Articles de revues : « Pluvialis squatarola »

1

Uhlig, Rolf. « Zum Zug des Kiebitzregenpfeifers,Pluvialis squatarola, in Bulgarian ». Zoology in the Middle East 5, n^o 1 (janvier 1991) : 21–24. http://dx.doi.org/10.1080/09397140.1991.10637599.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

2

Minton, Clive D. T., et Lorenzo Serra. « Biometrics and moult of Grey Plovers, Pluvialis squatarola, in Australia ». Emu - Austral Ornithology 101, n^o 1 (mars 2001) : 13–18. http://dx.doi.org/10.1071/mu00057.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

3

Pineda-López, Rubén, et Alejandro Arellano-Sanaphre. « Noteworthy records of aquatic birds in the state of Querétaro, Mexico ». Huitzil Revista Mexicana de Ornitología 11, n^o 2 (1 juillet 2010) : 49–59. http://dx.doi.org/10.28947/hrmo.2010.11.2.115.

Texte intégral

Résumé :

Se realizó un muestreo sistemático durante dos años de las aves acuáticas del estado de Querétaro, México. Veintinueve especies se adicionan a la lista oficial de especies para el estado, nueve de las cuales tienen pocos registros en el interior del país: Dendrocygna autumnalis, D. bicolor, Lophodytes cucullatus, Gavia immer, Pluvialis squatarola, Charadrius semipalmatus, Numenius phaeopus, Limosa haemastica y Thalasseus maximus.

Styles APA, Harvard, Vancouver, ISO, etc.

4

Wong, P. L., et R. C. Anderson. « Skrjabinoclava bartlettae n.sp. (Nematoda : Acuarioidea) from the black-bellied plover (Pluvialis squatarola (L.)) (Charadriiformes : Charadriidae) ». Canadian Journal of Zoology 66, n^o 10 (1 octobre 1988) : 2262–64. http://dx.doi.org/10.1139/z88-335.

Texte intégral

Résumé :

Skrjabinoclava bartlettae n.sp. from black-bellied plover (Pluvialis squatarola (L.)) is described. The new species is most similar to Skrjabinoclava wilsoniae Wong and Anderson, 1988 and Skrjabinoclava semipalmatae Wong and Anderson, 1988 but can be distinguished from them by the longer spicules, the rounded cuticle surrounding the tip of the left spicule, and the lateral V-shaped sclerotized band and nipple-like tip of the right spicule.

Styles APA, Harvard, Vancouver, ISO, etc.

5

Cabral, Susanna A. S., Severino M. de Azevedo Júnior et Maria Eduarda de Larrazábal. « Abundância sazonal de aves migratórias na Área de Proteção Ambiental de Piaçabuçu, Alagoas, Brasil ». Revista Brasileira de Zoologia 23, n^o 3 (septembre 2006) : 865–69. http://dx.doi.org/10.1590/s0101-81752006000300033.

Texte intégral

Résumé :

Todos os anos milhares de aves limícolas e migratórias invernam ao longo da costa da América do Sul, entre setembro e abril, onde adquirem massa corpórea e realizam mudas para retornar aos sítios de reprodução. Estudos quali-quantitativos foram realizados na Área de Proteção Ambiental de Piaçabuçu, Alagoas, Brasil, através da contagem direta, objetivando o acompanhamento das flutuações sazonais da avifauna migrante. Foram registradas cinco espécies da família Charadriidae: Vanellus chilensis (Wagler, 1827); Pluvialis squatarola (Linnaeus, 1758); Charadrius semipalmatus Bonaparte, 1825; Charadrius collaris Vieillot, 1818 e Charadrius wilsonia (Ord, 1814) e cinco espécies da família Scolopacidae: Arenaria interpres (Linnaeus, 1758); Actitis macularius (Linnaeus, 1766); Catoptrophorus semipalmatus (Gmelin, 1789); Calidris pusilla (Linnaeus, 1766) e Calidris alba (Pallas, 1764). Pluvialis squatarola, Charadrius semipalmatus, Charadrius collaris, Arenaria interpres, Calidris pusilla e Calidris alba foram consideradas constantes (presentes em mais de 50% das observações). Charadrius semipalmatus e Calidris alba apresentaram os maiores índices de freqüência de ocorrência nos meses de novembro e dezembro e, março e setembro, respectivamente. A correlação de Spearman demonstra uma forte dependência na migração destas espécies. A fidelidade dessas aves a APA de Piaçabuçu observada nessa pesquisa indica ser a área um sítio de invernada, reforçando sua importância para a conservação das espécies migratórias que utilizam o local.

Styles APA, Harvard, Vancouver, ISO, etc.

