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Biologie et pêche traditionnelle des crevettes pénéides dans l'embouchure d'un fleuve en milieur semi-aride (sud-ouest de Madagascar) ArchiMer
Laroche, Jean; Benoely,; Siaviri, A.
Traditional fishing using beach seines was studied over a period of one year at the mouth of the Onilahy river. The catches/efforts were recorded on a daily basis, biological sampling and the measurement of hydrological parameters being carried out twice a month. The moderate variations of salinity and temperature (14 < salinity < 35; 25 degrees C < temperature < 30 degrees C) which were observed in the estuary can be explained by the semiarid climate of the area. Four species of penaeid shrimps are to be found on the Onilahy: Metapenaeus monoceros, Panaeus indicus, Penaeus monodon and Penaeus japonicus, which were mainly caught at the subadult/adult stage with a Carapace length between 10 and 50 mm. The presence of these important sizes at the...
Tipo: Text Palavras-chave: Pêche; Estuaire; Dynamique population; Croissance; Taille corporelle; Cycle évolutif; Zone semi aride; Madagascar; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Metapenaeus monoceros; Rivière Onilahy; Afrique; Milieu saumâtre; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata; Fishing; Estuaries; Population dynamics; Growth; Body size; Life history; Semi arid zone; Malagasy Republic; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Africa; Brackish water environment; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00097/20828/42822.pdf
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Minéralisation de la matière organique et échanges ioniques à l'interface eau-sédiment de l'étang de Berre, Méditerranée ArchiMer
Delmas, Daniel.
The étang de Berre, near Marseilles (France), is an inland brackish basin with a high primary rate of production. In 1966, the diversion of the Durance River introduced important hydrological changes. A study of organic matter mineralization and ionie exchanges at the water-sediment interface has made it possible to distinguish two areas, according to the composition of organic matter, mineralization mechanism and ionie transfers. In the North, the high rate of mineral sedimentation leads to a low content of organic matter in the sediment. This organic matter of detrital origin is little affected by mineralization; there is, however, high production of ammonium nitrogen, which is released to overlying waters. Nitrates and nitrites undergo denitrification...
Tipo: Text Palavras-chave: Interface eau-sédiment; Matière organique; Eau interstitielle; Minèralisation; Milieu saumâtre; Water-sediment interface; Organic matter; Lnterstitial water; Mineralization; Brackish basin.
Ano: 1980 URL: http://archimer.ifremer.fr/doc/00122/23317/21142.pdf
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