L'alimentation estivale du campagnol des champs, Microtus pennsylvanicus, Ord.

1979 ◽  
Vol 57 (10) ◽  
pp. 2028-2032 ◽  
Author(s):  
Jean-Marie Bergeron ◽  
Jacques Juillet
Keyword(s):  
Stomach Content ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Microtus Pennsylvanicus ◽  
Meadow Voles ◽  
Animal Feeds ◽  
Content Analyses ◽  
Common Plant

Stomach content analyses performed on 272 meadow voles (Microtus pennsylvanicus) revealed that the animal feeds on 35 of the 45 species of plant present in its habitat. Timothy is the most abundant and the most common plant in the vole's diet. The abundance of the plants sampled in the habitat is positively correlated with the abundance of the plants found in the stomach contents. However, some species, like meadow grass (Poa spp.), aredefinitely preferred by the voles since they appear more frequently in the stomach contents than in the habitat. Some feeding habits are also sex dependent.[Translated by the journal]

Eléments minéraux du régime alimentaire du campagnol des champs, Microtus pennsylvanicus (Ord.)

1976 ◽  
Vol 54 (9) ◽  
pp. 1565-1570 ◽  
Author(s):  
Jean-Marie Bergeron
Keyword(s):  
Stomach Contents ◽  
Microtus Pennsylvanicus ◽  
Régime Alimentaire ◽  
Reproductive Condition ◽  
Meadow Voles ◽  
Calcium Phosphorus ◽  
Males And Females

One hundred and ninety-five meadow voles, Microtus pennsylvanicus (Ord.) were captured by means of 485 traps installed each month during the summer of 1974 in four types of culture. The analysis of minerals in their diet indicates low variation in potassium levels, whereas nitrogen, calcium, phosphorus, and magnesium levels appear to be much more environment-dependent. There are a few differences between the diets of males and females. Stomach contents of captured voles do not vary significantly from one type of culture to another, but the physiological reproductive condition of the animals accounts for significant differences in stomach contents.[Journal translation]

scholarly journals Seasonal Diets of Newfoundland Martens, Martes americana atrata

2005 ◽  
Vol 119 (1) ◽  
pp. 43 ◽  
Author(s):  
John W. Gosse ◽  
Brian J. Hearn
Keyword(s):  
Food Item ◽  
Stomach Contents ◽  
Diet Breadth ◽  
Microtus Pennsylvanicus ◽  
Martes Americana ◽  
Meadow Voles ◽  
Snowshoe Hares ◽  
Time Of Year

We analyzed scats (n = 679) and stomach contents (n = 25) collected from 1980-2003 to assess the relative frequencies of food types utilized by Newfoundland Marten (Martes americana atrata) during summer and winter. Meadow Voles (Microtus pennsylvanicus) were the most prevalent food item occurring in 80% and 47.5% of samples from summer and winter, respectively. Apart from Snowshoe Hares (Lepus americana), which occurred in 28% of winter samples, all other food types occurred in <16% of samples during each season. Diet breadth was widest during winter and may be related to a lower availability of Meadow Voles during this time of year. Erratum included.

scholarly journals Food Habits of the Endemic Long Legged Wood Frog, Rana Pseudodalmatina (Amphibia, Ranidae), in Northern Iran

2016 ◽  
Vol 50 (4) ◽  
pp. 363-368
Author(s):  
M. Najibzadeh ◽  
A. Gharzi ◽  
N. Rastegar-Pouyani ◽  
E. Rastegar-Pouyani ◽  
A. Pesarakloo
Keyword(s):  
Stomach Content ◽  
Food Habits ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Food Habit ◽  
Wood Frog ◽  
Hyrcanian Forest ◽  
Northern Iran ◽  
Frog Species ◽  
Prey Items

Abstract Iranian long legged wood frog, Rana pseudodalmatina Eiselt & Schmidtler, 1971 is a brown frog species endemic to the Hyrcanian forest. The objective of the present study is to collect detailed information on the feeding habits of 44 specimens of this species (24 ♂, 20 ♀) by analyzing the stomach contents of individuals from 10 populations inhabiting range. The food habit of R. pseudodalmatina generally varies by the availability of surrounding prey items, and it is a foraging predator, the food of which consists largely of Coleoptera (mainly Carabidae, Dytiscidae and Haliplidae), Diptera (Muscidae) and Hymenoptera (Formicidae), and no difference was found between females and males in the stomach content.

