APES chapter 12- FRQ


Terms in this set (...)

aquaculture FRQ
practice of raising marine and freshwater fish in freshwater ponds or underground cages in coastal or open ocean waters
advantages of aquaculture
high efficiency, high yield, decreased over harvesting of fisheries, decreased fuel use, increased profits
disadvantages of aquaculture
large inputs of alnd, feed and water, large waste output, loss of mangroves/estuaries, species fed grain/fishmeal/fish oil, dense pop vulnerable to disease, escaped farm fish can disrupt wild fish gene pool, fish on fishmeal diet found to be contaminated with toxins found on ocean bottoms (PCBs)
integrated pest managment (IPM)
process in which each crop and pest are evaluated as part of an ecological system so farmers can design a control program involving a combination of cultivation, biological and chemical techniques tailored to each situation
aim/goal of IPM
to reduce crop damage at an economically tolerable level
steps in IPM if a pest is getting to a high level
biological methods (natural predators)+cultivation controls (altering planting times and using bug vacuum machines+small amount of natural herbicides
crop rotation and monitoring, pesticide rotation to stunt genetic resistance, cover crops
pros of IPM
decrease pest costs by 50-60%, no yield decrease, decrease development of genetic resistance, decrease input of fertilizer and water, pollution prevention
cons of IPM
need for time and education, methods situationally specific, intial cost high, hindered by subsidies