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| Joachim-Bravo,Iara Sordi; Silva-Neto,Alberto Moreira da. |
| The influence of four host fruits, orange (Citrus sinensis L.), papaya (Carica papaya L.), mango (Mangifera indica L.) and apple (Malus domestica Borkh) on oviposition behavior of Ceratitis capitata (Wiedemann, 1824) was evaluated. Experiments were carried out on two C. capitata laboratory-reared populations: one with artificial diet for 10 years with periodic introduction of wild flies and other reared with artificial diet for 20 years without wild flies introduction. In acceptance experiments two pieces of a single fruit type were exposed to a group of 10 females; after 48 hours, these were changed by two new pieces of the same fruit type, and, in the end of the fourth day, the experiments were concluded. In preference experiments, two pieces of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fruitflies; Oviposition; Hierarchy; Preference. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000200009 |
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| Rineau, V.; Grand, A.; Zaragüeta, R.; Laurin, M.. |
| Phenotypic characters are essential to study the evolution of extant and extinct life forms and to reconstruct the tree of life. Inside the cladistics theory, parsimony is used by a large majority of systematists working on phenotypic characters, whereas 3ta is much less widespread but has triggered important debates. Many important differences in the interpretation of the cladistic theory exist between these methods, e.g. meaning and treatment of reversals, character representation as ‘data-matrices’ in parsimony (ordered and unordered), and as rooted trees (hierarchies) in 3ta. Although 3ta has received severe criticism, mostly focused in the use of software intended to be used in parsimony, only a few empirical studies have compared these methods so... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Branch length; Evolutionary model; Hierarchy; Ordered characters; Outgroup polarization; Parsimony; Reversals; Three-taxon analysis; Three-taxon statements; Unordered characters; 42.10. |
| Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/560429 |
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| Valentinov, Vladislav. |
| This article uses the farm problem theory as the framework for a comparative analysis of cooperative, market and hierarchical organization in the agrifood system. In order to carry out this analysis, the article proposes the organizational economics approach to the farm problem which supplements the traditional approaches explaining it in terms of low opportunity costs and high mobility costs of factors employed in agriculture. According to the proposed organizational economics approach, the farm problem is the outcome of inappropriateness of hierarchical and market organization for effective coordination of agricultural activities. The central argument of the article is that agricultural cooperatives are important because they partially perform the... |
| Tipo: Journal Article |
Palavras-chave: Cooperative; Market; Hierarchy; Farm problem; Structural change; Agribusiness. |
| Ano: 2005 |
URL: http://purl.umn.edu/45107 |
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| Resende,Daniela Chaves. |
| Residence advantage in heterospecific territorial disputes of Erythrodiplax Brauer species (Odonata, Libellulidae). Territories are the outcome of interactions determining where and how long individuals settle. To odonate species, aggressive disputes are not so common since the outcome can be predetermined by advantages such as residency, age, and body size. However, it is possible to predict that at heterospecific disputes, larger body-sized or more aggressive species have some profits overcoming these individual advantages, generating patterns of species hierarchy. Here, I studied the aggressiveness of five Erythrodiplax species (Odonata, Libellulidae) during territorial disputes and verified if larger body-sized species are more aggressive than smaller... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Asymmetry; Hierarchy; Interspecific competition; Territoriality. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262010000100014 |
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