Local Rabbits Research Articles

FARM ANIMAL GENETIC RESOURCES IN EGYPT: FACTSHEET

SUMMARY Egyptian and international literature shows that Egypt has got more than 60 local and derived breeds of livestock excluding exotic breeds. This enormous number of breeds needs to be verified and refined. Most of these breeds are named in an ad hoc manner according to their geographical location. Since there are only few discriminate characteristics to distinguish many of these breeds, proper phenotypic and genetic characterization is needed to be able to draw objective breeding plans for the utilization and possible conservation of some these valuable genetic resources. Aside from the two local rabbit breeds that have become extinct, Baladi White and Giza White, no local breeds seem endangered yet. However, Baladi cattle and local chicken breeds have suffered greatly from the introductions of exotic breeds due the indiscriminate crossing that usually follows these introductions. From 1991 to 2004, Baladi cattle have lost 19% of their share in the national cattle herd. No figures are available for local chicken breeds but the trend is expected to be more alarming. Livestock production systems in Egypt are under pressure to increase output, especially of animal protein. This pressure is leading to an intensification of the system with little attention paid to sustainability and environmental elements. To monitor the state of animal genetic resources in the country animal census must take the breed into account, approximately initially until some breed standards have been established. Stakeholder networking focused on the characterization and utilization of animal genetic resources is nearly totally absent in the country.

Some physiological effects of a number of plant extracts in experimental diabetes rabbits

This study was designed to examine the effect of aqueous extracts Q$ Cymbopogon citratus Cardaria draba leaves and Artemisia scoparia leaves and seeds on the levels of glucose, cholesterol, triglycrides, total protein and urea in Alloxan-induced diabetic local rabbits, and The results were compared with the effect of Insulin. The effect of the aqueous extracts have been also tested on some blood parameters by measuring the number of Red Blood Corpuscles, White Blood Cells, Packed Cell Volume (PCV) and Hemoglobin. The aqueous extracts of Cymbopogon citratus and Cardaria draba produced significant decreased in glucose, cholesterol triglycrides and urea levels while significantly increased total proteins level of diabetic local rabbits, the aqueous extract of Artemisia scoparia leaves and seeds produced similar effects on the level of glucose, urea and total protein. In diabetic local rabbits the aqueous extracts of Cymbopogon citratus and Cardaria draba showed significant decrease m the number of White Blood Cells and the aqueous extract for Cardaria draba produced a significant increase in the number of Red Blood Corpuscles, whereas the aqueous extract of the Artemisia scoparia leaves and seeds produced no significant effect on the blood components. The results obtained suggest that these extracts may being used for the treatments of Diabetes Mellitus after be sure that there is no side effect.

Study of low power Laser effect on the healing of tibial fracture treated by intramedullary pin in rabbits

The effect of low power laser (LPL) on the healing of distal third of tibial fractures has been studied radiologically. 
 Fractures induced in twenty-five local breed rabbits, immobilization achieved by using Steinman intramedullary pins, which was not removed during the period of study for 7 weeks. 
 Irradiation with LPL was made by direct contact between the source and the site of fracture directly after the operation and then daily for fifteen days. 
 Each fracture was studied radiologically after the first day from the operation until complete healing occurs. 
 This study confirm that the healing of distal third of tibial fracture was very slow in control group and LPL accelerate the process of fracture healing in treated groups. 
 With notice that the surface of fractured bone exposed to the source of laser therapy (medial side) was healed better than the non - exposed surface (lateral side). 
 Finally there was no clear difference between treated groups.

Pengaruh ekstrak nanas (ananas comosus) sebagai agensia bating terhadap kekuatan tarik dan suhu kerut kulit kelinci lokal samak nabati

The aims of experiment were to find out the effects of concentration of pineapple extract, bating time and their interactions on tensile strength and shrinkage temperature of local rabbit skin, which was tanned by vegetable tanning agent. The materials of this experiment were 27 rabbit skins used as bating object. The experimental design used was completely randomized design (CRD) with factorial treatments 3 x 3. The results of analysis showed that concentration of pineapple extract, bating time and their interactions were not significantly affect (P < 0,05) on tensile strength and shrinkage temperature . The average of the tensile strength at this experiment was 157,394 kg/cm 2 and fulfilled the requirement of SNI. 06-0463-1989: Kulit Lapis Doma/Kambing Samak Kombinasi (Krom Nabati), Mutu dan Cara Uji, and shrinkage temperature was 79,70 o C that means fulfilled Nayudama’s (1978) did requirement. Key words : pineapple slurry, tensile strength, shrinkage temperature, rabbit skin.