6

Ding, Jingjing, Ruen Qian, Deyun Tai, Wenjia Yao, Chaochao Hu et Qing Chang. « The complete mitochondrial genome of grey plover Pluvialis squatarola (Charadriiformes, charadriidae) ». Mitochondrial DNA Part B 5, n^o 3 (2 juillet 2020) : 2738–39. http://dx.doi.org/10.1080/23802359.2020.1787892.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

7

Serra, Lorenzo. « Duration of primary moult affects primary quality in Grey Plovers Pluvialis squatarola ». Journal of Avian Biology 32, n^o 4 (décembre 2001) : 377–80. http://dx.doi.org/10.1111/j.0908-8857.2001.320415.x.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

8

SERRA, LORENZO, NIGEL A. CLARK et JACQUIE A. CLARK. « Primary moult, body mass and migration of Grey Plovers Pluvialis squatarola in Britain ». Ibis 148, n^o 2 (13 avril 2006) : 292–301. http://dx.doi.org/10.1111/j.1474-919x.2006.00532.x.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

9

Pearson, David J., Lorenzo Serra et W. R. J. Dean. « Biometrics, moult and migration of Grey Plovers,Pluvialis squatarola, at Mida Creek, Kenya ». Ostrich 73, n^o 3-4 (septembre 2002) : 143–46. http://dx.doi.org/10.1080/00306525.2002.11446744.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

10

Hudeček, Jiří J. « The case of historical breeding of Black-Bellied Plover (Pluvialis squatarola) in Central Europe ». Acta Musei Silesiae, Scientiae Naturales 66, n^o 3 (20 décembre 2017) : 231–35. http://dx.doi.org/10.1515/cszma-2017-0025.

Texte intégral

Résumé :

Abstract Black-Bellied Plover (Pluvialis squatarola), is a species breeding in the arctic tundra; in Europe only in Siberian peninsulas on the Russian territory. There is not enough evidence about its historical breeding in Central Europe. Jan Pícha discovered the breeding of Black-Bellied Plover somewhere in Budějovice basin in south Bohemia, possible in the years 1906-1926, possible on the ponds Dvořiště or Volešek. He wrote about in to M. Záleský (visited) and J. Jirsík (in correspondence), and this report has been totally forgotten. Quite approved is Píchaʼs record of Spotted Redshankʼs (Tringa erythropus) breeding; Píchaʼs personality and reliability ensure the correctness of his report. Mating behaviour of Black-Bellied Plover, recorded in South Bohemia also in 1993.

Styles APA, Harvard, Vancouver, ISO, etc.

11

Lok, C. Martin, et Jaap A. J. Vink. « Trends and Fluctuations in Bird Populations on the Tundra at Cambridge Bay, Nunavut ». Canadian Field-Naturalist 126, n^o 2 (28 novembre 2012) : 111. http://dx.doi.org/10.22621/cfn.v126i2.1325.

Texte intégral

Résumé :

Bird observations from the Cambridge Bay area on Victoria Island, Nunavut, in the summer of 2011 are presented and compared with those from the 1960s and 1980s. A total of 38 species was observed, compared with 42 in 1983 and 47 in 1986. Abundance of species of the High Arctic, such as Black Brant, Branta bernicla nigricans, Black-bellied Plover, Pluvialis squatarola, and Baird’s Sandpiper, Calidris bairdii, decreased, whereas numbers of the Red-necked Phalarope, Phalaropus lobatus, usually associated with the Low Arctic, increased markedly. Overall, the number of each species observed is rather stable and, for several species, the relative abundance does not seem to have changed significantly.

Styles APA, Harvard, Vancouver, ISO, etc.

12

Serra, L., D. A. Whitelaw, A. J. Tree et L. G. Underhill. « Biometrics, possible breeding origins and migration routes of South African Grey Plovers, Pluvialis squatarola ». Ostrich 72, n^o 3-4 (septembre 2001) : 140–44. http://dx.doi.org/10.2989/00306520109485305.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

13

TURPIE, JANE K., et PHILIP A. R. HOCKEY. « Adaptive variation in the foraging behaviour of Grey Plover Pluvialis squatarola and Whimbrel Numenius phaeopus ». Ibis 139, n^o 2 (28 juin 2008) : 289–98. http://dx.doi.org/10.1111/j.1474-919x.1997.tb04627.x.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

14

Michaud, Guy, et J. Ferron. « Sélection des proies par quatre espèces d'oiseaux limicoles (Charadrii) de passage dans l'estuaire du Saint-Laurent lors de la migration vers le sud ». Canadian Journal of Zoology 68, n^o 6 (1 juin 1990) : 1154–62. http://dx.doi.org/10.1139/z90-171.

Texte intégral

Résumé :

The diet of four shorebird species, the Black-bellied Plover (Pluvialis squatarola), Semipalmated Plover (Charadrius semipalmatus), Lesser Yellowlegs (Tringa flavipes), and Semipalmated Sandpiper (Calidris pusilla), was studied on an intertidal mudflat during their southward migration. Mollusks dominate the invertebrate fauna in the feeding area, representing 95% of the organisms in terms of number and biomass. The predatory shorebirds appeared to forage selectively on polychaetes and crustaceans, which represent only 5% of the benthic invertebrates in the feeding area. Lesser Yellowlegs eat nearly exclusively crustaceans. The other three predators feed mainly on Nereis virens and all three select groups of worms that differ significantly by their size, the larger predators consuming the biggest prey. Despite the simultaneous presence of the four predators on the feeding area, they seem to share the resources without overt interspecific competition.

