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World Rabbit Science

Mostrando recursos 1 - 20 de 705

  1. The effect of age on the carcass composition, portion yield and proximate composition of two rabbit genetic types in South Africa

    North, M.K.; Nkhabutlane, P.; Hoffman, L.C.
    [EN] This study investigated the carcass component yields and meat proximate composition of 2 rabbit genetic types (Californian and hybrid New Zealand Red×Californian), with 5 rabbits per genetic type being slaughtered every 2 wk throughout the study period (9-17 wk) to evaluate the effect of age on these traits. Slaughter weight, reference yield, portion yield (hind leg, foreleg and fore part, as percentage of slaughter weight), meat yield, skin weight and the fat content of the meat (percentage of wet weight) increased significantly with age, while the full gastrointestinal tract, liver, head and feet decreased significantly. This is likely a...

  2. Pyrosequencing study of caecal bacterial community of rabbit does and kits from a farm affected by epizootic rabbit enteropathy

    Abecia, L.; Rodríguez-Romero, N.; Martínez-Fernández, G.; Martínez Vallespín, Beatriz; Fondevila, M.
    [EN] Epizootic Rabbit Enteropathy (ERE) is a disease of unknown aetiology that mainly affects post-weaning animals. Caecotrophs from animals in a farm affected by ERE were analysed to identify changes in the microbiological profile of growing rabbits. Does and kits at weaning (28 d) and the same rabbits ten days later (38 d) were used for a comparison using Roche 454 pyrosequencing of hypervariable V3-V5 regions of the 16S rRNA genes. The caecal bacterial community was dominated by the Firmicutes phylum (about 80%), followed by Bacteroidetes (15%), although relative abundances changed according to animal age (among does and kits at...

  3. Energy balance and body reserves in rabbit females selected for longevity

    Garreau, H.; Larzul, C.; Tudela, F.; Ruesche, J.; Ducrocq, V.; Fortun-Lamothe, L.
    [EN] The aim of this study was to compare the energy balance and dynamic of body reserves in rabbit females divergently selected for longevity. One hundred and twenty-nine females from a high longevity line (HL) and 131 females of a low longevity line (LL) were studied from the 1st to the 3rd kindling. Litter size and weight and female body weight were measured at kindling (1st, 2nd and 3rd), insemination (2nd and 3rd) and at weaning (1st and 2nd). The total body electric conductivity (TOBEC) method was used to estimate the body reserves in all females at artificial insemination and...

  4. Effects of parsley supplementation on the seminal quality, blood lipid profile and oxidant status of young and old male rabbits

    El-Gindy, Y.M.; Zeweil, H.S.
    [EN] The high unsaturation levels of spermatozoal membrane make it very susceptible to oxidative damage and this problem increases with advancing age. In this study, the aim is to investigate whether parsley seed (PS) has a protective effect on semen quality, serum lipid profile and antioxidative status of old and young bucks. Male rabbits (n= 36) (18 young 9-12 mo old and 18 old 36-42 mo old) were each assigned to 3 dietary treatments (a control and 2 levels of PS: 0.3 and 0.6 kg/100 kg diet) to evaluate the ability of parsley to enhance bucks’ reproductive status. Most of...

  5. Effects of a short-term feed restriction on growth performance, blood metabolites and hepatic IGF-1 levels in growing rabbits

    Lu, J.; Shen, Y.; He, Z.; Dai, X.; Wang, D.; Zhang, J.; Li, H.
    [EN] A total of 144 weaned hybrid HYLA rabbits (40-day-old) were randomly divided into 4 groups, to investigate the effects of the intensity of one week’s feed restriction on short- and medium-term growth performance, blood metabolites and hepatic IGF-1 in growing rabbits. Restricted groups were fed with 30% (Group L30), 50% (Group L50) 70% (Group L70) of ad libitum feeding for 1 wk and then fed ad libitum until the end of the experiment (75 d of age). The control group (Group AL) was fed ad libitum throughout the experiment. Total feed intake (–15.8%) and feed conversion ratio (–13.2%) were...

