RNR 1001 : Test 3 Notes RNR
Document Summary
In addition to freshwater, marine, and wetland ecosystem services, aquatic ecosystems around the planet provide a huge diversity of fisheries resources. World commercial fisheries harvests in 2008 142 million metric tons (mmt) About 110 mmt was made up of finfishes. The other 32 mmt comprised of mostly of crustaceans and mollusks (also kelp) The commercial sector includes food fisheries as well as industrial fisheries. Freshwater and marine recreational fishing important in many countries: sport fish (we cannot sell them its illegal) Many commercially and recreational exploited fish and invertebrate stocks declined during the. Reasons include environmental fluctuations and overexploitation: atlantic halibut, cod. In addition, many non- exploited aquatic species also declined in abundance from habitat loss and degradation. Fisheries are an excellent example of a renewable resource. Stocks increase each year from growth and reproduction. Historic trends in many fish stocks illustrate the law of the commons.
