Fish stock assessment: a manual of basic methods
Wiley, 12 jul. 1983 - 223 páginas
Describes the scientific techniques used in assessing fish stocks, evaluating the effect of fishing on these stocks, and the probable impact of different policies for developing and managing fisheries. Covers the techniques developed starting with simple models and continuing to more complex methods.
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BASIC CONCEPTS AND DATA SOURCES
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adult stock age-groups amount of fishing analysis anchovy average biomass by-catch calculations catch and effort catch per unit catchability coefficient caught cent changes CIEM constant decrease demersal density determined distribution effect equation estimates example Exercise exploited factors FAO Fish fish populations fish stocks fishermen fishery fishing effort fishing intensity fishing mortality fishing power gill-net give given growth curve Gulland haddock increase individual fish linear regression maximum sustainable yield measure mesh methods mortality coefficient natural mortality North Sea number of fish observed obtained otoliths overfishing parameters pattern of fishing pelagic percentage period plaice plot Population Dynamics possible predators proportion purse-seine redfish regression relation Ricker sampling selection curve shrimp spawning species statistics stock abundance stock assessment stock-recruitment surveys Table tagged fish tons total catch total mortality trawl trawlers tuna unit effort unit stock variation vessels weight whales year-class yellowfin tuna yield-per-recruit