"Aquaculture is a double-edged sword, however.
Its use as a production method has the potential
to relieve some ofthe overwhelming pressures on
natural fish species. All too often,however, the
techniques used in aquaculture are, in and of
themselves, harmful to the environment, especially
in cases wheremarket forces cause high competition
between aquaculture projects.
The destruction of mangroves and the salination
ofgroundwater inareas where intensive shrimp farming
is practiced is one well knownexample. Another example
is that of a freshwater fish of African origin -
tilapia- which, on one hand is optimal because
of its capacity to reproduce and grow quickly and
ability to survive in low-oxygen water bodies such
as stagnant ponds, yet is also extremely carnivorous
of the eggs and young of its own and other species,
having, in fact led to the depletion of a fish indigenous
to Costa Rica, the Guapeta."
"FAO has recommended climate change adaptation measures among 90,000
poor rural families in the dry corridor. The proposed measures, which
would cost around 18 million dollars over the next four years, would
improve the soil's water retention capacity, make use of integrated
agroforestry systems, guarantee access to seeds, and promote backyard
gardening."