surveys for ectoparasites on wildlife associated with amblyomma variegatum (acari: ixodidae)-infested livestock in st. croix, u.s. virgin islands.surveys in 2001, 2005, and 2006 attempted to determine the role of wildlife in maintenance and dissemination of the tropical bont tick, amblyomma variegatum (f.) (acari: ixodidae), in st. croix, u.s. virgin islands. small mammals; birds; white-tailed deer, odocoileus virginianus (zimmermann); and feral cattle, bos taurus l., were examined at nine premises, in mountainous rain forest, and in surrounding areas in western st. croix, an area including and central to all known bont tick-infested prem ...200919960701
a review of the mite subfamily harpirhynchinae (acariformes: harpirhynchidae)--parasites of new world birds (aves: neognathae).mites of the subfamily harpirhynchinae (acariformes: cheyletoidea: harpirhynchidae) associated with neognathous birds (aves: neognathae) in the new world are revised. in all, 68 species in 8 genera are recorded. among them, 27 new species and 1 new genus are described as new for science: harpyrhynchoides gallowayi bochkov, oconnor and klompen sp. nov. from columba livia (columbiformes: columbidae) from canada (manitoba), h. zenaida bochkov, oconnor and klompen sp. nov. from zenaida macroura (col ...201526624161
paramaritremopsis solielangi n. sp. and microphallus kinsellai n. sp. (digenea: microphallidae) parasites of charadrii (aves) of belize (central america).the authors describe and illustrate two trematodes from belize (central america): paramaritremopsis solielangi n. sp. from the small intestine of arenaria interpres is characterised by a body length of 478 microm, two short and pre-acetabular caeca, part of the uterus in close association with the cirrus-sac and left caecum, vitelline glands in the shape of a horseshoe, a short pre-ovarian cirrus-sac containing a long, cylindrical, voluminous and unarmed cirrus (size when evaginated: 150 x 20-30 ...200010966220
a new species of neohaematotrephus (digenea: echinostomiformes: cyclocoelidae) in the spotted-sandpiper actitis macularia (charadriiformes: scolopacidae) from venezuela.fischthal and nasir (1974) reported neohaematotrephus brasilianum (as cyclocoelum brasilianum) in the spotted-sandpiper actitis macularia from venezuela. three voucher specimens from that report, deposited in the united states national parasite collection, however, differ from n. brasilianum by having the cirrus sac on the sinistral side of the body, which resembles n. facioi, n. arayae, and n. gendrei. the new species is similar to n. brasilianum by having vitelline follicles extending well ant ...200616629331
polychlorinated biphenyls, dioxins, furans, and organochlorine pesticides in spotted sandpiper eggs from the upper hudson river basin, new 2004, spotted sandpipers (actitis macularia) were studied on the hudson river near fort edward south to new baltimore, ny and on two river drainages that flow into the hudson river. concentrations of 28 organochlorine pesticides, 160 polychlorinated biphenyl (pcb) congeners, and 17 dioxin and furan (pcdd-f) congeners were quantified in eggs collected on and off the hudson river. the pattern of organochlorine pesticides and pcdd-f congeners did not differ significantly between eggs collected o ...201019809875
the effects of an environmentally relevant 58-congener polychlorinated biphenyl (pcb) mixture on cardiac development in the chick embryo.chicken (gallus domesticus) embryonic exposure in ovo to a 58-congener polychlorinated biphenyl (pcb) mixture resulted in teratogenic heart defects in chick embryos at critical heart developmental stages hamburger-hamilton (hh) stages 10, 16, and 20. the 58-congener mixture contained relative proportions of primary congeners measured in belted sandpiper (megaceryle alcyon) and spotted sandpiper (actitis macularia) eggs collected along the upper hudson river, new york, usa, and chicken doses were ...201323417652
microglia and neurons in the hippocampus of migratory sandpipers.the semipalmated sandpiper calidris pusilla and the spotted sandpiper actitis macularia are long- and short-distance migrants, respectively. c. pusilla breeds in the sub-arctic and mid-arctic tundra of canada and alaska and winters on the north and east coasts of south america. a. macularia breeds in a broad distribution across most of north america from the treeline to the southern united states. it winters in the southern united states, and central and south america. the autumn migration route ...201626577847
accumulation of selenium and lack of severe effects on productivity of american dippers (cinclus mexicanus) and spotted sandpipers (actitis macularia).selenium has been found at elevated concentrations in water, sediments, and aquatic biota in the elk river (british columbia, canada) and some of its tributaries downstream of several coal mines. selenium water concentrations in those areas exceed canadian and british columbia guidelines and are above levels at which adverse effects to fish and waterfowl could occur. we compared selenium concentrations in the eggs of two riverine waterbirds, american dippers and spotted sandpipers, with measures ...200515750773
sciadiocara denticulata n. sp. (acuariidae) from actitis macularia (l.) and other nematodes from spotted sandpiper and black-bellied plover. 19725058556
seasonal changes in prolactin and luteinizing hormone in the polyandrous spotted sandpiper, actitis macularia.the polyandrous spotted sandpiper (actitis macularia) is a species characterized by female dominance over males and predominant male parental care. prolactin (prl) and luteinizing hormone (lh) were analyzed in plasma samples obtained serially from individuals across different stages of the breeding season. the reproductive status of each sampled individual was known in detail. similar prl values were obtained independently by two different assays. males tended to have higher plasma prl levels th ...19863770431
testosterone-induced inhibition of incubation in the spotted sandpiper (actitis mecularia).the spotted sandpiper (actitis macularia) is characterized by intense female intrasexual competition and predominantly male parental care. females often are polyandrous. incubating males were implanted with testosterone (t)-filled silastic tubes. plasma t levels were significantly elevated by t implants while prolactin (prl) remained unchanged. birds implanted with t deserted clutches (30%) or exhibited reduced incubation constancy (50%) while controls incubated normally. the t implants appeared ...19892793081
plasma steroid hormones in relation to behavioral sex role reversal in the spotted sandpiper, actitis macularia.plasma samples collected from spotted sandpipers during the reproductive season were analyzed for testosterone, dihydrotestosterone (dht), estradiol-17 beta and progesterone. prior to incubation, plasma testosterone and dht levels were significantly greater in males than in females. estradiol levels of paired females were significantly greater than those of paired males. testosterone and dht levels of unpaired resident and paired males were significantly greater than those of incubating and broo ...19863828434
hormonal correlates of polyandry in the spotted sandpiper, actitis macularia.plasma samples from naturally breeding populations of spotted sandpipers, actitis macularia, were analyzed by radioimmunoassay for circulating levels of immunoreactive luteinizing hormone (irlh), and four steroid hormones. plasma levels of irlh, corticosterone (c), and estradiol-17 beta (e) did not differ between males and females. males had curiously high levels of e (0.64 pg/ml in nonnesting males; 0.35 pg/ml in nesting males) which are similar to those of nonlaying females (0.23 pg/ml). testo ...19846510697
helminth parasites of spotted sandpipers, actitis macularius (charadriiformes), from belize, texas, and total, 70 spotted sandpipers, actitis macularius, were examined for helminth parasites; 47 from belize, 18 from texas, and 5 from montana. the compound communities consisted of 10 species of helminths for belize, 5 for texas, and 6 for montana, for a total of 17 different species. the most prevalent and abundant helminths for belize were 3 microphallid trematodes, paramaritremopsis solielangi, levinseniella carteretensis, and microphallus kinsellai; for texas, the cestodes kowalewskiella cing ...200919663533
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