La importancia de Punta Rasa, Buenos Aires, en la migración del Chorlo Rojizo, (Calidris canutus)

Blanco, Daniel; Goñi, H. Rodriguez; Pugnali, Germán D.

doi:10.56178/eh.v13i3.1065

Cited by 8 publications

(3 citation statements)

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“…These values were then extrapolated to the total number of small/medium-and large-sized shorebirds observed in aerial surveys. The Red Knot was excluded from this extrapolation because it is known that the species is virtually absent in Samborombón Bay, except from Punta Rasa (Blanco et al 1992;Vila et al 1994;Martínez-Curci et al 2015c). The minimum percentage of individuals of each biogeographic population using the area was calculated from mean abundance by applying population estimates obtained from the literature [American Oystercatcher (Clay et al 2010b); American Golden-Plover, Semipalmated Plover, Hudsonian Godwit, Greater Yellowlegs, Lesser Yellowlegs, Ruddy Turnstone, and White-rumped Sandpiper (Andres et al 2012); Twobanded Plover, Rufous-chested Dotterel, and Blacknecked Stilt (Wetlands International 2017)].…”

Section: Discussionmentioning

confidence: 99%

“…In Samborombón, Argentina, particularly, almost all of the extensive intertidal flats are inaccessible by land or water. Previous investigations were conducted using terrestrial methodologies that covered a small percentage of the area (Blanco et al 1992(Blanco et al , 2006Martínez-Curci et al 2015a). Only two earlier studies that conducted aerial surveys in the 1980s and 1990s included most or even all of these extensive intertidal flats, but neither of them considered the four seasons of the year.…”

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Shorebird Population Estimates Using Seasonal Aerial and Terrestrial Surveys at Samborombón Bay, Argentina

Martínez‐Curci

Isacch

2017

Waterbirds

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Information about shorebirds is essential for predicting the impact of natural and human-mediated changes on their populations. Aerial and terrestrial surveys were performed to characterize shorebird abundance, spatial distribution and assemblage composition at Samborombón Bay, Argentina, during different tide levels and seasons. Approximately 60,000 shorebirds were observed using the intertidal flats. Highest abundances occurred during austral summer, autumn and spring when Nearctic migrants dominate the assemblage. Significant percentages (> 1%) of the populations of three Nearctic migrants [American Golden-Plover (Pluvialis dominica), Hudsonian Godwit (Limosa haemastica), and White-rumped Sandpiper (Calidris fuscicollis)], one Neotropical migrant [Two-banded Plover (Charadrius falklandicus)], and two resident species [American Oystercatcher (Haematopus palliatus) and Black-necked Stilt (Himantopus mexicanus)] were estimated. Large numbers of Semipalmated Plovers (C. semipalmatus), Rufous-chested Dotterel (C. modestus), and Ruddy Turnstones (Arenaria interpres) were also recorded. Management measures aimed at maintaining healthy, viable populations should address species needs during all four seasons focusing on the southern and central sectors of Samborombón Bay, which are the most important feeding areas for shorebirds.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Shorebird Population Estimates Using Seasonal Aerial and Terrestrial Surveys at Samborombón Bay, Argentina

Martínez‐Curci

Isacch

2017

Waterbirds

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“…The coast of the Buenos Aires province, Argentina, includes a remarkable diversity of habitats (Schnack 1985). These coastal habitats are used by more than fifteen nearctic shorebirds (families Charadriidae and Scolopacidae) as staging areas during their southward and northward migration, and for some species as long-term resting sites during the austral summer months (Myers and Myers 1979;Martínez 1986;Blanco et al 1988Blanco et al , 1992Blanco et al , 1995Vila et al 1994).…”

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Distribution and Abundance of Non-Breeding Shorebirds Along the Coasts of the Buenos Aires Province, Argentina

Blanco¹,

Yorio²,

Petracci³

et al. 2006

Waterbirds

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The coast of the Buenos Aires province, Argentina, includes a remarkable diversity of habitats and is used by more than fifteen Nearctic shorebird species during the austral summer months. We evaluated non-breeding shorebird distribution and abundance patterns along the Buenos Aires coastal zone and determined shorebird use of different coastal landscapes. Surveys were conducted in December 2000, and January and February 2001, using line-transect methods. The data were classified based on five previously defined coastal landscapes. Fifty four localities were surveyed covering 93 kilometers of coastline. A total of 44 waterbird species corresponding to 13 families were recorded. Shorebirds (Scolopacidae, Charadriidae, Haematopodidae and Recurvirostridae) accounted for approximately 45% of recorded waterbirds, including 14 nearctic species. Shorebird species recorded per locality varied from one to eleven, with 61% of the localities having one to four species. The most common were the American Oystercatcher ( Haematopus palliatus ), White-rumped Sandpiper ( Calidris fuscicollis ), Two-banded Plover ( Charadrius falklandicus ), American Golden-Plover ( Pluvialis dominica ) and the Sanderling ( Calidris alba ). Shorebird species richness and abundance varied significantly among coastal landscapes, with the highest values recorded in estuarine saltmarshes of Bahía Samborombón and Bahía Blanca. Among marine landscapes, the highest abundance and number of species were recorded in sandy beaches with "restinga" patches. This study confirms that shorebirds are an important component of the birdlife in the Buenos Aires coastal zone during the austral summer months, and that their distribution is not homogeneous along the coast, with species richness and abundances varying among localities depending on coastal landscapes.

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Use of Peninsula Valdes (Patagonia Argentina) by migrating Red Knots (Calidris canutus rufa)

Musmeci

Hernández

Bala

et al. 2012

Emu - Austral Ornithology

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Red Knots (Calidris canutus rufa) that winter in southern South America stop on Peninsula Valdes, Patagonian Argentina, on their northern passage. The Peninsula comprises two large gulfs, each of which has two high and two low tides per day; high tides in San José Gulf correspond to low tides in Nuevo Gulf and vice versa. We conducted weekly censuses of Red Knots on several beaches on these gulfs between March and May in 2006 and 2007 and observed marked individuals. We undertook an aerial survey of the coasts of the two gulfs each April. The use of the different beaches on the two gulfs by Red Knots varied significantly in both years of the study, and the patterns of use differed between 2006 and 2007.In both years, maximum numbers of Red Knots were counted in April. Observations of marked individuals confirmed that Red Knots use more than one beach on Peninsula Valdes, and on one occasion marked individuals were seen on the same day using beaches on both gulfs, thereby maximising their foraging time. Our observations suggest that Peninsula Valdes is an important place on the northern migration route of Red Knots.

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La importancia de Punta Rasa, Buenos Aires, en la migración del Chorlo Rojizo, (Calidris canutus)

Cited by 8 publications

References 0 publications

Shorebird Population Estimates Using Seasonal Aerial and Terrestrial Surveys at Samborombón Bay, Argentina

Shorebird Population Estimates Using Seasonal Aerial and Terrestrial Surveys at Samborombón Bay, Argentina

Distribution and Abundance of Non-Breeding Shorebirds Along the Coasts of the Buenos Aires Province, Argentina

Use of Peninsula Valdes (Patagonia Argentina) by migrating Red Knots (Calidris canutus rufa)

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