RNR 1001 Chapter : Many Commercially And Recreationally Exploited Fish And Invertebrate Stocks
Document Summary
Many commercially and recreationally exploited fish and invertebrate stocks. Declined during the 19th and 20th centuries. B/c environmental fluctuations and overexploitation -29% overfished. Commons or tragedy of the commons (fisheries conservation) exploitation without ownership " resource decline. An important part of fisheries conservation has been the. "ownership" of resources by governments : controlling effort of primary importance harvest, fishers, boats, gear, season, area. Aquatic habitats provide opportunities to fisheries managers but can also limit c&m options. Water has a high density (fisheries conservation) movement difficult (stress) Turbidity (fisheries conservation) a problem for plants, fishes -> low pp, limited feeding, larval mortality. Fishes are ____ to the environment (fisheries conservation) Indeterminate growth (fisheries conservation) increasing size with age. High fecundity, poor survival of early life stages. The basis of important commercial and recreational fisheries (ephemeroptera, pleoptera, trichoptera) Invertebrates (fisheries conservation) also the basis of important commercial and recreational fisheries.
