scholarly journals Adatok Somogy megye kisemlős fajainak elterjedéséhez, gyöngybagoly Tyto alba (Scopoli, 1769) köpetek vizsgálata alapján

2016 ◽  
pp. 91-108
Author(s):  
Jenő Purger J.
Keyword(s):  
Sorex Araneus ◽  
Myodes Glareolus ◽  
Tyto Alba ◽  
Mammal Species ◽  
Arvicola Amphibius ◽  
Nyctalus Leisleri ◽  
Talpa Europaea ◽  
Mustela Nivalis ◽  
Barn Owls ◽  
Owl Pellets

Pellets were collected between 1995 and 2016, from 53 localities (investigated area: XL89, XL99, YL08, YL09, XM52, XM61, XM62, XM70, XM72, XM74, XM80, XM81, XM82, XM83, XM84, XM90, XM91, XM93, XM95, YM02, YM03, YM12, YM13, YM14, YM22, YM23, YM24 and BS73, according to 10×10 km UTM grids). In a total of 5164 Barn Owl pellets 14360 prey remnants were found. In the diet of Barn Owls small mammals dominated (98.6%). From the prey items the presence of 27 mammal species (Croci-dura leucodon, C. suaveolens, Sorex araneus, S. minutus, Neomys anomalus, N. fodiens, Talpa europaea, Eptesi-cus serotinus, Nyctalus leisleri, N. noctula, Myotis myotis, Muscardinus avellanarius, Microtus agrestis, M. arvalis, M. subterraneus, Arvicola amphibius, Myodes glareolus, Apo-demus agrarius, A. flavicollis, A. sylvaticus, A. uralensis, Micromys minutus, Mus musculus, M. spicilegus, Rattus norvegicus, R. rattus, Mustela nivalis) was confirmed. Rem-nants of birds, amphibians and insects made up only 1.4% of total prey.

scholarly journals Kisemlősök faunisztikai felmérése Somogy megye északkeleti részén, gyöngybagoly Tyto alba (Scopoli, 1769) köpetek vizsgálata alapján

2013 ◽  
pp. 81-90
Author(s):  
J. Jenő Purger
Keyword(s):  
Rattus Norvegicus ◽  
Sorex Araneus ◽  
Myodes Glareolus ◽  
Tyto Alba ◽  
Mammal Species ◽  
Arvicola Amphibius ◽  
Eptesicus Serotinus ◽  
Micromys Minutus ◽  
Muscardinus Avellanarius ◽  
Owl Pellets

Pellets were collected between 1999 and 2009, from 20 localities (investigated area: BT80, BS79, BS78, BS77, BS89 and BS88, according to 10×10 km UTM grids). In a total of 1570 Barn Owl pellets there were 4127 prey rem-nants. Small mammals were dominating (97.8%). 22 mammal species were evidented: Crocidura leucodon, C. suaveolens, Sorex araneus, S. minutus, Neomys anomalus, Talpa euro-paea, Eptesicus serotinus, Muscardinus avellanarius, Microtus agrestis, M. arvalis, M. oeconomus, M. subterraneus, Arvicola amphibius, Myodes glareolus, Apodemus agrarius, A. flavicol-lis, A. sylvaticus, A. uralensis, Micromys minutus, Mus mus-culus, M. spicilegus, Rattus norvegicus). Remnants of birds, amphibians and insects consisted 2.2 % of total prey.

scholarly journals Kisemlősök faunisztikai felmérése Külső-Somogy északnyugati részén, gyöngybagoly Tyto alba (Scopoli, 1769) köpetek vizsgálata alapján

2014 ◽  
pp. 105-112
Author(s):  
J. Jenő Purger J.
Keyword(s):  
Rattus Norvegicus ◽  
Sorex Araneus ◽  
Myodes Glareolus ◽  
Tyto Alba ◽  
Mammal Species ◽  
Talpa Europaea ◽  
Eptesicus Serotinus ◽  
Micromys Minutus ◽  
Muscardinus Avellanarius ◽  
Owl Pellets

Barn Owl pellets were collected between 1999 and 2014, from 11 localities (investigated area: YM07, YM18, YM27 and YM29, according to 10×10 km UTM grids). In a total of 1313 pellets there were 3630 prey remnants. Small mammals were dominating (98.4%). We documented occur-rence of 25 mammal species: Crocidura leucodon, C. sua-veolens, Sorex araneus, S. minutus, Neomys anomalus, N. fodiens, Talpa europaea, Eptesicus serotinus,Pipistrellus na-thusii, Muscardinus avellanarius, Glis glis, Microtus agrestis, M. arvalis, M. oeconomus, M. subterraneus, Arvicola amphi-bius, Myodes glareolus, Apodemus agrarius, A. flavicollis, A. sylvaticus, A. uralensis, Micromys minutus, Mus musculus, M. spicilegus, Rattus norvegicus). Remnants of birds and am-phibians consisted 1.6% of total prey.

