Fascioloides magna in White-Tailed Deer (Odocoileus virginianus): Observations on the Pairing Tendency

1977 ◽  
Vol 63 (6) ◽  
pp. 1050 ◽  
Author(s):  
W. J. Foreyt ◽  
W. M. Samuel ◽  
A. C. Todd
Keyword(s):  
Odocoileus Virginianus ◽  
Fascioloides Magna

Parelaphostrongylus tenuis (Nematoda) and Fascioloides magna (Trematoda) in moose of southeastern Manitoba

1974 ◽  
Vol 52 (2) ◽  
pp. 235-239 ◽  
Author(s):  
Murray W. Lankester
Keyword(s):  
Odocoileus Virginianus ◽  
Liver Damage ◽  
Alces Alces ◽  
Neurologic Disease ◽  
Suitable Host ◽  
Fascioloides Magna ◽  
Parelaphostrongylus Tenuis

Neurologic disease caused by the meningeal worm, Parelaphostrongylus tenuis (Dougherty 1945), is reported in moose of southeastern Manitoba, where the ranges of moose (Alces alces) and white-tailed deer (Odocoileus virginianus) overlap. Moose of this area are also infected commonly with the large American fiver fluke, Fascioloides magna (Bassi 1875). The moose cannot be considered a suitable host of F. magna since extensive liver damage results from infection, thick-walled cysts are formed, and mature flukes with eggs were not found in moose examined. Trematode eggs were found in liver sections of one animal but were not present in the faeces. It is suggested F. magna may be unable to persist in moose populations in the absence of a more suitable cervid host such as white-tailed deer.

Fascioloides magna (Trematoda) and Taenia hydatigena (Cestoda) from white-tailed deer

1988 ◽  
Vol 66 (6) ◽  
pp. 1359-1364 ◽  
Author(s):  
E. M. Addison ◽  
J. Hoeve ◽  
D. G. Joachim ◽  
D. J. McLachlin
Keyword(s):  
Odocoileus Virginianus ◽  
Adult Male ◽  
Age Groups ◽  
Detectable Effect ◽  
Intensity Of Infection ◽  
Taenia Hydatigena ◽  
Fascioloides Magna ◽  
Mean Intensity

Livers of 164 white-tailed deer (Odocoileus virginianus) from the Peterborough Crown Game Preserve in central Ontario were examined for Fascioloides magna and Taenia hydatigena. Fascioloides magna was recovered from 2.6% of fawns and 68.3% of all older deer, and mean intensity of infection increased with age. Both prevalence and intensity of unencapsulated flukes were similar among all age-groups of deer 1 year of age and older. While the majority (96%) of encapsulated flukes were within capsules containing more than one fluke, aggregation of flukes is probably not required for either encapsulation or maturation. Infection with F. magna had no detectable effect on the condition of yearling or adult male deer, where condition was measured by depth of fat on the rump and sternum. Cysticerci of T. hydatigena were most prevalent among yearlings (70%) as compared with all other age-groups (29%). Mean intensity of infection with T. hydatigena tended to increase with age.

Características generales del comportamiento del venado cola blanca (Odocoileus virginianus) en semicautiverio en Cobán, Alta Verapaz, Guatemala

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Arrue Vaides
Keyword(s):  
Costa Rica ◽  
Odocoileus Virginianus ◽  
Pyrus Communis ◽  
Para Determinar ◽  
Alta Verapaz

