Kasa, I.W.; Thwaites, C.J.
[EN] An experiment was conducted on the effect of
infra-red (i.r.) radiation on female NZ>/11 rabbits. A 4x3x6
factorial design was employed in which the factors were : 4
intensities of i.r. radiant heating of O.O, 1.9, 2.1, 2.4 MJ/m2/h ;
3 replicates and 6 rabbits. All animals were watered and fed
a standard ration ad libitum. Rectal temperaturas differed
(P<0.001) between treatments and were highest at the "high"
level of i.r. radiation (1 ºC higher than far controls). At the
"medium" and "low" levels of i.r. heating RT's were
respectively 0.3º and 0.2ºC higher than in controls. In
different i.r. treatments skin temperatura (ST) was
significantly different (P<0.001), being highest...
Parigi-Bini, R.; Xiccatto, G.
[EN] The rabbit doe, at the beginning of its reproductiva activity
(first pregnancy first lactation or first" concurrent pregnancy
and lactation), hás a negativa energy and material balance.
The net body composition at the first parturition changes
definitely during lactation, with an important loss of lipids
(about - 40 %) and energy (- 20 %). lf the rabbit doe is
concurrently pregnant, the energy deficit becomes greater
and the nitrogen and mineral balances become negativa as
well. Consequently the second kindling litter size is lower,
(- 10 % of total youngs born and - 20 % of rabbits born
alive). Moreover, the composition of new born pups shows a
LOPEZ, Marina; FORCADA, F.; RODRIGUEZ, J.A.; MARTIN, Maria; ZARAGAZA, L.
[EN] Ovulation rate and number of 72h post-mating
recovered embryos were studied in nulliparous Spanish Giant
does treated with an intravenous injection of 25 IU hCG
(n=22) or 20 μg GnRH (n=20) intramuscularly after coitus.
Embryos were recovered under anaesthesia by separata
perfusion of the oviducts and uteri. One of the GnRH-treated
does did not ovulate. No significant differences between
groups were found either in the ovulation rate or in the
number on recovered embryos per donor doe (8.5 ± 0.2 and
7.3 ± 0.2 vs 8.6 ± 0.4 and 6.8 ± 0.9 respectively for hCG and
GnRH treated animals). After transfer into the uteri of
synchronized Solaf commercial hybrid recipients,...
[EN] An experiment was carried out to determine the
genetic variation in litter traits and reproductiva intervals
between different parities in New Zealand White (NZW) and
Californian (CAL) rabbits. Data on 581 litters produced by
163 does mated to 43 bucks of NZW and CAL rabbits were
involved. A linear mixed model included the effects of service
buck and does within service buck (as random effects) and
year-season and parity (as fixed effects) was used for
analysing such data. NZW breed had higher litter size, weight
and gain along with a lower number of stillbirths and
preweaning litter mortality relativa to CAL breed.
Reproductiva intervals and number of services per
Abd El-Baki, S.M.; Nowar, M.S.; Bassuny, S.M.; Hassona, E.; Soliman, E.S.
[EN] Forty New Zealand White rabbits (20 males and 20 females)
aged 5 weeks, of 735g in average weight, were divided into
two groups on basis of weight and sex. A pelleted complete
rabbit feed containing 45 % cassava products (CCF diet) as
30 % root meal + 15 % leaf meal, was formulated to be fed in
comparison with a commercial feed (AF diet ; Atmida Cº)
during the 15 weeks of experiment, divided in 3 stages of 5
weeks. 1 % urea was added to the CCF diet in arder to
increase the N-content. The results indicated that CP
digestibility and N-balance of CCF were significantly