| how many birds does it take to put a flock to flight? | flights from foraging flocks of sanderlings, calidris alba were observed at redcar, northeast england, in order to investigate how individual decisions to fly related to the behaviour of other flock members. flights of sanderlings tended to be either of all birds in the flock on the ground, or of single birds or groups representing only a small proportion of the foraging flock. the latter accounted for the majority of movement events but after weighting by flock size the former accounted for the ... | 1997 | 9521800 |
| avian pox in sanderlings from florida. | asian pox was diagnosed in three sanderlings (calidris alba) on sanibel island, florida (usa) in february 1997. all three cases had large tumor-like lesions which contributed significantly to their mortality. poxvirus infection was confirmed by cytology, histopathology, and electron microscopy. this is the first report of poxvirus infection in sanderlings. | 1999 | 10479096 |
| novel coronavirus and astrovirus in delaware bay shorebirds. | wild birds are an important but to some extent under-studied reservoir for emerging pathogens. we used unbiased sequencing methods for virus discovery in shorebird samples from the delaware bay, usa; an important feeding ground for thousands of migratory birds. | 2014 | 24699424 |
| spring migration stopover ecology of avian influenza virus shorebird hosts at delaware bay. | although low pathogenicity avian influenza viruses (lpaiv) are detected in shorebirds at delaware bay annually, little is known about affected species habitat preferences or the movement patterns that might influence virus transmission and spread. during the 5-wk spring migration stopover period during 2007-2008, we conducted a radiotelemetry study of often-infected ruddy turnstones (arenaria interpres morinella; n = 60) and rarely infected sanderlings (calidris alba; n = 20) to identify locatio ... | 2016 | 27309084 |
| avian influenza virus infection dynamics in shorebird hosts. | to gain insight into avian influenza virus (aiv) transmission, exposure, and maintenance patterns in shorebirds at delaware bay during spring migration, we examined temporal aiv prevalence trends in four charadriiformes species with the use of serial cross-sectional data from 2000 through 2008 and generalized linear and additive models. prevalence of aiv in ruddy turnstones (arenaria interpres morinella) increased after arrival, peaked in mid-late may, and decreased prior to departure. antibody ... | 2012 | 22493108 |
| variation in the innate and acquired arms of the immune system among five shorebird species. | to contribute to an understanding of the evolutionary processes that shape variation in immune responses, we compared several components of the innate and acquired arms of the immune system in five related, but ecologically diverse, migratory shorebirds (ruff philomachus pugnax l., ruddy turnstone arenaria interpres l., bar-tailed godwit limosa lapponica l., sanderling calidris alba pallas and red knot c. canutus l.). we used a hemolysis-hemagglutination assay in free-living shorebirds to assess ... | 2006 | 16391350 |
| influence of age and sex on winter site fidelity of sanderlings calidris alba. | many migratory bird species show high levels of site fidelity to their wintering sites, which confers advantages due to prior knowledge, but may also limit the ability of the individual to move away from degrading sites or to detect alternative foraging opportunities. winter site fidelity often varies among age groups, but sexual differences have seldom been recorded in birds. we studied a population of individually colour-marked sanderlings wintering in and around the tejo estuary, a large estu ... | 2016 | 27703860 |
| prey type and foraging ecology of sanderlings calidris alba in different climate zones: are tropical areas more favourable than temperate sites? | sanderlings (calidris alba) are long-distance migratory shorebirds with a non-breeding range that spans temperate and tropical coastal habitats. breeding in the high arctic combined with non-breeding seasons in the tropics necessitate long migrations, which are energetically demanding. on an annual basis, the higher energy expenditures during migration might pay off if food availability in the tropics is higher than at temperate latitudes. we compared foraging behaviour of birds at a north tempe ... | 2015 | 26290790 |
| a review of mites of the subfamily picobiinae johnston & kethley, 1973 (prostigmata: syringophilidae) from north american birds. | the fauna of ectoparasitic mites of the subfamily picobiinae (acari: syringophilidae) associated with birds of the north america is revised. a new genus, charadriineopicobia n. g. is proposed for two quill mite species, ch. calidris n. sp. from calidris alba (pallas) (charadriiformes: scolopacidae) and ch. leucophaeus (skoracki, hendricks & spicer, 2010) n. comb. from leucophaeus atricilla linnaeus (charadriiformes: laridae). the new genus differs from the closely related neopicobia skoracki, 20 ... | 2014 | 24395579 |
