Mohamed A. Kosba

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The performance features of one paternal (PL) and one maternal line (ML) each, their reciprocal crosses and their crosses with a non-selected Fayoumi population are presented. A clear heterosis was found for hatchability only. Shank length, body weight, fertility, sexual maturity and egg weight were intermediate. Heterosis was observed for the number of(More)
Raising ducks on fish ponds (fish-duck culture) on a commercial scale is a new practice in Egypt, therefore, a study was undertaken to evaluate this practice from production, carcass composition and economic viewpoints. Five earthern ponds were used in the non-integrated system (no ducks) whereas four earthen ponds, in which each pond was supplied with 125(More)
Two Alexandria lines selected for high (HL) and low (LL) body weight and one unselected Fayoumi line were compared for the duration of fertility in both sexes. In the parents, LL had a significantly higher duration of fertility than HL and Fayoumi. In the female progeny, the mean duration of fertility in HL, LL, and Fayoumi were 9.76, 11.20, and 10.66 days,(More)
AIM This research was conducted to determine the most affecting parameters on hatchability of indigenous and improved local chickens' eggs. MATERIALS AND METHODS Five parameters were studied (fertility, early and late embryonic mortalities, shape index, egg weight, and egg weight loss) on four strains, namely Fayoumi, Alexandria, Matrouh, and Montazah.(More)
A. CIERESZKO and K. DABROWSKI / Effect of ascorbic acid supplement in vitro on rainbow trout sperm viability 1–8 J. SHAIK MOHAMED, B. RAVISANKAR and A. IBRAHIM / Quantifying the dietary biotin requirement of the catfish, Clarias batrachus 9–18 W.-K. NG, K.-S. LU, R. HASHIM and A. ALI / Effects of feeding rate on growth, feed utilization and body composition(More)
Four lines of Alexandria strain were used; selected egg line (EL), selected meat line (ML) and their controls (CEL&CML). The present study was performed for propose of increasing uniformity in Alexandria chickens. Eight weeks body weight and also age of sexual maturity were estimated in all populations. In the meat line selection was done for increasing(More)
Crosses and backcrosses were carried out with two commercial varieties of turkeys (Black Bronze and White Ross). The birds of the White Ross strain had higher body weights at 12 and 16 weeks of age than the Black Bronze turkeys. The F 1 crosses were intermediate between the body weights of the parent varieties. For the 12-week body weight, heritability(More)
Two Alexandria lines selected for a high (HL) or low (LL) eight-week body weight, and an unselected Fayoumi line were used to study the duration of fertility, fertility percentage, fertility percentage duration, age at sexual maturity, egg number in the first ninety days of laying, egg weight, eight-week body weight, and body weight at sexual maturity. The(More)
The livestock sector forms an essential component of the agricultural output in both the developed and developing world. Of the animal species used, poultry considerably contribute to the total food and agricultural production. However, with increasing loss of genetic diversity that has been observed for all agriculturally used species, poultry genetic(More)
The present study was carried out at the Poultry Research Center, Faculty of Agriculture, Alexandria University, during three seasons to study the effect of crossing and reciprocal crossing between two lines of Alexandria chickens (Egg line EL and Meat line ML) on growth traits. The results are summarized as follows:1. The overall means for body weight at(More)