| parasites of waterfowl from southwest texas: i. the northern cinnamon teal, anas cyanoptera septentrionalium. | seventeen northern cinnamon teal, anas cyanoptera septentrionalium were collected in hudspeth county, texas: 10 in january, 1974, and seven in september, 1974. fifteen parasite species were recovered: 11 were new host records. three species of parasites were recorded from spring migrants and 15 from fall migrants. | 1977 | 839625 |
| control of breathing and respiratory gas exchange in high-altitude ducks native to the andes. | we examined the control of breathing and respiratory gas exchange in six species of high-altitude duck that independently colonized the high andes. we compared ducks from high-altitude populations in peru (lake titicaca at ∼3800 m above sea level; chancay river at ∼3000-4100 m) with closely related populations or species from low altitude. hypoxic ventilatory responses were measured shortly after capture at the native altitude. in general, ducks responded to acute hypoxia with robust increases i ... | 2019 | 30846536 |
| first molecular identification of australapatemon burti (miller, 1923) (trematoda: digenea: strigeidae) from an intermediate host radix labiata (rossmaessler) (gastropoda: lymnaeidae) in europe. | the strigeid digenean species australapatemon burti (miller, 1923) (trematoda: digenea: strigeidae) was originally described from north america, but recorded in the neotropical region (drago et al. 2007; hernández-mena et al. 2014; blasco-costa et al. 2016) and in central europe (faltýnková et al. 2007). in europe, this species is rare, and there is not much information about its range (faltýnková et al. 2007; soldánová et al. 2012). australapatemon burti has a complex life cycle with three larv ... | 2016 | 27395696 |
| potency, efficacy, and antigenic mapping of h7 avian influenza virus vaccines against the 2012 h7n3 highly pathogenic avian influenza virus from mexico. | in the spring of 2012 an outbreak of h7n3 highly pathogenic (hp) avian influenza virus (aiv) occurred in poultry in mexico. vaccination was implemented as a control measure, along with increased biosecurity and surveillance. at that time there was no commercially available h7 aiv vaccine in north america; therefore, a recent h7n3 wild bird isolate of low pathogenicity from mexico (a/cinnamon teal/mexico/2817/2006 h7n3) was selected and utilized as the vaccine seed strain. in these studies, the p ... | 2014 | 25518428 |
| genetic and phenotypic divergence between low- and high-altitude populations of two recently diverged cinnamon teal subspecies. | spatial variation in the environment can lead to divergent selection between populations occupying different parts of a species' range, and ultimately lead to population divergence. the colonization of new areas can thus facilitate divergence in beneficial traits, yet with little differentiation at neutral genetic markers. we investigated genetic and phenotypic patterns of divergence between low- and high-altitude populations of cinnamon teal inhabiting normoxic and hypoxic regions in the andes ... | 2012 | 23289570 |
| experimental infection with low and high pathogenicity h7n3 chilean avian influenza viruses in chiloe wigeon (anas sibilatrix) and cinnamon teal (anas cyanoptera). | two different wild duck species common in chile and neighboring countries, chiloe wigeon (anas sibilatrix) and cinnamon teal (anas cyanoptera), were intranasally inoculated with 10(6) mean embryo infective dose (eid50) of the h7n3 low pathogenicity (lp) avian influenza virus (aiv) (a/chicken/chile/176822/02) or high pathogenicity (hp) aiv (a/chicken/chile/ 184240-1/02), in order to study the infectivity and pathobiology of these viruses. none of the virus-inoculated ducks had clinical signs or d ... | 2011 | 22017047 |
| waterfowl ecology and avian influenza in california: do host traits inform us about viral occurrence? | we examined whether host traits influenced the occurrence of avian influenza virus (aiv) in anatidae (ducks, geese, swans) at wintering sites in california's central valley. in total, 3487 individuals were sampled at sacramento national wildlife refuge and conaway ranch duck club during the hunting season of 2007-08. of the 19 anatidae species sampled, prevalence was highest in the northern shoveler (5.09%), followed by the ring-necked duck (2.63%), american wigeon (2.57%), bufflehead (2.50%), g ... | 2010 | 20521673 |
| an avian influenza virus from waterfowl in south america contains genes from north american avian and equine lineages. | apart from an outbreak in commercial poultry in chile in 2002, there have been few reports of avian influenza in south america. however, surveillance in free-flying birds has been limited. an avian influenza virus was isolated from a cinnamon teal (anas cyanoptera) in bolivia in 2001 from samples collected for an avian influenza virus and avian paramyxovirus surveillance study. this isolate was determined to be an h7n3 virus by gene sequencing. analysis of all eight genes revealed that five gene ... | 2007 | 17494565 |
| h7n3 avian influenza virus found in a south american wild duck is related to the chilean 2002 poultry outbreak, contains genes from equine and north american wild bird lineages, and is adapted to domestic turkeys. | an h7n3 avian influenza virus (aiv) was isolated from a cinnamon teal (anas cyanoptera) (a/cinnamonteal/bolivia/4537/01) during a survey of wild waterfowl in bolivia in 2001. the na and m genes had the greatest identity with north american wild bird isolates, the ns was most closely related to an equine virus, and the remaining genes were most closely related to isolates from an outbreak of h7n3 in commercial poultry in chile in 2002. the ha protein cleavage site and the results of pathogenesis ... | 2006 | 16840356 |
| avian influenza viruses and paramyxoviruses in wintering and resident ducks in texas. | cloacal swabs were collected from teal (anas crecca, anas cyanoptera, anas discors), mottled duck (anas fulvigula) and northern pintail (anas acuta) in brazoria county, texas, usa, during february 2001, mottled ducks during august 2001, and blue-winged teal (a. discors) during february 2002. prevalence of avian influenza virus (aiv) infections during each sampling period were 11, 0, and 15%, respectively. the hemagglutinin (h) subtypes h2 and h7 were detected in both years, while the h8 subtype ... | 2005 | 16244076 |
| sitting ducklings: timing of hatch, nest departure, and predation risk for dabbling duck broods. | for ground-nesting waterfowl, the timing of egg hatch and duckling departure from the nest may be influenced by the risk of predation at the nest and en route to wetlands and constrained by the time required for ducklings to imprint on the hen and be physically able to leave the nest. we determined the timing of hatch, nest departure, and predation on dabbling duck broods using small video cameras placed at the nests of mallard (anas platyrhynchos; n = 26), gadwall (mareca strepera; n = 24), and ... | 2019 | 31110697 |
| a morphometric analysis of the lungs of high-altitude ducks and geese. | we examined the morphology of the lungs of five species of high-altitude resident ducks from lake titicaca in the peruvian andes (yellow-billed pintail [anas georgica], cinnamon teal [anas cyanoptera orinomus], puna teal [anas puna], speckled teal [anas flavirostris oxyptera], and ruddy duck [oxyura jamaicensis ferruginea]) and compared them with those of the high-altitude migratory bar-headed goose (anser indicus) and the low-altitude migratory barnacle goose (branta leucopsis). we then determi ... | 2020 | 32173858 |
| cardiovascular responses to progressive hypoxia in ducks native to high altitude in the andes. | the cardiovascular system is critical for delivering o2 to tissues. here, we examined the cardiovascular responses to progressive hypoxia in four high-altitude andean duck species compared with four related low-altitude populations in north america, tested at their native altitude. ducks were exposed to stepwise decreases in inspired partial pressure of o2 while we monitored heart rate, o2 consumption rate, blood o2 saturation, haematocrit (hct) and blood haemoglobin (hb) concentration. we calcu ... | 2020 | 32041807 |