Resumen del producto

Population parameters and the basic cost/benefit in formation of three west American snappers ( Lutjanus spp) were analyzed to determine the most convenient option for their culture. Coasts of the Gulf of California constitute a suitable habitat for snapper and the shoreline contour has the potential for com mercial culture development of snapper, of which Lutjanus peru is a species with high commercial value. In this case, and regardless of the density that fish can attain in the field, the red snapper has the potential of having higher densities than the two other snapper species, where the spotted rose reaches its maximum at the age of 22 weeks, the red snapper reaches it at the 26th week, and the yellow snapper at the 27th week of age. The amount consumed is considerably low before they reach the peak of bi omass production (415 to 579 g), which occurs when they are 20 (spotted rose snapper) and 26 (red snapper) weeks old, respectively. The benefit cost ratio (B/C) displays an exponential curve declining with age, with B/C values higher than 18 at the first w eek, when fish really do not have any commercial value because of their size. However, after the 12 th week, snappers reach from 343 to 448 g mean weight and they begin to acquire commercial value; by this time, the B/C ratio ranges between 4.8 and 5.0, whic h may be attractive as a departing point to consider a commercial farm. The economic equilibrium level (when B/C = 1) is attained between the weeks 43 and 46. Levels of food ration varies from 3 to 7% of fish weight per day, the costs of food range from $0 .15 to $0.3/kg and the value of cultivated fish from $1.0 to $2.00/kg. For this part of the analysis, the total profits and profits per week were chosen at the times of culture when the highest profits and profits per week occurred. This paper may be addre ssed into the right direction for the development of the technology for the cultivation of snappers, one of the most valuable fish resources of tropical west America.

Palabras clave: Lutjanus peru; Lutjanus guttatus; Lutjanus argentiventris; potential culture; Eastern Pacific; Mexico

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