Cod larvae sampling with a large pump off SW-Island. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983

Abstract

In an attempt to collect adequate samples of cod and other larvae in the spawning areas off SW-Iceland, experiments using a large fish pump for this purpose were carried out from 1981 to 1983. The pump used was an 8" hydraulic centrifugal pump commonly used by fishing vessels in Iceland. In 1981 samples were taken at a fixed station off Reykjanes at 6-8 depths from 0 to 34 m at 4 h intervals for 36 h. In 1982 and 1983 vertical profiles were taken at various stations. From the samples valuable information on the larvae and their distribution and feeding was obtaind. It is concluded that the development of a convenient pumping system has been quite successful. The main limitations of the system is that sampling would be rather time consuming in areas of low larval density. For the present studies it does not mattet but this could be limiting in studies in coming years of other areas at Iceland with less spawning.