World Rabbit Science - Vol. 01 (2)-1993
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- INFLUENCE OF TWO ISO-ENERGETIC DIETS (STARCH vs FAT) ON EXPERIMENTAL COLIBACILLOSIS (EPEC) AND IOTA-ENTEROTOXAEMIA IN EARLY WEANED RABBITS.
- NUTRITIONAL EFFECT OF MULBERRY ("MORUS ALBA") LEAVES AS SOLE RATION OF ADULT RABBITS.
- RELATIONSHIP BETWEEN SOME BLOOD PARAMETERS, WOOL YIELD AND BODY MEASUREMENTS IN THE YOUNG ANGORA RABBITS.
- EFFECT OF DIETARY FIBRE AND FAT CONTENT ON THE REPRODUCTIVE PERFORMANCE OF RABBIT DOES BRED AT TWO REMATING TIMES DURING TWO SEASONS
- REPRODUCTIVE RESPONSE OF PREPUBERTAL FEMALE RABBIT TO PHOTOPERIOD AND/OR MALE PRESENCE
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- PublicationREPRODUCTIVE RESPONSE OF PREPUBERTAL FEMALE RABBIT TO PHOTOPERIOD AND/OR MALE PRESENCE(World Rabbit Science. ICTA. UPV, 1993) Berepubo, N.A.; Nodu, M.B.; Monsi, A.; Amadi, E.N.[EN] A study was undertaken to determine, in tropical breeding conditions, the effect of mate presence and/or photoperiod on age at puberty attainment, oestrous behaviour and breeding performance in prepubertal female rabbits. The study involved 3 treatment groups of seven does each, designated as A, B and C. Group A, rabbits were exposed to both extended light (+ 6 hours) and male presence. Group B, does were subjected to extended light only, whereas those in group C were treated to male presence only. Group D rabbits which were not subjected to any of the two treatment factors (photoperiod and male presence) servad as the control group. The data obtained indicated that the does subjected to either one or both treatment factors attained puberty earlier (142.4 ± 2.0 days) than the control group (167.1 ± 5.0 days). Weight at puberty was also significantly (P<0.05) lighter (1.34 ± 0.04 kg) in the does exposed to male presence and/or photoperiod than the control group (1.50 ± 0.06 kg). Oestrous behaviour in terms of mean frequency and "intensity" of oestrus as well as length of the cycle were significantly (P<0.05) improved in the treatment groups than the control. The duration of oestrus (heat) was however shorter among the treatment groups. With respect to breeding performance, kindling rate was much higher among the treatment does (66.03 ± 2.8 %) than the control (50.00 ± 3.1 %). However, differences in gestation length, litter size and litter weight were not statistically significant (P>0.05). Pseudopregnancy in proportion of non fertile matings was significantly (P<0.05) higher among the treatment groups ( 50. 1 ± 2.3 % ) than the control ( 33.33 ± 3.5 % ). lt was concluded that the exposure of young female rabbits to male presence and/or photoperiod may serve as a useful and relatively inexpensive management tool in improving rabbit production in the tropics since the technique has the potential to induce early puberty, amplify behaviour eostrus and improve kindling ratas.
- PublicationRELATIONSHIP BETWEEN SOME BLOOD PARAMETERS, WOOL YIELD AND BODY MEASUREMENTS IN THE YOUNG ANGORA RABBITS(World Rabbit Science. ICTA. UPV, 1993) Wang, K.; Zheng, W.[EN] This paper deals with the relationship among wool production, growth and development, hemoglobin (Hb) content and the activities of serum alkaline phosphatase (ALP), acid phosphatase (ACP), glutamic-pyruvic transaminase (GPT) and 5'-nucleotidase (5'-NT) in angora rabbit. The experiment was conducted in the University Rabbit Farm from April 1991 to April 1992. 95 rabbits (29 German Angora, 36 Chinase Angora and 30 F1 rabbits of the German (males) x Chinase (females) were raised under the same conditions. In each type, the blood of 3 to 6 rabbits, 20, 45, 90 and 180 days old, was taken for the measuring of biochemical traits. The results show that body weight, body measurement and wool production increase as the rabbit's age increases. ALP activity first increases and decreases afterwards, as the rabbit grows older. ACP activity changas in the same pattern as ALP, in German Angora and Chinase Angora. But in the crossbreds of German x Chinase Angora, ACP activity increases continuously. The least square analysis indicates that wool yields of German Angora at 90 and 180 days are significantly higher than those of Chinase Angora (P<0.05). Hb contents of the German at 45 and 90 days are significantly higher than those of Chinase, and the latter is significantly higher than the F1 rabbits (P<0.05). At 45 days, Chinase Angora has the highest ALP activity, F1 the second and German the lowest, and the differences among them are significant (P<0.05). At 45 days, ACP activity of German Angora is significantly higher than that of Chinase Angora, and the latter higher than that of F1 rabbits (P<0.05). But at 90 days and 180 days, ACP activity of F1 is significantly higher than that of German and Chinase Angora, and the German is still higher than the Chinase (P<0.05). Using body weight, body length, chest girth and wool yield as one variate group and Hb content, GPT, ALP, and ACP activity as another group, the canonical correlation coefficients of the first three pairs of variates have been calculated, which are 0.8295, 0.7395 and 0.5835 respectively (P<0.05 or 0.01). lts correlation information ratio is 87.34 %. The principal factors which affect the first pair of canonical correlation variates are body length (a2 = 1.3783), wool yield (a4 = -1.0584), GPT activity (b2 = 0.6145) and ACP activity (b4 = 0.5441). Using body weight, body length and chest girth as one variate group an Hb content, GPT, ALP and ACP activity as another group, the canonical correlation coefficients of the first three variate pairs have been obtained, which are 0.9478, 0.5632 and 0.4170 respectively (P<0.05 or 0.01). lts correlation information ratio is 100 %. The principal factors affecting the correlation of the first variate pair are body weight (a1 = 0.7631), chest girth (a3 = -0.6472) and Hb content (b1 = 0.7807).