En Guatemala, el venado Cola Blanca es de los animales cinegéticos más importantes y sin duda de los más perseguidos a pesar de eso, se han realizado pocos estudios sobre él. En la actualidad, con la formación de la colección de la Fábrica de Municiones del ejército-FME-localizada en el municipio de Cobán, en el departamento de Alta Verapaz, se busca asegurar la conservación de esta especie. El estudio consistió en observaciones diarias para determinar el comportamiento general: social, productivo, reproductivo del venado y colectas de campo realizadas en las épocas de menor y mayor precipitación, con el objeto de obtener información acerca de la calidad de las principales plantas forrajeras, mediante análisis por el método de Weende. Se cuantificó la disponibilidad del forraje, utilizando porcentajes estimados de cubierta, para las plantas herbáceas y para arbustos y árboles se usó el muestreo sistemático por medio de parcelas de 10 x 10 m. Las plantas forrajeras principales fueron hierbas graminoides por existir en mayor disponibilidad (75%), luego los arbustos (22%), y por último las especies arbóreas (3%). Los forrajes consumidos fueron generalmente de calidad inferior que los forrajes de otras latitudes. Dentro de las especies arbustivas cabe mencionar como las más importantes para el venado del área, el clavel de Panamá (Hibiscus rosasimensis),pera (Pyrus communis) y Costa Rica (Bahuinia sp.). Estas especies junto con gramíneas como Andropogon bicornis, Panicum sellowii y Paspalum conjugatum, constituyen la base alimenticia del venado Cola Blanca en la FME. Los datos presentados sobre comportamiento social, sugieren diferencias en algunas estrategias sociales y de comportamiento a una edad temprana entre la población estudiada en semicautiverio y los reportes para poblaciones que habitan áreas silvestres o en completo cautiverio. Las hembras generalmente tienen sus crías en marzo, con un pico de nacimientos al final de dicho mes, aunque este es un período que puede prolongarse hasta mediados de abril. Lo que se observa en Cobán es una estacionalidad en la época de partos, lo cual concuerda con los factores climáticos que están relacionados con la sobrevivencia de los cervatos. Se infiere que los cervatos nacidos durante los meses de marzo y abril tendrán una mayor probabilidad de sobrevivencia que aquellos nacidos después o antes de la estación.Cuando las lluvias fuertes se presentan los cervatos son capaces fisiológicamente de utilizar los recursos vegetativos disponibles para su crecimiento y desarrollo. Por otra parte, las madres se recuperan de la tensión fisiológica como consecuencia de la lactancia.

scholarly journals Press-Pulse Odocoileus Virginianus Herbivory in Relict Tsuga Canadensis Stands in the Western Upper Peninsula of Michigan, USA

Forests ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 496
Author(s):  
Grace L. Parikh ◽  
Christopher R. Webster
Keyword(s):  
Odocoileus Virginianus ◽  
Polar Vortex ◽  
Tsuga Canadensis ◽  
Forest Community ◽  
Population Declines ◽  
Upper Peninsula ◽  
Deer Population ◽  
High Severity ◽  
Substantial Decline ◽  
Upper Peninsula Of Michigan

Ungulate herbivory occurring within a forest plant community’s natural range of variation may help maintain species diversity. However, acute or chronically elevated levels of herbivory can produce dramatic changes in forest communities. For example, chronically high levels of herbivory by white-tailed deer (Odocoileus virginianus Zimmerman) in regions of historically low abundance at northern latitudes have dramatically altered forest community composition. In eastern hemlock (Tsuga canadensis L. Carrière) stands where deer aggregate during winter, high deer use has been associated with a shift towards deciduous species (i.e., maples [Acer spp.]) dominating the regeneration layer. Especially harsh winters can lead to deer population declines, which could facilitate regeneration of species that have been suppressed by browsing, such as hemlock. To enhance our understanding of how fluctuations in herbivory influence regeneration dynamics, we surveyed regeneration and deer use in 15 relict hemlock stands in the western Upper Peninsula of Michigan in 2007 and again in 2015. With the exception of small seedlings (0.04–0.24 m height), primarily maples whose abundance increased significantly (p < 0.05), we observed widespread significant declines (p < 0.05) in the abundance of medium (0.25 ≤ 1.4 m height) and large regeneration (>1.4 m tall ≤ 4 cm diameter at breast height) over the study period. Midway through our study period, the region experienced a high severity winter (i.e., “polar vortex”) which resulted in a substantial decline in the white-tailed deer population. Given the dominance of maples and dearth of hemlock in the seedling layer, the decline in the deer population may fail to forestall or possibly hasten the trend towards maple dominance of the regeneration layer as these stands recover from pulses of acute herbivory associated with high-severity winters and the press of chronically high herbivory that precedes them.

scholarly journals Soils and forage quality as predictors of white-tailed deer Odocoileus virginianus morphometrics

2010 ◽  
Vol 16 (4) ◽  
pp. 430-439 ◽  
Author(s):  
Phillip D. Jones ◽  
Bronson K. Strickland ◽  
Stephen Demarais ◽  
Brian J. Rude ◽  
Scott L. Edwards ◽  
...  
Keyword(s):  
Odocoileus Virginianus ◽  
Forage Quality
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