Agricultural and Marine Sciences, 15: 21-27 (2010) 2010 Sultan Qaboos University Carcass characteristics of the Libyan purebred Mahali goat and their crosses with Damascus and Morcia Granada Goats. Ahtash A.E., Biala A.s., Magid M.F. and Marhoun H.M. This study was conducted to evaluate the Carcass characteristics of Mahali (M), Damascus (D) and Morcia Granada goats and their crosses. Live weght, carcass weight, dressing-out %, rib eye muscle area, non-carcass component and kidney fat were measured. The results showed significant superiority of Damascus goats in live weight (65.8 kg), carcass weight (34.3 kg), dressing-out % (52.1 %), rib eye muscle areas (22.7 cm2) over the Mahali and Morcia Granada goats. The crossbred group ( ½ M x ½ D) was superior in live weight (50 kg), carcass weight (24.2 kg), dressing-out % (48.4%) and rib eye muscle area (21.2 cm2) over other crossbreds. The crossbred group (¾ D x ¼ M) was superior in live weight (61.7 kg) carcass weight (31 kg) and rib eye muscle area (21.3 cm2) over the other ¾ crossbreds. This study indicated that crossing between Mahali x Damascus breed was beneficial for increasing live weight and meat production. Key words: Breeds, crossbreeding, carcass.
Abdelkareem E. Ahtash, Abdulla S. Biala , Aiad F. Magid , Hamed M. Marhoun(5-2010)

أجريت هذه الدراسة بهدف دراسة تأثير مستويات مختلفة من النترات في مياه الشرب على خمسة وأربعين أنثى أرنب هجين ( نيوزيلندي وكاليفورنيا ) في عمر الفطام (4 أسابيع) وكانت تتراوح أوزانهم ما بين(900 1200 غرام) وقسمت الأرانب عشوائياً إلى خمسة معاملات حيث تحتوي كل معاملة على تسعة أرانب ، وأعطيت المعاملات تراكيز النترات بماء الشرب على النحو التالي (9.0 64 78.2 144 200ملغرام/ لتر) وقد ثم وزن الجسم ،و تقدير محتويات الدم من أنزيمات الكبد واليوريا والكرياتنين وهرمونات الغدة الدرقية ،التحليل الإحصائي أوضحت نتائج هذه الدراسة أن للنترات تأثيراً سلبي على صحة الأرانب فقد سبب شرب الماء زيادة وزنية قليلة في أوزان أجسام الأرانب حتى نهاية التجربة ، ألا أن هناك انخفاضا ملحوظاً في أوزان أرانب المعاملة بتراكيز ( 144 200ملغرام / لتر) يصل إلى 51.6 % مقارنة بمعاملة الشاهد كان هناك انخفاض في الغذاء المأكول وكمية شرب الماء . ووجد أن هناك ارتفاع في إنزيم الالنين أمينو ترانس فريز ( ALT) في أرانب المعا ملة بتركيز200) ملغرام / لتر) إلى (74.4وحدة دولية / لتر) وكذلك ارتفاع أنزيم الفوسفاتيزالقاعدي (ALP) في نفس المعاملة (747 وحدة دولية / لتر) كانت العلاقة طردية بين تركيز النترات في مياه الشرب والكرياتنين واليوريا في مصل الدم في جميع المعاملات التجريبية حيث ارتفعت اليوريا في المعاملتين 144) 200ملغرام / لتر) إلى(86.4 ملغرام / 100 مل) بينما الكرياتنين إلى (3.1 ملغرام / 100 مل ) وكذلك انخفاض هرمون ثايرونين ثلاثي اليود (T3) في المعاملة (144 ملغرام / لتر) إلى 0.86) نانوغرام / مل) والمعاملة 200 ) ملغرام/لتر) إلى 0.83)نانوغرام / مل) بينما كان هرمون الثايروكسين ((T4 في المعاملة 200)ملغرام /لتر) أكثر انخفاضاً(23.49 نانوغرام/ مل) مقارنة بالشاهد وقد شوهدت على الأرانب المتأثرة التشنجات العصبية والكسل والخمول. Abstract This experiment was carried out on forty five females of hybrid rabbits at age of 4 weeks with an average weight of 900-1200 g. The animals were divided randomly into five groups with 9 animals each. The animals were given nitrate concentrations in drinking water as follows 9, 64, 78.2,144 and 200 mg/l for about 15 week Then their body weights, liver enzymes,and plasma concentrations of urea creatinine and thyroid hormones were measured. The results of this study indicated that drinking water polluted with nitrate has a negative effect on rabbit's health, where drinking polluted water caused low body gains in rabbit's until the end of the experiment partialdy receiving two treatments of 144 and 200 mg/l. of nitrate in drinking water 50.6% in comparison with the control group such decrease was and water intake. Alanin amion transferase (ALT) was increased in 200mg/l. treatment to 74.4 IU/l, with concomitant increase in Alkaline Phosphatase (ALP) in 200 mg/l. treatment to 747 IU/l. There was positive relationship between nitrate concentration in drinking water serum concentrations, creatinine and urea, where urea increased in 144 and 200 mg/l. treatments to 86.4 mg/dl, while creatinine to 3.1 mg/dl. Triiodothyronine (T3) was reduced in 144 and 200mg/l treatments (0.86 and 0.83 ng/ml, respectively), alos thyroxin hormone decreased in animals receiving in 200mg/l treatment to 23.49 ng/ml in comparison with the control 9mg/l. Neurospasms, lethargy and inactivity were observed on the affected rabbits.
سمية الزرقاني أبوبكر الزرقاني (2010)

Egyptian Journal of sheep & Goat Sciences Vol. 10, (1) P: 13-18 – 2015 Small ruminant contribution in meat production in Libya Abdulkarim Ahtash Abstract: Sheep and Goat are considered the important agriculture activity overall grazing areas in Libya, since natural range represent the important parts of feed and forages for those animals. Barbary sheep and local goats breeds proved their potentiality through ability to withstand the adverse conditions such as drought, sub- maintenance feeding, heat stress, disease and poor management. Libyan Barbary sheep represents the dominant Libyan sheep breed (95%) in which their population is 6.5 million heads raised for meat and wool production. Local goats (Mahali) represents more than 90% of the number of goats in Libya (1.5 – 2.0 million). Sheep and goat flocks were spread overall the country specially the coast. Extensive production system was the main system used at semi-arid grazing area and mountain. Statistics showed that sheep and goat contribution of meat production during 1998-2009 ranged from 67 – 80.5%. It looks that Libya does not reach self-sufficient of meat production from small ruminants though the wide spread of these animals. It has recognized that production deficiency percentages from sheep and goats’ meat ranged from 49% to 55% during the same period. Key words: small ruminant, meat production, self-sufficient. arabic 7 English 48
Abdulkarim Ahtash(4-2015)