Styles APA, Harvard, Vancouver, ISO, etc.

15

Güitrón López, María Marcela, et Francisco Martín Huerta Martínez. « Nuevos registros de aves acuáticas para el interior del Estado de Jalisco : caso Laguna de Sayula, México ». Acta Universitaria 28, n^o 6 (7 février 2019) : 14–19. http://dx.doi.org/10.15174/au.2018.1945.

Texte intégral

Résumé :

El conocimiento de la avifauna en México, es el resultado de muchos años de exploraciones en áreas específicas, sin embargo a pesar del esfuerzo realizado, en algunas regiones de México aún se desconoce su composición y distribución; tal es el caso de los humedales continentales, los cuales representan sitios de invernada y de paso migratorio para una gran variedad de aves acuáticas y terrestres del Neártico, así como sitios de reproducción para especies residentes. Se destacan observaciones realizadas en el Sitio Ramsar Laguna de Sayula, resultado de un estudio avifaunístico a largo plazo con muestreos mensuales durante cinco periodos de migración. Se reportan seis nuevos registros para el humedal y algunos para el interior del estado (Dendrocygna autumnalis, Branta canadensis, Sula leucogaster, Pelecanus occidentalis, Pluvialis squatarola y Charadrius semipalmatus) y se informa la presencia de Anser albifrons y Anser rossii con pocos registros publicados para la zona.

Styles APA, Harvard, Vancouver, ISO, etc.

16

Townshend, D. J. « Decisions for a Lifetime : Establishment of Spatial Defence and Movement Patterns by Juvenile Grey Plovers (Pluvialis squatarola) ». Journal of Animal Ecology 54, n^o 1 (février 1985) : 267. http://dx.doi.org/10.2307/4637.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

17

Turpie, Jane K. « Non-Breeding Territoriality : Causes and Consequences of Seasonal and Individual Variation in Grey Plover Pluvialis squatarola Behaviour ». Journal of Animal Ecology 64, n^o 4 (juillet 1995) : 429. http://dx.doi.org/10.2307/5646.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

18

Ribeiro, Pablo D., Oscar O. Iribarne, Luciano Jaureguy, Diego Navarro et Eugenia Bogazzi. « Variable sex-specific mortality due to shorebird predation on a fiddler crab ». Canadian Journal of Zoology 81, n^o 7 (1 juillet 2003) : 1209–21. http://dx.doi.org/10.1139/z03-102.

Texte intégral

Résumé :

Male fiddler crabs compete for access to mates mainly by displaying an enlarged claw. One cost of this large claw is presumed to be higher exposure to predators. The fiddler crab Uca uruguayensis is used as a food source by several Neotropical migratory shorebirds. We investigated whether crab density and male claw-waving behaviour increase predation by shorebirds. The sex ratio of crabs on the surface was strongly male biased. Male crabs showed a daily succession of feedingwavingfeeding activities and their dry mass at the site decreased with a high density of crabs, suggesting stronger malemale competition than at sites with a low density of crabs. Sex-specific predation varied according to shorebird species. The Ruddy Turnstone (Arenaria interpres) preyed intensively on male crabs when they were courting and at sites with a high density of crabs, the Black-bellied Plover (Pluvialis squatarola) and the Lesser Golden Plover (Pluvialis dominica) preyed on crabs of both sexes, and the Whimbrel (Numenius phaeopus) foraged intensively on females. When estimating the net effect of all predators, we found that the four shorebird species together were able to consume between 0.1 and 0.2% of the crab population, and consumption did not differ between the sexes of crabs. These mortality rates indicate a low source of mortality, likely unable to produce deviations in the sex ratio of the population. Thus, our results indicate that a trait thought to be sexually selected does not necessarily lead to a disproportionate increase in mortality due to predation.

Styles APA, Harvard, Vancouver, ISO, etc.

19

Exo, Klaus-Michael, Pete H. Becker et Ute Sommer. « Organochlorine and mecury concetrations in eggs of grey plovers (Pluvialis squatarola) breeding in the Lena Dlta, north-east Sibveria, 1997 ». Polar Research 19, n^o 2 (décembre 2000) : 261–65. http://dx.doi.org/10.1111/j.1751-8369.2000.tb00348.x.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

20

CONNOLLY, LINDA M., et MARK A. COLWELL. « Comparative use of longline oysterbeds and adjacent tidal flats by waterbirds ». Bird Conservation International 15, n^o 3 (septembre 2005) : 237–55. http://dx.doi.org/10.1017/s0959270905000420.

