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Bioaccumulation of metals in sediment elutriates and their effects on growth, condition index, and metallothionein contents in oyster larvae ArchiMer
Geffard, A; Geffard, O; Amiard, J; His, Edouard; Amiard Triquet, C.
The bioavailability of Cd, Cu, Zn, and Pb from two metal-contaminated sediments (Bidassoa and Dunkerque) was studied using Crassostrea gigas larvae exposed to sediment elutriates. The metal contents within the sediments, the larvae and larval growth, the condition index, and the induction of metallothionein in the larvae were measured. The larval growth and condition index were only affected after exposure to the highest elutriates concentration (5 to 25%) from the most contaminated sediment (Dunkerque). Bioaccumulation of all metals was observed in larvae exposed to Dunkerque elutriatre; only Cu bioaccumulation was observed in the Bidassoa elutriate. The results from larvae exposed to both sediment elutriates show a strong correlation between...
Tipo: Text Palavras-chave: Metallothionein; Metal bioaccumulation; Larval growth; Crassostrea gigas larvae; Sediment elutriates.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-4748.pdf
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Polyploidy in the Manila clam Ruditapes philippinarum - 1 - Chemical induction and larval performances of triploids ArchiMer
Dufy, Christian; Diter, Alain.
An effective treatment using catochalasin B (1 mg CB/ml dimethylsulfoxyde in 1 litre of sea water) was developed to induce triploidy in the Manila clam Ruditapes philippinurum (Adams and Reeve). The percentage of induced triploidy was assessed by karyological examination of embryos and spat. The treatment was found to be optimal between 20 to 35 minutes post-insemination exposure to CB, at 25'C, and produced 75.8 ± 5.7% triploid embryos on the average over four experiments. Growth and survival of larvae to metamorphosis were recorded for two different rearings each split into two replicates. Both larval rearings showed similar survival up to settlement: 19.3 and 27.0%, on average over two replicates, in the treated batches relative to the controls. Mean...
Tipo: Text Palavras-chave: Larval survival; Larval growth; Bivalves; Cytochalasin B; Triploidy; Sruvie larvaire; Croissance larvaire; Bivalve; Cytochalasine B; Triploïdie.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/1990/publication-2752.pdf
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Rearing five species of Diptera (Calliphoridae) of forensic importance in Colombia in semicontrolled field conditions Pap. Avulsos de Zool. (São Paulo)
Vélez,María C.; Wolff,Marta.
The family Calliphoridae is widely known to lead the colonization of corpses and their development rates are frequently used to estimate the postmortem interval. This study presents the larval growth of five forensically important species of Calliphoridae in Colombia. Rearing took place in semicontrolled field conditions where the egg masses were collected. We show curves of larval growth, larval length and time intervals to reach all immature stages for Lucilia eximia and Cochliomyia macellaria at two sites with different climatic conditions and for Chrysomya albiceps, Chrysomya megacephala and Calliphora nigribasis at one site. Overall, high temperatures speeded up the development of the species reared at two different sites, whereas low temperatures for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lucilia eximia; Cochliomyia macellaria; Chrysomya spp.; Calliphora nigribasis; Larval growth.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492008000600001
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