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Food deprivation reduces social interest in the European sea bass Dicentrarchus labrax ArchiMer
Aimon, Cassandre; Le Bayon, Nicolas; Le Floch, Stephane; Claireaux, Guy.
Periods of food deprivation up to several months are common features for fishes and in such conditions, fitness will be determined by their capacity to maximize food encounter while minimizing predation risk. In this context, the propensity to take risk and the willingness to associate with conspecifics are particularly important as they contribute to alleviating the trade-off between predation avoidance and foraging efficiency. This study examined to what extent food deprivation modulates fish risk-taking and social behaviours, as well as the relationship between them. To address these issues juvenile European sea bass were either fed daily with a maintenance ration or food-deprived during 3 weeks. Risk-taking and sociability were assessed through...
Tipo: Text Palavras-chave: Behaviour; Teleost fish; Exploratory activity; Sociability; Risk taking; Behavioural interaction.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00474/58552/62391.pdf
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Selection of native species from Caatinga (dry forest) to recovery of mesquite invaded areas PFB - Pesquisa Florestal Brasileira
Fabricante, Juliano Ricardo; Araújo, Kelianne Carolina Targino de; Castro, Raphaela Aguiar de; Souza, Bruna Sá Rodrigues de; Barros, Bianca Karolyne Reis de; Siqueira-Filho, José Alves de.
The aim of this study was to evaluate the sociability of indigenous species from Caatinga with exotic invasive Prosopis sp. (mesquite) to be used in recovery projects of invaded areas. Twenty plots of 100 m² were installed, where  all woody species presenting height ≥ 15.0 cm had the number of individuals recorded. To evaluate the association of native species with mesquite we used the association index. In order to study the correlation of Prosopis sp. with other taxa, we used Pearson coefficient and the categorization performance of native species was calculate by arithmetic mean of the rate of association sum and Pearson coefficient. We sampled 28 species associated with mesquite, 14 of which presented the inclusion criteria of presenting at least 5...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological Invasions; Sociability; Mesquite; Recovery of degraded areas; Dry forest Ecologia Vegetal; Invasão Biológica; Recuperação de Áreas Degradadas Invasão biológica; Sociabilidade; Prosopis; Recuperação de áreas degradadas; Savana Estépica.
Ano: 2015 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/876
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