. Commercial fisheries review. Fisheries; Fish trade. 52 COMMERCIAL FISHERIES REVIEW Vol. 17, No. 7 Fisheries Research Branch in the Argentine Fish and Wildlife Service (Direccion General de Pesca y Conservacion de la Fauna), the National Institute for the In- vestigation of Natural Sciences "Bernardino Rivadavia;" and the School of Sciences of the Univer- sity of Buenos Aires. Scientists from other institutions will also take part. The first research expedition was conducted during May and June 1954 with the oceanographic vessel Madryn of the Ministry of the Navy, in the main trawl
. Commercial fisheries review. Fisheries; Fish trade. 52 COMMERCIAL FISHERIES REVIEW Vol. 17, No. 7 Fisheries Research Branch in the Argentine Fish and Wildlife Service (Direccion General de Pesca y Conservacion de la Fauna), the National Institute for the In- vestigation of Natural Sciences "Bernardino Rivadavia;" and the School of Sciences of the Univer- sity of Buenos Aires. Scientists from other institutions will also take part. The first research expedition was conducted during May and June 1954 with the oceanographic vessel Madryn of the Ministry of the Navy, in the main trawl fish- ing areas, between latitudes 36 S. and 42 S. The chemists, general biologists, and fishery biologists taking part in this investigation were divided into working groups of three members each, covering the study of plankton, benthos, physical oceanography, and com- mercial Unloading and packing fish at fish wharf, Mar del Plata, Argentina Observations and collections were made in 53 oceanographic stations from the surface to a depth of 1,600 feet. On board the vessel determinations of phosphates, alkalinity, and pH were made. Water samples for determining salinity, oxygen, and other elements were analyzed by the Oceanography Branch of the Ministry of the Navy, and samples of bottom sediments are being studied in the National Institute for the Investigation of Natural Sciences. Fish collections have been distributed to this Institute and the Fisheries Research Branch for examination. Concurrently with this expedition, fishery biologists went out with the trawlers to make a general study of the species caught with particular regard to the yield of hake per haul in the areas where oceanographic observations are being made. The Madryn will make further oceanographic expeditions, one during each sea- son of the year, to obtain a complete cycle of observations, and each month fishery biologists will go out in different types of fishing boats to make continuous observ
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