Controlling the overgrowth of invasive aquatic vegetation is asignificant problem in the waterways of most U.S. states.Originally, herbicides and dredging were used for control, butin 1963, diploid Asian carp were introduced in Alabama and Arkansas.Unfortunately, through escapes and illegal introductions, the carpspread rapidly and became serious threats to aquatic ecosystems in45 states. Beginning in 1983, many states began using triploid, sterilegrass carp as an alternative, because of their inability to reproduce,their longevity, and their voracious appetite. On the other hand, thisgenetically modified exotic species, if not used properly, can reduceor eliminate desirable plants and outcompete native fish, causing moredamage than good. The use of one exotic species to control otherexotic species has had a problematic history across the globe, generatingcontroversy and criticism. Newer methods for genetic modificationof organisms to achieve specific outcomes will certainly becomemore common in the future and raise several interesting question. Question: What ethical responsibilities accompany the ecological andeconomic risks and benefits of releasing exotic species intothe environment? Who pays the costs if ecosystems and foodsupplies are damaged?
Controlling the overgrowth of invasive aquatic vegetation is a
significant problem in the waterways of most U.S. states.
Originally, herbicides and dredging were used for control, but
in 1963, diploid Asian carp were introduced in Alabama and Arkansas.
Unfortunately, through escapes and illegal introductions, the carp
spread rapidly and became serious threats to aquatic ecosystems in
45 states. Beginning in 1983, many states began using triploid, sterile
grass carp as an alternative, because of their inability to reproduce,
their longevity, and their voracious appetite. On the other hand, this
genetically modified exotic species, if not used properly, can reduce
or eliminate desirable plants and outcompete native fish, causing more
damage than good. The use of one exotic species to control other
exotic species has had a problematic history across the globe, generating
controversy and criticism. Newer methods for genetic modification
of organisms to achieve specific outcomes will certainly become
more common in the future and raise several interesting question.
Question: What ethical responsibilities accompany the ecological and
economic risks and benefits of releasing exotic species into
the environment? Who pays the costs if ecosystems and food
supplies are damaged?
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