EFFECT OF FEED WITHDRAWAL TO REDUCE THE NEGATIVE EFFECT OF HEAT STRESS ON SOME PHYSIOLOGICAL TRAITS AND PRODUCTIVE PERFORMANCE OF BROILER CHICKEN

Abstract This study was undertaken to evaluate the effect of shelter modifications in the form of floor alteration and heat stress amelioration aids on the biochemical aspects and productive performance of Sahiwal zebu cows. 24 healthy Sahiwal cows in their second or third parity were randomly assigned to four groups (G1, G2, G3, and G4) having 6 cows each and were studied for duration of 150 days from June to November. G1 acted as control without any shelter modification, while G2 cows were housed in stalls with rubber mat covered floors, G3 cows were provided with cooling fans along with water sprinkling twice a day, and G4 cows were housed in stalls combining rubber mat floors with cooling fans and water sprinkling twice a day. This study revealed a significant (p<0.05) effect of shelter modification on milk yield, though no significant effect on milk composition was found. Among blood biochemical parameters, serum cholesterol and cortisol levels registered a significant (p<0.05) effect of shelter modification. The use of heat amelioration aids with, and without rubber mat floors positively influenced the productive and biochemical aspects of Sahiwal cows. Such strategies can be utilized to reduce stress on animals and help in maintaining their production.

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Dietary calcium levels on productive and reproductive traits of european quails

Research Society and Development ◽

10.33448/rsd-v9i1.1723 ◽

2020 ◽

Vol 9 (1) ◽

pp. e111911723

Author(s):

Gabriela Queiroz Faria ◽

Héder José D'Ávila Lima ◽

Leonardo da Silva Costa ◽

Jéssica Amaral Miranda ◽

Graziela Maria Freitas Rocha ◽

...

Keyword(s):

Body Weight ◽

Reproductive Traits ◽

Experimental Period ◽

Dietary Calcium ◽

Feed Consumption ◽

Productive Performance ◽

Coturnix Coturnix ◽

Randomized Experimental Design ◽

Negative Effect ◽

Productive Traits

The objective of this study was to determine the effect of dietary calcium levels on productive and reproductive traits of European male quail (Coturnix coturnix). A total of 60 European male quail, at 35 days of age, weighing 248.9g ± 8.1g were distributed in a completely randomized experimental design with five calcium levels (1.5, 2.0, 2.5, 3.0 and 3.5%), and 12 replicates per treatment (one bird each replicate). The experimental period was 35 to 70 days of age. At 70 days of age, the parameters of male productive traits assessed were: feed consumption, calcium consumption, weight gain and body weight of birds. The reproductive traits analyzed were: hatchability and fertility of eggs. Early, intermediate and late embryonic mortality were also evaluated. The diet containing 3.16% of calcium provides higher percentage of hatched eggs and did not show a negative effect on productive performance of European quails.

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The effects of protein, amino acid, and dietary electrolyte balance on broiler chicken performance and blood parameters under heat stress

Acta Scientiarum Animal Sciences ◽

10.4025/actascianimsci.v38i3.30747 ◽

2016 ◽

Vol 38 (3) ◽

pp. 285 ◽

Cited By ~ 1

Author(s):

Ali Asghar Saki ◽

Mostafa Maleckey ◽

Rahele Johari ◽

Sara Mirzaie Goudarzi ◽

Mansoureh Abdolmaleki

Keyword(s):

Heat Stress ◽

Amino Acid ◽

Broiler Chicken ◽

Blood Parameters ◽

Electrolyte Balance ◽

Protein Amino Acid

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Climate Change and Livestock Fertility

10.4018/978-1-6684-3686-8.ch061 ◽

2022 ◽

pp. 1256-1277

Author(s):

Vishakha Shrimali ◽

Nibedita Naha ◽

Sukanta Mondal

Keyword(s):

Climate Change ◽

Heat Stress ◽

Greenhouse Gases ◽

Follicular Development ◽

Mitigation Strategies ◽

Adaptation To Climate Change ◽

Oocyte Competence ◽

Livestock Sector ◽

Negative Effect ◽

Global Threat

Climate change is a global threat to livestock sector to so many species and ecosystem in different parts of the world. Climate change, heat stress, and nutritional stress are the major intriguing factors responsible for reduced fertility in farm animals in tropical countries. Heat and nutritional stresses affect the reproductive performance by decreasing the expression of estrous behavior, altering ovarian follicular development and hormonal profiles, compromising oocyte competence, and inhibiting embryonic development in livestock. Climate is changed by greenhouse gases that released into atmosphere through man-made activities. Livestock contribute 18% of the production of greenhouse gases itself and causes climate change including heat stress, which has direct and indirect impact on fertility of the animals as well as reduce milk production. Adaptation to climate change and lowering its negative effect by alteration of animal micro-environment using different essential technologies are the main mitigation strategies to recover heat stress damage in this respect.

