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1

Summer diet of the sable Martes zibellina in the Middle Yenisey taiga, Siberia

100%
Brzezinski M.
Acta Theriologica
|
1994
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tom 39
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nr 1
The summer food of the sable Martes zibellina Linnaeus, 1758, inhabiting taiga forests near Mirnoe Field Station on Middle Yenisei, Siberia, was studied by the analysis of 136 scats. Microtinae rodents (mainly northern red-backed vole Clethrio- nomys rutilus) constituted 52.3% of biomass consumed by sables. Plant food (seeds of Siberian pine Pinus sibirica and berries of Vaccinium sp.) was also frequently eaten; they occurred in 79.4% of scats but constituted only 19.9% of biomass. Shrews, burunduks Eutamias sibiricus, birds and insects were supplementary food, however, these groups of prey formed totally about 25% of consumed biomass.
2

The summer diet of moose Alces alces in Agder, south Norway - the link to fragile bones and kidney damages?

100%
Bjerga M., Mysterud A.
Acta Theriologica
|
1999
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tom 44
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nr 1
Reported cases of fragile bones and kidney damage from the Agder counties, south Norway, motivated this study of the diets of radio-collared moose Alces alces Linnaeus, 1758 during summer 1995. Birch Betula pubescens (39.8%), bilberry Vaccinium myr- tillus (13.3%), and bog asphodel Narthecium ossifragum (10.8%) were the main plants eaten, but only birch and bog asphodel were preferred when use was compared to relative availability. Bog asphodel is highly toxic and has been reported to cause severe kidney damage in domestic sheep Ouis aries and cattle Bos taurus. Hence, we hypothesized high levels of bog asphodel in the diet of moose in Agder is the link to kidney damage frequently reported from this area. However, laboratory studies have not documented damage to the skeleton from high intake of this species, and we therefore hypothesized fragile bones are caused by other factors than eating bog asphodel.
3

Summer diet of two sympatric species of raptors Upland Buzzard [Buteo hemilasius] and Eurasian Eagle Owl [Bubo bubo] in Alpine meadow: problem of coexistence

100%
Cui Q., Su J., Jiang Z.
Polish Journal of Ecology
|
2008
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tom 56
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nr 1
Summer diets of two sympatric raptors Upland Buzzards (Buteo hemilasius Temminck et Schlegel) and Eurasian Eagle Owls (Bubo bubo L. subsp. Hemachalana Hume) were studied in an alpine meadow (3250 m a.s.l.) on Qinghai- Tibet Plateau, China. Root voles Microtus oeconomus Pallas, plateau pikas Ochotona curzoniae Hodgson, Gansu pikas O. cansus Lyon and plateau zokors Myospalax baileyi Thomas were the main diet components of Upland Buzzards as identified through the pellets analysis with the frequency of 57, 20, 19 and 4%, respectively. The four rodent species also were the main diet components of Eurasian Eagle Owls basing on the pellets and prey leftovers analysis with the frequency of 53, 26, 13 and 5%, respectively. The food niche breadth indexes of Upland Buzzards and Eurasian Eagle Owls were 1.60 and 1.77 respectively (higher value of the index means the food niche of the raptor is broader), and the diet overlap index of the two raptors was larger (Cue = 0.90) (the index range from 0 – no overlap – to 1 – complete overlap). It means that the diets of Upland Buzzards and Eurasian Eagle Owls were similar (Two Related Samples Test, Z = –0.752, P = 0.452). The classical resource partitioning theory can not explain the coexistence of Upland Buzzards and Eurasian Eagle Owls in alpine meadows of Qinghai-Tibet Plateau. However, differences in body size, predation mode and activity rhythm between Upland Buzzards and Eurasian Eagle Owls may explain the coexistence of these two sympatric raptors.
4

Seasonal diet of rabbits and their browsing effect on juniper in Bugac Juniper Forest [Hungary]

80%
Matrai K., Altbacker V., Hahn I.
Acta Theriologica
|
1998
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tom 43
|
nr 1
Seasonal foods of European rabbits Oryctolagus cuniculus (Linnaeus, 1758) were studied by microhistological analysis of pellets in a protected area Bugac Juniper Forest, Hungary. Field experiments were also conducted to examine the role of rabbit foraging on common juniper Juniperus communis. The proportion of grasses, forbs and browses changed significantly throughout the seasons (p < 0.0001). Spring diet was dominated by grasses (89%), summer diet by grasses (30%) and forbs (42%), whereas in autumn grasses (60%) and browse (24%) were the main diet components. Juniper appeared only in winter diet (19%) together with other browse (60%). The high proportion of aromatic thyme Thymus glabrescens in summer diet (30%) and juniper in winter diet indicates that monoterpenoids of these plants did not keep rabbits from consumption even when other food sources were available. Planted juniper seedlings disappeared within weeks due to the browsing by rabbits.
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