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Rabbit production under poluted environmental conditions: 6. effect of lead pollution on rabbits performanceand its alleviation using natural clay during mature period
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Abstract: One experiment was performed to evaluate some productive, reproductive, physiological, and biochemical capabilities of mature New-Zealand White (NZW) rabbits fed diets contaminated by lead acetate and a diet containing natural clay in addition to lead acetate. The experiment was lasted for three months and carried out on 27 sexual mature bucks and 165 monoparous does of 6- month age. All the animals in the experiment were divided into three comparable experimental groups. The first group was fed a commercial diet (control diet), while the 2nd and 3rd groups were fed the control diet supplemented with 0.075 % lead acetate and 0.075 % lead acetate + 1.5% natural clay, respectively.
Feeding growing NZW male rabbits on diets contaminated with 0.075% lead acetate was associated with an increase in age at first mating and a significant decrease in live body, gonads and pituitary gland weights, scrotal circumference and testicular index at first mating.
As the diet supplemented by 0.075% lead acetate, libido and physical semen quality of bucks were decreased associated with an increase in enzymatic activity of semen. Diluted semen quality ejaculated from NZW bucks fed diets contaminated by 0.075% lead acetate was decreased, during the storage at refrigeration and incubation temperatures. Also, sperm penetration into estrus cow cervical mucus was decreased, while the total bacterial count of diluted semen was increased in diets contaminated by lead acetate. Sexual hormones and mating activity were decreased, while body-thermoregulations were increased in diet contaminated by lead acetate.
Regarding doe fertility traits, kindling rate, litter size and weight at birth, bunny weight at weaning, milk yield and compositions were decreased and pre-weaning mortality rate was increased in does fed diets contained 0.075% lead acetate.
In practice, adding 1.5% natural clay to the diets contaminated by 0.075% lead acetate induced significant improvements in most parameters studied and these improvements were also significantly reduced in the control diet.
Keyword: Rabbits- lead- natural clay- growth- carcass- blood- semen quality.
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| Publication year |
2010
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| Pages |
599-611
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| Availability location |
معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
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| Organization Name |
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| City |
اسيوط
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| serial title |
The 6th International Conference on Rabbit Production in Hot Climate
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| Author(s) from ARC |
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| External authors (outside ARC) |
سمير المولا
(قسم المخ و الأعصاب، كلية الطب البشرى، جامعة عين شمس )
عزيز عبد العزيز
(قسم النساء و التوليد، كلية الطب البشرى، جامعة الأزهر)
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| Agris Categories |
Animal physiology - Reproduction
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AGROVOC
TERMS |
Blood.
Carcass composition.
Growth.
Lead.
Rabbits.
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| Proposed Agrovoc |
semen quality;natural clay;
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| Publication Type |
Conference/Workshop
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