Breeding Observations of the Peruvian Tern in Chile

Vilina, Yerko A.

doi:10.2307/1521741

Cited by 9 publications

(15 citation statements)

References 1 publication

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“…Current numbers of Peruvian Terns are unknown because Perú 's 2,500-km desert coast has never been completely surveyed. A similar situation has been observed along the northern Chilean coast, where Peruvian Tern breeding sites have been documented in Arica (Devillers and Terschuren 1976), Iquique-Chucumata (Goodall et al 1951), Río Loa delta (Guerra-Correa 2003) and in the Peninsula of Mejillones from Chacaya to La Rinconada (Vilina 1998, González 1990, Rottmann and González 1991. In the Mejillones area, a total of 257-287 individuals distributed at eight colonies have been recently counted (Guerra-Correa 2003).…”

Section: Introductionsupporting

confidence: 67%

“…Peruvian Terns are one of the smallest terns with a total length of 23 cm (Harrison 1985) and chicks’ asymptotic body weight of 50 g (Guerra-Correa 2003, Zavalaga et al in press). They nest over large, open areas on the mainland desert plains (Murphy 1936, Vilina 1998). One of the most noteworthy traits of Peruvian Terns is their lack of gregariousness.…”

Section: Methodsmentioning

confidence: 99%

“…One of the most noteworthy traits of Peruvian Terns is their lack of gregariousness. Breeding sites typically have fewer than 10 nests, with densities of 5–7 nests km −2 (Vilina 1998, Zavalaga et al in press). Breeding is asynchronous with egg-laying from September-October to January-February (Vilina 1998, Guerra-Correa 2003, Zavalaga et al in press).…”

Section: Methodsmentioning

confidence: 99%

“…However, these estimates represent minimum numbers as a large proportion of the northern Chilean desert plains have remained unexplored. Likewise, at all Chilean locations, Peruvian Terns were exclusively associated with inland desert plains (1–2 km from the coastline), probably to avoid encounters with terrestrial predators (Vilina 1998, Guerra-Correa 2003). Nevertheless, some locations on the Peruvian coast are on sandy beaches associated with coastal wetlands (Zavalaga et al 2008).…”

Section: Introductionmentioning

confidence: 94%

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Current status of Peruvian Terns Sternula lorata in Perú: threats, conservation and research priorities

Zavalaga

Hardesty²,

Mori³

et al. 2009

Bird Conservation International

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SummaryPeruvian Terns Sternula lorata breed in the sand desert plains of the coast of Perú and northern Chile. Because of their long-term population decline, Peruvian Tern is categorized as ‘Endangered’ on the IUCN Red List. The observations that formed the basis for that decision were made in the 1970s and 1990s. In this study, we compile information on distribution, numbers, habitat use and threats of Peruvian Terns that has become available between 2003 and 2008 from 14 localities on the Peruvian coast. Peruvian Tern sites are located between the mangroves of San Pedro de Vice in the north (5o31’S) and the wetlands of Ite in the south (17o56’S). From the 14 locations, five are reported for first time: Virrilá, Eten, Huanchaco, isla Mazorca and Ite. There were only four active breeding sites: Pacasmayo, Paraíso, Pampa Lechuzas and Tres Hermanas-Yanyarina; however, some localities were visited outside the breeding season and should be surveyed between October and February to search for nests. The presence of 283 individuals was confirmed at the 14 sites in an area of approximately 1,388 ha (which represents only 0.35% of the total suitable area for nesting along the Peruvian coast). Thus, the number of Peruvian Terns in Perú should increase with systematic surveys. Here for the first time we report the importance of wetlands for the Peruvian Terns (43% of the sightings occurred in this habitat). Wetlands can offer optimal conditions for feeding, but the cost of using them is becoming higher with a sharp increase of human expansion into coastal areas and urban development around wetlands. We identified the following threats affecting Peruvian Terns on their feeding and breeding grounds: 1) recreational activities; 2) off-road driving by fishermen and tourists; 3) wetland pollution and water use for irrigation; 4) conversion of desert plains to agricultural land; 5) management of wetland water levels; 6) presence of feral cats and dogs, and 7) oil exploration on the desert plains. These adverse factors can be eradicated by the protection of tern sites and public awareness and education. Conservation actions, monitoring and research priorities are suggested.