Texte intégral

Résumé :

Commercial oyster Crassostrea spp. cultivation in intertidal habitats may degrade foraging habitat of waterbirds. Consequently, we compared species abundances, community similarity and diversity of waterbirds using longline oyster culture beds and adjacent control plots on tidal flats of Humboldt Bay, California. Abundances of most species differed significantly between treatments, with seven of 13 shorebirds Charadriiformes and three of four wading birds Ciconiiformes more abundant on longline plots. By contrast, Black-bellied Plover Pluvialis squatarola were more abundant on control plots. Marbled Godwit Limosa fedoa, Long-billed Curlew Numenius americanus and Dunlin Calidris alpina showed mixed results depending on location and Great Blue Heron Ardea herodias were more abundant only on one control plot. Community composition was similar on longline and control plots, although diversity (H′) was greater on longline plots. Varying species' responses to longline techniques may have been associated with interspecific differences in diet and foraging behaviour, and the impacts of longlines and oyster-harvesting on prey distribution. Overall, longlines did not negatively affect the foraging behaviour of most species, but the underlying causes for increased bird use may lead to impacts on other trophic levels and over a longer temporal scale.

Styles APA, Harvard, Vancouver, ISO, etc.

21

Iribarne, Oscar O., et Mariano M. Martinez. « Predation on the Southwestern Atlantic Fiddler Crab (Uca uruguayensis) by Migratory Shorebirds (Pluvialis dominica, P. squatarola, Arenaria interpres, and Numenius phaeopus) ». Estuaries 22, n^o 1 (mars 1999) : 47. http://dx.doi.org/10.2307/1352926.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

22

Wong, P. L., et R. C. Anderson. « Ancyracanthopsis winegardi n.sp. (Nematoda : Acuarioidea) from Pluvialis squatarola (Aves : Charadriidae) and Ancyracanthus heardi n.sp. from Rallus longirostris (Aves : Rallidae), and a review of the genus ». Canadian Journal of Zoology 68, n^o 6 (1 juin 1990) : 1297–306. http://dx.doi.org/10.1139/z90-194.

Texte intégral

Résumé :

Ancyracanthopsis winegardi n.sp. from under the koilin lining of the gizzard of Pluvialis squatarola (L.) can be distinguished by its ptilina which extend from the dorsoventral sides of the oral opening to the lateral sides; each ptilinum is divided into four lobes. In addition, the left spicule has a narrow process forming a truncated distal end and the right spicule has a conical protuberance on the left side near the distal end. Evidence is presented that fiddler crabs (Uca spp.) may serve as intermediate hosts of A. winegardi in the Gulf coast. Ancyracanthopsis heardi n.sp. from under the koilin lining of the gizzard of Rallus longirostris Boddaert can be distinguished by its ptilina which extend from the dorsoventral sides of the oral opening to the lateral sides; each ptilinum is divided into five or six serrations. In addition, the distal end of the left spicule is flat and expanded dorsally, and the right spicule is crescent-shaped and markedly tapered. Ancyracanthopsis now comprises eight known species, four occurring in the New World (i.e., A. coronata (Molin, 1860a); A. quadripartita (Clapham, 1945); A. winegardi n.sp.; A. heardi n.sp.), three in the Old World (i.e., A. parvialatus (Belopolskaya, 1953); A. petrovi Guschanskaya, 1950; A. schikhobalovi (Guschanskaya, 1950)), and one in Asia (A. buckleyi Ali, 1971).

Styles APA, Harvard, Vancouver, ISO, etc.

23

TURPIE, JANE K., et PHILIP A. R. HOCKEY. « Comparative diurnal and nocturnal foraging behaviour and energy intake of premigratory Grey Plovers Pluvialis squatarola and Whimbrels Numenius phaeopus in South Africa ». Ibis 135, n^o 2 (3 avril 2008) : 156–65. http://dx.doi.org/10.1111/j.1474-919x.1993.tb02827.x.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

24

Allen Smith, Paul, H. Grant Gilchrist et James N. M. Smith. « Effects of Nest Habitat, Food, and Parental Behavior on Shorebird Nest Success ». Condor 109, n^o 1 (1 février 2007) : 15–31. http://dx.doi.org/10.1093/condor/109.1.15.

Texte intégral

Résumé :

Abstract Abstract In environments such as arctic tundra, where bird densities are low and habitats are comparatively homogeneous, suitable nest sites likely are not limited. Under these conditions, reproductive success of birds may be determined by factors other than the habitat characteristics of nest sites. We studied the relative influence of nest habitat, food, nest distribution, and parental behavior on the reproductive success of tundra-breeding shorebirds at East Bay, Southampton Island, Nunavut, Canada. From 2000 to 2002, we monitored the nests of five species: Black-bellied Plover (Pluvialis squatarola), Semipalmated Plover (Charadrius semipalmatus), Ruddy Turnstone (Arenaria interpres), White-rumped Sandpiper (Calidris fuscicollis), and Red Phalarope (Phalaropus fulicarius). For each species, habitat differed between nest sites and random sites. In contrast, habitat differed between successful and failed nest sites only for White-rumped Sandpipers. Shorebirds did not prefer to nest in habitats where food was most abundant. Although nest success varied among species in all years, artificial nest experiments suggested that interspecific variation in predation rate was not related to habitat type. Instead, the marked interspecific variation in nest success may have been related to incubation behavior. Species taking fewer incubation recesses had higher nest success, although these results should be viewed as preliminary. The factor with the greatest interannual influence on nest success was fluctuating predation pressure, apparently related to the abundance of predators and lemmings.

