Abstract

IBANEZ, Ana L.; ESPINOSA-PEREZ, Héctor  and  GARCIA-CALDERON, José L.. Recent data on the distribution of the exotic species used in Mexican freshwater fisheries based on fish stocking. Rev. Mex. Biodiv. [online]. 2011, vol.82, n.3, pp.904-914. ISSN 2007-8706.

Federal government produced around 780 millions of fry belonging to 22 taxa during 2001-2009 which were stocked in Mexican reservoirs basically to enhance fisheries. With official information from the federal fisheries agency CONAPESCA stocking-production analysis for the fish farms from the federal government was studied at state level. We review stocking-yield relationship at state level. From the 22 taxa: 19 are fish (7 native species) and 2 subspecies; 2 native amphibious and 1 Malay crustacean. Production mean for nine-year period was 86.7 ± 37.9 millions of fry, 90% of which were tilapias and carps while only 3% were native species. Stocking/ha vs Yield/ha were clearly related, thus at more stocking rate more production was obtained arriving to an asintotic value. At present, federal government policy don’t allow to stock exotic species in natural water bodies, nevertheless they stay there because of previous or local stocking events.

Keywords : stockings; fresh-water fisheries; CONAPESCA; Mexico; exotic species.

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