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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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La cinématique de l'Atlantique Nord : la question de la déformation intraplaque ArchiMer
Fidalgo González, Luis.
The main features of geodynamic evolution in the North Atlantic and the lithospheric plates surrounding it have been known for a quarter of a century now. However, a number of questions raised by the first models published have still not been clearly answered in detail. Among them, the difficulty in adjusting the domain to the north and the south of the Faeroe-Iceland-Greenland ridge should be highlighted. This study addresses the issue by using fracture zones as the main data for our reconstructions. We show that they accurately bound the kinematical reconstructions. They also enable kinematical reorganisation periods to be studied on the scale of oceans, as well as their duration. Reconstructions carried out on these bases confirm the existence of...
Tipo: Text Palavras-chave: Europa; Africa; North Atlantic; Modelling; Fracture zone; Magnetic anomaly; Ocean crust; Deformation; Plate tectonic; Europe; Afrique; Atlantique Nord; Modélisation; Zone Fracture; Ouverture; Anomalie Magnétique; Croute Oceanique; Déformation; Tectonique Plaque.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/these-1205.pdf
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