Styles APA, Harvard, Vancouver, ISO, etc.

25

Turcotte, Yves, Jean-Francois Lamarre et Joel Bety. « Annual and Seasonal Variation in Shorebird Abundance in the St. Lawrence River Estuary during Fall Migration ». Canadian Field-Naturalist 131, n^o 3 (28 février 2018) : 203–14. http://dx.doi.org/10.22621/cfn.v131i3.1870.

Texte intégral

Résumé :

Many north American shorebird populations are declining. it is therefore urgent to identify major sites used during their annual cycle to achieve effective conservation measures. our objective was to expand some aspects of the knowledge base needed to assess the ecological value of the St. Lawrence River Estuary for shorebird conservation. Here, we present the results of the most intensive shorebird survey ever conducted in the St. Lawrence River Estuary during fall migration. Surveys were conducted between St-Jean-Port-Joli and St-Simon-sur-Mer, Quebec, Canada, in 2011 and 2012, from late June/early July through late november, corresponding to the migration period of all species potentially present in the study area. The Semipalmated Sandpiper (Calidris pusilla) was one of the two most abundant species during both years of our study (most abundant species, followed by Dunlin [Calidris alpina] and Black-bellied Plover [Pluvialis squatarola] in 2011; second to Blackbellied Plover in 2012). Considering the entire shorebird community, abundance of individuals peaked in early September. Peak abundance occurred earlier for adults than for juveniles. For most species, juveniles largely outnumbered adults. Juveniles were relatively less abundant in 2012 than in 2011. This reflected a general trend observed in northeastern north America between those years, suggesting a lower breeding success in 2012. Given its importance as a staging site for juvenile birds (study area used annually by up to a few hundred thousand shorebirds) and therein, its conservation value, we recommend that the St. Lawrence River Estuary should be included within the Western Hemisphere Shorebird Reserve network.

Styles APA, Harvard, Vancouver, ISO, etc.

26

Wong, P. L., et R. C. Anderson. « Distribution of gizzard nematodes (Habronematoidea, Acuarioidea) of New World shorebirds (Charadriiformes), with special reference to localities of transmission ». Canadian Journal of Zoology 69, n^o 10 (1 octobre 1991) : 2579–88. http://dx.doi.org/10.1139/z91-364.

Texte intégral

Résumé :

Eleven species of gizzard nematodes were found in 27 of 41 (66%) species of the Charadriidae, Haematopodidae, Recurvirostridae, and Scolopacidae. They were found mainly in large shorebirds, possibly because they use large crustaceans (e.g., decapods) as intermediate hosts. The presence of identifiable larvae indicated that five species are transmitted in marine environments: (1) Stellocaronema skrjabini, found in 15 shorebird species, is transmitted on the Pacific and Gulf coasts of the United States and Peru; (2) Schistorophus skrjabini, found in three shorebird species, is transmitted on the Pacific and Gulf coasts of the United States; (3) Sciadiocara umbellifera, found in nine shorebird species, is transmitted along the coasts of Texas and Peru; (4) Viktorocara capillaris, found in six shorebird species, is transmitted on the Pacific and Gulf coasts of the United States; (5) Viktorocara limosae, found in 13 shorebird species, is transmitted on the Pacific coast of the United States. Acuaria sp. was found in two long-billed curlews (Numenius americanus) breeding in Alberta and one sanderling (Calidris alba) wintering in Peru. Streptocara sp. was found in four shorebird species, and the presence of larvae in a willet (Catoptrophorus semipalmatus) indicated that transmission takes place in Alberta. Chevreuxia americana, found in six shorebird species, was most common in American avocets (Recurvirostra americana) and black-bellied plovers (Pluvialis squatarola). Sciadiocara bihamata was found in four shorebird species but was most common in black-bellied plovers. Sciadiocara cucullatus was found in one long-billed curlew collected in Texas. Sobolevicephalus lichtenfelsi was found in marbled godwits (Limosa fedoa) and willets.

Styles APA, Harvard, Vancouver, ISO, etc.

27

Glazov, Petr M., Julia A. Loshchagina, Alexander V. Kondratyev, Elmira M. Zaynagutdinova, Helmut Kruckenberg et Ivan G. Pokrovsky. « The Long-Term Monitoring of Bird Populations on Kolguev Island in the Barents Sea ». ARCTIC 74, n^o 5 (10 novembre 2021) : 23–40. http://dx.doi.org/10.14430/arctic73845.

