Growth performance and changes in physiological, metabolic and hematological parameters due to outdoor heat stress in hair breed male lambs finished in feedlot

Nicolás-López, Porfirio; Macías‐Cruz, Ulises; Mellado, Miguel; Correa‐Calderón, Abelardo; Meza-Herrera, C.A.; Avendaño‐Reyes, Leonel

doi:10.1007/s00484-021-02116-x

Cited by 18 publications

(13 citation statements)

References 26 publications

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“…HS reduced RBC count, PCV, and Hb concentration in the current research, which is consistent with recent results on heat stress in sheep (Ellamie et al, 2020;Nicolás-López et al, 2021). Although these findings could be explained by hemodilution, the current research suggests that HS may also enhance erythrocytic OS, which can lead to erythrocytic damage.…”

Section: Highersupporting

confidence: 92%

Effect of Hot Dry Environment on the Oxidative Stress Indices in Male Barki Lambs

SALEH¹,

RATEB²,

Abd-Allah

et al. 2022

Assiut Veterinary Medical Journal

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Heat stress (HS) is the main challenge facing livestock health. The present work aimed to study the oxidative stress status in the blood of desert Barki lambs during the hot dry season in El-Kharga oasis in the western Egyptian desert. Twenty-four male Barki lambs (4-5 months) were included in this study. Twelve of them were selected during July (hot dry, HS group) and the remaining 12 animals were selected during December (thermoneutral, TNgroup) as controls. Temperature humidity index (THI) registered 65.4 (satisfactory) in winter and 89.6 (risky HS) in summer. Compared to controls, increased rectal temperature (P < 0.001) and respiration rate (P < 0.001) were detected in the HS group. Red blood cells count (P < 0.001), packed cell volume (P < 0.01) and hemoglobin concentration (P < 0.001) were reduced in HS group. Increased total peroxides (TPx, P < 0.05), the free radical superoxide anion (P < 0.05) and decreased total antioxidant capacity (TAC, P < 0.05) were shown in plasma of the HS group. Malondialdehyde concentration as an indicator of lipid peroxidation was increased (P < 0.05) but superoxide dismutase activity was decreased (P < 0.05) in the erythrocyte of the HS group. Oxidative stress index (OSI, TPx/TAC ratio) increased (P < 0.05) in HS group. In conclusion, HS is associated with oxidative stress and corpuscular redox imbalance in lambs under tropical conditions.

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Section: Highersupporting

confidence: 92%

Effect of Hot Dry Environment on the Oxidative Stress Indices in Male Barki Lambs

SALEH¹,

RATEB²,

Abd-Allah

et al. 2022

Assiut Veterinary Medical Journal

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“…efecto directo y no por una reducción en el consumo de alimento como sucede en razas no adaptadas (Macías-Cruz et al, 2013;. Esto se asocia ajustes en el metabolismo de energía, los cuales evitan el catabolismo y promueven el anabolismo a una tasa más lenta como la disponibilidad de energía dietaria es direccionada mayormente a cubrir requerimiento de mantenimiento que están incrementados por la activación de los mecanismos de termorregulación (Nicolás-López et al, 2021). El difosfato de tiamina (DT), la forma activa de la vitamina B1, funciona como una coenzima glucogénica que actúa en el metabolismo intermedio para hacer más eficiente el proceso de producción de ATP´s a nivel de glucolisis y ciclo de Krebs, al mismo tiempo que modera la gluconeogénesis al ser un mecanismo ineficiente de producción de ATP´s (Manzetti et al, 2014).…”

Section: Resultados Y Discusiónunclassified

Comportamiento productivo de corderos y corderas alimentadas con un cofactor glucogénico bajo condiciones de estrés por calor

Cristóbal¹,

Cedillo²,

Lozano

et al. 2022

ALPA

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This study aimed to evaluate the dietary effect of the thiamine diphosphate (TD) glycogenic cofactor on the productive performance of male (M) and ewe (E) lambs exposed to outdoor conditions natural conditions of high summer temperatures in an arid region. Twenty 4month-old Dorper x Katahdin sheep were used, which were assigned to the following treatment combinations (n=5) according to a 2 2 -factorial arrangement under a randomized complete block design: 1) M without TD, 2) M with TD, 3) H without TD and 4) H with TD. No productive performance variable was affected (P>0.05) by the interaction or the DT main effect. M-lambs had higher (P>0.05) growth rate, feed intake and final weight than E-lambs. It is concluded that, regardless of the sex, DT does not improve productive performance of feedlot hair sheep under heat stress.

