Estado, abundancia y distribución para 15 especies de aves playeras (Charadriidos y Scolopacidos) en El Salvador [Status, abundance, and distribution of 15 species of shore birds (Charadriidos and Scolopacidos) in El Salvador (original) (raw)
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Temporal and spatial distribution of shorebirds (Charadriiformes) at San Ignacio Lagoon, Baja California Sur, Mexico. Baja California Peninsula has several wetlands that represent important ecosystems for shorebirds. San Ignacio Lagoon is one of these sites, and supports 10% of the total abundance of shorebirds reported in this Peninsula. Since there is few information about this group in this area, we studied spatial and temporal changes in abundance and distribution of shorebirds in San Ignacio Lagoon. For this, we conducted twelve monthly censuses (October 2007-September 2008) on the entire internal perimeter of the lagoon, which we divided into four areas: two at the North and two at the South. We observed a seasonal pattern, with the lowest abundance in May (1 585 birds) and the highest in October ). The most abundant species were Marbled Godwits (Limosa fedoa; 55% of the total records), Western Sandpipers (Calidris mauri; 23%), and Willet (Tringa semipalmata; 10%). All three species were more abundant in autumn; for both, the Marbled Godwit and Willet, we observed their highest numbers in winter and spring, while the Western Sandpiper showed noticeable oscillations, reaching a maximum in early winter (December). In summer, Marbled Godwit and Willet were the only birds present but in lower numbers. Here present the first records of the Pacific Red Knot (Calidris canutus roselaari) in the area. Bird abundance and species richness were influenced seasonally by migration and spatially by sites in the lagoon. The greatest shorebird abundance was in the South area of the lagoon, probably because of better accessibility to food. Our results allowed the inclusion of San Ignacio Lagoon in the Western Hemisphere Shorebirds Reserve Network (WHSRN) as a site of international importance. Rev. Biol. Trop. 61 (1): 229-241. Epub 2013 March 01.
Revista de Biología Tropical
El noroeste de México alberga las mayores abundancias de aves playeras del país. Sin embargo, para muchos de estos humedales, información sobre comunidades de aves playeras, como abundancia, tendencias poblacionales y riqueza es limitada. Actualmente, los sitios de descanso son críticos para la conservación porque las poblaciones de aves playeras ha decaído en las últimas décadas. Marismas Nacionales (MN) es un humedal tropical importante con un ecosistema dinámico donde los estudios de aves playeras están limitados a unos pocos censos aereos y terrestres. Así el objetivo del trabajo fue describir la abundancia y distribución espacial y temporal de las aves playeras en MN (temporada 2010-2011). Se seleccionaron ocho unidades de muestreo en las que se llevaron a cabo censos mensuales (noviembre 2010 a junio 2011). Se determinaron las riquezas y abundancias por sitio-mes, además se realizó un análisis espacial y temporal de las especies dominantes. Se registraron 27 especies de aves p...
Abundancia de aves playeras (Charadriiformes: Scolopacidae) y su relación con la temperatura del agua en un humedal de Perú (2013-2019), 2021
Introduction: Scolopacidae family (Order: Charadriiformes) is one of the most abundant families found in coastal wetlands. La Arenilla coastal wetland has a historical record of 20 scolopacid species; climatic events could affect the distribution and migration of the several species of this taxonomic family, reducing their species richness and abundance. Objective: The aim of the present study was to determine the relationship between richness and abundance of the species belonging to the Scolopacidae family and both Sea Surface Temperature (SST) and the coastal El Niño index (ICEN) in La Arenilla Coastal Wetland, La Punta, Callao. Methods: Sampling were carried out twice a month, between January 2013 and January 2019 using the Total. Count Method in order to determine species abundance (N = 292). A Spearman correlation analysis between abundance, species richness, SST and ICEN was performed, and beta diversity was calculated through the Whittaker index (βw) to analyze both the annual turnover for each season and the seasonal turnover within each year. Results: Two significant correlations were obtained: between SST and abundance and between ICEN and species richness. On the other hand, the ANOSIM test showed seasonal differences in abundance, and the SIMPER test showed that the greatest difference in abundance between seasons was between autumn and spring (Bray- Curtis dissimilarity = 81.57 %), and the minimum difference between winter and spring (Bray-Curtis dissimilarity= 49.86 %). Conclusions: The ecological dynamics of scolopacid communities in La Arenilla coastal wetland face important changes according to the variations in the environmental thermal parameters related to climate change. Key words: migratory; abundance; species richness; Scolopacidae; coastal wetland; climate change.