  6. Effect of tropical green forage Pueraria phaseoloides addition to a pelleted complete feed on rabbit growth performance and digestion

    Kimsé, M.; Yapi, M.Y.; Karamoko, M.; Gidenne, T.; Zongo, M.; Gnanda, B.I.; Akoutey, A.; Bodji, N.C.; Fantodji, A.; Otchoumou, A.
    [EN] The aim of this work was to study the effect of tropical green forage on rabbit growth performance and apparent digestibility. Thirty rabbits weaned at 35 d of age were individually caged and allotted to 2 dietary treatments. From 35 to 90 d of age, the control group C was fed ad libitum with commercial pelleted diet C only, while the test group was fed the C diet and forage Pueraria phaseoloides (Pp) ad libitum. Individual water and feed intake, body weight gain, nutrient apparent digestibility, red and white blood cells were studied. Mean housing temperature was 27.7°C. Water...

  7. Effect of substituting guinea grass with soybean hulls on production performance and digestion traits in fattening rabbits

    Shang, S.M.; Wu, Z.Y.; Liu, G.Y.; Sun, C.R.; Ma, M.W.; Li, F. C.
    [EN] The objective of this study was to evaluate the use of soybean hulls (SH) to substitute guinea grass (GG), traditionally used as fibre source in the diets of fattening rabbits on performance, coefficients of total tract apparent digestibility (CTTAD) of nutrients, gastrointestinal tract development and caecum fermentation. A total of 160 mixed sex Hyla commercial meat rabbits were allocated to 4 experimental groups (40 per treatment) differing in the SH level inclusion in the diet offered to rabbits from 40 to 90 d of age: 0, 50, 100 and 200 g/kg as-fed basis: SH0, SH50, SH100 and SH200 groups,...

  8. Effect of a lytic bacteriophage on rabbits experimentally infected with pathogenic Escherichia coli

    Zhao, J.; He, L.; Pan, L.; Liu, Y.; Yao, H.; Bao, G.
    [EN] Pathogenic Escherichia coli (E. coli) is severely threatening the rabbit industry in China, and the concern over antibiotic-resistant bacteria has given rise to an urgent need for antibiotic alternatives. In this study, a member (ZRP1) of the Myoviridae family was isolated from rabbit faeces using a strain of rabbit atypical enteropathogenic E. coli (ZR1) as host. The one-step growth curve indicated that the latent period was around 25 to 30 min and the burst size was 144±31 plaque-forming unit/cell. The rate of phage-resistant mutation was 7×10–5±4×10–5. When the bacteriophage input at the multiplicity of infection (MOI) was 0.1, 1...

  9. Dried brewers grains in growing rabbits: nutritional value and effects on performance

    Lima, P.J.D.O.; Watanabe, P.H.; Cândido, R.C.; Ferreira, A.C.S.; Vieira, A.V.; Rodrigues, B.B.V.; Nascimento, G.A.J.; Freitas, E.R.
    [EN] Two assays were carried out to determine i) the nutritional value of dried brewers’ grains and ii) the effects of inclusion of this ingredient in growing rabbit diets on animal performance and economic performance of the breeding unit. In the digestibility assay, a total of 28 male rabbits were distributed in 2 groups differing in the diet offered to animals: a reference diet (35.51% neutral detergent fibre and 16.50% crude protein [CP]) and a test diet (60% of reference diet and 40% of dried brewers grains). The dried brewers’ grain contained 37.9% of CP and 3371 kcal digestible energy/kg...

  10. Abstracts of the 42nd Symposium on Cuniculture, ASESCU Murcia, Spain, 11th-12th May, 2017

    Conferences, Congresses, Symposiums..., Abstracts,
    [EN] The 42nd Congress of the Spanish Association of Cuniculture (ASESCU) was held in Murcia from 11th to 12th May 2017, hosted by the University of Murcia’s Veterinary Faculty. The main papers focussed on analysing the situation of rabbit farming in the Murcia region, the demedicalisation of rabbit health management, a new law on farmers’ organisations and the main presentation forms of infections associated with Staphylococcus aureus. A specific session was devoted to explaining the objectives and progress of the research projects supported by the partnership between the Spanish Institute of Agricultural Research (INIA) and the Rabbit Meat Marketing Board...

