El-Sherbiny, A.M.; Amin, S.O.; Hernández, C.; Carrearu, S.
[EN] In the immature rabbit testis (78 days), after a
collagenase treatment (0.05 %), 20 min at 32ºC in Ham
F12/DME medium and centrifugation of the crude testicular
cell preparation obtained on a d1scontinuous Percoll gradient,
we demonstrated the presence of two enriched Leydig cell
populations (CLI : 47 % and CLll : 76 %) which viabihty is
higher than 95 %. In basal conditions (Ham F12/DME
medium, 5h at 32ºC), Leydig cells of CLI synthesize 3 fold
more testosterone than Leydig cells of CLll (32 ± 4 and 9.5 ± 0.1 ng/1 os Leydig cells) ; in addition the cells of CLI are
twice as much sensit1ve to...
Berchiche, M.; Lebas, F.
[EN] Five groups of twenty rabbits received from 5 to 11 weeks of
age, 0ne of 5 diets based on horse bean (Ascott variety,
36 %) supplemented or not with pure dl-meth1onine in order
to obtain the following final levels of sulphur amino acids
(SAA) : 0.37 % - 0.47 % - 0.57 % - 0.62 % or 0.67 %. On
average the diet's protein content was 16.9% as fed, and the
crude fiber level 12.1 %. Nutrients digestibility was measured
with the 0.62 % SAA diet: nitrogen 70.3 %, crude fiber
18.3 %, energy 68,7 %. The digestible energy content was
2670 kcal/kg as fed. The lowest level...
Chiericato, G.M.; Ravarotto, Licia; Rizzi, Chiara
[EN] The tria! was conducted on 75 male rabbits (50
days old) of a commercial cross bred type in order to study
the effects of temperature on the metabolic profile of rabbits.
The animals were housed in two different rooms at 12ºC (L T)
and 30ºC (HT). Relative humidity was about 65 % and the
natural photoperiod was characterized by 16L:8D. At the end
of the expenment (106 days of age) a blood sample was
taken from each rabbit after 2 hours' fasting. The L T animals
showed higher (P<0.01) daily weight gain (36.7 vs 25.7 g),
feed intake +173 vs 11 O g) and feed convers1on ratio (...
Ben Rayana, A.; Bergaoui, R.; Ben Hamouda, M.; Kayouli, C.
[EN] Two trials have been done to test the incorporation of olive oil
cake in diets of growing rabbits. The first trial has been
realized on 48 rabbits of both sexes. Measurements of diets
digestibility have been done at the age of 12 weeks. No
significant differences were observecf for organic matter
digestibility (70.6 to 73.8 %). The average daiíy gain (g/d), between 5 and 11 weeks was 34, 1 vs 35,5 and 33,6 for,
respectively, the diets T (O% olive cake) ; G1 (11,5 % olive
cake) and G2 (23,0 % ohve cake). The feed etficiency was
respectively 3.43, 3.38 and 3.47. On the second tria!, done
Pla, M.; Fernández-Carmona, J.; Blas Ferrer, Enrique; Cervera Fras, Mª Concepción
[EN] Forty-two medium sized crossbred rabbits,
born and kept ata constant temperature (30ºC), were divided
into two groups. The first group remained under the same
conditions, while the second group was allocated at weaning
to a conventional building with an average minimum
temperature of 20ºC. The rabbits were weighed at 70, 100,
150, 200, 250 and 280 days, at which point they were slaughtered. The growth of the animals reared under the
higher temperature was lower throughout the observation
period. Their carcasses were lighter and thinner than the
carcasses of the control group. The differences between
other carcass traits were due to differences in liveweight or
Blas Ferrer, Enrique; Cervera Fras, Mª Concepción; Fernández Carmona, Julio
[EN] 1200 weaned crossbred rabbits, individually
controlled, were fed ad libitum on Diet A (16.4 % starch, 15.3
% CF) or Diet B (24.B % starch, 11.6 % CF) from 28 to 49
days of age. Uve weight gain was not affected by diet (37.7
g/day). Feed intake and leed conversion were higher with
Diet A (95.5 vs 84.5 g/day and 2.55 vs 2.27 g/g, P<0.001).
Mortality was however lower with this diet (4.7 vs B.O %,
P<0.05). Another group of 60 rabbits was slaughtered at 38 or 49 days of age, the starch content of their digesta at the
distal ileum and caecum was determinad. Starcfí content...
[EN] Thirty weaner rabbits were randomly allocated
to three diets : a laboratory formulated diet based on
extruded soybean meal, groundnut haulms, maize and ricemilling
by-products, and designated compound diet, a
commerc1al rabbit pelleted diet and a commercial poultry
grower's mash. Feed and water were supplied ad /ibitum. The
compound diet elicited significantly (P<0.05) higher weight
gains (15.2 g/d vs 13.4 or 6.3 g/d), feed consumption, feed conversion efficiency and total edible viscera weight
compared to the commercial preparations. The dietary effect
on the dressing percentage and relative organ anó tissue
weights was non significant (P>0.05). These results showed
that cost-effective rabbit diet coufd be formulated from
extruded soybean meal, groundnut haulms,...