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Section: Introductionsupporting

confidence: 67%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

See 2 more Smart Citations

Current status of Peruvian Terns Sternula lorata in Perú: threats, conservation and research priorities

Zavalaga

Hardesty²,

Mori³

et al. 2009

Bird Conservation International

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“…S. lorata es una especie endémica de la corriente de Humboldt (Vilina, 1998), se distribuye desde La Isla El Muerto en el Golfo de Guayaquil en Ecuador hasta Antofagasta en Chile (Murphy, 1936;Harrison 1985;Vilina 1998) y su área de reproducción se encuentra a lo largo del litoral peruano (Murphy, 1936;Harrison, 1985) y el litoral chileno hasta Mejillones -Región de Antofagasta (Vilina, 1998). En el Perú se conocen cuatro lugares de reproducción: Pacasmayo, Paraíso, península de Paracas y Tres Hermanas-Yanyarina; mientras que en Chile se conocen ocho lugares, todos ubicados en la península de Mejillones Zavalaga et al, 2009y Amorós et al, 2010.…”

Section: Introductionunclassified

APORTES A LA CONSERVACIÓN DE Sternula lorata, “GAVIOTÍN PERUANO”, EN LA RESERVA NACIONAL DE PARACAS (RNP), ICA – PERÚ

Amorós

Saravia²

2012

Ecol. apl.

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Resumen Sternula lorata está gravemente amenazada y su población mundial se estima de 1000 a 2499 individuos. La investigación se realizó en la península de Paracas donde se registró un máximo de 605 individuos además de 37 nidos durante la temporada reproductiva 2006-2007. Ambos valores superan los reportados para otras localidades y resaltan la importancia de esta península para la conservación de esta ave. Las amenazas naturales de esta población estuvieron representadas por depredadores potenciales como: Pseudalopex sp., "Zorro"; Falco peregrinus, "Halcón peregrino"; Buteo polyosoma, "Aguilucho común"; y Cathartes aura, "Gallinazo cabeza roja". Por otro lado, las amenazas antrópicas incluyeron la propuesta de desarrollo de actividades no compatibles con la conservación del lugar y el tránsito vehicular. En base a estos hallazgos se recomienda el desarrollo de estrategias participativas para lograr la conservación de esta especie amenazada al interior de la península de Paracas, así como también sumar esfuerzos para su conservación a lo largo de todo el ámbito de su distribución.

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Waterbird Response to Changes in Habitat Area and Diversity Generated by Rainfall in a SW Atlantic Coastal Lagoon

et al. 2007

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The rainfall regime of the Pampas region of Argentina shows a long-term cyclic behavior that has increased in intensity over the historical mean during the last four decades. In this paper we explored the effects of changes in monthly cumulative rainfall on lagoon and riparian habitat, and, in turn on the wetland waterbird community. We also explored the responses of waterbird morphofunctional groups to fluctuation in water level and habitat diversity caused by the change in rainfall at the Mar Chiquita Coastal Lagoon, Argentina (37°32' to 37°45'S, 57°19' to 57°26'W). Analysis of satellite images shows that increases in rainfall increased wetland water surface, but reduced riparian habitat area and habitat diversity. Increases in water surface negatively affected the abundances and species richness of waterbirds; habitat diversity did not explain a significant portion of total waterbird variability. Shorebirds (i.e., yellowlegs, plover, sandpiper) were the most affected by reduction in mudflats and habitat diversity. Other waterbirds (i.e., long-legged wading birds, waterfowls) were affected by increases in water surface (ducks, swans, long-legged waterbirds and gulls), decrease in mudflat availability (long-legged waterbirds and gulls), and decrease in habitat diversity (ducks). Our results show that the inter-annual variability in the rainfall pattern influenced the presence and abundance of most waterbirds, and species richness and composition. Fluctuation in water depth per se is known to be a key factor for habitat use of many waterbirds, but habitat diversity also needs to be considered.

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Breeding Observations of the Peruvian Tern in Chile

Cited by 9 publications

References 1 publication

Current status of Peruvian Terns Sternula lorata in Perú: threats, conservation and research priorities

Current status of Peruvian Terns Sternula lorata in Perú: threats, conservation and research priorities

APORTES A LA CONSERVACIÓN DE Sternula lorata, “GAVIOTÍN PERUANO”, EN LA RESERVA NACIONAL DE PARACAS (RNP), ICA – PERÚ

Waterbird Response to Changes in Habitat Area and Diversity Generated by Rainfall in a SW Atlantic Coastal Lagoon

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