigenic Aspergillus fungi and are common contaminants of foods and feeds. Aflatoxin B1 (AFB1), the most potent aflatoxin, is well characterized to reduce productive performance and mortality in broilers. This exclusive review summarizes the efficacy of various plant products and phytochem...
Preprint
Full-text available
Establishing the functional significance of rumen microbiome during heat stress may provide crucial information for elucidating climate resilience in goat. The current study was thus designed with an aim to assess the impact of heat stress on the rumen microbiome across three indigenous goat breeds. To prove this hypothesis, six experimental groups...
Article
Full-text available
The current changing climate trend poses a threat to the productive efficacy and welfare of livestock across the globe. This review is an attempt to synthesize information pertaining to the applications of various genomic tools and statistical models that are available to identify climate-resilient dairy cows. The different functional and economica...
Article
Full-text available
Citation: Sejian, V.; Silpa, M.V.; Reshma Nair, M.R.; Devaraj, C.; Krishnan, G.; Bagath, M.; Chauhan, S.S.; Suganthi, R.U.; Fonseca, V.F.C.; König, S.; et al. Heat Stress and Goat Welfare: Adaptation and Production Considerations.
Article
Background: Healthy omega-3 fatty acid (n-3FA) enriched poultry meat can be achieved through dietary supplementation of n-3 FA rich feed ingredients like fish meal, linseed, linseed oil, marine algae, etc to broiler birds. A study was conducted to investigate the effect of supplementing linseed oil (LO) in combination with natural antioxidants like...
Chapter
Goats are projected as an ideal climate adapted animal because of the various advantages associated with this species such as higher thermo-tolerance, drought tolerance, ability to survive on limited pastures, and high disease resistance. With the projected climate associated adversities such as high temperature, shrinking grazing lands, less feed,...
Article
Full-text available
Background Milk is an important high-quality animal protein source in low- and middle-income countries (LMICs). Although the true ileal digestibility and absorption of milk has been shown to be high in French adults, this may be lower in individuals from LMICs who are at risk of environmental enteropathy. Objective To determine the true ileal indi...
Chapter
Full-text available
A healthy gastro intestinal system is important for poultry to achieve its maximum production potential. This paper aims gut health and immunity to improve production in the poultry sector. Genetics, Nutrition and Bio security ate the factors influences the production. Gut consisting of various pH and micro biota throughout is an advantageous featu...
Article
Heat stress is one of the greatest challenges for the global livestock industries as increased environmental temperature and humidity compromises animal production during summer leading to devastating economic consequences. Over the last 30 years, significant developments have been achieved in cooling and provision of shade and shelter to mitigate...
Article
Full-text available
Climate change is one of the most serious issues faced by the global community of the present era. Hence, maximum, minimum and average temperatures for the period 1986 to 2016 collected from the Department of Agricultural Meteorology, Kerala Agricultural University (KAU), Vellanikkara were analysed to study the change in climate over years of Thris...
Chapter
Animals use behaviour to alleviate the feelings of hot and cold, by avoiding situations that arouse those feelings. That is the basis of behavioural thermoregulation. By employing behavioural thermoregulation, domestic animals can manipulate heat exchanges between body surface and surrounding environment, thus reducing demands for evaporative water...
Chapter
Climate change associated heat stress seems to be one of the major factors which negatively influence the livestock production. Hence more intensified research efforts are needed to identify strategies to ameliorate heat stress impact. Since goat has been projected as the most suitable animal model with potential for extreme climate resilience, suc...
Chapter
The livestock sector has evolved enormously over time. The livestock sector not only supports a vast proportion of individuals across the globe; it also ensures food security. Erratically varying climatic conditions along with population growth are leading to serious competition for land and other natural resources. These factors will hamper global...
Article
Full-text available
The objective of this study was to evaluate the effect of Parkia platycephala pod meal (PP) on feeding behavior, rumen health, blood markers, and physiological responses in lactating goats. Eight apparently healthy, adult, multiparous Anglo-Nubian goats, with an average body weight of 42.06±3.5 kg and approximately 52±4 days in lactation, were rand...
Article
Globally, the poultry industry is gaining significant importance among the agricultural and its allied sectors. However, heat stress was found to negatively affect the poultry production particularly in the tropical regions. This review is therefore an attempt to generate information pertaining to the impacts of heat stress on poultry production an...
Article
Full-text available
A study was conducted to compare the adaptive ability of three indigenous goat breeds (Osmanabadi, Malabari, and Salem Black) to heat stress. The primary objective of the study was to assess the thermo-tolerant ability of these breeds to heat stress based on the changes in their blood biochemical response and aldosterone concentration. Thirty six-t...
Article
In this study, we aimed to evaluate the effect of concentrate supplementation containing crude glycerin (CG) before and during the breeding season on the physiological and blood biochemical variables as well as on the reproductive performance of Santa Inês ewes. A total of 24 ewes (12 pluriparous and 12 nulliparous ewes, 4 and 1.5 years old, weighi...
Chapter
The rising global temperature has been a major concern in livestock production as it affects the productive performance of livestock across the globe. Heat stress has been proven to be detrimental to the livestock industry and has resulted in huge economic losses due to reduction in production. Domestic animals exhibit various biological response m...
Conference Paper
Full-text available
Research should not be confined by only monitoring the microclimate in uninsulated sheds (though there are still many tasks left), but now it is more important to predict it and to develop "intelligent" ventilation systems based on mathematical modeling. Our previous studies indicate a high accuracy (> 90%) of predicting the temperature and humidit...
Article
This study aimed to assess the effect of the insulin-like grow factor 1 (IGF-1) treatment during in vitro maturation on the gene expression and developmental ability of ovine oocytes. Ovine cumulus-oocyte complexes (COC) were matured in vitro without (control) or with the supplementation of IGF-1 (100 ng/ml) and then subjected to in vitro fertiliza...
Article
Research efforts of elucidating the molecular mechanisms governing heat shock response which imparts thermo-tolerance ability to indigenous breeds are very scanty. Therefore, a study was conducted with the primary objective to determine the impact of heat stress on the expression pattern of different heat shock response genes in the hepatic tissues...
Article
Full-text available
The study was conducted to establish the differences in the expression pattern of different cell surface toll-like-receptors (TLRs) between indigenous Osmanabadi and Salem Black goats subjected to summer season induced heat stress. The primary objective of the study is to assess the thermo-tolerance ability of these two breeds based on maintaining...
Article
Context. Feedlot cattle can be negatively impacted by hot conditions, such that they have reduced performance and wellbeing. This study was conducted at the research feedlot located at The University of Queensland during a southern hemisphere summer (October to April). Aims. The objective of this study was to evaluate the influence of shade on the...
Article
Full-text available
Animal husbandry serves as a source of provision of high-quality animal protein to the entire world population. Farm animals are exposed to different types of stressors at various stages of their life cycle. The climate change phenomenon also imposes additional stress on the animals due to extreme temperature (heat and cold) and unavailability of f...
Article
The study is to establish the adaptive capabilities of wild and captive Indian Sloth Bear based on changes in the biochemical responses influenced by the gender, age and habitat. The free-ranging and captive sloth bears that were residing in Bannerghatta Bear Rescue Centre, Bangalore, Karnataka, India were chosen for this study. An analysis of seru...