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The artisan fishing ground of the black ark shell Anadara tuberculosa (Sowerby, 1833) in Baja California Sur, previous studies, indicate that most banks are intensively (fishing areas) until the diminution of the yields in the abundance and sizes of the organisms, forcing the beginning of the catch of other banks. In order to provide information on the possibility of using tagging experiments to study rotating fisheries areas, a local experiment was designed in two almost unexploited areas: El Mogote and El Conchalito in the Ensenada de La Paz. The study is based on a fitting-months sampling period from October, 2010 through January, 2012 during which bimonthly length frequency measurements and tagging experiments were carried out. Black arks were captured by hand during low tide and one hour period of time. The first sampling was to estimate the abundance in three parcels. The second sampling returned them to the parcel identified as the repopulation experiment (P3) and the parcels P1 and P2 were using as donate organisms (extracted about 50% of the abundance). The collected ones in the following samplings were returned to the original parcel of capture. In the Estero “El Conchalito” was a density average of 0.89 ind/m² (±0.19 s.d.), with a minimum of 0.52 ind/m² and maximum of 1.90 ind/m². In the P1 parcel the effect of the intensive fishing was observed clearly in the 2 and 3 bimestre, initiating one pretend recovery from the twelve-month. In the P2 parcel there were no changes in the density. In the estero “El Mogote”, was a density average of 1.76 ind/m² (±0.78 s.d.), with a minimum of 0.89 ind/m² and a maximum of 2.90 ind/m². The effects of the fishing were evident in the two parcels in the bimestre 3 and 4, initiating the recovery in the eight months. At the repopulation parcels, the densities indicate an increment from 0.35 to 1.32 ind/m² in Estero “El Conchalito” and from 0.93 to 2.45 ind/m² in Estero “El Mogote”. Generally the results show that the possible recovery of banks affected by the fishing at mean levels of the original density can take around eight months.

Palabras clave: Ensenada de La Paz; Anadara tuberculosa; Rotating fishing

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