  11. Semen characteristics and sexual hormones of Hy-Plus rabbit bucks influenced by a dietary multi-enzymes additive

    Gado, H.; Mellado, M.; Salem, A.; Zaragoza, A.; Seleem, T.S.T.
    A total of 144 adult Hy-Plus rabbit bucks were randomly assigned into  four treatments of 36 replicates each, in a completely randomized design. Animals were fed ad libitum on basal diet supplemented with an enzyme complex (EZ) at 0 (EZ0), 1 (EZ1), 3 (EZ3) and 5 (EZ5) kg/ton of feed. Total sperm count was higher (P<0.05) in EZ5 than in EZ0. Sperm motility increased with increasing levels of the EZ additive being lowest for EZ0 and highest for EZ5 rabbits (P<0.05). Percentage of dead sperm was higher (P<0.05) in EZ0 than in EZ5 rabbits. Rabbit bucks received the highest levele of...

  12. Milk yield prediction at late lactation in reproductive rabbit does

    Arnau Bonachera, Alberto; Cervera Fras, Mª Concepción; Blas Ferrer, Enrique; Pascual Amorós, Juan José
    Separating kits and mother to determine milk yield at 4th wk of lactation (MY4) could have negative consequences on the training and development of young rabbits. In this work, a total of 313 lactation curves (28 d long), taken from 2 different trials, were used to fit regression models to estimate MY4. In both trials, females were subjected to a semi-intensive reproductive rhythm [insemination at 11 d post-partum (dpp) and weaning at 28 dpp], but diets, genetic types, parity order and day of controls were slightly different. The models included variables which, according to the bibliography, are related to milk yield...

  13. Effect of human menopausal gonadotropin on testicular morphometry, gonadal and extragonadal sperm reserves of rabbit bucks

    Ansa, Anietie Archibong; Imasuen, James A.
    Testicular morphometry, gonadal and extragonadal sperm reserves of rabbit bucks treated with Human Menopausal Gonadotrophin (Menogon®) were studied. Twenty-four crossbred rabbit bucks weighing 1.3-1.6 kg at 15-17 wk were randomised into 4 treatment doses of 0 (control), 7.5, 15.0, and 22.5 I.U. in a completely randomised design with 6 bucks per group. A vial of Menogon® was reconstituted in 1 mL of physiological saline solution and administered intramuscularly at 72 h intervals for 56 d prior to commencement of sample collection. Parameters evaluated were ejaculate concentration, testicular morphometry, gonadal and extragonadal sperm concentrations. Results for ejaculate concentration (86, 110, 186, and 135×106/mm3) revealed a significantly (P<0.05) higher...

  14. Changes in responsiveness to kit odours across pregnancy: relevance for the onset of maternal behaviour

    Chirino, Rosario; González-Mariscal, Gabriela
    Virgin does are indifferent to foster kits but lesions to the main or accessory olfactory systems allow them to behave “maternally” (i.e., they crouch over the litter and allow suckling). This suggests that kit-derived olfactory cues are aversive to virgins but not to lactating does. We hypothesised that the valence of such olfactory cues changes throughout gestation so that, at parturition, does are attracted to the newborn and can then show placentophagia, clean the kits and nurse them. To explore this hypothesis we exposed does to 2 nest boxes containing a variety of pup-derived vs. “neutral” odours, quantifying the number of sniffs and entrances to each...

  15. Abstracts of the 40th Symposium on Cuniculture, ASESCU Santiago de Compostela, Spain, 28th-29th May, 2015

    World Rabbit Science
    The 40th Congress of the Spanish Association of Cuniculture (ASESCU) was held in Santiago de Compostela from 28th to 29th May 2015. This is the 40th edition of the conference, held annually without interruption since 1976. Main papers focused on analysing the current rabbit sector situation in the north-western Iberian Peninsula, genetic improvement of meat rabbit and foundation of new lines. The future of meat rabbit production and the rabbit meat production value chain was discussed, with the results of the partnership between the Spanish Institute of Agricultural Research (INIA) and the rabbit marketing board (INTERCUN) to support research projects. A round table was also held...

