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Rickettsia-like organism infecting juvenile sea-bass Dicentrarchus labrax ArchiMer
Comps, Michel; Raymond, J. C.; Plassiart, G. N..
High levels of mortalities (20%) associated with abnormal swimming have been observed in farmed juveniles of seabass, Dicentrarchus labrax, in Mediterranean coast, southern France. Histopathology was obvious in the brain with nervOUS tissue necrosis and the presence of ceUs containing basophilic granules corresponding to smaU coccoid organisms. Ultrastructural examination revealed these organisms were rickettsia-like organisms morphologicaUy close to Piscirickettsia salmonis
Tipo: Text Palavras-chave: Pathology; Dicentrarchus labrax; Sea Bass; Rickettsia like.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/1996/publication-6158.PDF
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Dynamique temporelle de la contribution du repeuplement en stades précoces de truite (Salmo Trutta l.) dans la population en place et dans la pêche sur le doubs franco-suisse. ArchiMer
Champigneulle, A.; Degiorgi, F.; Raymond, J. C.; Cachera, S..
The technique of otoliths fluoromarking has been used to evaluate at a large scale the practices of brown trout (Salmo trutta L.) stocking (540 000 - 570 000/year, most of them as sac fry) for three cohorts 1994-95-96 in a part of the River Doubs having a length of 40 km and fragmented in three zones (upstream, median, downstream) by three hydroelectric dams. For each of the three cohorts, there is a rather high contribution (23 to 60% according to the zone) of the stocked fry to the automnal 0+ standing population. The mass marking of all the stocked fry allowed to show that the dynamics of the contribution of the two components of recruitment (natural or stocked) differed. Indeed, the contribution of stocking decreased with time when measured in the...
Tipo: Text Palavras-chave: Salmo trutta; Repeuplement; Marquage; Otolithes; Pêche; Salmo trutta; Restocking; Marking; Otoliths; Angling.
Ano: 2002 URL: https://archimer.ifremer.fr/doc/00480/59141/61769.pdf
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