| do uniparental sanderlings calidris alba increase egg heat input to compensate for low nest attentiveness? | birds breeding in cold environments regularly have to interrupt incubation to forage, causing a trade-off between two mutually exclusive behaviours. earlier studies showed that uniparental arctic sandpipers overall spend less time incubating their eggs than biparental species, but interspecific differences in size and ecology were potential confounding factors. this study reports on a within-species comparison of breeding schedules and metal egg temperatures in uni- and biparental sanderlings (c ... | 2011 | 21347377 |
| the use of distal rhynchokinesis by birds feeding in water. | the use of distal rhynchokinesis, which consists of the movement of the distal part of the upper jaw with respect to the cranium, is well documented in long-billed shorebirds (scolopacidae), commonly being associated with the deep probing feeding method. however, the functional and evolutionary significance of distal rhynchokinesis and other cranial kinesis is unclear. we report for the first time the use and occurrence of distal rhynchokinesis in wild long-billed shorebirds feeding on small pre ... | 2007 | 17951416 |
| sanderlings (calidris alba) have a magnetic compass: orientation experiments during spring migration in iceland. | the migratory orientation of sanderlings (calidris alba) was investigated with cage experiments during the spring migration in southwest iceland. sanderlings were exposed to 90 degrees counterclockwise-shifted magnetic fields under both clear skies and natural overcast. clear sky control tests resulted in a northerly mean direction, in agreement with predictions based on ringing recovery data and earlier visual observations of departing flocks. sanderlings closely followed experimental deflectio ... | 2000 | 11003824 |
| corticosterone and growth hormone levels in shorebirds during spring and fall migration stopover. | large numbers of shorebirds stop over at delaware bay during spring migration and undergo major mass increases within a two- to three-week period. we studied plasma levels of corticosterone and growth hormone in three species of migrants that use this site, sanderlings, calidris alba, semipalmated plovers, charadrius semipalmatus, and semipalmated sandpipers, calidris pusilla. semipalmated sandpipers were also studied at a fall migration stopover in manomet, massachusetts. these two hormones wer ... | 1999 | 10531551 |
| the relative importance of prey availability and intruder pressure in feeding territory size regulation by harriers, circus cyaneus. | the relative importance of prey availability and intruder pressure in the regulation of harrier (circus cyaneus) territory size was investigated over two years using analytical methods chosen to permit comparison with myers et al. (1979) study of sanderlings (calidris alba). relationships between territory area and two variables, prey type (mice; large, medium, and small birds) and intruder type (conspecific neighbors, conspecific floaters, and heterospecific floaters), and the consistency of th ... | 1987 | 28312003 |
| organochlorine contamination in shorebirds from washington state and the significance for their falcon predators. | arctic-breeding shorebirds collected in western washington state during winter and spring, and a comparative sample collected in coastal california during the winter were analyzed for organochlorine contaminants to determine the potential impact of these residues on populations of peregrine falcons (falco peregrinus) and merlins (f. columbarius) which prey upon shorebirds in western washington. dunlins (calidris alpina), an important winter prey for falcons in western washington, were collected ... | 1987 | 24254183 |
| heavy metals and selenium in feathers of three shorebird species from delaware bay. | concentrations of lead, cadmium, mercury, selenium, chromium and manganese were examined in breast feathers of shorebirds migrating north through cape may, new jersey in 1991 and 1992. although we predicted that metal levels would be positively correlated with weight, this was only true for mercury in red knots (calidris canutus). selenium was negatively correlated with weight in red knots. no other significant correlation of metal concentrations with weight were found. lead and mercury were hig ... | 1993 | 24221132 |
| discovery of maritrema obstipum (digenea: microphallidae) from migratory birds in korea. | adults of maritrema obstipum (digenea: microphallidae) were found in the intestines of 4 species of migratory birds, including the sanderling (crocethia alba), kentish plover (charadrius alexandrines), mongolian plover (charadrius mongolus), and red-necked stint (calidris ruficollis), collected from yubu island, chungcheongnam-do, korea. the worms of were 451 × 265 µm in size, and were easily identifiable as maritrema species by the presence of the cirrus sac, and the ring-like distribution of t ... | 2011 | 22355219 |
