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Age determination of eels in the French Mediterranean lagoons using classical methods and an image analysis system IRD
Panfili, Jacques; Ximénès, M.C.; Do Chi, T..
Several methods are used for age determination of eels in the French mediterranean lagoons (observation of the whole otolith after clearing, grinding and polishing, dyeing, SEM and image analysis). Two types of otoliths are observed depending on the width of the growth rings which is probably related to the environmental conditions. Furthermore, the growth checks are located nearby or inside the opaque rings. A computer assisted method is developed, with reference to the other methods, with the aim of improving the efficiency of collecting and processing age and growth data. With further developments and increasing knowledge of life-history of elvers and juvenile eels, it seems possible to use an image analysis system for ageing eels in lagoons....
Tipo: Text Palavras-chave: POISSON; LAGUNE; AGE PHYSIOLOGIQUE; ESTIMATION; OTOLITHE; ANALYSE D'IMAGE; ANGUILLE.
Ano: 1990 URL: http://www.documentation.ird.fr/hor/fdi:41659
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Causes and effects of terrestrial runoff and riverine outflow on brackish/coastal marine fisheries ecosystems in the northern mediterranean region IRD
Crivelli, A.J.; Ximenes, M.C.; Gout, B.; Lasserre, G.; Fréon, Pierre; Do Chi, T..
Tipo: Text Palavras-chave: ECOSYSTEME; ZONE COTIERE; BIOTOPE; POISSON MARIN; ESTUAIRE; EAU DOUCE; CAPTURE; POLLUTION.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:010008046
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Ecologie et dynamique des populations de crevettes palaemonetes varians dans un écosystème lagunaire (domaine de Certes, Arcachon, France) ArchiMer
Beaudelin, P.; Charles-dominique, E.; Do Chi, T..
The fish reserves in the Arcachon basin are a semi-natural lagoon com­plex which are suitable for the analysis of various population dynamics problems. We will consider here the population of the shrimp Palacmonetea varians, an impor­tant link in the food chain between primary production, the production of meiofau­na and that of exploitable species, e. g. bass, eel. Estimations of biomass and abundance are extremely important when one studies the quantitative production of macrofauna in a lagoon system. The methodology utilized (net traps, tagging methods and stock assessment by simple or multiple capture and recapture techniques) is particulary suited to the conditions of the milieu. Our results confirm the im­portant role played by shrimp in the...
Tipo: Text
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41683/40892.pdf
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