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	Provedor de dados Naturalis (2) Autor Geest, H.G. van der (2) Debrot, A.O. (1) Hunting, E.R. (1) Soest, R.W.M. van (1) Vos, A. (1) Palavra-chave 42.72 (1) 42.75 (1) Aquatic insect behaviour (1) Avoidance behaviour (1) Epibionts (1) Heterogeneity (1) Impedance conversion technique (1) Low oxygen (1) Mangroves (1) Spatial variations (1) Sponges (1) Tannins (1) Mais... Tipo do documento Article / Letter to the editor (2) Ano 2008 (1) 2007 (1) País Netherlands (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Behavioural responses of caddisfly larvae (Hydropsyche angustipennis) to hypoxia Naturalis Geest, H.G. van der. The availability of aquatic oxygen can limit habitat suitability for benthic insects, and differences in hypoxia tolerance can therefore play a role in explaining distributions in the field. This study describes a behavioural test in which the trade off between different survival strategies after exposure to different oxygen concentrations is analyzed, using the caddisfly Hydropsyche angustipennis as a model organism. The impedance conversion technique was used to quantify patterns of behaviour for individual caddisflies at three levels of dissolved oxygen (100%, 50%, and 30% saturation) under controlled laboratory conditions. Exposure to hypoxia resulted in behavioural changes: under low-oxygen conditions, larvae increased their ventilation rate, which... Tipo: Article / Letter to the editor Palavras-chave: Avoidance behaviour; Impedance conversion technique; Low oxygen; Aquatic insect behaviour; 42.75. Ano: 2007 URL: http://www.repository.naturalis.nl/record/262647 Diversity and spatial heterogeneity of mangrove associated sponges of Curaçao and Aruba Naturalis Hunting, E.R.; Soest, R.W.M. van; Geest, H.G. van der; Vos, A.; Debrot, A.O.. Sponges are major epibionts of mangrove roots in the Caribbean. Mangrove sponge communities in the Caribbean mainly consist of species that are typical to this habitat and community compositions often differ from those found on coral reefs nearby. Heterogeneity in species distributions between locations and within locations between roots is often reported. This study quantifies the diversity and abundance of mangrove associated sponges in the inner bays of Curaçao and Aruba and correlates variability of regional sponge diversity with environmental variables measured along the surveyed sites. Tannin concentrations vary between mangrove roots, and were correlated to sponge cover as a possible cause for habitat heterogeneity on a smaller scale. A total of 22... Tipo: Article / Letter to the editor Palavras-chave: Epibionts; Heterogeneity; Mangroves; Spatial variations; Sponges; Tannins; 42.72. Ano: 2008 URL: http://www.repository.naturalis.nl/record/291892 Registros recuperados: 2 Primeira ... 1 ... Última

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