| interspecific variation in sugar and amino acid transport by the avian cecum. | previous studies of cecal sugar and amino acid transport in the domestic chicken led to a widely held generalization that the avian cecum is unimportant as a site of nutrient transport. in fact, we found that the uptake capacity of the cecum for hexose sugars and amino acids is substantial in some species of birds. cecal transport of glucose was measurable in all five study species (canada goose, sage grouse, domestic chicken, red-necked phalarope, and rock dove), approached or exceeded intestin ... | 1989 | 2575122 |
| new records and new species of mites of the subfamily harpirhynchinae (acariformes: harpirhynchidae) infesting birds in manitoba, canada. | five new species and one new genus of the subfamily harpirhynchinae (acariformes: harpirhynchidae) are described from birds in canada: harpyrhynchoides heatherae sp. nov. from junco hyemalis (passeriformes: emberizidae), h. botaurus sp. nov. from botaurus lentiginosus (pelecaniformes: ardeidae), h. phalaropus sp. nov. from phalaropus lobatus (charadriiformes: scolopacidae), neharpyrhynchus loxia sp. nov. from loxia curvirostra (passeriformes: fringillidae), and fainharpirhynchus contopus gen. no ... | 2013 | 24338301 |
| modeling nonresident seabird foraging distributions to inform ocean zoning in central california. | seabird aggregations at sea have been shown to be associated with concentrations of prey. previous research identified central california as a highly used foraging area for seabirds, with locally breeding seabirds foraging close to their colonies on southeast farallon island. herein, we focus on nonresident (i.e. non-locally breeding) seabird species off of central california. we hypothesized that high-use foraging areas for nonresident seabirds would be influenced by oceanographic and bathymetr ... | 2017 | 28122001 |
| [ectoparasites on birds (passeriformes, charadriiformes) migrating through the moravian gateway]. | the birds migrating through the entrance to the moravian gate were subjected to a three-year ectoparasitological study. the studied 24 bird species had three species of louse flies (diptera, hippoboscidae ), 31 species of biting lice (mallophaga), two species of fleas ( aphaniptera ) and one species of ticks (acarina, ixodidae). in czechoslovakia the biting lice quadraceps connexus were detected for the first time to be present on phalarope ( phalaropus lobatus ) and menacanthus sp. were found f ... | 1983 | 6426122 |
| [ethmoid tumors in moose and roe deer]. | ethmoid tumors are expansively-infiltratively growing tumors of carcinomatous or sarcomatous nature, deriving from the mucous membrane of the ethmoid bone. in sweden, such tumors were found in 35 elks (alces a. alces) and 4 roe deer (capreolus capreolus) during the years 1947-1982, that means a frequency of about 1 and 0.1 per cent, respectively of the investigation material. however, in the free living elk and roe deer population, the frequency might be much lower. the tumors were malign, exten ... | 1985 | 2993995 |
| the mitochondrial genome of red-necked phalarope phalaropus lobatus (charadriiformes: scolopacidae) and phylogeny analysis among scolopacidae. | the red-necked phalarope is a wonderful species with specific morphological characters and lifestyles. mitochondrial genomes, encoding necessary proteins involved in the system of energy metabolism, are important for the evolution and adaption of species. in this study, we determined the complete mitogenome sequence of phalaropus lobatus (charadriiformes: scolopacidae). the circular genome is 16714 bp in size, containing 13 pcgs, two ribosomal rnas and 22 trnas and a high at-rich control region. ... | 2018 | 29892953 |
| influence of human development and predators on nest survival of tundra birds, arctic coastal plain, alaska. | nest predation may influence population dynamics of birds on the arctic coastal plain (acp) of alaska, usa. anthropogenic development on the acp is increasing, which may attract nest predators by providing artificial sources of food, perches, den sites, and nest sites. enhanced populations or concentrations of human-subsidized predators may reduce nest survival for tundra-nesting birds. in this study, we tested the hypothesis that nest survival decreases in proximity to human infrastructure. we ... | 2009 | 19769108 |
| seasonal changes in gonadal steroids of a monogamous versus a polyandrous shorebird. | we examined the relationship between circulating levels of gonadal steroids (testosterone, progesterone, and estradiol) and breeding behavior in semipalmated sandpipers (calidris pusilla) and red-necked phalaropes (phalaropus lobatus) breeding sympatrically at la pérouse bay, 40 km east of churchill, manitoba. semipalmated sandpipers are territorial and monogamous. both parents incubate equally. red-necked phalaropes are nonterritorial and polyandrous. only male phalaropes care for eggs and youn ... | 1990 | 2289682 |
| delayed egg-laying and shortened incubation duration of arctic-breeding shorebirds coincide with climate cooling. | biological impacts of climate change are exemplified by shifts in phenology. as the timing of breeding advances, the within-season relationships between timing of breeding and reproductive traits may change and cause long-term changes in the population mean value of reproductive traits. we investigated long-term changes in the timing of breeding and within-season patterns of clutch size, egg volume, incubation duration, and daily nest survival of three shorebird species between two decades. base ... | 2018 | 29375802 |
| sexual size dimorphism in red-necked phalaropes and functional significance of nonsexual bill structure variation for feeding performance. | sexual size dimorphism is widespread in shorebirds, yet no tests of the assumption that such size dimorphism extends to functionally significant dimensions of the bill exist. this report presents tests of: (1) the assumption that sexual size dimorphism extends to the feeding structures in sexually size dimorphic bird, and (2) the hypothesis that bill-size variation influences feeding performance in phalaropus lobatus, the red-necked phalarope. discriminant function analysis revealed that the sex ... | 1996 | 29852574 |
| [branchiopods--intermediate hosts of the cestode anomolepis averini (spassky et yurpalova, 1967)(cestoda: dilepididae)]. | in the biocoenosis of the lake tengiz (central kazakhstan) artemia salina (3.3%) and branchinella spinosa (0.22%) were found to be infected with larvae of cestodes--delipidids anomolepis avertini (spassky et yurpalova, 1967). phalaropus lobatus from this water body was also infected (13.7) with this cestode, the infection intensity being from 1 to 15 strobiles in one bird. figures and morphological description of cysticercoids and mature cestodes of anomolepis averini are given. | 2007 | 141027 |