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Featured researches published by J.M. Castel.


Small Ruminant Research | 2003

Characterization of semi-extensive goat production systems in southern Spain

J.M. Castel; Y. Mena; Manuel Delgado-Pertíñez; J. Camúñez; J Basulto; F. P. Caravaca; J.L. Guzmán-Guerrero; M.J. Alcalde

This study attempts to describe the semi-extensive goat farming sector in Andalusia (south of Spain) and to establish characteristics. Eighty-nine goat farmers were surveyed in three areas of this region. The survey examined all aspects of the systems, from socio-economy to management. A multivariate analysis (multiple correspondence and cluster) was used to determine the different farm characteristics. Most of the goat farms studied are single-worker or family managed. The farmers lack training and are elderly, so that continuity of the activity is not assured, although newcomers are usually young. All the farms have some area in ownership, although the farms most specialized in dairy goat products are the smallest in both ownership and total area. The roads are generally in good condition, except on farms with little land, situated in areas of the sierra. Machine-milking installations, closely related to the presence of infrastructures and of goats with a dairy tendency, are generally lacking, (this aspect is improving day by day). Artificial nursing is less generalized than machine-milking. Farms specializing in milk production, whose main activity is dairy goat farming, have dairy specialized breed or crossbred (milk and meat) goats. Feeding depends largely on grazing, with little area being cultivated to produce feed for the goats. Little distinction is made for the production level. Olive or acorn tree branches ( Quercus ilex spp.) are used as feedstuff, depending on the types of tree predominating in the area. Five farm types were established, the differences depending on 14 variables of socio-economic aspects, level of production, infrastructure and installations, and feeding. Generated information from this study entails an advance into knowledge of goat farming systems in the Mediterranean area (where little information is generated). The relevance of this study is important since Andalusia has 40% of goats in Spain that produce more than half of the total goat milk in the country, which points out the socio-economical importance for most depressed areas in the region. This work supposes previous steps for improving the semi-extensive goat farming sector. From a methodological point of view, the discussion on variable types and utility establishes farm type characteristics.


Small Ruminant Research | 2003

Effect of hygiene-sanitary management on goat milk quality in semi-extensive systems in Spain

Manuel Delgado-Pertíñez; M.J. Alcalde; J.L. Guzmán-Guerrero; J.M. Castel; Y. Mena; F. P. Caravaca

Abstract Milk samples were collected from 28 farms, at monthly intervals during the production period (December to September). At the same time, each farmer was surveyed about specific conditions of hygiene-sanitary management at the farm. When management improvements were made, there was improvement (P


Animal | 2012

Evaluating mountain goat dairy systems for conversion to the organic model, using a multicriteria method.

Y. Mena; J. Nahed; F.A. Ruiz; Sánchez-Muñoz Jb; J. Ruiz-Rojas; J.M. Castel

Organic farming conserves natural resources, promotes biodiversity, guarantees animal welfare and obtains healthy products from raw materials through natural processes. In order to evaluate possibilities of increasing organic animal production, this study proposes a farm-scale multicriteria method for assessing the conversion of dairy goat systems to the organic model. In addition, a case study in the Northern Sierra of Seville, southern Spain, is analysed. A consensus of expert opinions and a field survey are used to validate a list of potential indicators and issues for assessing the conversion, which consider not only the European Community regulations for organic livestock farming, but also agroecological principles. As a result, the method includes 56 variables integrated in nine indicators: Nutritional management, Sustainable pasture management, Soil fertility and contamination, Weed and pest control, Disease prevention, Breeds and reproduction, Animal welfare, Food safety and Marketing and management. The nine indicators are finally integrated in a global index named OLPI (Organic Livestock Proximity Index). Application of the method to a case study with 24 goat farms reveals an OLPI value of 46.5% for dairy goat farms located in mountain areas of southern Spain. The aspects that differ most from the agroecological model include soil management, animal nutrition and product marketing. Results of the case study indicate that the proposed method is easy to implement and is useful for quantifying the approximation of conventional farms to an organic model.


