Abstract

CARMONA, Roberto  and  CARMONA, Cynthia. Abundancia y riqueza específica de aves playeras en la playa "El Conchalito", Baja California Sur, durante 1993 y 1995. Hidrobiológica [online]. 2000, vol.10, n.1, pp.69-78. ISSN 0188-8897.

Between 1993 and 1995, the construction of two housing units were built nearby "El Conchalito" beach, Ensenada de La Paz, Baja California Sur. Abundance and richness of shorebirds were censused from February, 1993 to January, 1994 and from February, 1995 to January, 1996, and compared with test of proportion (α=0.05). The results showed that the reductions in abundance and richness were significant. Species abundances were compared using the monthly average percentual difference, using a proportion test. Those species which presented signifficant reductions (Limosa fedoa, Catoptrophorus semipalmatus, Limnodromus spp. and Charadrius wilsonia) were the most abundant in the beach, while those which had no significant differences were those that were scarce (Calidris mauri and Numenius americanus). It is probable that population reductions are related with the disturbance caused by the buildong of a housing facility.

Keywords : Shorebirds; abundance; specific richness; La Paz Bay.

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