El-Sheikh T.M.

COMPARATIVE STUDIES ON SOME PRODUCTIVE CAPABILITIES AMONG IMPORTED, ENDOGENOUS AND NATIVE RABBIT BREEDS UNDER EGYPTIAN ENVIRONMENTAL CONDITIONS

El-Sheikh T.M., Ghaly M. Mona, T.S.T., Selem

Abstract
This study was planned to evaluate some productive capabilities of growing different breeds of rabbits; New Zealand White (NZW), V-line; Baladi Black (BB) and Gabali breeds under Egyptian conditions. Four hundred weaned rabbits (one month age) of both sexes were used as biological material. Breed had significant effects on growing traits. The (NZW) rabbits showed the highest (P≤0.05) initial and body weight at 60 days. Also V-line and (BB) groups showed significantly higher daily weight gain than both Gabali and NZW rabbits. For daily feed intake trait, NZW and V-line breeds showed higher significantly (P≤0.05) than both BB and Gabali breeds. Whereas, (BB) rabbits showed the highest (P≤0.05) feed efficiency trait (0.375). Dressing percentage and all internal organs weight were significantly affected by breeds. A significant difference between breeds for carcass weight, V-Line scored the highest (1168.2 g). For dressing percentage, V-Line observed the highest records (62.71 %), meanwhile the other breeds observed the same manner. Significant maximum values (P≤0.05) were recorded for all internal organs weight of growing V-Line rabbits. Baladi Black, (NZW) and Gabali breeds were significantly descendedly ranked after that. Blood picture and serum constitute observed that (BB) and Gabali had significantly (P≤0.05) higher values than both imported NZW and V-line except total protein and globulin traits, where the native Gabali rabbits recorded a significant maximum score at all (7.01 and 2.4 mg%), respectively.

Key words: Breed, Rabbits, Growth, Blood constitute


STUDII COMPARATIVE ASUPRA UNOR ÎNSUŞIRI PRODUCTIVE LA UNELE RASE IMPORTATE ŞI AUTOHTONE DE IEPURE, ÎN CONDIŢIILE SPECIFICE MEDIULUI EGIPTEAN

El-Sheikh T.M., Ghaly M. Mona, T.S.T., Selem

Rezumat
Prin acest studiu s-a urmarit evaluarea unor īnsusiri productive pe parcursul cresterii a diferite rase de iepuri: Alb Neo-Zeelandez (NZW), Linia V; Baladi negru (BB) si Gabali, īn conditii specifice Egiptului. Patru sute de iepuri īntarcati (vārsta de o luna) de ambele sexe au fost utilizati ca material biologic. Iepurii NZW au prezentat cea mai buna greutate corporala initiala, respectiv la 60 zile (P≤0.05). Exemplarele din grupurile Linia V si BB au realizat sporuri medii zilnice semnificativ superioare fata de iepurii din loturile Gabali si NZW. Īn cazul consumului zilnic de hrana, rasa NZW si linia V au avut cele mai bune rezultate, foarte semnificative statistic (P≤0.05), comparativ cu grupurile BB si Gabali. Īn acelasi timp, iepurii BB au prezentat cea mai buna valoare pentru conversia hranei (P≤0.05) (0.375). Randamentul la sacrificare si greutatea organelor interne au fost influentate semnificativ de variabila rasa. Au aparut diferente semnificative īntre rase pentru greutatea carcasei iar Linia V a prezentat cea mai buna valoare (1168,2 g). Acelasi genotip a īnregistrat cel mai mare randament la sacrificare (62.71%), celelalte rase manifestānd aceeasi dinamica pentru caracterul analizat. Valori maxime, semnificative (P≤0.05) pentru greutatea organelor interne s-au īnregistrat īn cazul Liniei V, urmānd, īn sens descrescator semnificativ, rasele Baladi Black, NZW si Gabali. Investigatiile de serologie sanguina au aratat ca rasele BB si Gabali au prezentat valori semnificativ mai mari (P≤0.05) fata de genotipurile importate NZW si Linia V, pentru majoritatea parametrilor, cu exceptia proteinelor si globulinelor serice, pentru care rasa indigena Gabali a avut cele mai bune rezultate, semnificative (7.01 si 2.4 mg%).

Cuvinte cheie: rasa, iepuri, cresteri, constituenti sanguini