Recent Submissions

  • Statistiques de la pêche collective en Lagune Ebrié (1978-1979)

    Ecoutin, J.M.; Bert, A. (1981-04)
    A first treatment of the statistical data of 1978 and 1979 on the collective fishing showed a decrease of total catches in the Ebrié Lagoon. The same diminution was found in the amount of smoked-fish collected in two different places of the lagoon. This fall is due to a smaller effort in the lagoon of the purse-seines in the Abidjan area and a decrease of the catches per unit of effort.
  • Compte rendu de la campagne Echobal I n/o Capricorne du 18 âout 1980 au 24 âout 1980

    Caverivière, A. (1981-04)
    This paper related an echosounding survey located off Côte d'Ivoire in cold season 1980. Biomass mean for the continental platform (20-125m) was 15 metric tons for one square mile.
  • Campagnes Nizery: Togo 5 (01 to 03/03/84) and Togo 6 (26 to 28/03/84). Resultats des chalutages

    Lhomme, F. (1984-04)
    This publication gives the results of the bottom trawlings made during the cruises Togo 5 and Togo 6 by the oceanographic research vessel "Andre Nizery" on the continental shelf of Togo during the estimation program of halieutic resources. The report includes: 1 - the report of the cruises Togo 5 and Togo 6; 2 - Some information on the presentation of the results; 3 - the trawl recording maps for the 2 cruises; 4 - The length frequency distributions of the measured samples.
  • Statistiques de peche des chalutiers ivoiriens - annee 1983

    Lhomme, F. (1984-04)
    This publication gives fishery statistics relating to the landings of the Ivorian trawlers in Abidjan in 1983. The data used are the inquiries made by the C.R.O. on the boats and the auction sheets of the fishing harbour. The data processing was executed on the C.R.O. computer.
  • Transformation empirique des tables numeriques de Galton en tables des probits

    Zabi, S.G. (1983-08)
    Comparison between Galton equation and preston normal logarithms models allowed an empirical reconstitution of probits tables.
  • La peche artisanale maritime en Cote d'Ivoire: le potentiel de peche

    Bouberi, D.; Hie Dare, J.P.; Konan, J. (1983-01)
    The marine artisanal fishery in Ivory Coast covers all the continental shelf, with high activities around Abidjan and San-Pedro. Four types of fishing tackles are recorded: purse seines, beach seines, gillnets and lines. The first three ones are used by Fanti and Awran, who represent three quarters of total artisanal fishermen; lines are used by Ghan, Aladjan and Nanakrou. Canoe, the only artisanal way of navigation, varies in size and shape according to the different fishing communities.
  • Campagnes Nizery: Togo 1 (26 et 27/01/83) et Togo 2 (07 au 10/06/83). Resultats des chalutages

    Lhomme, F. (1983-08)
    This publication gives the results of the bottom trawlings made during the cruises Togo 1 and Togo 2 by the oceanographic research vessel "Andre Nizery" on the continental shelf of Togo during the estimation program of halieutic resources. The report includes: 1 - The report of the cruises Togo 1 and Togo 2; 2 - Some information on the presentation of the results; 3 - The trawl recording cards for the 2 cruises; 4 - The length frequency distributions of the measured samples.
  • Analyses physico-chimiques des eaux de la Lagune Ebrié effectuées de 1979 à 1981 au cours des programmes "Variabilité interannuelle" et "Baie de Biétri"

    Chantraine, J.M.; Guiral, D.; Djedje, R. (1984-10)
    Physico-chemical data collections aimed to assess the interannual variability of the lagoon hydroclimate and the impact of an airport dam on the water quality of the Ebrié lagoon.
  • Statistiques de peche des chalutiers ivoiriens - annee 1981

    Lhomme, F. (1983-01)
    This publication gives fishery statistics relating to the landings of the Ivorian trawlers in Abidjan in 1981. The data used are the inquiries made by the C.R.O. on the boats and the auction sheets of the fishing harbour. The data processing was executed on the C.R.O. computer.
  • Statistiques de pêche des sardiniers ivoiriens - année 1983

    Bouberi, D. (1984-10)
    The sardinella fleet landed the same quantity of sardines in 1983 (11200 tons) as in 1982. Sardinella aurita catches would be more important if the "Syndicat des Armateurs" did not impose quotas - in July 300 boxes and in August 100 boxes by fleet by trip. The extension of the effort to herring stock increased the catches of this species and an over estimation of 44% of the effort have been observed in 1983.
  • Méthodes simples de determination du CO2 total et du carbone organique dissous en eau saumâtre

