| dc.description.abstract | Environmental diagnosis of supra-littoral and semiintensive
shrimp farm systems (SCS) in the northwestern
part of Mexico had been developed for a 10-years period
(1993 to 2003). The activities in the construction, operation
and abandonment phases were evaluated by an environmental
impact diagnosis analysis, causal diagrams, complex
analysis systems, relevant environmental criteria analysis,
and fuzzy logic impact assessment. The SCS, divided in
Natural and Socioeconomic subsystems, showed important
negative impact in the construction phase affecting the flora
and fauna because of vegetation removal, but as positively
was detected the employment because of the number of
people hired. During the operation phase, positive impacts
in the Socio-economic subsystem (SEC) were produced by
high-educated employments offers, and increase of life
quality. Opposite, the most important negative effect was
caused by pollutant-enriched water discharges. In the abandonment
phase, negative effects were identified by soil
salinization, acidification, erosion increase, or the ecologic
barriers` role that ponds play. The combination of the
methods applied in this work help to identify in an ordinal
way the magnitude of the environmental impacts on shrimp
cultures in any region and different conditions. | |
