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Caractérisation des sédiments des fonds de bassin des différentes fermes aquacoles de Nouvelle- Calédonie : Compilation des fiches techniques publiées de 1998 à 2000 ArchiMer
Lemonnier, Hugues.
En 1996, le vieillissement des fonds de bassins aquacoles de crevettes était présenté comme hypothèse explicative de la dégradation des rendements de production sur certains sites d’élevage. Un travail conséquent avait été réalisé à l’époque dont l'objectif était, à partir d'un inventaire des différents sédiments des fermes aquacoles du Territoire, de mettre en évidence une éventuelle évolution de ce sédiment au fil des cycles d'élevage et son influence sur la productivité. L’objet de ce document est de numériser et de compiler les différentes fiches techniques diffusées à l’époque sous forme papier aux aquaculteurs de la filière crevette de Nouvelle-Calédonie.
Tipo: Text Palavras-chave: Aquaculture; Litopenaeus stylirostris; Durabilité; Sédiment; Envasement; Matière organique; PH; Déchets.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00656/76762/77918.pdf
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Évolution des métaux lourds dans la sédimentation récente de la baie de Fort-de-France (Martinique) ArchiMer
Pujos, Michel; Pons, Jean-claude; Parra, Maria.
Mud progradation of eustatic and to a lesser extent of neotectonic origin began 2000 years ago in the bay of Fort-de-France (Martinique). The terrigenous muds originate from erosion of rocks and soils and cover essentially the inner part of the bay. Recent muds tend of the nineteenth century to the present) are characterized by a sharp enrichment in heavy metals. High concentrations of Ph, Zn and Cu result from a) the rapid development of sugar cane and distilleries about 1880, and b) industrial activities of Fort-de-France region (after the second world war).
Tipo: Text Palavras-chave: Envasement; Métaux lourds; Quaternaire terminal; Baie de Fort-de-France; Mud progradation; Heavy metals; Late Quaternary; Fort-de-France bay.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00323/43380/42828.pdf
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Impact des installations ostréicoles sur l’hydrodynamique et la dynamique sédimentaire ArchiMer
Kervella, Youen.
Oyster farm structures represent artificial obstacles which can disturb tidal currents and wave propagation, and thus modify sediment transport patterns. Local deposition may result from these modifications, in proportions that may threaten the oyster farming. The impact of structures on hydrodynamics, waves and currents, is investigated at different spatial scales by means of in-situ measurements, experimental tests and numerical modeling. These different approaches show that in the near-field, tidal currents are modified in terms of intensity and direction but there is no significant impact on the waves. On the other hand, at the scale of the oyster farm, a significant reduction of the current velocities and a large wave height attenuation are recorded....
Tipo: Text Palavras-chave: Tables à huîtres; Envasement; Courants; Vagues; Sédiments; Impact; Oyster tables; Silting up; Currents; Waves; Sediment; Impact.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00011/12262/9043.pdf
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