Effects of heat stress on growth, some blood variables and lipid oxidation in broilers exposed to high temperature at an early age

Altan, Özge; Altan, Ali; Oğuz, İsmail; Pabuççuoğlu, Aysun; Konyalιoğlu, Sibel

doi:10.1080/713654965

Cited by 74 publications

(46 citation statements)

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“…This finding corroborates with Altan et al (2000) and Minka & Ayo (2008), who found an increase in H/L ratios when the birds were subjected to heat and transportation stress. Likewise, Nworgu et al (2007) and Minka & Ayo (2008) observed that the values of TLC and H/L ratio were stable when the broilers chickens were treated with anti-oxidant vitamins.…”

Section: H/l Ratiosupporting

confidence: 81%

Effect of Vitamin E Supplementation and High Stocking Density on the Performance and Stress Parameters of Broilers

Selvam

Marimuthu

Suresh

et al. 2017

Rev. Bras. Cienc. Avic.

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The present study was carried out to investigate the effect of dietary supplementation with vitamin E and stocking density on the mortality, body weight gain, feed conversion ratio, European production efficiency factor, heterophil/lymphocyte (H/L) ratio and liver glutathione (GSH) and malondialdehyde (MDA) levels of broilers. In total, 570 one-dayold Vencobb 400 broiler chickens were randomly assigned to three treatments, with six replicates each. G1 served as normal control and birds were provided a normal floor space (0.0465 m 2 /bird from day 1 to 21 and 0.0929 m 2 /bird from day 22 to 42) and basal diet containing vitamin E at 70 g/ton feed (n=150). G2 and G3 birds were subjected to high stocking density (0.0279 m 2 /bird from day 1 to 21 and 0.0557 m 2 / bird from day 22 to 42). G2 served as the high stocking density (HSD) control, birds were offered a basal diet with no vitamin E (n=210), whereas G3 birds were fed a basal diet containing vitamin E at 70 g/ ton feed (n=210). The birds were fed with feed and water ad libitum throughout the study period. The supplementation of vitamin E to the birds subjected to HSD had a positive effect on body weight gain, feed conversion ratio (FCR), European Production Efficiency Factor (EPEF), H/L ratio, and liver GSH and MDA levels with those subjected to HSD and not supplemented with vitamin E. The results of the present study indicate that the supplementation of vitamin E at 70g/ton of feed to broilers subjected to HSD could effectively reverse the negative effects of HSD, and improve broiler performance.

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Section: H/l Ratiosupporting

confidence: 81%

Effect of Vitamin E Supplementation and High Stocking Density on the Performance and Stress Parameters of Broilers

Selvam

Marimuthu

Suresh

et al. 2017

Rev. Bras. Cienc. Avic.

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“…It has also been found to be related to blood glucocorticoids levels (Davis et al, 2008). Therefore, H/L has been used to evaluate the welfare of chickens in stressful environments (Altan et al, 2000). In the present study, the H/L of C1C1 chickens presented a quadratic response (p<0.05) and C1C2 and C2C2 a cubic response (p<0.05) under heat stress (Figure 4d).…”

Section: Effect Of Hsp70 Genotypes On Hematological Responsementioning

confidence: 57%

“…Due to their lower tolerance to heat, the mortality rate of commercial broilers (46.0%) was extremely high, whereas it was only 2% in native chickens (2%). Reduced feed intake and growth performance due to heat stress has been documented in several reports (Mehta & Singari, 1999;Yuming et al, 1999;Altan et al, 2000;Oliveira et al, 2000;Temim et al, 2000;Deeb & Cahaner, 2001;Xin et al, 2002).…”

Section: Hsp70 Genotypes and Heat Tolerance Of Commercial And Native mentioning

confidence: 99%

“…In the poultry industry, heat stress is responsible for the morbidity and mortality of one million broilers per month (Guerreiro et al, 2004). Several recent reports show that heat stress adversely affects feed intake (Cooper & Washburn, 1998), water intake (Bruno et al, 2011), growth performance (Altan et al, 2000;Abu-Dieyeh, 2006), blood variables (Altan et al, 2000;Aengwanich, 2007), electrolytes (Borges et al, 2004), and the immune system (Zulkifli et al, 2000b;Mashaly et al, 2004;Tirawattanawanich et al, 2011), increasing mortality (AlFataftah et al, 2007).The optimal temperature range for commercial broilers is about 21-26 o C (Ewing et al, 1999), and a temperature of 32 o C causes heat stress (Daghir, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Hsp70 Genotypes and Heat Tolerance of Commercial and Native Chickens Reared in Hot and Humid Conditions

Duangjinda

Tunim

Duangdaen

et al. 2017

Rev. Bras. Cienc. Avic.

