1 resultado para Moderating effect

em Aquatic Commons


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A brief review of work carried out since the laboratory was established ten years ago will put present studies into perspective and show to what extent the aims of this organisation are being fulfilled. These aims can be simply defined under two heads: the maintenance of a watch on the commercial fisheries and original research designed to provide the necessary if these fisheries are to be exploited rationally and managed efficiently. While reference to past results, which cover a wide range of subjects, can best be made in the appropriate sections of this report, a short general statement on the Lake Victoria Fisheries may be useful. From the earliest records contained in Michael Graham's Report it was clear that even before 1929 considerable inroads had been made the stocks of fish in Lake Victoria. Some control measures were subsequently introduced which must have had a moderating effect, but so the Game Department reports continued to express concern regarding the state of the fisheries. During the last war some reduction in fishing effort occurred due to ,a shortage of nets, this afforded some respite to the fisheries, but after this period the fishing effort again increased steadily. At the present time the fishing effort is higher than it has ever been.