An attempt to determine the size of the Common Barn-owl’s (Tyto alba) hunting area based on its prey composition

2021 ◽  
pp. 175815592110660
Author(s):  
Jenő J Purger ◽  
Dávid Szép
Keyword(s):  
Functional Groups ◽  
Small Mammals ◽  
Small Mammal ◽  
Barn Owl ◽  
Tyto Alba ◽  
Mammal Species ◽  
Open Forest ◽  
Prey Composition ◽  
Small Mammal Species ◽  
Owl Pellets

The relative abundance of small mammal species detected from Common Barn-owl pellets reflects the landscape structure and habitat pattern of the owl’s hunting area, but it is also affected by the size of the collected pellet sample and the size of the supposed hunting area. The questions arise: how many pellets should be collected and analyzed as well as how large hunting area should be taken into consideration in order to reach the best correspondence between the owl’s prey composition and the distribution of habitats preferred by small mammals preyed in supposed hunting areas? For this study, we collected 1045 Common Barn-owl pellets in a village in southern Hungary. All detected small mammal species were classified into functional groups (guilds) preferring urban, open, forest and wetland habitats. The proportion of functional groups was compared to the proportion of these habitats around the pellet collection site within circles of one, two, and three km radius. Saturation curves showed that at least 300 pellets or ca. 600 mammalian remains are required for the detection of the 19 small mammal species. The share of small mammals detected in the prey and their functional groups according to their habitat preference showed an increasing consistency with the distribution of real habitats in the potential hunting area of a radius of 3 km around the owl’s breeding or resting place.

Diets of native and introduced apex predators in Hawai'i

2018 ◽  
Vol 24 (1) ◽  
pp. 25
Author(s):  
Carolyn S. Mostello ◽  
Sheila Conant
Keyword(s):  
Barn Owl ◽  
Tyto Alba ◽  
Apex Predators ◽  
Mammal Species ◽  
Feral Cat ◽  
Arthropod Species ◽  
Significant Difference ◽  
Before And After ◽  
Asio Flammeus ◽  
Barn Owls

We report here on the diets of four apex predators in Hawai‘i: the native pueo or Hawaiian short-eared owl (Asio flammeus sandwichensis) and three introduced species, the barn owl (Tyto alba pratincola), the feral cat (Felis catus) and the small Indian mongoose (Herpestes javanicus). To better understand dietary relationships between these predators, we studied diet, focusing on areas where they occur together. We collected disgorged owl pellets, and cat and mongoose faecal scats from eight areas located on five of the main Hawaiian Islands and identified prey items to the lowest possible taxonomic level. All species consumed rodents, birds, and arthropods, and the mammal species also included plants in their diets. The two owl species and the cat preyed primarily on rodents, whereas small cockroaches predominated in the diet of the mongoose. Diets of the owl species and the cat, but not the mongoose, varied significantly between areas. Dietary overlap was highest between the pueo and the barn owl and lowest between the owl species and the mongoose. Although barn owls took more rats than pueo, there was no evidence that the two owl species partitioned house mouse prey by size. On islands where there are no mongoose, both owls took a greater proportion of large arthropods in their diet, suggesting that mongoose reduced the abundance of the arthropod species that owls commonly took. There was no significant difference in pueo diets before and after introduction of the barn owl.

scholarly journals Habitat associations of small mammals in southern Brazil and use of regurgitated pellets of birds of prey for inventorying a local fauna

2007 ◽  
Vol 67 (4) ◽  
pp. 619-625 ◽  
Author(s):  
DR. Scheibler ◽  
AU. Christoff
Keyword(s):  
Small Mammals ◽  
Small Mammal ◽  
Rattus Rattus ◽  
Habitat Associations ◽  
Native Forest ◽  
Forest Fragments ◽  
Tyto Alba ◽  
Southern Brazil ◽  
Mammal Species ◽  
Barn Owls