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“…However, the expected reduction in DMI for feedlot lambs subjected to an ambient temperature of 30 °C is 12% [ 31 ]. The DMI of hairy lambs may be less impacted by ambient heat load [ 32 ] with no differences in DMI observed for Dorper × Kathahdin lambs during winter or summer months in a semiarid environmental [ 32 , 33 ]. However, Macías-Cruz et al [ 29 ] observed a moderate DMI reduction (8.3%) when comparing Dorper × Pelibuey lamb growth performance for spring (THI = 68.12) vs. summer (THI = 81.80) months in a semiarid environment.…”

Section: Discussionmentioning

confidence: 99%

The Effects of Single or Combined Supplementation of Probiotics and Prebiotics on Growth Performance, Dietary Energetics, Carcass Traits, and Visceral Mass in Lambs Finished under Subtropical Climate Conditions

Zapata-Ramírez

Castro-Pérez

Urías-Estrada

et al. 2021

Biology

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The aim of this trial was to test the effects of the use of eubiotics (pro- and prebiotics) alone or in combination in the diet of lambs finished under subtropical climate conditions. For this purpose, 40 Pelibuey × Katahdin lambs (29.5 ± 4.8 kg initial live weight) were used in a 93 day growth-performance experiment. Dietary treatments consisted of a cracked corn-based finishing diet supplemented with (1) no eubiotics (control), (2) 3 g of probiotics (live Saccharomyces cerevisiae, SC), (3) 3 g of prebiotics (mannan oligosaccharide plus b-glucans, MOS), and (4) a combination of 1.5 g of SC and 1.5 g of MOS (SC+MOS). Throughout the study, the average temperature humidity index (THI) was 78.60. Compared to controls, supplementation with SC or MOS, alone did not affect average daily gain (ADG), but enhanced feed efficiency by 5.6% and 6.9% (gain-to-feed ratio, G:F) and dietary net energy by 4.6% and 5.9%, respectively. Compared to controls, SC+MOS enhanced ADG (10%), G:F (9.5%), and dietary net energy (7.2%). Lambs fed SC+MOS had also greater ADG, G:F, and dietary net energy compared to lambs fed SC alone. When compared to MOS, the combination enhanced ADG (10.4%, p = 0.04). This effect could be attributed to the increased dry matter intake (7.6%, p = 0.06), as neither G:F nor dietary energy was significantly affected. Compared with controls and SC, supplementation with MOS alone and SC+MOS increased kidney–pelvic–heart fat, while SC supplementation tended (p = 0.08) to reduce 4.1% the relative intestinal mass (as a proportion of empty body weight) when compared to controls. Treatment effects on the other carcass measures were not significant. In the present study, supplemental probiotics and/or prebiotics improved dietary energetic efficiency in lambs finished under subtropical climatic conditions. The combination of probiotics with prebiotics reinforced this positive effect.

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Growth performance and changes in physiological, metabolic and hematological parameters due to outdoor heat stress in hair breed male lambs finished in feedlot

Cited by 18 publications

References 26 publications

Effect of Hot Dry Environment on the Oxidative Stress Indices in Male Barki Lambs

Effect of Hot Dry Environment on the Oxidative Stress Indices in Male Barki Lambs

Comportamiento productivo de corderos y corderas alimentadas con un cofactor glucogénico bajo condiciones de estrés por calor

The Effects of Single or Combined Supplementation of Probiotics and Prebiotics on Growth Performance, Dietary Energetics, Carcass Traits, and Visceral Mass in Lambs Finished under Subtropical Climate Conditions

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