- PublicationNUTRITIONAL EFFECT OF MULBERRY ("MORUS ALBA") LEAVES AS SOLE RATION OF ADULT RABBITS(World Rabbit Science. ICTA. UPV, 1993) Deshmukh, S.V.; Pathak, N.N.; Takalikar, D.A.; Digraskar, S.U.[EN] Nutritiva value of mulberry leaves as a sole ration for adult rabbits was determinad by feeding mulberry leaves to 1 O New Zealand White rabbits ( 1540 ± 62g, 35 weeks old). In DM mulberry leaves had CP 22.13, EE 3.90, CF 5.90, Ash 13.35, NFE 54. 72, NDF 36.35, ADF 31.52, Ca 3.30 and P 1.43 %. Except EE, all nutrients had fairly good digestible coefficients. The DM intake was 68.52g/day, 5.30g/1 OOg body weight and 59.1 g/kg wo. 75. Average daily intake of digestible crude protein (DCP) (11.2 g) and of digestible energy (175 kcal) was adequate for maintenance of body weights of rabbits. In each 100g DM, mulberry leaves had 16.38 ± 0.45g DCP for rabbits. Calculated DE/kg DM was found to be 2580 kcal. The results suggested that the mulbery leaves can be used as single feed for adult rabbits and may help in economic rabbit production.
- PublicationINFLUENCE OF TWO ISO-ENERGETIC DIETS (STARCH vs FAT) ON EXPERIMENTAL COLIBACILLOSIS (EPEC) AND IOTA-ENTEROTOXAEMIA IN EARLY WEANED RABBITS(World Rabbit Science. ICTA. UPV, 1993) Peeters, J.E.; Orsenigo, R.; Maertens, L.; Gallazzi, D.; Colin, M.[EN] Rabbíts weaned at 32 days of age were fed one of two isoenergetic (10.6 MJ ADE/kg) and iso-protein (17 %) feeds ad libitum: feed S with 25.8 % starch, 3.2 % fat and 16.2 % acid detergent fibre (ADF) and feed F with 13.1 % starch, 6. 7 % fat and 17.9 % ADF. Both groups were inoculated orally with a toxinogenic Clostridium spiroforme strain NCTC 11493 and/or with a moderately enteropathogenic Escherichia coli (EPEC) strain belonging to sero/biotype 0132/2+. The results suggest that colibacillosis favours iota-enterotoxaemia and vice-versa. Also the feed shows a distinct influence. Feed S favoured iota-enterotoxaemia. The effect was most pronounced in rabbits suffering from simultaneous EPEC infection. On the other hand the same feed inhibited saprophytic E. co/i-proliferation. In case of experimental EPEC infection, feed S did not inhibit the huge faecal E. coli output, nor the associated diarrhoea and mortality. Yet, histological lesions were less pronounced in the S-group. Moreover, entero-adherent EPEC were still present in one rabbit out of five in group F 28 days p.i., while they were not detectad in any of the S-rabbits. In case of mixed infection (C. spiroforme + EPEC), mortality was lower in group S (2/10) than in group F (5/10). So, feed F might favour colibacillosis. lt was hypothesised that feeds of this type may contribute to the persistence of healthy carriers of enteropathogenic E. coli.
- PublicationEffect of dietary fibre and fat content on the reproductive performance of rabbit does bred at two remating times during two seasons(World Rabbit Science. ICTA. UPV, 1993) Barreto, G.; De Blas, J.C.; Comisión Interministerial de Ciencia y Tecnología; Centro para el Desarrollo Tecnológico Industrial[EN] One hundred and forty one rabbit does were used to study the effect of tour diets differing in energy concentration (8.92 to 11.86 MJ DE/kg), fibre and fat content, two parturition-remating intervals (1 or 9 d), and two seasons (hot season and rest of the year) on productiva performance throughout a 18 months period. Addition of a 3.5 % of pork lard to a diet containing 18 % ADF implied an increase of energy digestibility (by 8 %, P<0.05), DE content (by 15 %, P<0.001), feed intake (by 6 %, P<0.1), and DE intake (by 22.5 %, P<0.05). Fat addition did not affect average weight of does, prolificacy, or replacement rate, but improved fertility (by 7%, P<0.1), weaning weight per pyp (by 3%, P<0.1), and numerical proauctivífy per cage and year (by 12 %, P<0.05). An increase of dietary fibre content (from 18.0 to 23.8 % ADF) decreased linearly (P<0.001) energy digestibility, and DE content, but increased (P<0.05) feed intake, so that neither DE intake (2.56 MJ/d as average) or does productivity were significantly affected. lntensification of reproduction system elicited a shorter parturition interval (- 3.2 days, P<0.05), but also a decrease of average does weight (- 0.14 kg, P<0.05), a lower conception rate (P<0.05), and a higher pup mortality, so that numerical productivity per cage and year was not significantly affected by treatment. The increase of temperatura during the hot season decreased feed intake (by 21 %, P<0.001), average weight of does (- 0.15 kg, P<0.05), fertility (- 16 %, P<0.001), numerical productivity (- 23 %, P<0.001), and weaning weight (- 7 %, P<0.01). No significant effects of the interactions diet x remating interval or diet x season were found on any of the variables studied.