Dimorphisme sexuel et régime alimentaire de l'hermine dans un agrosystème du Québec

1984 ◽  
Vol 62 (4) ◽  
pp. 594-600 ◽  
Author(s):  
Michel Raymond ◽  
Jean-Marie Bergeron ◽  
Yves Plante
Keyword(s):  
Feeding Habits ◽  
Microtus Pennsylvanicus ◽  
Feeding Strategies ◽  
Important Food ◽  
Meadow Voles ◽  
Blarina Brevicauda ◽  
Food Components ◽  
Dimorphisme Sexuel ◽  
Sorex Cinereus ◽  
Males And Females

Variations in the diet of the ermin (Mustela erminea) were studied from 1978 to 1980 in relation to the relative availability of meadow voles (Microtus pennsylvanicus), the dominant mammal of Southern Quebec agrosystems. The analysis of 328 ermine scat samples showed that the vole does constitute the main prey item, but that the masked shrew (Sorex cinereus), the short-tailed shrew (Blarina brevicauda), and various birds are also important food components. Male ermins have more flexible feeding habits than females, who eat mostly meadow voles whatever their relative abundance. Both males and females fail to make full use of the shrews and avoid prey that weigh more than 50 g. Overlap of their realized alimentary niches is thus considerable except when small mammals are scarce. In that case, males and females use different feeding strategies; however, the hypothesis suggested by J. H. Brown and R. C. Lasiewsky (1972. Ecology, 53: 939–943) does not seem to be confirmed. The evolution of size dimorphism in this small mustelid is discussed; our results confirm the intra-sexual selection hypothesis proposed independantly by S. Erlinge (1979. Oikos, 33: 233–245) and P. J. Moors (1980. Oikos, 34: 147–158).[Journal translation]

Stomach Contents of New Zealand Inland Shags

1951 ◽  
Vol 2 (2) ◽  
pp. 245 ◽  
Author(s):  
P Dickinson
Keyword(s):  
New Zealand ◽  
Stomach Content ◽  
Stomach Contents ◽  
The State ◽  
Salmonid Fish ◽  
Freshwater Crayfish ◽  
Important Food ◽  
Phalacrocorax Carbo ◽  
Content Analyses ◽  
Food Fish

Twenty-nine stomachs of the large black shag (Phalacrocorax carbo (Linn.)) and 61 of the white-throated or little pied shag (P. brevirostris (Gould)) from the Rotorua-Taupo area were examined. Techniques used to determine the state of digestion and the identification of otoliths are discussed. Stomach content analyses showed that the food of lake-feeding shags in July consisted almost entirely of fish and freshwater crayfish. Bullies (Gobiomorphus sp.) were the most important food fish. Salmonid fish were found in one stomach (P. carbo).

A method of estimating diet digestibility in wild meadow voles

1985 ◽  
Vol 63 (5) ◽  
pp. 1020-1022 ◽  
Author(s):  
Sandra L. MacPherson ◽  
Frederick A. Servello ◽  
Roy L. Kirkpatrick
Keyword(s):  
Dry Matter ◽  
Stomach Contents ◽  
Microtus Pennsylvanicus ◽  
Meadow Vole ◽  
Regression Equations ◽  
Chemical Analyses ◽  
Meadow Voles ◽  
Digestible Energy ◽  
Microtus Pinetorum

Regression equations for estimating diet digestibility in meadow voles (Microtus pennsylvanicus) were developed using laboratory digestion trials and chemical analyses of diets and stomach contents. These equations were used to obtain estimates of the apparent digestible dry matter (DDM) and apparent digestible energy (DE) in the diets of wild meadow voles. The estimated DDM and DE in the diets of two wild meadow vole populations varied between 62.9 and 75.2% and 62.0 and 74.2%, respectively, and were similar to those reported previously for pine voles (Microtus pinetorum).