Texte intégral

Résumé :

Kolguev Island (69˚05′ N 49˚15′ E) is located in the Pechora Sea, the southeastern part of the Barents Sea. The island’s ecosystem is unusual due to the total absence of rodents and specialized predators such as weasels, while non-specialized predators such as Arctic (Vulpes lagopus) and red (V. vulpes) foxes and Rough-legged Hawk (Buteo lagopus) are common. Currently, 111 bird species have been registered here, of which 58 are nesting. The absence of rodents and the relatively stable predation pressure have resulted in the high abundance of many bird species: Willow Ptarmigan (Lagopus lagopus), several goose species, some waders, and passerines. Over the 125-year history of ornithological studies on Kolguev, the island avifauna has changed significantly. The trend of an increase in the proportion of widespread and Siberian species together with a decrease in the proportion of Arctic species was observed. Since 2006, a thorough monitoring of Kolguev avifauna has been carried out, during which the dynamics of the bird population densities have been traced. The abundance of Black-bellied Plover (Pluvialis squatarola) and Dunlin (Calidris alpina) decreased, while the numbers of Barnacle Goose (Branta leucopsis) have increased sharply since the 1980s. The breeding density of Rough-legged Hawk has also increased in recent years. The long-term monitoring of Kolguev ecosystems has indicated the high international conservation value of the island due to the high breeding density of many bird species. Our study, covering more than a century of avifaunal studies with almost annual monitoring over the past three decades, provides an unusually long and detailed time-series for an Arctic island.

Styles APA, Harvard, Vancouver, ISO, etc.

28

Evans-Ogden, Lesley J., Shabtai Bittman et David B. Lank. « A review of agricultural land use by shorebirds with special reference to habitat conservation in the Fraser River Delta, British Columbia ». Canadian Journal of Plant Science 88, n^o 1 (1 janvier 2008) : 71–83. http://dx.doi.org/10.4141/p06-137.

Texte intégral

Résumé :

Many estuaries worldwide are important habitats for shorebirds. Agricultural fields adjacent to food-rich intertidal areas can provide roosting and feeding habitat, particularly at high tide. The Fraser River Delta (FRD) contains rich agricultural land and is Canada’s most important non-breeding site for shorebirds. We review and synthesize recent studies that have investigated agricultural land as non-breeding habitat for shorebirds in the FRD using radio-tracking, day-time and night-time surveys, stable isotope analysis of blood samples, examination of prey in stomach and faecal samples, and farmer surveys regarding field management. The three primary shorebirds studied in the FRD were dunlin (Calidris alpina pacifica), black-bellied plover (Pluvialis squatarola), and killdeer (Charadrius vociferus). Field use is mainly nocturnal for dunlin, but diurnal for black-bellied plovers and killdeer. Dunlin and black-bellied plovers mainly use bare or winter cover crop fields, preferring short cover. Killdeer mainly use berry and winter vegetable fields. All species prefer fields recently manured, fertilized, or laser levelled. Day length and precipitation influenced field use. Stable isotope analysis (δ13C, δ 15N) of dunlin blood indicates that approximately 38% of dunlin diet is obtained from agricultural habitat. Younger birds have a higher terrestrial contribution to diet (~43%) than adults (~35%). Dunlin prey includes agricultural pest species such as leatherjacket (Tipulidae) larvae and wireworm (Agriotes spp.). Coastal agricultural land with diverse crop types benefits shorebirds, and its loss may negatively impact fitness, especially for juveniles. Research conducted in the FRD shows the importance of farmland for wintering shorebirds and suggests conservation and management strategies to preserve and enhance the wildlife value of this agricultural habitat. Key words: Farmland, agricultural land, shorebirds, Fraser River Delta, management, wildlife conservation

Styles APA, Harvard, Vancouver, ISO, etc.

29

Cañizares, Jessica R., et J. Michael Reed. « Identification of priority shorebird conservation areas in the Caribbean ». PeerJ 8 (8 septembre 2020) : e9831. http://dx.doi.org/10.7717/peerj.9831.

Texte intégral

Résumé :

