Bilan des recherches sur la crevette rose Penaeus duorarum notialis de Côte d'Ivoire et conséquences en matière d'aménagement

A summary of results obtained from 1969 to 1977 is given. It concerns the biology of the species (ecology and distribution of the adults, behaviour and diel variation of catch rates, reproduction and larval migration, juveniles migration and recruitment at sea, sexual maturity, growth and mortality by marking experiments) and the history of the fishery (catches, efforts, seasonal variations of catch rates). The combined use of a dynamic pool model of Ricker and a production model of Fox leads to the evaluation of the potential of the stock. The simulation of different and combined fishery strategies on adults at sea and juveniles in lagoons, allows the evaluation of the consequences (in yield, value, biomass and potential fecundity) of the different proposed management procedures (reductions in fishing effort, closed seasons on both fisheries).

Quelques notes sur le plancton marin recueilli en 1953, par M. G. Ranson, dans la baie de Nhatrang-Cauda (Viet Nam)

Mr. G. Ranson found a small collection of plankton in Nha Trang (Vietnam), during a mission in the Far East. The samples were harvested in the Bay of Cauda at a water depth of 15-20 m. The author examined a number of samples kept in formalin, extremely rich in diatoms and in good condition. The group of pelagic copepods has been the most carefully studied.

Le Copépodes pélagiques de la Baie de Cauda (Viet-Nam)

The author presents his study on marine pelagic fishes collected on the coast of Annam, in the Bay of Cauda, where the Indochina government built the Institute of Oceanography. These samples allowed the systematic identification of pelagic Copepods.