| purifying selection and concerted evolution of rna-sensing toll-like receptors in migratory waders. | migratory birds encounter a broad range of pathogens during their journeys, making them ideal models for studying immune gene evolution. despite the potential value of these species to immunoecology and disease epidemiology, previous studies have typically focused on their adaptive immune gene repertoires. in this study, we examined the evolution of innate immune genes in three long-distance migratory waders (order charadriiformes). we analysed two parts of the extracellular domains of two toll- ... | 2017 | 28528860 |
| effects of food abundance and early clutch predation on reproductive timing in a high arctic shorebird exposed to advancements in arthropod abundance. | climate change may influence the phenology of organisms unequally across trophic levels and thus lead to phenological mismatches between predators and prey. in cases where prey availability peaks before reproducing predators reach maximal prey demand, any negative fitness consequences would selectively favor resynchronization by earlier starts of the reproductive activities of the predators. at a study site in northeast greenland, over a period of 17 years, the median emergence of the invertebra ... | 2016 | 28725405 |
| metal levels in shorebird feathers and blood during migration through delaware bay. | we investigated levels of arsenic mercury, lead, cadmium, and chromium in red knot (calidris canutus), semipalmated sandpipers (calidris pusilla), and sanderling (calidris alba) migrating through delaware bay, new jersey to determine if contaminant levels are likely to be causing negative effects on the populations of these shorebirds, to compare among species, and to explore differences among individuals collected early and late during their migration stopover. we analyzed blood and feathers, b ... | 2017 | 28444421 |
| temporal and spatial variation in bird and human use of beaches in southern california. | southern california's beaches can support a remarkable diversity of birds along the pacific flyway. we asked whether seasonal, annual, and spatial factors affect bird richness and abundance on public beaches. to do so, we conducted three years of monthly bird surveys on 12 sandy beaches in ventura california. across all surveys, we counted 22 shorebird species, 8 gull species, 24 other water bird species, and 24 landbird species. sanderling, western gull, heerman's gull, willet, marbled godwit, ... | 2013 | 23450765 |
| heavy metals in biota in delaware bay, nj: developing a food web approach to contaminants. | understanding the relationship between heavy metal and selenium levels in biota and their foods is important, but often difficult to determine because animals eat a variety of organisms. yet such information is critical to managing species populations, ecological integrity, and risk to receptors (including humans) from consumption of certain prey. we examine levels of cadmium, lead, mercury, and selenium in biota from delaware bay (new jersey, usa) to begin construction of a "springtime" food we ... | 2019 | 31200491 |
| long distance dispersal of the beach strawberry, fragaria chiloensis, from north america to chile and hawaii. | the beach strawberry, fragaria chiloensis (l.) duch, is found in a narrow coastal band from the aleutian islands to central california and then jumps thousands of kilometers all the way to hawaii and chile. since it likely had a north american origin, it must have been introduced to the other locations by long distance dispersal. the aim of this study was to determine which agent carried the beach strawberry to its pacific and south american locations. | 2020 | 32914164 |
| use of intertidal habitat by four species of shorebirds in an experimental array of oyster racks, reefs and controls on delaware bay, new jersey: avoidance of oyster racks. | many shorebirds breed in arctic habitats, and migrate south to wintering quarters in the southern hemisphere. shorebirds mainly forage on intertidal mudflats at low tide. a key spring stopover for shorebirds in north america is delaware bay, new jersey, where shorebirds feed on horseshoe crab (limulus polyphemus) eggs at high tide. the importance of intertidal to migrant shorebirds has been overlooked. this paper examines foraging of 4 shorebird species at reeds beach, delaware bay. the intertid ... | 2018 | 29929236 |
| habitat risk: use of intertidal flats by foraging red knots (calidris canutus rufa), ruddy turnstones, (arenaria interpres), semipalmated sandpipers (calidris pusilla), and sanderling (calidris alba) on delaware bay beaches. | shorebirds usually forage on intertidal flats that are exposed during low tide, and roost on higher areas when the tidal flats are covered with water. during spring migration on delaware bay (new jersey) shorebirds mainly forage on horseshoe crab (limulus polyphemus) eggs that are concentrated at the high tide line. however, they also use other habitats for foraging. we examined habitat use of 4 species of shorebirds (with declining populations) at five delaware bay beaches to determine their us ... | 2018 | 29734024 |