Despite being geographically central to the Atlantic Americas Flyway for migratory birds, the Caribbean is often overlooked or underappreciated when addressing the conservation of North American shorebirds. To our knowledge, this is the first Caribbean-wide assessment of shorebird use in the region. We analyzed 211,013 shorebird species observations in the insular Caribbean from 2010–2019, representing 78,794 eBird checklists and cumulative total of 2.1 million shorebirds of 45 species. We conclude that priority areas for shorebird conservation include Humedal Sur de Pinar del Río (Humedal Sur de Los Palacios) in Cuba, and Monte Cristi in the Dominican Republic as they each likely support more than 20,000 shorebirds annually, and they host large abundances of geographic populations for particular taxa. Specifically, the former site hosts >10% of Short-billed Dowitchers (Limnodromus griseus griseus/hendersoni), and >1% of Black-bellied Plovers (Pluvialis squatarola cynosurae) and Wilson’s Plovers (Charadrius wilsonia wilsonia), while the latter site supports large numbers of Black-necked Stilts (Himantopus mexicanus). We also identified at least 15 additional sites that likely cross the 1% population threshold for one or more shorebird taxa. These sites may qualify for special international designations such as Important Bird and Biodiversity Areas or as part of the Western Hemisphere Shorebird Reserve Network; 11 of the 17 sites we identified do not hold either of these titles. Data on subspecific or geographic distributions of three species, Snowy Plover (C. nivosus), Black-necked Stilt, and Killdeer (C. vociferous), are insufficient to reveal if the sites with the highest abundances were mostly comprised of Caribbean populations or migrants, but the limited information suggests that they also likely exceed 1% thresholds on several islands. Based on our results, we recommend more extensive systematic surveys of shorebirds in the Caribbean, including research on turnover rates and movements between islands, as well as assimilation of shorebird survey data not yet included in the eBird portal.

Styles APA, Harvard, Vancouver, ISO, etc.

30

Wong, P. L., et R. C. Anderson. « Host and geographic distribution of Skrjabinoclava spp. (Nematoda : Acuarioidea) in Nearctic shorebirds (Aves : Charadriiformes), and evidence for transmission in marine habitats in staging and wintering areas ». Canadian Journal of Zoology 68, n^o 12 (1 décembre 1990) : 2539–52. http://dx.doi.org/10.1139/z90-355.

Texte intégral

Résumé :

Twelve species of shorebirds belonging to the families Charadriidae (N = 3) and Scolopacidae (N = 9) were infected with 11 species of Skrjabinoclava and there was little overlap of parasites between these two families of birds. Most Skrjabinoclava spp. are transmitted apparently in marine staging and (or) wintering areas of their hosts, as indicated by the presence of larval stages of six species. There was no evidence that transmission occurs on the breeding grounds in freshwater habitats. Skrjabinoclava tupacincai, found predominantly in sanderlings (Calidris alba (Pallas)), is transmitted on the Pacific (Washington, California, Chile) and Atlantic coasts (New Jersey) in winter and the Gulf of Mexico (Florida and Texas) in winter and spring. Skrjabinoclava myersi was found, with a single exception, only in sanderlings, and transmission is apparently restricted to coastal Washington and California in winter. Skrjabinoclava bakeri, found predominantly in western sandpipers (Calidris mauri Cabanis), is transmitted on the Pacific coast (California) and in the Gulf of Mexico in winter. Skrjabinoclava morrisoni and Skrjabinoclava pusillae were found mainly in semipalmated sandpipers (Calidrispusilla (L.)). Both parasites are transmitted in the Gulf of Mexico in spring, but S. morrisoni is also transmitted in the Bay of Fundy in fall. Skrjabinoclava inornatae, found mainly in willets (Catoptrophorus semipalmatus (Gmelin)), is transmitted in Louisiana, Texas, and Peru in winter. Skrjabinoclava kritscheri was found only in marbled godwits (Limosafedoa (L.)), and it is suggested that infected birds collected in southern Alberta in spring acquired their infections while wintering along the Pacific coast of the United States. Skrjabinoclava hartwichi, found in black turnstones (Arenaria melanocephala (Vigors)) wintering in California and ruddy turnstones (Arenaria interpres (L.)) wintering in Peru, is transmitted along the Pacific coast of North America. Skrjabinoclava semipalmatae was found in semipalmated plovers (Charadrius semipalmatus Bonaparte) wintering in California. Skrjabinoclava wilsoniae was found in Wilson's plover (Charadrius wilsonia Ord) wintering in Texas and in a black-bellied plover (Pluvialis squatarola (L.)) migrating through southern Alberta in spring. Skrjabinoclava bartlettae was found in black-bellied plovers collected in southern Alberta in spring and Louisiana in winter.

Styles APA, Harvard, Vancouver, ISO, etc.

31

LEI, WEIPAN, JOSÉ A. MASERO, THEUNIS PIERSMA, BINGRUN ZHU, HONG-YAN YANG et ZHENGWANG ZHANG. « Alternative habitat : the importance of the Nanpu Saltpans for migratory waterbirds in the Chinese Yellow Sea ». Bird Conservation International 28, n^o 4 (17 septembre 2018) : 549–66. http://dx.doi.org/10.1017/s0959270917000508.