We inventoried terrestrial small mammals in an agricultural area in southern Brazil by using trapping and prey consumed by Barn Owls (Tyto alba) and White-tailed Kites (Elanus leucurus). Small mammals were trapped in three habitat types: corn fields, uncultivated fields ("capoeiras"), and native forest fragments. A total of 1,975 small mammal specimens were trapped, another 2,062 identified from the diet of Barn Owls, and 2,066 from the diet of White-tailed Kites. Both trapping and prey in the predators' diet yielded 18 small mammal species: three marsupials (Didelphis albiventris, Gracilinanus agilis, and Monodelphis dimidiata) and 15 rodents (Akodon paranaensis, Bruceppatersonius iheringi, Calomys sp., Cavia aperea, Euryzygomatomys spinosus, Holochilus brasiliensis, Mus musculus, Necromys lasiurus, Nectomys squamipes, Oligoryzomys nigripes, Oryzomys angouya, Oxymycterus sp.1, Oxymycterus sp.2, Rattus norvegicus, and Rattus rattus (Linnaeus, 1758)). The greatest richness was found in the uncultivated habitat. We concluded that the three methods studied for inventorying small mammals (prey in the diet of Barn Owls, White-tailed Kites, and trapping) were complementary, since together, rather than separately, they produced a better picture of local richness.

scholarly journals Small mammals in the diet of owls in the Masovian Landscape Park and its adjacent areas

2016 ◽  
Vol 59 (2) ◽  
pp. 73-86
Author(s):  
Grzegorz LESIŃSKI ◽  
◽  
Przemysław STOLARZ ◽  
Jakub GRYZ ◽  
Radosław DĄBROWSKI ◽  
...  
Keyword(s):  
Small Mammal ◽  
Sorex Araneus ◽  
Myodes Glareolus ◽  
Tyto Alba ◽  
Apodemus Flavicollis ◽  
Microtus Arvalis ◽  
Strix Aluco ◽  
Small Mammal Communities ◽  
Mammal Communities ◽  
Muscardinus Avellanarius

The diet of three owl species was analysed in 32 sites localised in the Masovian Landscape Park and its outskirts to determine the structure of small mammal communities. Study was done in the years 1993–2016, 5,728 vertebrate prey (including 4,001 mammals) were collected. Five species of soricomorphs, six bats, 14 rodents and one species of Carnivora were found. Among mammals, Myodes glareolus had the greatest share in the diet of Strix aluco. Tyto alba most frequently caught Microtus arvalis and Sorex araneus, while Asio otus – M. arvalis and M. oeconomus. Those prey, together with Apodemus flavicollis and A. agrarius, dominated in small mammal communities. One site of Crocidura leucodon was found on the western edge of its range in Poland. The share of bats in the diet of S. aluco was small (0.5% of mammals), Plecotus auritus was most frequent. Muscardinus avellanarius was found in forests of the southern part of the Masovian Landscape Park. It was relatively often caught by S. aluco in favourable habitats. Shares of M. oeconomus, M. agrestis and M. avellanarius in the diet of owls were significantly higher in southern part of the study area remote from Warsaw.

scholarly journals The prey composition of the Barn Owl (Tyto alba) with respect to landscape structure of its hunting area (Zala County, Hungary)

2017 ◽  
Vol 25 (2) ◽  
pp. 51-64
Author(s):  
Dávid Szép ◽  
Ákos Klein ◽  
Jenő J. Purger
Keyword(s):  
Relative Abundance ◽  
Small Mammal ◽  
Landscape Structure ◽  
Barn Owl ◽  
Tyto Alba ◽  
Mammal Species ◽  
Prey Composition ◽  
Barn Owls ◽  
Landscape Patches ◽  
Small Mammal Species

Abstract The prey composition of the Barn Owl (Tyto alba) can be monitored indirectly by pellet analysis and we used this method to investigate less known small mammal species of Zala County. The number and abundance of small mammal species depend on the structure of the landscape of Barn Owls’ hunting area, therefore we analysed landscape features in the surrounding circles with 2 km radius around the sampling sites. In 2016 we collected 1106 pellets from 13 sampling localities. From the pellets we identified 21 species of 3022 individuals of small mammals (more than 98% of prey). Among the 21 species there was the rare Parti-colured Bat (Vespertilio murinus) and a new species for the county the Steppe Mouse (Mus spicilegus). Positive correlation was found between the diversity of the small mammal fauna of each sampling site and the landscape complexity (number of the landscape patches) of the Barn Owl hunting area. Relative abundance of the Wood Mouse (Apodemus sylvaticus) showed positive correlation with the number of landscape patches, while the abundance of the Lesser White-toothed Shrew (Crocidura suaveolens), the Miller’s Water Shrew (Neomys anomalus), the Striped Field Mouse (Apodemus agrarius) and the Harvest Mouse (Micromys minutus) was higher in hunting areas with more homogenous landscapes. Significant correlations were found between the relative abundance of some small mammal species and the landscape structure of the potential hunting area of owls that confirmed the consistency in habitat preference of some species. Our results proved that the prey-composition of Barn Owls reflects the land use through the distribution and abundance of small mammal species, therefore this method is suitable for ecological analyses of landscape.

