Effect of ambient temperature on the productive and carcass traits of growing rabbits divergently selected for body fat content

Matics, Zsolt; Gerencsér, Zsolt; Kasza, Rozália; Terhes, K.; Nagy, I.; Radnai, I.; Zotte, Antonella Dalle; Cullere, Marco; Szendrő, Z.

doi:10.1016/j.animal.2020.100096

Cited by 13 publications

(18 citation statements)

References 23 publications

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“…The SW was similar to previous reports [ 2 , 23 ], higher than those presented by Sánchez et al [ 24 ], but lower than those presented by Matics et al [ 25 ]. The variation between the stated averages is due to differences in breeds, temperature, season, slaughter age, and food quality.…”

Section: Resultssupporting

confidence: 91%

“…The variation between the stated averages is due to differences in breeds, temperature, season, slaughter age, and food quality. It has also been shown that ambient temperature over thermoneutrality values reduces feed consumption and, consequently, decreases growth speed [ 25 ]. The CW for the studied rabbits was found within the range of 1,250–1,480 gm/animal, stated by several authors [ 2 , 23 ].…”

Section: Resultsmentioning

confidence: 99%

“…The CW for the studied rabbits was found within the range of 1,250–1,480 gm/animal, stated by several authors [ 2 , 23 ]. However, authors such as Matics et al [ 25 ], Rasskazova et al [ 26 ], and Ayyat et al [ 27 ] found higher CW in a range oscillating between 1,700 and 1,890 gm/animal. Rotımı et al [ 28 ] suggested that the differences in weights before slaughter and in the hot carcass could be attributed to age, sex, breed, feeding conditions, and management to which rabbits are subjected on the farm to the slaughter method.…”

Section: Resultsmentioning

confidence: 99%

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Genetic parameters of growth traits and carcass weight of New Zealand white rabbits in a tropical dry forest area

2021

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Objective: The objective of this study was to estimate the heritability ( h 2 ), repeatability ( r ), and correlations ( r ŷ i y i ) in some traits of zootechnical interest in a population of New Zealand white rabbits of a tropical dry forest area. Materials and Methods: Three mating groups were formed, each one of 1 male and 70 females. The traits evaluated were litter size at birth (LB), born alive (BA), born dead (BD), litter weight born alive (LW), litter weight at weaning (LWW), weaning weight (WW), slaughter weight (SW), and carcass weight (CW). Weaning took place at 42 days, and the fattening phase lasted 60 ± 3 days. A descriptive statistical study was carried out on the study variables. Paternal heritability was estimated ( ) and maternal ( ), repeatability, rabbit index IC, and Pearson’s correlations ( r ŷ i y i ) between traits. The descriptive statistics showed high variation for the BD traits. Results: The values of the productivity found were similar to those presented in studies around the world. h 2 presented magnitudes between low and medium. ranged between 0.09 and 0.42 and between 0.11 and 0.45 for . In general, the values of were higher than the values of . The r values for the traits LB, BA, LW, LWW, and SW presented low magnitude, while it was medium for WW and CW. From the values of r , IC was calculated for each of the rabbits, allowing their categorization, which will be used in future selection plans. r ŷ i y i among the variables ranged from −0.01 to 0.860. They were generally positive and mostly not significant ( p > 0.05); they took a magnitude from low to moderate, except for the correlation between LB and BA. Conclusion: The production of rabbits under tropical conditions is similar to other reports. The genetic parameters evaluated were medium-to-low, indicating a robust non-additive gene and/or environmental effect.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Genetic parameters of growth traits and carcass weight of New Zealand white rabbits in a tropical dry forest area

2021

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“…The animals raised under heat stress had noticeably lost weight, especially during the last two weeks of the experiment, which is in agreement with the findings of the studies of Lakabi (2010), who reported a decrease of 13% in the live weight of local Algerian rabbits aged 11-14 weeks raised in summer, compared to those raised in optimal conditions. Similar results have already been reported in other studies conducted on rabbits of selected breeds during the growing period (Dalle Zotte and Paci, 2014;Terhes et al, 2018;Matics et al, 2021), and on the adult rabbits by Okab et al (2008) and Khaled (2017) confirming that all rabbits show the same response regardless of breed, age or gender. The FCR was significantly higher in HS rabbits (p < 0.05) than in thermoneutrality rabbits during 35-91 days, which can be explained by better feed efficiency in thermoneutrality rabbits.…”

