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Trophic relationships gonad-intestinal loop in Pecten maximus . ArchiMer
Lepennec, M; Dorange, G; Beninger, P; Donval, A; Widowati, I.
Histological, histochemical and ultrastructural studies were performed on the region of the gonad traversed by the intestine in Pecten maximus . The results indicate a digestive and absorptive function of intestine epithelial cells and a transfer of metabolites to the surrounding gonad tissue. Several possible mechanisms of translocation are presented, including diffusion into the haemolymph and transfer via vacuolated cells of the gonad interstitial connective tissue.
Tipo: Text Palavras-chave: Pecten maximus; Bivalvia; Histology; Haemolymph; Histochemistry; Cells; Metabolites; Epithelia; Intestines; Ultrastructure; Animal reproductive organs.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/acte-1668.pdf
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Localisation immunohisto chimique de peptides apparentes aux hormones de vertebres chez Pecten maximus ArchiMer
Donval, A.
Substances related to vertebrate peptidic hormones have been searched by immunohistochemical methods in Pecten maximus . Neurosecretory cells have been detected in the nervous ganglia with antisera raised against vertebrate hormones, gastrin/CCK like, glucagon like, insuline like, somatostatine like. Other gastro-intestinal hormones like are localized in some cells of the gut epithelium: bombesine and vasoactive intestinal peptide.
Tipo: Text Palavras-chave: Pecten maximus; Bivalvia; Immunology; Histochemistry; Cells; Neurosecretory system; Juveniles; Hormones.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/acte-1724.pdf
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La crépidule : identifier les mécanismes de sa prolifération et caractériser ses effets sur le milieu pour envisager sa gestion (Chantier : Rade de Brest) ArchiMer
Thouzeau, G; Chauvaud, L; Clavier, J; Donval, A; Guerin, L; Jean, F; Le Hir, M; Lorrain, A; Marc, R; Paulet, Y-m; Raffin, C; Richard, J; Richard, M.
En 1999, le risque écologique encouru par les écosystèmes côtiers soumis à la prolifération de la crépidule, Crepidula fornicata, a été pleinement reconnu par la communauté scientifique nationale et internationale. Au niveau national, le Programme National Environnement Côtier (PNEC) et le programme national LITEAU ont tous deux identifié des actions thématiques prioritaires sur la dynamique de prolifération de la crépidule et les interactions crépidule/bivalves exploités. Les actions du LEMAR (UMR 6539 CNRS) sur cette thématique s’inscrivent dans deux projets : 1 - La crépidule : identifier les mécanismes de sa prolifération et caractériser ses effets sur le milieu pour envisager sa gestion. » (LITEAU) 2 - Recrutement, milieu physique et interactions...
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Ano: 2002 URL: http://archimer.ifremer.fr/doc/00032/14292/11570.pdf
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