KEY NORTH AMERICAN MIGRATION SITES FOR
Red Knots & Semipalmated Sandpipers

Bahía Yavaros

Country: Mexico

Region: Sonora,

Nearest city/town: Huatabampo

Site: Bahía Yavaros

Species/Sub-species: REKN-roselaari

Total biogeographic population: 21,770

Count Method: Maximum day count

Count: 2521

% biogeographic pop. at site: 1.16

Season (primarily): Winter

Site recognition: Ramsar IBA

Site recognition (other): Located in the Sonoran Joint Venture Bird Conservation Plan

Site description: Land ownership is a mix of federal, municipal, state, community, private and unknown. The body of the lagoon and the area designated as federal maritime land area and coastal environments are under federal jurisdiction. The lands belonging to the Moroncarit ejido and the Bachoco indigenous community, as well as the rest of the area, are under both municipal and state jurisdiction. The three levels - municipal, state and federal - are responsible for the environment under the Law of Ecological Balance and Environmental Protection (Ley de Equilibrio Ecológico y Protección al Ambiente) in the State of Sonora. The habitats are a mix of mud bays, tidal flats, sand beaches, and mangroves. According to the Ramsar Classification System for Wetland Type, the habitat characteristics for this site are marine and coastal, including permanent shallow marine waters less than six metres deep at low tide (which includes sea bays and straits), intertidal mud, sand or salt flats; sand, shingle or pebble shores (which includes sand bars, spits and sandy islets, and dune systems); and coastal brackish/saline lagoons (which includes brackish to saline lagoons with at least one relatively narrow connection to the sea). Existing knowledge about the site has been gathered through research studies including aspects such as climate, hydrology, geology, soils, flora and fauna, social and cultural, fishing and aquaculture3. The specific studies are: Evaluation and Requirements Management of Coastal Wetlands in Southern Sonora: Natural Resources, Human Activities and Environmental Education4, Economic and technical feasibility studies for dredging and rehabilitation of Yavaros - Moroncarit lagoon system in Yavaros, Sonora5, and Tactical Management Program for Coastal Wetlands in the municipality of Huatabampo , Sonora6. In 2016, work underway at the site included shorebird research (RK-roselaari), and work by Ducks Unlimited to enhance the wetland area in the lagoon complex with funding from NAWCA and the Tactical management program.

Known threats: This site is threatened by over-exploitation of renewable resources, in terms of habitat effects from fishing and harvesting aquatic resources (i.e. the shrimp industry) and hunting and trapping. Shrimp farming is also a threat due to expansion and intensification of marine and freshwater aquaculture - industrial aquaculture (e.g., Sociedad Cooperativa De Producción Pesquera Bahía Yavaros S.C. De Rl). For site land use change, threats include transportation (roads infrastructure), agricultural expansion (annual crops - agro-industry farming), and natural system modification – other ecosystems modification (dams and water management/use). Agriculture expansion at the site is causing a reduction in available habitat for shorebirds. Human disturbance from recreational activities and particularly tourism is also a threat.7

Notes: The draft boundaries of the site followed the bay contour.

Sources: 1 Carmona, R. y G.D. Danemann. 2014. Monitoreo de aves playeras migratorias en 11 sitios prioritarios del Noroeste de México y reconocimiento invernal de cuatro sitios adicionales. Ciudad de México, D.F., México. 2http://www.rufford.org/files/13886-1%20Detailed%20Final%20Report.pdf 3Comisión de Ecología y Desarrollo Sustentable del Estado de Sonora.2009. Ficha Informativa de los Humedales de Ramsar- Humedales de Yavaros – Moroncarit. Sonora, México. 4Valdés, C. C., B. M.Tordesillas, B. B. Alan, C. E.Chavarría, B. A. Oriza, y N. E.Bravo. 1994. Evaluación y requerimientos de manejo de los humedales costeros del sur de Sonora: Recursos naturales, actividades humanas y educación ambiental. Guaymas: Unidad de Información Biogeográfica. Centro de Conservación y Aprovechamiento de los Recursos Naturales, Instituto Tecnológico y de Estudios Superiores de Monterrey-Campus Guaymas. 5Reyna E., S. O. 1997. Estudio de factibilidad técnica para dragado y rehabilitación del sistema lagunar Yavaros –Moroncarit en Yavaros, Sonora. Mérida: 4to. Congreso Nacional de Ciencia y Tecnología del Mar. 6Muñoz, V. M., C. M.Cruz, C. C. Valdés, C. M. López y H. A. G. Alonso. 2000. Programa Táctico de Manejo de los Humedales Costeros del Municipio de Huatabampo, Sonora. Guaymas: Centro de Conservación y Aprovechamiento de los Recursos Naturales. Instituto Tecnológico y de Estudios Superiores de Monterrey-Campus Guaymas. 7http://www.mxempresa.com/e/empresa/sociedad-cooperativa-de-produccion-pesquera-bahia-yavaros-s-c-de-rl/6179332