Selection indexes for improved weaning and marketing body weights of the Burundi local rabbits

Abstract. Estimates of genetic and phenotypic parameters for growth-related traits involving body weights at 4, 6 (weaning), 8 and 10 (marketing) weeks of age and average daily gains from 4- to 6- and 6- to 10-weeks of age (postweaning daily gain) were computed on 193 males of the Burundian local rabbits . Estimates were then used for constructing thirteen selection indexes, involved body weights at 4, 6 and 10 weeks of age and daily gains, to improve body weights of rabbits at weaning and marketing. The use of weaning weight in an index combined with body weight at 4 weeks of age (W4) and posuveaning average daily gain (index12) or postweaning daily gain solely (index2) resulted in a relative efficiency of about 100 % as using weaning weight combined with body weights at 4 and 10 weeks of age (index,) or with marketing body weight (index2) or W4 (index3). The accuracy of selection (rTI) using these indexes ranged between 0.890 and 0.906. They lead to a progress in weaning weight from 77–79 g and in marketing weight from 54–56 g. However, from a practical stand point, selection on index 3, including W4 and weaning weight, or on index 5, including weaning weight alone, could be recommended for improving both weaning and marketing weights of Burundian local rabbits.

Can predators regulate wild Rabbit Oryctolagus cuniculus population density in England and Wales?

ABSTRACTPredation has usually been interpreted as being a compensatory mortality factor, removing only the doomed surplus. The literature on the wild Rabbit Oryctolagus cuniculus L. is reviewed to collate counter‐evidence for a regulating influence of predation. This evidence is almost entirely circumstantial, not experimental. Predation has been reported to extend the length of time Rabbit populations remain low following a significant reduction of Rabbits by some other agent. Rabbit populations have been shown to increase very rapidly when predator density has suddenly been reduced. It has been suggested that predators affect the spread and dispersion of Rabbits both at the geographical and local levels. Predation has not, however, been shown to have an important influence at high Rabbit densities. Thus, its role can be that of a limiting factor rather than a density‐dependent regulatory mortality factor.The concept of predator pressure is presented and discussed, pointing out that there is currently no standard technique used for its measurement.Further evidence on the importance of predation is presented from four recent studies in England and Wales that relate, by association, the distribution and abundance of local Rabbit populations to the local attitude towards predators. Rabbits were found to be significantly more widespread and abundant where predators were removed (not restricted to keepered game estates) or at low density, than when predators were undisturbed or at a high density. The significance of these results is discussed.The circumstantial and corroborative evidence leads strongly to the conclusion that predator pressure can act as an additive rather than compensatory mortality factor in some circumstances, and can thus be a potential regulating factor. Predation is more likely to be a limiting factor at low Rabbit density however, since a density‐dependent relationship has not been demonstrated throughout the range of Rabbit densities that occur. This requires experimental demonstration to determine the threshold pressure below which predation becomes limiting. If so, reductions in Rabbit populations by short‐term control operations could allow natural predation to help maintain low Rabbit densities for several years in some habitats. Conversely, the implications for Rabbit populations and thus crop damage resulting from predator control (e.g. in game management regimes) should be appreciated.

Ecological Genetics of the Wild Rabbit in Australia. II. Protein Variation in British, French and Australian Rabbits and the Geographical Distribution of the Variation in Australia

A survey for genetic variation was carried out using 21 proteins controlled by 26 loci in rabbits from Britain, Mediterranean France and Australia. Five enzymes, adenosine deaminase, phosphogluconate dehydrogenase, carboxylesterase, carbonate dehydratase and dihydrolipoamide reductase (NAD+) were found to be polymorphic. The average heterozygosity in wild rabbits was 6%. The genetic distances separating the various populations indicated that three different stocks were present in these populations. The rabbits from Britain and mainland Australia belonged to one group, those from France to a second group and the rabbits from southern Tasmania were a distinctive third group. Highly significant differences in gene frequency were found between the various local populations studied from mainland Australia. This variation showed no clear pattern and was attributed to genetic drift due to small effective population sizes. Bottlenecks in population size occur regularly in local rabbit populations in Australia through, for example, drought, myxomatosis outbreaks or rabbit control programs.

Suppression of Antibody Synthesis

Abstract Antigenic competition between two specific haptens was demonstrated at the cellular level in local rabbit lymph nodes. Competition was shown to exist whether the hapten was linked to the same or to different carriers. Competition existing at certain critical doses of immunogen indicated that the phenomenon is not a true competition for a cell type or for some aspect of the antigen-processing system. The test antigen and the competing antigen were injected simultaneously into opposite side footpads of the rabbits and suppression was demonstrated in local lymph node cell responses. The data indicate that a circulating inhibitor was elaborated during the immune response.