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Heat tolerance in poultry production was obtained attention due to the need for genetic lines that can withstand climate changes. This study aimed at investigating heat tolerance in commercial and native broiler genetics, as well as the physiological and growth performance responses of HSP70 genotypes submitted to heat stress. In Experiment I, heterophil:lymphocyte (H:L) ratio, as an indicator of heat tolerance, was compared between commercial broilers (n = 100) and Thai native chickens (n = 100). Growing chickens (with similar initial weight) of each genetic strain were randomly divided into two groups: 1) thermoneutral environment (26 o C ± 2 o C) and 2) heat stress (36 o C ± 2 o C). The results showed that native chickens originating from a tropical environment presented lower H:L ratio and mortality rate compared with commercial broilers. In Experiment II, HSP70 genotypes were compared. PCR-RFLP was applied to identify the genotypes (C1C1, n = 38; C1C2, n = 38; and C2C2, n = 28). Ten-week-old chickens of each genotype were evaluated in the same environments described in Experiment I. Heat-stress indicators -respiratory rate (RR), cloacal temperature (CT), packed cell volume (PCV), and average daily gain (ADG) -were measured for three weeks. The significant difference in PCV indicated that C2C2 chickens were less tolerant to heat stress compared to other genotypes. The RR, CT, and ADG were not significantly different among all genotypes. Since the C2C2 genotype was shown to be sensitive to heat stress, C1C1 and C1C2 could be used as markers for heat-tolerant genetic strains of Thai indigenous chickens and hybrid commercial lines.

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“…Altan et al (2003) concluded that heat stress increased lipid peroxidation due to increased free radical generation, as indicated by the increased MDA concentration in broilers exposed to heat stress. According to Altan et al (2000), oxidative stress can be considered part of the broiler chicken response to heat exposure.…”

Section: Effects Of Heat Stress On Cell Dynamics Of Broiler Chicken Smentioning

confidence: 99%

Physiology, cell dynamics of small intestinal mucosa, and performance of broiler chickens under heat stress: a review

Marchini

Café

Araújo

et al. 2016

Rev Colomb Cienc Pecu

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Physiology, cell dynamics of small intestinal mucosa, and performance of broiler chickens under heat stress: a review ¤ Fisiología, dinámica celular de la mucosa del intestino delgado y rendimiento de pollos de engorde sometidos a estrés calórico: revisión de literatura Fisiologia, dinâmica celular da mucosa do intestino delgado e desempenho de frangos de corte submetidos ao estresse pelo calor: revisão de literatura SummaryHigh room temperature reduces production efficiency of broiler chickens. Different factors contribute to this situation: fast growth, physiological variations, and changes in the small intestine mucosa. This review aims to define the concept of heat stress and its effects on several physiological aspects related to the development of the small intestine mucosa and the performance of broiler chickens. Heat stress triggers a corticosteroid increase and a circulating triiodothyronine hormone (T 3 ) reduction, increases respiratory frequency, which triggers respiratory alkalosis, diminishes food intake, and leads to changes in the cellular dynamics of the small intestine mucosa. These changes depend on animal genotype, intensity, and duration of the stressor. Acute heat stress leads to a reduction in enterocyte proliferation and also to a decrease in crypt depth, without affecting villus height or villus/crypt ratio. On the other hand, chronic stress diminishes villus height and jejunum weight. These changes affect the capacity of broilers to digest and absorb the nutrients required for maintenance and production. ResumenUna alta temperatura ambiente disminuye la eficiencia de la producción de pollos de engorde. Diversos factores contribuyen a esta situación: crecimiento rápido, cambios fisiológicos, y anomalías de la mucosa del intestino delgado. El objetivo de la presente revisión fue definir el concepto de estrés calórico y sus efectos sobre algunos aspectos de la fisiología, en el desarrollo de la mucosa del intestino delgado, y en el rendimiento de pollos de engorde. El estrés calórico desencadena un aumento de los niveles de corticosteroides, reducción de la hormona triyodotironina (T 3 ) circulante, aumento en la frecuencia respiratoria que resulta en alcalosis respiratoria, disminuye la ingesta de alimentos y provoca cambios en la dinámica celular de la mucosa del intestino delgado. Estos cambios dependen del genotipo del animal y de la intensidad y duración de la acción del factor estresante. El estrés calórico agudo causa una disminución en la proliferación de enterocitos, reducción de la profundidad de las criptas sin cambio en la altura de las vellosidades y en la relación vellosidades/cripta. Ya el estrés crónico disminuye la altura de las vellosidades y el peso del yeyuno. Estos cambios afectan la capacidad del pollo de engorde para digerir y absorber los nutrientes para su mantenimiento y producción. Palabras clave: corticoesteroides, hallazgos microscópicos, hallazgos morfológicos, proliferación de enterocitos, tracto gastrointestinal. ResumoA temperatura ambiente elevada diminu...

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Effects of heat stress on growth, some blood variables and lipid oxidation in broilers exposed to high temperature at an early age

Cited by 74 publications

References 0 publications

Effect of Vitamin E Supplementation and High Stocking Density on the Performance and Stress Parameters of Broilers

Effect of Vitamin E Supplementation and High Stocking Density on the Performance and Stress Parameters of Broilers

Hsp70 Genotypes and Heat Tolerance of Commercial and Native Chickens Reared in Hot and Humid Conditions

Physiology, cell dynamics of small intestinal mucosa, and performance of broiler chickens under heat stress: a review

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