scholarly journals Small mammals in the diet of Barn Owls (Tyto furcata) in an urban area in Rio de Janeiro state, Brazil, with a new record of the dwarf mouse opossum (Cryptonanus)

2022 ◽  
Vol 82 ◽  
Author(s):  
A. J. Almeida ◽  
R. R. Ribeiro ◽  
J. A. Maia-Júnior ◽  
V. C. Silva ◽  
I. C. V. Borges ◽  
...  
Keyword(s):  
Urban Area ◽  
Atlantic Forest ◽  
Small Mammals ◽  
Small Mammal ◽  
Rio De Janeiro ◽  
New Record ◽  
Dwarf Mouse ◽  
Mammal Species ◽  
Barn Owls ◽  
Owl Pellets

Abstract Several studies emphasize the use of owl pellets in small mammal inventories in natural areas harboring high richness of rare species, but few Brazilian Atlantic forest localities have been surveyed by this method. The present study documents the species composition and abundance of small mammals in the diet of Tyto furcata in an urban area of the municipality of Campos dos Goytacazes, Rio de Janeiro, Brazil, remarking on a new record of the dwarf mouse opossum genus Cryptonanus in the Atlantic forest. We analyzed 265 pellets regurgitated by a pair of T. furcata from November 2016 to September 2017 found in a nesting box. Analysis of the samples enabled finding a total of 596 individuals of four small mammal species. Mus musculus was predominant among the prey items (98.3%), while the native rodents Necromys lasiurus (1.3%) and Holochilus brasiliensis (0,17%) were much rarer. A single specimen of Cryptonanus sp. was identified among the diet items based on distinctive dental characters. The identification of this genus in the present study represents the second record in the state of Rio de Janeiro, and the sixth in the Atlantic Forest biome, suggesting that this marsupial occupies a wider ecological and biogeographic range. The present study underscores the relevance of owl pellets for small mammal surveys, even in urban and highly disturbed areas.

Taphonomic investigations of owl pellets

Paleobiology ◽  
1979 ◽  
Vol 5 (3) ◽  
pp. 275-284 ◽  
Author(s):  
Peter Dodson ◽  
Diane Wexlar
Keyword(s):  
Fossil Record ◽  
Prey Species ◽  
Bone Destruction ◽  
Tyto Alba ◽  
Bubo Virginianus ◽  
Caudal Portion ◽  
Barn Owls ◽  
Small Bones ◽  
Species Specific ◽  
Owl Pellets

Owls are important consumers of small vertebrates, and because they regurgitate pellets rich in bone, they may be important potential contributors of the concentrated remains of small vertebrates to the fossil record. Owls of three sizes, the large great horned owl (Bubo virginianus), the medium-sized barn owl (Tyto alba), and the small screech owl (Otus asio), were fed a common diet of mice. The bony contents of the pellets were analyzed to determine the amount of bone loss by digestion, bone completeness, and sites of bone breakage. For all three species, only about half the number of bones ingested were recovered in the pellets. Mandibles and femora were most abundant, and pelves and scapulae were the least abundant. Screech owls broke 80% of the cranial and limb elements, barn owls only 30%. Skulls fared poorly in great horned and screech owl pellets, while barn owls returned 80% of the skulls intact, with only the caudal portion of the cranium damaged; barn owls also returned articulated strings of vertebrae and complete paws. These results provide a baseline for the recognition of owls as agents of accumulation of small bones in the fossil record and suggest that the actions of ancient predators may be revealed by species-specific patterns of bone destruction of an assemblage of fossil prey species.

scholarly journals Contamination by neonicotinoid insecticides in barn owls (Tyto alba) and Alpine swifts (Tachymarptis melba)

2021 ◽  
Vol 785 ◽  
pp. 147403
Author(s):  
Ségolène Humann-Guilleminot ◽  
Shirley Laurent ◽  
Pierre Bize ◽  
Alexandre Roulin ◽  
Gaétan Glauser ◽  
...  
Keyword(s):  
Tyto Alba ◽  
Neonicotinoid Insecticides ◽  
Barn Owls
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