  16. Short communication: Influence of vitamins C and E on sperm motility of rabbit bucks

    Najjar Ben Maâtoug, Amel; Ben Saïd, S.; Najjar, T.; Kalamoun, S.; Ben Khalifa, N.; Ben Aïchae, E.; Ben Mrad, M.
    The objective of the study is to investigate the effect of vitamin C and E supplementation on rabbit sperm motility. Forty INAT breed bucks aged 8.5 mo were divided into 2 groups: control group (C) and treated group (T) receiving vitamins C (1 g/L) and E (1 g/L) incorporated in the drinking water. Semen was collected using an artificial vagina over 6 wk (C, total ejaculates=81; T, total ejaculates=76). The massal motility (MM) was evaluated in the fresh and raw semen. Then, the individual motility at 0 (IM0), 2 (IM2) and 4 h (IM4) after semen collection was determined in...

  17. Effect of a diet containing white lupin hulls (Lupinus albus cv. Amiga) on total tract apparent digestibility of nutrients and growth performance of rabbits

    Volek, Zdenek; Volková, Lenka; Marounek, Milan
    The objective of this study was to evaluate the effect of the inclusion of white lupin hulls in a rabbit diet on the digestibility of nutrients and growth performance. Two experimental diets were formulated: C [control: 168 g crude protein (CP) and 409 g neutral detergent fibre (NDF)/kg) and WLH diet (substituting 100 g wheat bran by 50 g barley and 50 g white lupin hulls/kg: 162 g CP and 391 g NDF/kg). A total of 24 weaned rabbits were individually housed, randomly allocated to 2 groups and fed one of the 2 experimental diets from 31 to 73 d...

  18. Abstracts of the "XXXVII Symposium de Cunicultura de ASESCU". Barbastro (Spain) 24-25th of May 2012.

    Barbastro (Spain) 24-25th May of 2012, Abstracts del XXXVII Symposium de Cunicu
    The annual Congress of the Spanish Association of Cuniculture (ASESCU) was held in Barbastro (province of Huesca, autonomous community of Aragón) on 24-25th May of 2012. The 37th edition was mainly devoted to analyse the present situation of the rabbit sector, as well as some new aspects in relation to diseases of the rabbit. It was presented an overview of the situation of the rabbit farming in Aragón, a commercial analysis of the rabbit farming sector in Spain, a main paper on the role of rural development as a complement to rabbit farming, and an analysis of the production cost...

  19. A meta-analysis on the role of soluble fibre in diets for growing rabbits

    Trocino, Angela; García Alonso, Javier; Carabaño, Rosa; Xiccato, Gerolamo
    [EN] In this review, the methods used to measure fibre and soluble fibre fractions are briefly presented and the effects of the soluble fibre content in diets for growing rabbits reviewed by a meta-analysis of studies available in literature, with the aim of elucidating the relationships with other dietary nutrients. Soluble fibre was assumed as the difference between total dietary fibre (TDF) and neutral detergent fibre (NDF), as it is simple to obtain and has been measured in numerous studies. Dietary soluble fibre content affects the digestive utilisation of soluble and insoluble fibre fractions and its increase is associated with...

  20. Sodium butyrate in growing and fattening diets for early-weaned rabbits

    Ribeiro, Joana; Gaspar, Sandra; Pinho, Mário; Freire, João P. B.; Falcão-e-Cunha, Luisa
    [EN] To study the effect of adding coated sodium butyrate (SB) to growing-fattening rabbit diets, 2 trials were conducted. In trial 1, 180 rabbits were housed in pairs and fattened from 23 (weaning) to 63 d of age to evaluate their zootechnical performance. Trial 2 involved 30 rabbits, from 23 to 37 d of age and housed individually in digestibility cages, to evaluate digestibility, caecal fermentative activity and morphology of the intestinal mucosa. In both trials rabbits were randomly divided into 2 groups, each receiving one of the following diets: control diet [CTR, 360 g neutral detergent fibre (NDF) and...

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