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Copyright of Revista Estudiantil AGRO - VET is the property of Universidad Mayor de San Andres, Facultad de Agronomia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Estudiantil AGRO - VET is the property of Universidad Mayor de San Andres, Facultad de Agronomia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista CienciaUAT is the property of Universidad Autonoma de Tamaulipas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Toy rabbits are selected for their paedomorphic ('babyish') appearance. The main objective of this study is to analyse the skull asymmetries of toy rabbits. For this purpose, a total of 46 adult skulls (9 males and 37 females) were studied. Geometric morphometric technique with five pairs of anatomical landmarks and three on sagittal plane on dorsal aspect of skull was used. Our hypothesis is that through artificial selection on males (which are the main subject for obtaining new phenotypes among toys) asymmetries will be expressed as higher asymmetrical values. Skulls' size was similar between sexes, but males presented a higher level of fluctuating asymmetry. Fluctuating asymmetry indicates a negative ability to buffer subtle developmental anomalies, normally from genetic or environmental origin. In other words, males would be under stronger directed selection and consequently be more affected by management (including selective) factors compared to females. These results can allow a better understanding of the patterns and processes underlying sexual shape dimorphism, especially with extreme phenotypes, as toy rabbits are. [ABSTRACT FROM AUTHOR]

Tannins are secondary metabolites produced by guanacaste tree fruit that can form complexes with other macromolecules and increase the preservation of animal skins after the tanning process. This work focused on the extraction and quantification of vegetable tannins in guanacaste tree fruit (Enterolobium cyclocarpum) for its potential application as a tanning agent for European rabbit skin (Oryctolagus cuniculus). Extractions were performed using 70% aqueous ethanol, methanol and acetone solutions and then quantified by a modified Folin Ciocalteu method using tannic acid as the standard. Finally, the tanning capacity in rabbit skin was evaluated by the physical properties of the leather. It was found that the highest concentration of tannic acid equivalents (TAE) was obtained for extraction with 70% ethanol (1,42 g TAE / L) and 70% acetone (1,49 g TAE/L), respectively. These extracts were used to obtain the leathers according to standards for these products, passing only 3 out of 5 stability and resistance tests under official standards. These extracts are a potential substitute for chromium salts, allowing tanning processes with less environmental impact. [ABSTRACT FROM AUTHOR]

Lagomorphs and histricomorphs, as guinea pigs and chinchillas, have common dental characteristics, such as the elodont and hypsodont teeth. These peculiarities predispose to the presentation of malocclusion due to the consumption of inadequate, non-abrasive diets. The purpose of this work is to identify the prevalence of malocclusion in each case. In addition, it aims to make an objective evaluation of the radiological studies of the specimens, based on anatomical reference lines, to determine the main radiographic findings according to the degree of malocclusion clinically diagnosed. 30% of the individuals evaluated presented malocclusion problems being 42.86% rabbits, 16.6% guinea pigs and 23% chinchillas. There is no evidence of significant differences in the presentation by sex. In rabbits, the diagnosis of the specimens from the group I and II were more common, while in guinea pigs they were II and III. Grade I and II were the most diagnosed in rabbits and guinea pigs. In the radiographs, the most common lesions are the overgrowth of the maxillary and mandibular roots, elongation of the incisors, loss of the occlusal surface and deformation of the mandibular roots. A method of correction for LL radiographic projections with evident rotation is proposed to maintain the objectivity of the radiographic evaluation. [ABSTRACT FROM AUTHOR]

The European rabbit (Oryctolagus cuniculus) is a key species of great ecological and economical interest in the Mediterranean ecosystem. During the last decades important changes in the land use have transformed part of its natural habitat, a problem that has been aggravated by the incidence of two viral diseases, myxomatosis and hemorrhagic disease (RHD) causing a major decline in the populations of Mallorca. The conservation of the species has been based on certain occasions in the realization of repopulations. This paper shows the results of a study initiated in Mallorca whose ultimate purpose is to minimize the risks associated with this management measure, and establish the methodological basis for a correct recovery of the species. Therefore, a sampling of the rabbit populations susceptible of being donors has been carried out, analyzing their genetic and sanitary characteristics, at the same time that a survey of the situation of the wild rabbit populations of Mallorca has been carried out. In this way, the hunting administration of Mallorca has developed during the years 2016 and 2019 the field rabbit experimental breeding from six donor populations in controlled conditions of semi-freedom in the Center Cinegètic de Mallorca. The rabbits obtained have served to repopulate areas in which rabbit density was low or zero. The losses caused by the new variant of the RHD (virus RHDV-2) in the breeding nuclei, and the predation in the areas of repopulation, have been the most important causes of mortality. Subsequently, lower mortality rates have been observed, suggesting a greater natural immune response capacity to the RHD, and the following repopulations carried out on the island until now have shown high rates of survival and adaptation of the specimens. [ABSTRACT FROM AUTHOR]

