World Rabbit Science - Vol. 27 (4)-2019
Permanent URI for this collection
Tabla de contenidos
- Composition of rabbit caecal microbiota and the effects of dietary quercetin supplementation and sex thereupon
- Effects of replacement of alfalfa by big-leaf mulberry on growth performance, digestion and meat quality in growing rabbits
- Does wild rabbit population size affect connectivity?
- High doses of cobalt inhibited hair follicle development in Rex Rabbits
- Performance of rabbit does housed in collective pens and individual cages
- Effects of sublethal doses of gossypol on haematological properties and biochemical metabolites of male rabbit
- Identification of two novel single nucleotide polymorphism sites in the Myostatin (MSTN) gene and their association with carcass traits in meat-type rabbits (Oryctolagus cuniculus)
Browse
Recent Submissions
- PublicationPerformance of rabbit does housed in collective pens and individual cages(Universitat Politècnica de València, 2019-12-23) Machado,L.C; Martínez Paredes, Eugenio Melchor; Cervera Fras, Mª Concepción; Departamento de Ciencia Animal; Instituto Universitario de Ciencia y Tecnología Animal; Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brasil[EN] In society today, there is increasing concern for the welfare of farm animals. New models of rabbit breeding are proposed, such as group housing of rabbit does in a semi-group system or environmental enrichment of individual housing. This work aimed to evaluate the reproductive performance and metabolic aspects of rabbit does housed in collective pens, comparing them to individual cages provided with a platform. Forty-eight animals were distributed in 24 individual cages (40×98×57 cm; width, length and height) and four collective pens (six does per pen; 240×100×65 cm) and remained during four cycles. The does previously housed in collective pens gained less weight and reached lighter weights by the first insemination day (3669 vs. 3872 g; P<0.01), but regained weight over the cycles and had a similar weight during the experiment (4306 vs. 4329 g). It was observed that there was a lower feed intake in the period before delivery in collective pens, which contributed to the lower kit b
- PublicationDoes wild rabbit population size affect connectivity?(Universitat Politècnica de València, 2019-12-23) Machado, Rui; Santos, Pedro; European Regional Development Fund; Fundação para a Ciência e a Tecnologia, Portugal[EN] Wild rabbit is a relevant species in the Iberian Peninsula due to its ecological and economic roles. Conservationists and game managers therefore have a shared interest in assuring the existence of resilient and sustainable populations. Although management principles and guidelines are mostly known and understood, often the results are not as good as expected. Local abundance can vary significantly even in short periods, while the colonisation of adjacent territories is uncommon, probably due to the territorial behaviour of the species. Aware that the foundation of nuclei requires interaction among individuals, we hypothesised that rabbit abundance plays a significant part in population connectivity. In order to find out whether the population size affects nuclei connectivity, we conducted a graph theory-based connectivity analysis. The results confirm that connectivity grows with rabbit abundance, but only to a certain degree, and there is a spatial separation of the nuclei regardle
- PublicationEffects of replacement of alfalfa by big-leaf mulberry on growth performance, digestion and meat quality in growing rabbits(Universitat Politècnica de València, 2019-12-23) Wu, Xue Zhuang; Yang, Pei Long; Gao, Xiu Hua; Wen, Zhi Guo; Dai, Si Fa; Zhu, Ming Xia; Wang, Li Xin; National Natural Science Foundation of China[EN] This study aimed to investigate the effect of sundried big-leaf mulberry (BLM) as a replacement for alfalfa on the growth performance, digestibility of nutrients, nitrogen (N) utilisation and meat quality in New Zealand White rabbits. One hundred and sixty weaned rabbits, aged 35±1 d and with a body weight of 755±26 g, were randomly assigned to the 4 treatments with 20 replicates of 2 rabbits (1 male and 1 female) each. Animal performance was evaluated between the 35th and 77th d of age in 40 animals per treatment. The coefficients of total tract apparent digestibility (CTTAD) of nutrients and N utilisation were measured between 77 to 83 d of age in 30 animals per treatment. The control rabbits were fed a corn-soybean meal-alfalfa meal based diet. The three experimental groups were fed a similar diet in which the alfalfa meal was replaced by 10% (BLM10), 20% (BLM20), or 30% (BLM30) BLM. The final body weights and average daily gain were higher (P<0.05) in BLM20 rabbits compared to c
- PublicationIdentification of two novel single nucleotide polymorphism sites in the Myostatin (MSTN) gene and their association with carcass traits in meat-type rabbits (Oryctolagus cuniculus)(Universitat Politècnica de València, 2019-12-23) Yang, L.Q; Zhang, K.; Wu, Q. Y; Li, J.; Lai, S. J; Song, T. Z; Zhang, M.; Sichuan Agricultural University; National Modern Rabbit Production Industry Special Fund[EN] Two unknown single nucleotide polymorphism (SNP) sites in exons 1 (c.194C>T) and 2 (c.445T>A) of meat-type rabbit MSTN gene were identified in the study. Our objective was to analyse the population genetics structure of the two novel SNP sites in 230 individuals from six breeds and their associations with carcass traits of rabbits. We found that live body weight (BW), cold carcass weight (CCW), reference carcass weight (RCW), CCW percentage (PCCW) and RCW percentage (PRCW) of the rabbits with the genotype CC at the c.194C>T of exon 1 or AA at the c.445T>A of exon 2 were significantly higher than those with other genotypes. Diplotype significantly affected BW, RCW, CCW, PRCW (P<0.01) and PCCW and PCM (P<0.05). CC/AA was the advantageous diplotype for BW, RCW, CCW and PCM, and TT/AA was the advantageous diplotype for PCCW and PRCW. In contrast, TT/TT was the negative diplotype for BW, CCW, RCW, PCCW and PRCW, and TT/AA was the negative diplotype for PCM. The results sug
- PublicationComposition of rabbit caecal microbiota and the effects of dietary quercetin supplementation and sex thereupon(Universitat Politècnica de València, 2019-12-23) North, M.; Dalle Zotte, A.; Hoffman, L.; National Research Foundation, South Africa[EN] The purpose of this study was to add to the current understanding of rabbit caecal microbiota. This involved describing its microbial composition and linking this to live performance parameters, as well as determining the effects of dietary quercetin (Qrc) supplementation (2 g/kg feed) and sex on the microbial population. The weight gain and feed conversion ratio of twelve New Zealand White rabbits was measured from 5 to 12 wk old, blood was sampled at 11 wk old for the determination of serum hormone levels, and the rabbits were slaughtered and caecal samples collected at 13 wk old. Ion 16STM metagenome sequencing was used to determine the microbiota profile. The dominance of Firmicutes (72.01±1.14% of mapped reads), Lachnospiraceae (23.94±1.01%) and Ruminococcaceae (19.71±1.07%) concurred with previous reports, but variation both between studies and individual rabbits was apparent beyond this. Significant correlations between microbial families and live performance parameters were fou