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Morpho-physiological traits associated with heat stress tolerance in tropical maize (Zea mays L.) at reproductive stage

Australian Journal of Crop Science ◽

10.21475/ajcs.19.13.04.p1448 ◽

2019 ◽

Vol 13 ((04) 2019) ◽

pp. 536-545 ◽

Cited By ~ 2

Author(s):

Jewel Jameeta Noor ◽

M.T. Vinayan ◽

Shahid Umar ◽

Pooja Devi ◽

Muhammad Iqbal ◽

...

Keyword(s):

Heat Stress ◽

Grain Yield ◽

Stress Tolerance ◽

Inbred Lines ◽

Physiological Traits ◽

Optimal Temperature ◽

Tropical Maize ◽

Important Trait ◽

Heat Stress Tolerance ◽

Secondary Traits

Heat stress resilience has emerged as an important trait in maize hybrids targeted for post–monsoon spring cultivation in large parts of South Asia and many other parts of the tropics. Selection based on grain yield alone under heat stress is often misleading, and therefore an approach involving stress-adaptive secondary traits along with grain yield could help in the development of improved, stable heat stress tolerant cultivars. We attempted to identify reliable and effective secondary traits associated with heat stress tolerance in tropical maize and sources of heat stress tolerant germplasm. A panel of 99 elite maize inbred lines representing the wider genetic diversity of tropical maize and a set of 58 elite hybrids were phenotyped under natural heat stress and optimal temperature for grain yield and 15 secondary traits including 10 morpho-physiological traits and 5 yield attributes. Evaluation under natural heat stress was done during the spring season by adjusting the planting date so that the complete reproductive stage (from tassel emergence to late grain filling) was exposed to heat stress. The optimal temperature trial was planted during the monsoon season with no exposure to heat stress at any crop stage. Heat stress significantly affected most of the observed traits. Among the traits studied two yield attributing traits, i.e.- ears per plant (EPP) and kernel per row (KPR), and three morpho-physiological traits, i.e.- chlorophyll content (CC), leaf firing (LF) and tassel blast (TB) were found to be the key secondary traits associated with grain yield under heat stress. In addition, low anthesis-silking internal (ASI) is an important trait that needs to be added in the index selection for heat stress tolerance. The study identified nine promising heat stress tolerant maize inbred lines with desirable secondary traits and grain yield under severe heat stress, which could be used as source germplasm in heat stress tolerance maize breeding program.

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Chronic heat stress regulates the relation between heat shock protein and immunity in broiler small intestine

Scientific Reports ◽

10.1038/s41598-020-75885-x ◽

2020 ◽

Vol 10 (1) ◽

Cited By ~ 1

Author(s):

Sharif Hasan Siddiqui ◽

Darae Kang ◽

Jinryong Park ◽

Mousumee Khan ◽

Kwanseob Shim

Keyword(s):

Body Weight ◽

Small Intestine ◽

Heat Stress ◽

Treatment Group ◽

Heat Shock ◽

Heat Shock Protein ◽

Growth Performance ◽

Control Group ◽

Immune Functions ◽

Negative Effect

Abstract Chronic heat stress is considered to decrease the immune functions which makes negative effect on broiler growth performance. Here, we investigated the relationship between chronic heat stress, growth performance, and immunity in the small intestine of broilers. The study included two groups (control and heat stressed group) with eight replications per group. Ten broilers of 20-day aged were allocated in each replication. On day 35, the treatment group was subdivided into two groups based on their body weights (heavy and low body weight). Although, there was only the control and treatment group on day 28. The growth performance decreased and expression of heat shock protein 70 (HSP70), HSP60, and HSP47 increased on days 28 and 35 in the chronic heat stress group as compared with those in the control group. The expression levels of HSPs were significantly higher in the low body weight group than in the control group. The genes HSP70 and HSP60 were significantly associated with pro- and anti-inflammatory cytokines in the small intestine of the broilers of the treatment group. Thus, HSP70 and HSP60 activated the adaptive immunity in the small intestines of the broilers from the treatment group to allow adaptation to chronic heat stress environment.

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