Science of The Total Environment | 2016

Characterization and typification of small ruminant farms providing fuelbreak grazing services for wildfire prevention in Andalusia (Spain)

Y. Mena; J. Ruiz-Mirazo; F.A. Ruiz; J.M. Castel

Several wildfire prevention programs in Spain are using grazing livestock to maintain fuelbreaks with low levels of biomass. Even though shepherds are remunerated for these services, many of their farms are hardly viable in the current socio-economic context. By analyzing 54 small ruminant farms participating in the Grazed Fuelbreak Network in Andalusia (southern Spain), this research aimed to identify the main types and characteristics of such farms and, considering the challenges they are facing, propose strategies to improve both their economic viability and their effectiveness in fuelbreak grazing. Based on data collected through a survey on key farm management aspects, a multivariate analysis was performed and four main types of farm were identified: two clusters of dairy goat farms and two composed mostly of meat-purpose sheep farms. Farms in all clusters could benefit from improvements in the feeding and reproductive management of livestock, either to enhance their productivity or to make better use of the pasture resources available. Dairy goat farms remain more dependent on external animal feed to ensure a better lactation, therefore they should either diminish their workforce costs per animal or sell transformed products directly to consumers to improve their economic viability. Best fuelbreak grazing results were related to larger flocks combining sheep and goats, lower ratios of fuelbreak surface area per animal, and longer (year-long) grazing periods on fuelbreaks. Therefore, such farm features and adjusted fuelbreak assignments should be favored in wildfire prevention programs using grazing services.


Revista Científica de Produção Animal | 2013

Appraisal and Monitoring of Small-Scale Dairy Goat Production System

Y. Mena; F.A. Ruiz; R. Gutiérrez; J.M. Castel

In Spain there is a great variety of goat production systems, from the most traditional mixed (milk/meat) types to the most technologically advanced milk ones. To improve efficiency in these farms, small-scale appraisal and monitoring should be used. Because goat farmers are not used to record information, monitoring and data collection should be carried out monthly. Up to now, data collection included the use of land and labor, productivity, reproductive and feeding management, incomes and expenditures. Computerized management programs are recommended to analyze data. Indicators are used for various objectives as to compare results with established objectives, to compare a production system in different places or conditions or to analyze possible trends of production systems. Although technicians and researchers have mostly used monitoring data for technical and economic advice, aspects concerning environmental and social issues of livestock, should also be taking into account. For that, it is important to use methodologies and programs that facilitate joint analysis of the three (economical, environmental and sociological) sustainability areas. To improve the Spanish goat sector, it is absolutely essential that the producer, technicians, politics and researchers work together in the development of an adequate system of advisory. DOI:10.15528/2176-4158/rcpa.v15n2p179-188


Livestock Science | 2006

Appraisal of the sustainability of dairy goat systems in Southern Spain according to their degree of intensification

J. Nahed; J.M. Castel; Y. Mena; F. P. Caravaca


Small Ruminant Research | 2008

Application of the technico-economic analysis for characterizing, making diagnoses and improving pastoral dairy goat systems in Andalusia (Spain)

F.A. Ruiz; J.M. Castel; Y. Mena; J. Camúñez; P. González-Redondo


Small Ruminant Research | 2010

Present situation and future perspectives for goat production systems in Spain

J.M. Castel; F.A. Ruiz; Y. Mena; M. Sánchez-Rodríguez


Small Ruminant Research | 2009

Dairy goat grazing systems in Mediterranean regions: A comparative analysis in Spain, France and Italy

F.A. Ruiz; Y. Mena; J.M. Castel; C. Guinamard; N. Bossis; E. Caramelle-Holtz; M. Contu; M. Sitzia; N. Fois


Small Ruminant Research | 2011

Changes occurring in dairy goat production systems in less favoured areas of Spain

J.M. Castel; Y. Mena; F.A. Ruiz; J. Camúñez-Ruiz; M. Sánchez-Rodríguez

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Y. Mena

University of Seville

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Dariusz Gozdowski

Warsaw University of Life Sciences

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J Basulto

University of Seville

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