Texte intégral

Résumé :

SummaryThe natural coastal wetlands of the East Asian-Australasian Flyway (EAAF) are disappearing at alarming rates, leading to rapid declines of many populations of waterbirds in the most species-rich flyway in the world. The identification and assessment of possible alternative habitats that may buffer the loss of natural wetlands should, therefore, be a priority for the conservation of migratory waterbirds using this flyway. Coastal saltpans are functional wetlands that support large numbers of waterbirds worldwide. The Nanpu Saltpans in the northern Bohai Bay of the Yellow Sea in China are one of the largest (290 km2) saltpan complexes in the world. In this paper, we document the value of the Nanpu Saltpans for supporting waterbirds. The surveys, carried out from 2013 to 2016, included waterbird counts in the saltpans (93 km2) at high and low tide and on the adjacent natural tidal flats (57 km2) at low tide. Of the 89 waterbird species recorded, 27 had maximum counts exceeding the 1% threshold value of estimated flyway populations. The maximum counts of waterbirds in northward migration and southward migration in the Nanpu Saltpans were 96,000 and 93,500, respectively, including both foraging and roosting birds; these figures do not account for turnover, so the total number of birds using the site is likely to be higher. The maximum counts on the adjacent tidal flats at low tide amounted to 73,000 and 20,000 waterbirds during northward and southward migration, respectively, and most of them were foraging birds. In the boreal winter, few birds fed in the saltpans, but several thousand fed on the tidal flats. Waterbirds used the inland ponds (2.0–18.0 km from the intertidal area) mainly for feeding both during low tide and high tide and used the nearshore ponds (0.3–4.3 km from the intertidal area) mainly for high-tide roosting. Some species, such as Black-tailed Godwit Limosa limosa, Marsh Sandpiper Tringa stagnatilis, Pied Avocet Recurvirostra avosetta, and Black-winged Stilt Himantopus himantopus, occurred mainly in the saltpans; other species preferred tidal flats, such as Red Knot Calidris canutus, Great Knot Calidris tenuirostris, Bar-tailed Godwit Limosa lapponica, Eurasian Curlew Numenius arquata, Relict Gull Larus relictus, and Grey Plover Pluvialis squatarola. This study clearly demonstrates the joint ecological function of the Nanpu Saltpan complex and adjacent tidal flats as a key staging area for waterbirds in the EAAF, and as such both urgently warrant protected status.

Styles APA, Harvard, Vancouver, ISO, etc.

32

Paulson, Dennis R. « Black-bellied Plover (Pluvialis squatarola) ». Birds of North America Online, 1 janvier 1995. http://dx.doi.org/10.2173/bna.186.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

33

Poole, Alan F., Peter Pyle, Michael A. Patten et Dennis R. Paulson. « Black-bellied Plover (Pluvialis squatarola) ». Birds of North America Online, 4 novembre 2016. http://dx.doi.org/10.2173/bna.bkbplo.03.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

34

Smith, Rodney, Keith Derrett et Nicholas Tardivel. « Use of the Swale Estuary, SE England, by Grey Plovers Pluvialis squatarola ». Wader Study 123, n^o 3 (1 décembre 2016). http://dx.doi.org/10.18194/ws.00051.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

35

Ribeiro, Pablo D., Diego D. Navarro, Luciano M. Jaureguy, Pedro Daleo et Oscar O. Iribarne. « Evaluating the potential impact of bird predation on the SW Atlantic fiddler crab Leptuca uruguayensis ». Helgoland Marine Research 73, n^o 1 (23 septembre 2019). http://dx.doi.org/10.1186/s10152-019-0527-9.

Texte intégral

Résumé :

Abstract The southernmost permanent population of the fiddler crab Leptuca uruguayensis occurs along the Samborombón Bay (36°22′S, 56°45′W, Argentina), an important feeding site for many bird species, including ruddy turnstones (Arenaria interpres), whimbrels (Numenius phaeopus), grey plovers (Pluvialis squatarola), american golden plovers (Pluvialis dominica) and gull-billed terns (Gelochelidon nilotica). Although all these birds are known to prey on many fiddler crab species worldwide, there is no estimation of their joint predation impacts, probably due to the difficulty in conducting experiments on an appropriate spatial scale. In these situations, computer simulation methods are useful tools. By using Monte Carlo methods and field data, we modeled the decrease of a fiddler crab population due to bird predation. The model found that under current bird occurrences and crab densities, birds do not consume more than 0.03% of the studied fiddler crab populations. Birds only consume more than 10% of the population if crab density is below 0.02 crabs m2, or if bird occurrences are at least 3 orders of magnitude higher than currently observed. Both situations are unlikely, as mean crab density is 140 crabs m2, and bird density is never so high. Furthermore, by monitoring three different fiddler crab patches, we found that bird predation cannot account for temporal density changes, suggesting that other population processes are more important than bird predation. In conclusion, even though fiddler crabs may exhibit strong predator-avoidance behavior, direct lethal effects of bird predation are currently small.

Styles APA, Harvard, Vancouver, ISO, etc.

36

Exo, Klaus-Michael, Franziska Hillig et Franz Bairlein. « Migration routes and strategies of Grey Plovers (Pluvialis squatarola) on the East Atlantic Flyway as revealed by satellite tracking ». Avian Research 10, n^o 1 (2 août 2019). http://dx.doi.org/10.1186/s40657-019-0166-5.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

Articles de revues sur le sujet « Pluvialis squatarola »

Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres