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	Provedor de dados OceanDocs (1) ArchiMer (1) Autor Andrefouet, Serge (1) Gaertner-mazouni, Nabila (1) Le Moullac, Gilles (1) Levy, Peva (1) Madkour, H.A. (1) Menoud, Mathilde (1) Remoissenet, Georges (1) Van Wynsberge, Simon (1) Mais... Palavra-chave Giant clam (2) Bioaccumulation (1) Heavy metals (1) Histology (1) Marine bivalve (1) Red Sea Accumulation Chemical analysis Clam culture Absorption http://aims.fao.org/aos/agrovoc/c_27 (1) Reproduction (1) Spawn (1) Tatakoto atoll (1) Tridacna (1) Tridacna maxima (1) Mais... Tipo do documento Journal Contribution (1) Text (1) Ano 2016 (1) 2005 (1) País Belgium (1) France (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Distribution and relationships of heavy metals in the giant clam (Tridacna maxima) and associated sediments from different sites in the Egyptian Red Sea Coast OceanDocs Madkour, H.A.. The giant clam (Tridacna maxima) and sediments have been collected from clean and contaminated coastal sites of the Egyptian Red Sea. Selected samples of the giant clam shells and the associated surface sediments were analyzed for Fe, Mn, Zn, Cu, Pb, Ni and Cd. Significant spatial differences in metal concentrations in Tridacna maxima and sediments were identified. Copper and lead are greatly enriched in the giant clam shells, which is related to their physiological function. Cd content is higher in Tridacna maxima than in sediments, because of the easy substitution between Cd and Ca. The levels of most metals in the giant clam shells and sediments were higher in the anthropogenic sites than in the uncontaminated sites. Generally, metal variations reflect... Tipo: Journal Contribution Palavras-chave: Bioaccumulation; Heavy metals; Giant clam; Tridacna; Red Sea Accumulation Chemical analysis Clam culture Absorption http://aims.fao.org/aos/agrovoc/c_27. Ano: 2005 URL: http://hdl.handle.net/1834/1307 Identifying Robust Proxies of Gonad Maturation for the Protandrous Hermaphrodite Tridacna maxima (Röding, 1798, Bivalvia) from Individual to Population Scale ArchiMer Menoud, Mathilde; Van Wynsberge, Simon; Le Moullac, Gilles; Levy, Peva; Andrefouet, Serge; Remoissenet, Georges; Gaertner-mazouni, Nabila. Monitoring gonadmaturation for protandrous and functional hermaphrodite species such as the giant clamTridacna maxima is difficult due to the juxtaposition and relative proportion ofmale and female tissues in the gonad [gonadal sex ratio (GSR)]. Here, the relevance of the widely used gonadosomatic index (GSI) as proxy of giant clam gonad maturation is tested with a large dataset (n = 265). Gonadosomatic index is compared with other indices, namely the proportion of the male part harboring spermatozoids, the proportion of empty oocyte follicles, the mean oocyte diameter, and the oocyte elongation. At gonad scale, high index variability highlighted partial spawning. At individual scale, male and female maturation proxies were contrasted, showing either... Tipo: Text Palavras-chave: Giant clam; Marine bivalve; Reproduction; Spawn; Tatakoto atoll; Histology; Tridacna maxima. Ano: 2016 URL: http://archimer.ifremer.fr/doc/00333/44441/44111.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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