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| Laming, Sven; Hourdez, Stéphane; Cambon-bonavita, Marie-anne; Pradillon, Florence. |
| The chemosymbiotic gastropod Alviniconcha (Provannidae), first described in 1988, is one of the most emblematic hydrothermal-vent taxa described from the Central Indian Ridge and the Southwest (SW) Pacific. Symbiotic bacteria found in the gill of Alviniconcha are thought to be their principal source of nutrition. In the SW Pacific, species distributions for A. kojimai, A. boucheti – and to a lesser extent A. strummeri – overlap. While Alviniconcha species do not appear to truly co-exist in these highly energetic but spatially limited habitats, certain species regularly co-occur within a single vent field and in rare instances, the same edifice. Past research suggests that SW-Pacific Alviniconcha species might aggregate around fluids with distinct... |
| Tipo: Text |
Palavras-chave: Deep sea; Chemosymbiotic; Periostracum; Gastropod; Habitat partitioning; Computed tomography; Histology; Taxonomy; 3D model. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00628/74048/73459.pdf |
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| Comps, Marie-annick; Herbaut, Christian; Fougerouse, Angélique. |
| Whitish parasite-like bodies (PLBs), 0.5-2 mu m in size, were detected within the pearl bag of some grafted pearl oysters, Pinctada margaritifera, from Takapoto island (French Polynesia). Histological and ultrastructural investigations have revealed that these bodies consisted of lamellar organic material locally secreted by some epithelial cells of the pearl bag. The fine structure and the formation of these bodies are described. The causes of this abnormal secretion of organic mater, which actually corresponds to periostracum, are not presently known. No parasite nor infectious micro-organism was found associated with the PLBs. |
| Tipo: Text |
Palavras-chave: Periostracum; Pearl bag; Pinctada margaritifera. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/2000/publication-545.pdf |
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