Entre junio a septiembre de 2004 fueron registrados diez sitios de anidación de aves acuáticas en la costa de El Salvador. Se realizaron dos visitas en cada sitio para observar el desarrollo reproductivo. Se contabilizaron los árboles ocupados y nidos existentes e inmaduros y juveniles de cada especie. La anidación fue registrada por nidos con polluelos, juveniles e inmaduros y adultos incubando para un total de 17 especies. Siete de las colonias estaban situadas en asociaciones de bosque salado. Los sitios de anidación mostraron una marcada tendencia a permanecer inundados, aislados y con vegetación de diferente porte que proporciona superficie de apoyo a los nidos. Ocho de estas colonias son nuevos sitios de anidación para el país. Las especies con mayor número de colonias fueron Bubulcus ibis (n=7), Ardea alba (n=7), Eudocimus albus (n=5) y Cochlearius cochlearius (n=4). Estas especies también poseen el mayor número de nidos: 2,328, 351, 111 y 158, respectivamente. Sólo tres de las colonias cuentan con vigilancia y establecimiento como área protegida (Barra de Santiago), mientras que en dos existe protección por comunidades locales (Metalio e Isla Las Gaviotas). Se registra por primera vez para la planicie costera salvadoreña la anidación de Phalacrocorax brasilianus (28 nidos) y Nycticorax nycticorax (30 nidos). Así como el mayor número de nidos registrados de Anhinga anhinga (12 nidos), Cochlearius cochlearius (158) y Rynchops niger (33 nidos). Se registraron siete especies de árboles utilizados para anidar, siendo la mayoría de asociación manglar (Rhizophora mangle, Avicennia nitida y Laguncularia racemosa) y Phyllantus elsiae, Coccoloba caracasana, Annona reticulata y Ficus sp. Bubulcus ibis es la especie que utiliza todas las especies arbóreas en los sitios de anidación, seguida de Egretta tricolor (n=4). Se ha contribuido al conocimiento de la biología reproductiva, así como de hábitos alimenticios de polluelos durante la crianza para Phalacrocorax brasilianus, Cochlearius cochlearius y Ardea alba. Se identificó siete amenazas de carácter antropogénico sobre las colonias. Las amenazas mayoritariamente registradas fueron el turismo descontrolado y la contaminación por desechos sólidos.
The Neotropical Cormorant (Phalacrocorax brasilianus) is a common bird in continental wetlands and coastalmarine ecosystems. Nevertheless, there is a lack of information about reproductive colonies, distribution and abundance in El Salvador. We studied the distribution of this species from April to June 2004 in 58 wetlands. In order to consider the abundance by wetland, we carried out counts on the shores of four of them (Güija Lake, Cerrón Grande Reservoir, El Jocotal and Olomega lagoons). Counts were carried out from October to May of 2001-2005. Three colonies (Cerrón Grande reservoir, Bay of Jiquilisco and Güija Lake) were located where we registered nesting events. The species was present in 16 of 58 visited wetlands (27%). The highest number of populations (n = 8) but lowest densities of individuals (100-500 individuals by wetland) were recorded in coastal wetlands. These low numbers, compared with those found in hydroelectric reservoirs (up to 10,000 by wetland) could be due to the residual effect of the use of pesticides in the coastal plain from 1960 to 1982 during the boon of cotton agriculture. In the colonies that we visited, up to 1,359 nests were located. In all the cases P. brasilianus nested in association with others species of the Ardeidae family
Patrones de presencia y abundancia de aves terrestres en la isla Saliaca, Sinaloa, México
Revista mexicana de …, 2009
Resumen. Se determinó la abundancia y composición taxonómica de las aves terrestres en la Isla Saliaca, Sinaloa, México, mediante puntos de conteo en 3 periodos de muestreo (verano, otoño e invierno) y 3 tipos de hábitat (bosque espinoso, manglar y duna). Se observaron 82 especies, un número más alto que el registrado para cualquier otra isla del golfo de California. La riqueza y abundancia fueron mayores en otoño (59 especies, 9.2 ± 1.2 aves por punto) e invierno (48 y 7.5 ± 0.9) que en verano (33 y 5.2 ± 0.3); este patrón refl eja el arribo de aves migrantes neotropicales. En cuanto a los tipos de hábitat, la mayor riqueza y abundancia se encontró en el bosque espinoso (60 especies y 9.3 ± 0.9 aves por punto), seguida por manglar (16 y 3.3 ± 0.8) y duna (3 y 1.0 ± 0.2), lo cual es acorde con la estructura vegetal más compleja y la área de cobertura mayor del bosque espinoso. La isla Saliaca puede representar un relicto del hábitat costero regional, por lo que es importante su protección y conservación.
The neotropical cormorant (Phalacrocorax brasilianus) is a species of waterfowl abundant in the wetlands of El Salvador. Fish predation on aquatic ecosystems is generating a conflict with fishermen that associating declining fishing with predatory behavior of this bird. From April 2010 to February 2011, an investigation was conducted aimed at knowing the state of the population of P. brasilianus in the Ramsar wetland Cerron Grande, El Salvador. The study was conducted through counting and collecting of birds, to analyze the stomachic contents. The maximum recorded was 28.063 individuals and 3,000 breeding pairs. 266 birds were collected, on 207 it found fish in their stomachs, whose individual weight ranged from 2-307 g ± 52 g. A total of 1,078 fish specimens was found, from ten species, four of them obtained the highest values of abundance: bagre (Cathorops steindachneri) with 29%, followed by guapote (Parachromis managuensis) with 25%, tilapia (Oreochromis niloticus) with 22% and plateada (Astyanax aeneus, Roeboides bouchellei) with 31%.