A note on the stomach contents of adult Atlantic salmon (Salmo salar, Linnaeus) from Port Burwell, Northwest Territories

1979 ◽  
Vol 57 (7) ◽  
pp. 1502-1503 ◽  
Author(s):  
John D. Neilson ◽  
David J. Gillis
Keyword(s):  
Atlantic Salmon ◽  
Northwest Territories ◽  
Salmo Salar ◽  
Stomach Content ◽  
Stomach Contents ◽  
Range Extension ◽  
Invertebrate Prey ◽  
Content Analyses ◽  
Important Fish ◽  
Prey Items

Stomach content analyses on 28 Atlantic salmon captured at Port Burwell, Northwest Territories, in late August, 1977, indicate that invertebrate prey items were the most important by volume. Parathemisto libellula dominated the invertebrate prey group, and Ammodytes sp. was the most important fish in the diet of the salmon analyzed. A range extension for Notoscopelus elongtus kroeyeri was recorded.

North American weasels: resource utilization and distribution

1979 ◽  
Vol 57 (3) ◽  
pp. 504-520 ◽  
Author(s):  
D. A. Simms
Keyword(s):  
Resource Utilization ◽  
North American ◽  
Food Habits ◽  
Feeding Habits ◽  
Habitat Preferences ◽  
Microtus Pennsylvanicus ◽  
Foraging Strategies ◽  
Meadow Voles ◽  
General Distributions ◽  
Successional Communities

A livetrapping program, augmented by enclosure experiments, was undertaken to study resource utilization by ermine (Mustela erminea) and long-tailed weasels (M. frenata) in southern Ontario. Data on food habits, habitat preferences, foraging strategies, and competitive interactions were collected. Based on this information, a theory was formulated to explain the distribution or North American weasels. Ermine fed primarily on meadow voles (Microtus pennsylvanicus) and had body diameters closely approximating those of meadow voles, enabling them to readily exploit these items in subnivean and subterranean environments. Long-tailed weasels were larger and their feeding habits were more general. Dietary overlap between the two species in areas of sympatry was 57.5%. Regarding habitat preferences, ermine selected successional communities, whereas long-tailed weasels showed no preferences. Overlap in areas of sympatry was 76.9%.Long-tailed weasels appear to be limited in their northward distribution by snow cover which restricts the size of foraging spaces, thereby conferring an advantage to the smaller weasels. Conversely, the southward distributions of ermine and least weasels (M. nivalis) appear to be limited by interference interactions with long-tailed weasels. Where ermine and least weasels are sympatric, size differences and general distributions suggest that they hunt different prey in different habitats.

scholarly journals Introduced American Bullfrog Distribution and Diets in Grand Teton National Park

2015 ◽  
Vol 38 ◽  
pp. 17-28
Author(s):  
Lauren Flynn ◽  
Tess Kreofsky ◽  
Adam Sepulveda
Keyword(s):  
National Park ◽  
Small Area ◽  
Stomach Contents ◽  
Microtus Pennsylvanicus ◽  
Large Rivers ◽  
Stream Channel ◽  
Meadow Voles ◽  
Grand Teton National Park ◽  
American Bullfrog ◽  
Floodplain Habitats

Introduced American Bullfrogs (Lithobates catesbeianus) have been present in Grand Teton National Park since approximately the 1950s, but little is known about their distribution and potential impacts. In this study, we surveyed the current bullfrog distribution and spatial overlap with sympatric native amphibians in the park, and characterized post-metamorphic bullfrog diets from July – September 2015. Despite surveys in multiple large rivers and floodplain habitats, we only documented bullfrogs in a geothermal pond and 5 km of stream channel immediately downstream of this pond. In these waters, bullfrogs overlapped with native amphibians at the downstream end of their distribution, and we did not document native amphibians in bullfrog stomach contents. Larger bullfrogs (SVL ≥ 96 mm) primarily consumed native rodents (especially meadow voles, Microtus pennsylvanicus), while smaller bullfrogs frequently consumed native invertebrates and less frequently consumed non-native invertebrates and fish. Taken together, these data indicate that the distribution and implications of the bullfrog invasion in Grand Teton National Park are currently localized to a small area, so these bullfrogs should therefore be vulnerable to eradication.

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