Copyright of Revista CienciaUAT is the property of Universidad Autonoma de Tamaulipas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Rabbit meat is a viable option to meet the qualitative and nutritional demands of the current consumers, due to its easy digestion, high protein content and unsaturated fatty acids, low-fat concentration. Despite its nutritional characteristics, this meat is not widely accepted in Mexico, so it is necessary to develop products that favor its acceptance. In the present study, two experiments were carried out using sensory tests to evaluate the acceptance of a sausage type made from rabbit meat. Experiment one consisted of a sensorial test of the sausage with 24 hours of rest after its elaboration, through a hedonic scale with values from 1 to 10 where 1 corresponded to the lowest score and 10 to the highest. Experiment two was developed by a sensorial test for a sausage ripened at 48, 120, 216 and 312 hours, with the hedonic scale established for experiment one. The evaluated aspects of the product were: color, smell, flavor, texture and overall, the results were analyzed by means of descriptive statistics and analysis of variance. In conclusion, the sausage was accepted by the participants in both experiments. In experiment two, the highest level of acceptance corresponded to 216 hours of maturation (P <0.05). [ABSTRACT FROM AUTHOR]

Introduced mammals in Neuquen province: status and management priorities. Patagonia houses 84 species of native mammals and numerous exotic species. In this study we reviewed the quantity and identity of mammalian species introduced in Neuquén province (NW Patagonia, Argentina) and their present status. We also updated the area invaded by Cervus elaphus, Neovison vison, Oryctolagus cuniculus and Sus scrofa in the Neuquén province. We gathered information from: (1) publications and reports, (2) consultation with park rangers, professionals, technicians, (3) unpublished data of the authors, and (4) fieldwork. We recorded the introduction of 29 species of mammals (62% are Artiodactyla), seven of which are already extinct, six are restricted to hunting ranches, and 13 have established wild populations. The four analysed species show an increase in the invaded area during the last decade and already occupy most of the central and southern regions of the province. The largest invaded area corresponds to O. cuniculus, followed by S. scrofa and C. elaphus with similar areas, and finally N. vison. We promote an initiative for a management plan in NW Neuquén aiming to introeradicate isolated populations and restrain the spread of exotic species into provincial protected areas. In SW Neuquén, we promote a coordinated management plan between national (National Parks Administrations) and provincial (Provincial Wildlife Agencies) jurisdictions focused in the region of the National Parks Lanín and Nahuel Huapi. The largest challenge now is to integrate ecological and technical perspectives with socioeconomic considerations and the diverse perceptions of the different social groups regarding each invasion process. [ABSTRACT FROM AUTHOR]

The effect of cryopreservation on the viability and the acrosomal state of spermatozoa of New Zeeland rabbits (Oryctolagus cuniculus) was studied. Forty six ejaculates, obtained with an artificial vagina, were used to determine the percentages of viability and mortality with and without acrosomal reaction (VsRA, VcRA, MsRA and McRA, respectively) in fresh and post-thawed semen by staining with fluorescein isothiocianato conjugated with lectine from Arachis Hypogaea and propidium iodide (FITC-PNA/IP). The values obtained in fresh semen were 73.6±4.9%, 5.5±2.4%, 15.2±3.7% and 5.6±2.3%, respectively, and 40.0±4.8%, 10.4±3.1%, 38.1±6.1 y 11.5±3.6, respectively, in post-thawed semen. Statistically significant differences (p<0.05) were determined between the spermatic characteristics in fresh and post-thawed semen, which were caused by the effects of cryopreservation. It is concluded that, even when the viability and the acrosomal state of the spermatozoa are affected by cryopreservation, a sufficient quantity of spermatozoa remains alive and without acrosomal reaction capable to fulfill the fertilization. [ABSTRACT FROM AUTHOR]

The objective of this work is to compile the main characteristics of digestion in rabbits, focusing on the digestion of fiber and protein diet to assess the potential performance of plant materials such as the mulberry. The fiber selective system of this lagomorph allows for specialized feeding and efficient excretion of low quality materials. The composition and high digestibility of mulberry make it very promising for introduction into diets of rabbits, requiring its evaluation at various levels of inclusion, which permit the definition of sustainability margins to improve their use in rabbits. Experiences that include this fodder in diets for rabbits are presented. [ABSTRACT FROM AUTHOR]