| isospora plectrophenaxia n. sp (apicomplexa: eimeriidae), a new coccidian parasite found in snow bunting (plectrophenax nivalis) nestlings on spitsbergen. | faecal samples were collected from four 8 days old snow bunting nestlings from one nest in ny-alesund, spitsbergen, in summer 2006. after sporulation, samples were examined for coccidian parasites using flotation centrifuging. we found isosporan oocysts in three birds, intensity of infection varied between individuals from 35 to 6,000 oocysts per defecation. all oocysts belonged to one species, which is described here as a new species. the spherical or subspherical oocysts (fig. 1) have a browni ... | 2007 | 17701217 |
| the bird ectoparasite dermanyssus hirundinis (acari, mesostigmata) in the high arctic; a new parasitic mite to spitsbergen, svalbard. | ectoparasites are common on birds and in their nests. amongst these parasites are diverse gamasid mite species that can lead to irritation, disease transmission and blood loss. few studies of the ectoparasites of birds breeding in the high arctic exist. the parasitic mite, dermanyssus hirundinis, was found in nests of snow buntings plectrophenax nivalis nivalis, both natural nests and within nesting boxes, on spitsbergen. densities per nest varied from sporadic to greater than 26,000 individuals ... | 2012 | 23129197 |
| keeping the clock set under the midnight sun: diurnal periodicity and synchrony of avian isospora parasites cycle in the high arctic. | for isospora (protozoa: eimeriidae) parasites of passerine birds, diurnal periodicity of oocyst output is a well-described phenomenon. from the temporal zone to the tropics, oocyst production is correlated with the light-dark cycle, peaking in the afternoon hours. however, nothing is known about the existence of diurnal periodicity of these parasites in the birds of high arctic environments, under permanent light during summer. we sampled free-ranging snow bunting (aves: passeriformes), on svalb ... | 2011 | 21756419 |