Section: Growth Performancesupporting

confidence: 89%

Effects of Heat Stress on Growth Performance, Carcass Traits, Physiological Components, and Biochemical Parameters in Local Algerian Growing Rabbits

Dahmani¹,

Benali²,

Saidj³

et al. 2022

WVJ

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Heat stress is a detrimental factor affecting the welfare of all livestock, especially rabbits, as they are sensitive to high temperatures. The current study investigated the effect of high ambient temperature on growth performance, slaughter traits, physiological indicators, and some hematological and biochemical parameters in Algerian local growing rabbits. A total of 48 local rabbits of both sexes (35 days old) were allotted into two groups (24 per group). The control group rabbits were exposed to an ambient temperature and humidity, averaging 21.8 ± 1.3°C and 51.7 ± 3.6%, respectively. Rabbits in the heat stress group were subjected to a warm ambient temperature and humidity of 30.5 ± 1.82°C and 65.5 ± 7.2%, respectively. The growth performance was measured and calculated from 35 to 91 days of age. Physiological indicators (rectal, skin, and ear temperatures, respiratory, and heart rates) were examined at 88 days of age. The carcass traits, blood metabolites, and hematological parameters of rabbits were measured and calculated at slaughter (92 days of age). The obtained results indicated a decrease in body weight, daily gain, and daily feed intake of rabbits in heat stress rabbits, compared to the control group. However, feed conversion ratio was significantly higher in the heat stress group, compared to the control. Heat stress group rabbits showed significantly higher blood metabolite levels, except the glycemia, which was similar in both groups. No significant effect of heat stress was found on the carcass yield, anterior, posterior, and intermediate parts of the carcass. However, the yield of the other components of the carcass (liver, kidney, peritoneal and inter-scapular fat) was significantly lower in the heat stress group. In the heat stress group, rectal, skin, and ear temperatures as well as heart and respiratory rates, were significantly higher than those of the control group. In the present experimental conditions, exposure of local rabbits to chronic heat stress could induce some changes to biological, physiological, and biochemical parameters leading to altered growth performance.

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“…In general, high environmental temperatures have a negative impact on animal performance. Rabbits are more sensitive to heat stress than most farm animal species because they have few sweat glands and their body is covered with a thick fur [1][2][3]. In particular, growth performance, reproductive aspects, immunity and health condition are dramatically deteriorated in rabbits raised under heat stress [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Improving productivity in rabbits by using some natural feed additives under hot environmental conditions — A review

Abdelsalam

Fathi

2023

Anim Biosci

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Heat stress is a major challenge to animal production in tropical and subtropical climates. Rabbits suffer from heat stress more than farm animals because they have few sweat glands and their bodies are covered with thick fur. Intensive farming relies on antibiotics as antimicrobials or growth promoters to increase animals' productivity and health. However, the European Union and many countries have banned or restricted the use of antibiotics in animal feed for human health concerns.Several studies have found that replacing antibiotics in rabbit feed with natural plants or feed additives increases productivity and improves immune capacity, especially under heat stress conditions. Growth performance, immune response, gut microflora, and carcass yield may be increased in rabbits fed a diet supplemented with some natural plants and/or propolis. In this review article, we discuss and summarize the effects of some herbs and plant extracts as alternative feed additives on rabbit productivity, especially for those raised under hot ambient temperatures.

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Effect of ambient temperature on the productive and carcass traits of growing rabbits divergently selected for body fat content

Cited by 13 publications

References 23 publications

Genetic parameters of growth traits and carcass weight of New Zealand white rabbits in a tropical dry forest area

Genetic parameters of growth traits and carcass weight of New Zealand white rabbits in a tropical dry forest area

Effects of Heat Stress on Growth Performance, Carcass Traits, Physiological Components, and Biochemical Parameters in Local Algerian Growing Rabbits

Improving productivity in rabbits by using some natural feed additives under hot environmental conditions — A review

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