    Lemasson, L.; Pages, J. (1980-12)
    Total CO2 of brackish water (Ebrié lagoon) is measured with a simple method: degassing and trapping CO2 in NaOh solution, the conductivity of which is a function of the trapped CO2 quantity. A relation CO2 versus salinity is deduced; it is nearly the same as the one deduced from CO2 measurements performed from alkalinity. Dissolved organic C is evaluated with a CHN analyser by evaporating 0.5 ml of acidified sample. Variation coefficient is near 10% for the lagoon values.
  • Ecologie benthique de la Lagune Ebrié. Théorie sur la méthode du DR' pour la mise en évidence de biocoenoses

    Zabi, S.G. (1978-07)
    The theoretical aspect of the DR' method was presented. It suggestes the association of some characteristic transects, the organisms of which will be used to describe the first biocoenoses of the Ebrié lagoon.
  • Stations cotières et station hydrologique cotière d'Abidjan années 1977, 1978 et 1979

    Cissoko, S. (1982-06)
    On tables 1 to 12, daily beach surface temperatures are presented. These temperatures are also ploted on figures 2 to 5 in daily values and in 7, 15, 30 days means. Salinity variations are less important than these of temperature (Fig. 6, 7). It follows that during upwelling period, variations of dynamic height anomaly are closely correlated with temperature (Fig. 6 and 8).
  • Synopsis de la classification des larves et des nymphes de diptères chironomidae des ecosystèmes dulçaquicoles de l'Afrique de l'Ouest: clés de détermination des sous-familles, des tribus et des genres

    Diomande, D.; Gourene, G.; Sankare, Y.; Zabi, S.G. (2000-01)
    Synopsis of this numerically very important Diptera category, which is dominant and consequently of relevance in most aquatic environments.
  • Bibliographie des lagunes et du littoral de Côte d'Ivoire (Afrique de l'Ouest)

    Arfi, R. (1997-05)
    The present bibliography collects references on lagoon and coastal environments in Côte d'Ivoire. It is mainly based on: - the draft bibliography prepared by Charles-Dominique and Durand in 1979, edited in the Archives Scientifiques du Centre de Recherches Océanographiques d'Abidjan (vol. 5 no. 2); - the synthesis on the marine environment, published in 1993 (LeLoeuff, Marchal and Amon-Kothias editors); - and the synthesis on the lagoon environment, published in 1994 (Durand, Dufour, Guiral and Zabi editors). In spite of a careful check of the available documents, it is more than possible that references are lacking or erroneous. That's why this bibliography is still a draft, and the author will be glad to receive complements and/or corrections from lectors. After these contributions, a more comprehensive version will be proposed. Remarks can be sent to this e-mail: arfi@ortsom.orstom.fr or to the postal address.
  • Macrophytes aquatiques dans les eaux "continentales" ivoiriennes

    N'dah, E.; Arfi, R. (1996-06)
    Inventory and socio-economic impacts of water weed are presented. Free-floating species (Eichhornia crassipes, Pistia strationes) floating leaves plants (Nymphaea lotus, Polygonum senegalense) as well as emerged species such as Echinochloa pyramidalis and Nelumbo nucifera are the most common species in the concerned aquatic environments. These plants have been colonizing these environments for about a decade and the colonized area are equivalent to 70 % of the whole of the water surface. Besides, these plants strongly affect water quality and constitute a nuisance for water uses.
  • Station hydrologique de Vridi et stations cotières de 1986 à 1988

    Cissoko, S.; Bakayoko, S. (1995-09)
    In this report were gathered accurate data from coastal stations and from a hydrological station. The used experiments took place from 1986 to 1988.
  • Manuel pratique d'identification des poissons du lac d'Ayamé (Rivière Bia, Côte d'Ivoire)

    Gourene, G.; Teugels, G.G.; Thys van den Audenaerde, D.F.E. (1995-06)
    A taxonomic assessment of fish species was carried out in the Lake Ayamé as a preliminary evaluation within the framework of a project to appraise the biodiversity changes occurred in fish after the construction of a dam at Ayamé in 1959.
  • Lagune de Biétri: bathymétrie, courants et taux de renouvellement des eaux

    Lemasson, L.; Pages, J.; Dufour, P. (1981-12)
    An estimation of the currents in the Biétri bay is given (tidal currents and currents due to the wind). They are lower than 10 cm.s-1 in the whole lagoon, and near of 5 cm.s-1 in the eastern part. The measures of salinity and tidal observations give the average rate of water renewal, respectively 0.20 and 0.14 d-1 in the central and eastern areas.
  • Stations cotières et station Vridi: exploitation des données des années 1984 et 1985

    Bakayoko, S. (1990-11)
    Along the Ivorian seaboard we have seven (7) stations where sea water temperature is measured every morning between 7:30 and 8:00.The hydrologic station of Vridi located at point A (5°05N, 4°05W) is generally exploited twice a week.In this report we are going to deal with data collected in 1984 and 1985. The irregularity of the dynamic height at point A enables us to identify water masses that go over the continental plateau.

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