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Djerdali S.,Ferhat Abbas University Setif | Guerrero-Casado J.,University of Cordoba, Spain | Tortosa F.S.,University of Cordoba, Spain | Tortosa F.S.,Escuela Superior Politecnica Agropecuaria de Manabi
Bird Study | Year: 2016

Capsule Accessing extra food from waste dumps increases egg volume and hatching mass in White Storks. Aim To test how White Storks vary their investment in egg size, especially in last laid eggs, in relation to food availability, and to improve our understanding of the importance of extra feeding on intra-clutch variation. Methods The study was carried out in three White Stork breeding colonies in northern Algeria. Breeding performance was recorded in 70 nests over three years. White Stork colonies situated close to chicken farms were considered to be part of a ‘pseudo experiment’ where parents had access to extra food. Egg volume, laying order, hatching order and hatching weight were recorded. Results Egg volume and hatching mass in White Storks was significantly greater when they had access to extra food. The reproductive value of last laid eggs (fourth and fifth) doubled when females had access to extra food. Conclusion Laying smaller last eggs within a clutch provides a mechanism to facilitate early brood reduction in the White Stork, and so should be advantageous when food is scarce. On the contrary, when females had access to extra food, last laid eggs were as big as first eggs which suggests egg size variation is adaptable to local conditions. © 2016 British Trust for Ornithology Source

Giordano E.,Escuela Superior Politecnica Agropecuaria de Manabi
Rivista Geografica Italiana | Year: 2016

The development of peri-urbanization in Galápagos: the case of Santa Cruz island. - Historically the Galápagos archipelago has been identified as an exemplary case of a tourism development able to preserve the environmental heritage and as an example of an eco-tourism system of excellence. However, over the last decade, population growth and the motorization of the insular mobility have fundamentally changed the traditional process of settlement of the population and therefore the internal equilibrium of the system. Through the study of the main island of the archipelago, Santa Cruz, in the article we discuss the reasons beyond this change, noting how for the first time in his history the island is undergoing a rapid process of peri-urbanisation that puts at risk the tangible and intangible heritage of the island. Source

Alvaro Canadas L.,Instituto Nacional Of Investigaciones Nacionales | Carlos Molina H.,Instituto Nacional Of Investigaciones Nacionales | Diana Rade L.,Escuela Superior Politecnica Agropecuaria de Manabi | Francisco Fernandez M.,Campus Polytechnic Calceta
Revista MVZ Cordoba | Year: 2016

Objective. To assess the interaction effect of the season and planting densities on the production of eight INIAP corn hybrids. Materials and methods. A research process was conducted in 2013. It was applied a split - split plot design with three replication and Tukey test was used. It was evaluated two planting seasons (28 January and 8 April), they were placed in large plots. Two planting densities (65,500 y 125,000 plants/ha), that were located in the subplots and eight INIAP corn hybrids arranged in the sub- subplots. The evaluated variables were Fresh Matter, Dry Matter, Plant Height and Crude Protein Results. Fresh Matter and Crude Protein productions were influenced by planting seasons. Plant densities affected the production of Fresh Matter, Dry Matter and Plant Height, as well as the interaction season by corn INIAP hybrids. While INIAP corn hybrids showed statistical differences in the production of Fresh, Dry Matter, Plant Height and Crude Protein. The eight INIAP hybrids productions were: Fresh Matter (58.86 ton/ha ±5.19); Dry Matter (21.45 ton/ha ±4.71); Plant Height (2.46 m ±0.16) and Crude Protein (10.6±1.12). Conclusions. The performance showed by hybrids INIAP CML-172, INIAP 6021 and INIAP 551 were very acceptable forage material and could be used for silage purposes. Source

Carpio A.J.,University of Cordoba, Spain | Carpio A.J.,CSIC - Institute for Sustainable Agriculture | Oteros J.,University of Cordoba, Spain | Oteros J.,TU Munich | And 3 more authors.
Acta Oecologica | Year: 2016

The intensification of agriculture has significant environmental consequences. This intensification entails the simplification and homogenisation of the landscape, which leads to strong negative impacts at ecosystem level, including declines in animal biodiversity. The purpose of this study was to assess the effect of different land uses on reptilian and amphibian biodiversity patterns at a regional scale by analysing a large database on the presence of amphibians and reptiles in Andalusia (southern Spain). GIS techniques and the Ecological-Niche Factor Analysis (ENFA) were applied in order to assess whether the habitat was suitable for each reptilian and amphibian species, when the land use variables were excluded. The incongruence between the potential and the observed species richness was then correlated with the main types of land use in Andalusia. Our results showed that irrigated and unirrigated olive groves were associated with a biodiversity deficit of amphibians and reptiles respectively, whereas natural forests and pastures, along with more heterogeneous crops areas, were more suitable. A clustering analysis showed that generalist species were related to olive groves whereas rare and specialist species were related to land uses related to natural vegetation. In summary, our results indicate that large areas covered by olives groves harbour less amphibian and reptilian diversity, thus suggesting that agro-environmental schemes should be carried to promote the species richness in these crops. © 2015 Elsevier Masson SAS. Source

Vera-Montenegro L.,Escuela Superior Politecnica Agropecuaria de Manabi | Baviera-Puig A.,Polytechnic University of Valencia | Garcia-Alvarez-Coque J.-M.,Polytechnic University of Valencia
International Food and Agribusiness Management Review | Year: 2014

Ecuador supplies 70% of the world's fine aroma cocoa (Theobroma cacao). This paper defines a model of post-harvest technology selection, adapted to small producers, using two multi-criteria models that evaluate the quality, processing cost, and technology adoption capability of each technology. To achieve this result, a preliminary assessment of nine post-harvest technologies is performed, considering only the quality criteria. We then apply the analytical hierarchy process and fuzzy logic methodologies considering the other criteria (processing cost and technology adoption capability). The models provide alternative methods to achieve solutions that reflect the reality of small cocoa producers' decision-making processes. © 2014 International Food and Agribusiness Management Association (IFAMA). Source

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