Histomorphological comparative study of the pregnant and lactating mammary gland in endogenous rabbits(Oryctolagus Cuniculus)

Background:comparative study of the pregnant and lactating mammary gland in local rabbits . 
 Objective :histological describtion of mammary gland of two period (pregnant and lactating mammary gland ). 
 Mterials and methods :To determine the differences that could take place in the mammary gland between two periods of the life (pregnant and lactating) of endogenous rabbits(Oryctolagus Cuniculus). 
 Results: Grossly the mammary glands shown in rabbits (pregnant and lactating) were four or five pairs, located at the ventral surface of the thorax, abdomen, and inguinal. The mammary gland of the doe has 8or 10 nipples. Histological results of pregnant group females contained the same histological components but there were alveoli intralobular connective tissue interlobular connective tissue, glandular duct, and adipose tissue, the alveoli lining with cuboidal cell, the ducts lining with a double layer of the cuboidal cell around by collagen fibers and fatty vacuoles the results of this study revealed that the pregnancy period showed the most development, especially in the glandular units (alveoli) because of the effect of estrogen and progesterone hormones rule in the growth of duct and alveoli and stope immediately after parturition after a drop of the placenta also secretion colostrum detection. In lactating group rabbits, the lobules were large collecting ducts lined by multiple layers of the columnar and cuboidal cells and mammary gland lobule. A magnified section of glandular alveoli showed it lined with low cuboidal secretory cells and their lumen contained secretory product and glandular alveoli lined with low cuboidal secretory units and their lumen contained secretory product. the alveoli had large lumens and were lined with cuboidal epithelium and flattened nuclei of myoepithelial cells and flattened nuclei of myoepithelial cells, the lobules have the most alveoli were large. The interlobular connective tissue that surrounded the large lobules with blood vessels and wide trabeculae of dense irregular connective tissue with adipose tissue, the lobules of a different size, and interlobular duct filled with the secretion of the trabeculae of dense irregular connective tissue the interlobular Connective tissue and adipose tissue, the lobules in a different size. The interlobular duct with secretion, intralobular duct, most alveoli were large and without secretion may be at the end of the lactation period.

潜在性脳局所アナフィラシキー家兎脳の水分代謝に関する研究

潜在性脳局所アナフィラシキー家兎脳の水分代謝に関する研究

慢性脳局所アナフィラキシー家兎脳髄の解糖作用ならびに組織呼吸に関する研究

慢性脳局所アナフィラキシー家兎脳髄の解糖作用ならびに組織呼吸に関する研究

慢性脳局所アナフィラキシー家兎脳髄の解糖作用ならびに組織呼吸に関する研究

慢性脳局所アナフィラキシー家兎脳髄の解糖作用ならびに組織呼吸に関する研究

慢性脳局所アナフィラキシー家兎脳髄のヒョリンエステラーゼ活性値,遊離アミノ窒素及び神経細胞内ケトエノール顆粒に関する研究

慢性脳局所アナフィラキシー家兎脳髄のヒョリンエステラーゼ活性値,遊離アミノ窒素及び神経細胞内ケトエノール顆粒に関する研究

慢性脳局所アナフィラキシー家兎脳髓のヒョリンエステラーゼ活性値,遊離アミノ窒素及び神経細胞内ケトエノール顆粒に関する研究

慢性脳局所アナフィラキシー家兎脳髓のヒョリンエステラーゼ活性値,遊離アミノ窒素及び神経細胞内ケトエノール顆粒に関する研究

慢性脳局所アナフィラキシー家兎脳髄のヒョリンエステラーゼ活性値,遊離アミノ窒素及び神経細胞内ケトエノール顆粒に関する研究

慢性脳局所アナフィラキシー家兎脳髄のヒョリンエステラーゼ活性値,遊離アミノ窒素及び神経細胞内ケトエノール顆粒に関する研究

THE BEHAVIOUR OF CHOLESTEROL AND LECITHIN TOWARDS NORMAL HÆMOLYTIC SERUM

1. Cholesterol is able to inhibit the hæmolytic action of normal serum from a large number of mammalian species towards a variety of mammalian red blood cells. The only exception was found in the sera of some rabbits.2. The sera of most of the local rabbits does not exhibit lytic property against dog cells; only that of a few, especially of the black variety, possesses this lytic action. The lytic activity of the sera of some of these rabbits is inhibited by cholesterol, but that of others is not.3. This inhibitory action of cholesterol towards normal hæmolytic serum is due to the inactivation of the complement. Similar behaviour has also been observed with lecithin. Unlike cholesterol, lecithin is able to reinforce amboceptor activity, but this occurs only in the absence of complement.4. The inactivation of complement by cholesterol and by lecithin are both reversible; i. e. when the complement is destroyed by heat, the anti‐hæmolytic potency of cholesterol and of lecithin is recovered quantitatively.