Effect of remating interval on the performance of rabbit production and reproduction

Transcription

1 Effect of rematg terval on performance of rabbit production reproduction Yamani K.A.O., Daader A.H., Askar A.A. Rouvier R. (ed.), Baselga M. (ed.). Rabbit production genetics Mediterranean area Zaragoza : CIHEAM Options Méditerranéennes : Série A. Sémaires Méditerranéens; n pages Article available on le / Article disponible en ligne à l adresse : To cite this article / Pour citer cet article Yamani K.A.O., Daader A.H., Askar A.A. Effect of rematg terval on performance of rabbit production reproduction. In : Rouvier R. (ed.), Baselga M. (ed.). Rabbit production genetics Mediterranean area. Zaragoza : CIHEAM, p (Options Méditerranéennes : Série A. Sémaires Méditerranéens; n. 17)

2 CIHEAM Options Mediterraneennes Effect of rematg terval on performance of rabbit production reproduction K.A. YAMANI A.H. DAADER A. ASKAR & OF O study was out on 30 does of NZW mated 1, 5 10 days to exame effect of on showed a significant effect (P 0.05) on conception milk week daily ga 2225 days a highly significant effect (P < 0.01) on milk yield week of age only. does mated 5 days slightly at (7.8) weang (5.6), milk yield ( g total yield 25 days) weight ( g at weang) than does mated 1 10 days. does mated 5 days showed slightly (2.8%), (19.2%) mean bunny weight (379.6 g at weang) two does mated 10 days highest of conception (89.9%). words: de l tervalle mise bassaillie sur les perfornzances des lapes en production et reproduction. Une étude a été menée sur 30 lapes de race distribuées en 3 groupes et saillies 5 ou 10 jours après la mise bas, af d étudier les effets des tervalles mise bassaillie sur certas caractères de production et reproduction. L tervalle mise bassaillie a eu effet significatif 0,05) sur le taux de conception, l iudice de transformation laitière pendant la première semae et le de portée pendant la période 22ènze25ènae jours ; un effet très significatif < 0,Ol) sur la production de lait uniquement pour la troisième semae d &e. général, les lapes saillies 5 jours postpartum ont nlontré des tailles de portée légèrement supérieures ri la naissance (7,s) ou au sevrage (5,6), 1111 rendement laitier plus important (3313,8 g de production totale en 25 jours) et un poids de la portée plus élevé (2052,2 g au sevrage) que les lapes saillies ri l ou 10 jours. Les lapes saillies 5 jours postpartun1 ont montré un peu mos de mortatalité (2,S%), de mortalité présevrage (19,2%), et un poids moyen des lapereaux u11 peu plus faible (379,6 g au sevrage) que les deux autres groupes expérimentaux. contre, les lapes saillies 10 jours après la mise bas ont présenté le taux de conception le plus élevé (S9,9%). : Lap, reproduction, production, tervalle mise bassaillie. Introduction One of management of is selection of suitable time of especially tensive system. kdlg to is may output of weaned with identify et al, 1984). suitable time of tensive scanty. was out to exame effect of tensive (l day semitensive conditions (5 10 days Material methods to Lebas et al. (1986) on of This was on foundation stock of New Faculty of Zagazig Egypt. does used agg 5 months of 3.5 kg mean body weight. animals to body weight n allocated evenly to be 1,5,10 days cycle cages of a Options no :

3 CIHEAM Options Mediterraneennes ( cm) with ( cm). cages stabilized to a conventional unheated wdowed buildg. buildg was but with sided fans. animals lighted 1416 day animals conditions. on a pelleted diet which contaed 16.3% 2.5% 14.0% was also composed of vitams to feedg was doe was without a cludg gestation. animals 180 to 240 g daily of diet to late (day 24 diet was adlibitum. all time. clean by a nipple All with NZW bucks of doe was to buck s pen at time of matg was if doe to accept buck twice possible. nestbox. dead weighed at matg at kdlg weight weekly was young twenty five days all yield does all Estimation of this young weang. youngs of sucklg 24 h by weighed to sucklg. sucklg was completed youngs weighed aga. weight was dicated as well as milk yield. Statistical analysis was to (1982). Results discussion of effects of on conception at weang (LSW), Table 1. could be of does which days showed highest of conception, while 5 days gave conception significant. by (1983) et al. (1986). of was found to be unaffected by matg system, slight noticed. showed that was 7.0, which mated 10 days significant. Also, significant effects on by et al. (1984) (1988). On (1983) significant effect of on at weang was found to be significant. which days slight at weang; this might be to highest lowest this of does to what was with fdgs, studies et al., 1986) conclusion of of Table 1 showed that significantly affected by that 5 days 1 days with those obtaed by (1976). effects of on milk yield, Table 2, it was noticed that does mated 5 days milk yield than does mated l 10 days This was noticed whole (025 days) except days (2225) milk yield was 10 days Statistical analysis of data showed that milk yield amongst significant except at highly significant. elevated milk yield 5 days could be low kdlg associated with low conception this of does. at only was significant < O.OS), days with to that of does mated 5 days effects of on milk yield milk was scanty except that of et al. (1988) who 42 days milk yield than does mated 33 days 174

4 CIHEAM Options Mediterraneennes Table 1. <), stard errors () coefficients of variability (C. V.) of conception rate %, gestation period, litter at litter at weang, stilbirths % preweang mortality % affected by rematg terval. Conception % at weang I % % Table 2. (), stard errors (S. E) coefficients of variability (C. V.) of weekly total milk yield per doe milk conversion as affected by rematg terval. Yield (gm). 1st week 2nd week week 2225 days 025 days 1st week 2nd week I No. of (58) c. v S.E. 0.2 C.V No, of T (58) b "b (55) (55) " " (61) (61) " b mean values same did not significantly each 175

5 CIHEAM Options Mediterraneennes of effects on weight, daily ga mean bunny weight 3. could be noticed that does mated S days kdlg weight than those mated 1 10 days kdlg, but statistically significant except at weang (25 days of age). This may be due to good health efficiency which low of kdlg does mated 5 days significant effect of was confed only to daily weight ga 2225 days of of S days could be noticed this to fdgs by Niedzwiadek (1975). At same time, et al. (1986) weight at 21 days of age g does mated immediately kdlg g study. Values of mean body weight does mated 1 10 days all stages of sucklg than that of 5 days not statistically significant. with Niedzwiadek (1975) who weight 1020 days kdlg was those mated 47 days kdlg. conclusion, discussed effect of on of may show that most a small but of does mated 10 days showed highest of conception. could be concluded that does may be 10 days be out on this subject to above References Cited J. S. (1975): of n" 21, of United J. Studieson of pp of S. of an tensive a 2 ASFC (1976), 6 pp. Cited 46:455. J. (1986): effects of on of J. Animal Science, 62(6), G.G., W. (1984): effects of on of to 2s. on kdlgswith a of 4th of pp

6 CIHEAM Options Mediterraneennes Tabla (3) starderrors (S.E.) coefficients of variability (C.V.) of effect of rematg terval on litter weight, litter daily ga mean bunny weight. weight (gm). 7 days 14 days 21 days 025 days daily ga (gm).. 1st week 2nd week week 2225 days 025 days At (gm). 7 days 14 days 21 days 025 days No. of T (58) b b (55) "' "' , Yb mean values same ) 177 significantly