Sea Fisheries: Their Investigation in the United KingdomMichael Graham E. Arnold, 1956 - 487 pagine |
Sommario
SCIENCE AND THE BRITISH FISHERIES | 1 |
and 5 Noncrustaceous zooplankton | 4 |
FISHERIES OF THE UNITED KINGDOM | 10 |
Copyright | |
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Parole e frasi comuni
abundance age-groups animals areas Atlantic Barents Sea beds benthos biological bottom British brood Calanus catch caught cockles cod-end commercial copepods crabs crustacea curve demersal density depth diatoms distribution dredging egg-production English Channel estimate estuaries exploited factors Faroe fathoms feeding females fishermen fishery fishing intensity fluctuations gear Greenland grounds growth haddock hake hauls Iceland important increase investigation landings large number larvae length life-history lobsters mackerel marine marked mature mesh method migration mortality mussels natural nets North Sea Norwegian number of eggs nutrients obtained occur organisms otoliths oysters pelagic pelagic phase period phytoplankton plaice plankton population prawns production quantities recruitment regions Sagitta sampling sclerites Scotland Scottish season shell shoals shown shrimps spawning species stage statistics temperature tion trawl trawlers Trematoda usually variations vessels Wales weight whilst winter year-classes yield young fish zooplankton