| interspecific comparison of the fecal microbiota structure in three arctic migratory bird species. | the gut microbiota of birds is known to be characterized for different species, although it may change with feeding items. in this study, we compared the gut microbiota of birds with different feeding behaviors in the same habitat. we collected fecal samples from three arctic species, snow buntings plectrophenax nivalis, sanderlings calidris alba, and pink-footed geese anser brachyrhynchus that are phylogenetically quite distant in different families to evaluate effects of diet on gut microbiota ... | 2020 | 32607176 |
| assessment of shorebird migratory fueling physiology and departure timing in relation to polycyclic aromatic hydrocarbon contamination in the gulf of mexico. | shorebirds depend on staging sites in the gulf of mexico that are frequently subject to pollution by oil and its toxic constituents, polycyclic aromatic hydrocarbons (pahs). it was hypothesized that pah contamination lowers staging site quality for migratory shorebirds, with consequences for fueling and departure timing. sediment total pah concentrations were measured at six staging sites along the texas and louisiana gulf coast. sites in louisiana were expected to have higher total pah concentr ... | 2018 | 30362719 |
| metal levels in blood of three species of shorebirds during stopover on delaware bay reflect levels in their food, horseshoe crab eggs. | understanding the relationship between metal level in predators and their prey is an important issue, and is usually difficult to determine because animals eat a variety of organisms. however, shorebirds that stop over during spring migration along delaware bay (new jersey) stay for only 2-3 weeks, and eat mainly horseshoe crab (limulus polyphemus) eggs. in this paper, we examine the relationship between metal levels in horseshoe crab eggs, and blood and feather levels of metals in red knot (cal ... | 2017 | 29051452 |
| mercury, lead, cadmium, arsenic, chromium and selenium in feathers of shorebirds during migrating through delaware bay, new jersey: comparing the 1990s and 2011/2012. | understanding temporal changes in contaminant levels in coastal environments requires comparing levels of contaminants from the same species from different time periods, particularly if species are declining. several species of shorebirds migrating through delaware bay have declined from the 1980s to the present. to evaluate some contaminants as cause for the declines, we examine levels of mercury, lead, cadmium, arsenic, chromium and selenium in feathers of red knot (calidris canutus, n = 46 in ... | 2015 | 29056651 |
| population fitness has a concave relationship with migration distance in sanderlings. | in focus: reneerkens, j., versluijs, t. s. l., piersma, t., alves, j. a., boorman, m., corse, c., … lok, t. (2020). low fitness at low latitudes: wintering in the tropics increases migratory delays and mortality rates in an arctic breeding shorebird. journal of animal ecology, 89, 691-703. a central question in migratory ecology has been to understand the fitness consequences of individual variation in migration distance among different species and populations. reneerkens et al. (2020) investiga ... | 2020 | 32141625 |
| low fitness at low latitudes: wintering in the tropics increases migratory delays and mortality rates in an arctic breeding shorebird. | evolutionary theories of seasonal migration generally assume that the costs of longer migrations are balanced by benefits at the non-breeding destinations. we tested, and rejected, the null hypothesis of equal survival and timing of spring migration for high arctic breeding sanderling calidris alba using six and eight winter destinations between 55°n and 25°s, respectively. annual apparent survival was considerably lower for adult birds wintering in tropical west africa (mauritania: 0.74 and gha ... | 2020 | 31584198 |
| polycyclic aromatic hydrocarbon exposure impairs pre-migratory fuelling in captively-dosed sanderling (calidris alba). | efficient fuelling is essential for migratory birds because fuel loads and fuelling rates affect individual fitness and survival during migration. many migrant shorebirds are exposed to oil pollution and its toxic constituents, polycyclic aromatic hydrocarbons (pahs), at migratory staging sites, which has the potential to interfere with avian refuelling physiology. in this study, we orally dosed shorebirds with environmentally-relevant pah mixtures to simulate dietary exposure during staging. fo ... | 2018 | 29902618 |
| novel dermatophilosis and concurrent amyloidosis in sanderlings ( calidris alba) from louisiana, usa. | : we observed sanderlings ( calidris alba) with facial growths in coastal louisiana, us during summer of 2016. severe lesions were associated with lethargy and lack of a flight response. we determined that the skin growth etiology was a bacterium of the genus dermatophilus, rarely reported infecting birds. sanderlings also exhibited severe amyloidosis. | 2018 | 29087775 |