RNR 1001 : EXAM 3
Document Summary
In addition to freshwater, marine, and wetland ecosystem services, aquatic ecosystems around the planer provide a huger diversity of fisheries resources. Many commercially and recreationally exploited fish and invertebrate stocks declined during the 19th and 20th centuries: reasons include environmental fluctuations and overexploitation. Fisheries are an excellent example of a renewable resource: stocked increase each year from growth and reproduction, sustainable harvests maintain the principal. Historic trends in many fish stocks illustrate the law of the. An important part of fisheries conservation has been the ownership of resources by governments: development of management and research agencies, 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. Temperature/dissolved oxygen-stress in poikilotherms (no reg body temp) Turbidity-a huge problem for all species in water. The characteristics of fish and invertebrate can also provide opportunities to fisheries managers but can also limit c&m options.
