Recursos de colección

RiuNet. Repositorio institucional de la Universitat de Valencia (102.815 recursos)

RiuNet es el Repositorio Institucional de la Universitat Politècnica de València, gestionado por la Biblioteca, cuyo objetivo es ofrecer acceso en Internet a la producción científica, académica y corporativa de la comunidad universitaria con la finalidad de aumentar su visibilidad y hacerla accesible y preservable.

Mostrando recursos 1 - 13 de 13

  1. VARIANCE COMPONENTS AND RESPONSE TO SELECTION FOR REPRODUCTIVE, LITTER AND GROWTH TRAITS THROUGH A MULTI-PURPOSE INDEX

    Moura, A.S.A.M.T; Costa, A.R.C.; Polastre, R.
    [EN] Variance components and genetic trends were estimated for number of services/parturition (NS), parturition interval (PI), number born alive (NB), number weaned/litter born (NW), litter weaning weight (LW), 30-d individual weaning (WW) and 70-d (W70) weights and a multipltHrait selection index (MI) in rabbits from a closed population in Botucatu, Southeast Brazil. Phenotypic values for two litter (NW and LWW), and two individual performance (WW and W70) traits were included in the index. Individual selection according to the multiple-trait index was practised for a 2.6-yr period (January 1992 through July 1994). PerfQrrnance records collected for five years (July 1989 through July 1994) on 2,162 parturitions, 2,122 litters, and 10,440 individuals were...

  2. VARIANCE COMPONENTS AND RESPONSE TO SELECTION FOR REPRODUCTIVE, LITTER AND GROWTH TRAITS THROUGH A MULTI-PURPOSE INDEX

    Moura, A.S.A.M.T; Costa, A.R.C.; Polastre, R.
    [EN] Variance components and genetic trends were estimated for number of services/parturition (NS), parturition interval (PI), number born alive (NB), number weaned/litter born (NW), litter weaning weight (LW), 30-d individual weaning (WW) and 70-d (W70) weights and a multipltHrait selection index (MI) in rabbits from a closed population in Botucatu, Southeast Brazil. Phenotypic values for two litter (NW and LWW), and two individual performance (WW and W70) traits were included in the index. Individual selection according to the multiple-trait index was practised for a 2.6-yr period (January 1992 through July 1994). PerfQrrnance records collected for five years (July 1989 through July 1994) on 2,162 parturitions, 2,122 litters, and 10,440 individuals were...

  3. VARIANCE COMPONENTS AND RESPONSE TO SELECTION FOR REPRODUCTIVE, LITTER AND GROWTH TRAITS THROUGH A MULTI-PURPOSE INDEX

    Moura, A.S.A.M.T; Costa, A.R.C.; Polastre, R.
    [EN] Variance components and genetic trends were estimated for number of services/parturition (NS), parturition interval (PI), number born alive (NB), number weaned/litter born (NW), litter weaning weight (LW), 30-d individual weaning (WW) and 70-d (W70) weights and a multipltHrait selection index (MI) in rabbits from a closed population in Botucatu, Southeast Brazil. Phenotypic values for two litter (NW and LWW), and two individual performance (WW and W70) traits were included in the index. Individual selection according to the multiple-trait index was practised for a 2.6-yr period (January 1992 through July 1994). PerfQrrnance records collected for five years (July 1989 through July 1994) on 2,162 parturitions, 2,122 litters, and 10,440 individuals were...

  4. TECHNICAL NOTE : ATTEMPTS TO HARMONIZE CHEMICAL ANALYSES OF FEEDS AND FAECES,FOR RABBIT FEED EVALUATION

    E.G.R.A.N.
    [EN] The aim of this document is to describe harmonized procedures of sorne basic chemical analyses useful for rabbit compound feeds and faecesthat have been approved within !he six teams forming the EGRAN group. For each criterion (dry matter, ash, energy, nitrogen, fa!, fibre), we report a brief definition, its main interest, and sorne general references used in animal research (ISO or AOAC standards). We also report !he principie of the analytical determination, a brief description of the practica! procedures, sorne suggestions, !he among laboratory variability recently measured in a collaborative study on digestibility of feeds for growing rabbit, and the recommended leve! of tolerance.

  5. TECHNICAL NOTE : ATTEMPTS TO HARMONIZE CHEMICAL ANALYSES OF FEEDS AND FAECES,FOR RABBIT FEED EVALUATION

    E.G.R.A.N.
    [EN] The aim of this document is to describe harmonized procedures of sorne basic chemical analyses useful for rabbit compound feeds and faecesthat have been approved within !he six teams forming the EGRAN group. For each criterion (dry matter, ash, energy, nitrogen, fa!, fibre), we report a brief definition, its main interest, and sorne general references used in animal research (ISO or AOAC standards). We also report !he principie of the analytical determination, a brief description of the practica! procedures, sorne suggestions, !he among laboratory variability recently measured in a collaborative study on digestibility of feeds for growing rabbit, and the recommended leve! of tolerance.

  6. PERFORMANCES DES ELEVAGES CUNICOLES MODERNES EN TUNISIE

    BERGAOUI, R.; KRIAA, S.
    [EN] Modern rabbit production in Tunisia started in 1980's. The following article deals with technical and economical performances in rabbit sector studied through a survey including 62 production units of the Tunis and Bizerte areas. Data analysis shows that average number of rabbit does per rabbitry was 112. The numerical productivity was poor : 28.7 rabbits sold/mother-cage/year. This low productivity can be considered as a consequence of bad management decisions mainly in term of repnduction control, breeding animal renewal and general management of the rabbitry. Moreover, low performances can be attributed to poor training of technicians and to low quality of available animals, nutrition or housing conditions... These performances are...

  7. PERFORMANCES DES ELEVAGES CUNICOLES MODERNES EN TUNISIE

    BERGAOUI, R.; KRIAA, S.
    [EN] Modern rabbit production in Tunisia started in 1980's. The following article deals with technical and economical performances in rabbit sector studied through a survey including 62 production units of the Tunis and Bizerte areas. Data analysis shows that average number of rabbit does per rabbitry was 112. The numerical productivity was poor : 28.7 rabbits sold/mother-cage/year. This low productivity can be considered as a consequence of bad management decisions mainly in term of repnduction control, breeding animal renewal and general management of the rabbitry. Moreover, low performances can be attributed to poor training of technicians and to low quality of available animals, nutrition or housing conditions... These performances are...

  8. NOTE: RELATIONSHIP BETWEEN SCROTAL TEMPERATURE AND SPERM MORTA LITY OF THE NEW ZEALAND WHITE RABBIT

    KASA, I.W:; THWAITES, C.J.
    [EN] Eight mature New Zealand White bucks (3049 ± 247g líve weight) were randomly allocated to one of 4 groups in descending order of the density of their semen. Rabbits were raised at 20ºC except during a single short period of 8 hours when they were introduced in a climatic chamber (CC) regulated at 20ºC (control], 32ºC, 32ºC + infrared heating at 1,9MJ/m2/h or 34ºC (groups 1 to 4). Semen quality was evaluated before treatment and then once a week during 8 consecutive weeks. During the stay in the CC, scrotal temperature increased rapidly within the first hour. Average scrotal temperature increased (P < 0.05) with each shortterm environmental temperature...

  9. NOTE: RELATIONSHIP BETWEEN SCROTAL TEMPERATURE AND SPERM MORTA LITY OF THE NEW ZEALAND WHITE RABBIT

    KASA, I.W:; THWAITES, C.J.
    [EN] Eight mature New Zealand White bucks (3049 ± 247g líve weight) were randomly allocated to one of 4 groups in descending order of the density of their semen. Rabbits were raised at 20ºC except during a single short period of 8 hours when they were introduced in a climatic chamber (CC) regulated at 20ºC (control], 32ºC, 32ºC + infrared heating at 1,9MJ/m2/h or 34ºC (groups 1 to 4). Semen quality was evaluated before treatment and then once a week during 8 consecutive weeks. During the stay in the CC, scrotal temperature increased rapidly within the first hour. Average scrotal temperature increased (P < 0.05) with each shortterm environmental temperature...

  10. EFFECT OF BREED AND SEX ON RABBIT CARCASS YIELD AND MEAT QUALITY

    Ortiz Hernández, J.A.; Rubio Lozano, M.S.
    [EN] The objective of this work was to det~rmine the differences on yield and quality of carcasses of different sex (male and female) and breed (New Zealand (NZ), Californian (CA), Chinchilla (CH) and Rex (RX)). Ten rabbits (balanced sexes) of each breed were used. Rabbits were grown under the same conditions, fed the same commercial diet and slaughtered when reached Mexican commercial weight (2.00 kg). Carcass yield, percentage of the main tissues, chemical composition of meat, shear force of cooked longissimus dorsi muscle and sensorial characteristics were evaluated. Main effects (breed and sex) and interactions were statistically analyzed. Breeds were similar on dressing percentages. However, meat from 1 JZ carcasses had...

  11. EFFECT OF BREED AND SEX ON RABBIT CARCASS YIELD AND MEAT QUALITY

    Ortiz Hernández, J.A.; Rubio Lozano, M.S.
    [EN] The objective of this work was to det~rmine the differences on yield and quality of carcasses of different sex (male and female) and breed (New Zealand (NZ), Californian (CA), Chinchilla (CH) and Rex (RX)). Ten rabbits (balanced sexes) of each breed were used. Rabbits were grown under the same conditions, fed the same commercial diet and slaughtered when reached Mexican commercial weight (2.00 kg). Carcass yield, percentage of the main tissues, chemical composition of meat, shear force of cooked longissimus dorsi muscle and sensorial characteristics were evaluated. Main effects (breed and sex) and interactions were statistically analyzed. Breeds were similar on dressing percentages. However, meat from 1 JZ carcasses had...

  12. DOE AND KIT PERFORMANCE IN A SMALL RABBIT POPULATION FROM SUBTROPICAL TRINIDAD

    RASTOGI, R.K.
    [EN] This paper summarizes performance data collected from 226 does producing 1017 litters during 1985-93. Local, high-grade New Zealand White rabbits were housed in wire cages and fed mainly broiler finisher pellets (18% CP) and grass, free choice. The average kit weights at 3, 4 (weaning) and 12 weeks were 224 g, 311 g and 1.61 kg, respectively. The averages for daily gain between 3-4 and 4-12 weeks were 12 and 23 g, respectively. On average, a total of 5.4 kits were born per litter , of which 5.2 were alive; 4.3 survived until weaning at 4 weeks and only 3.9 were alive at 12 weeks . The...

  13. DOE AND KIT PERFORMANCE IN A SMALL RABBIT POPULATION FROM SUBTROPICAL TRINIDAD

    RASTOGI, R.K.
    [EN] This paper summarizes performance data collected from 226 does producing 1017 litters during 1985-93. Local, high-grade New Zealand White rabbits were housed in wire cages and fed mainly broiler finisher pellets (18% CP) and grass, free choice. The average kit weights at 3, 4 (weaning) and 12 weeks were 224 g, 311 g and 1.61 kg, respectively. The averages for daily gain between 3-4 and 4-12 weeks were 12 and 23 g, respectively. On average, a total of 5.4 kits were born per litter , of which 5.2 were alive; 4.3 survived until weaning at 4 weeks and only 3.9 were alive at 12 weeks . The...

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