Tyto diet
55902270
Barn Owl Tyto alba Diet Composition on Intensively Used Agricultural Land in the Danube Lowland
VESELOVSKY TOMAS, BACSA KRISTIAN, TULIS FILIP. 2017. Barn Owl (Tyto Alba) Diet Composition on Intensively Used Agricultural Land in the Danube Lowland. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 65(1) 0225 0233. Based on pellets analysis from five localities in south western Slovakia (Mala Muzla, Male Ripnany, Obid, Opatovsky Sokolec and Tesedikovo) we studied the diet composition of Barn Owl (Tyto alba) in intensively cultivated agricultural lands. A total of 6218 specimens of prey, 17 mammalian and 7 bird species were identified. The main prey species found in all food samples was the Common Vole (Microtus arvalis) varying between 56 and 67 The proportion of synanthropic species (Rattus norvegicus, Passer domesticus) and species inhabiting agricultural landscapes (Crocidura leucodon, Crocidura suaveolens, Mus sp. increases in localities with a lower ratio of the Common Vole. The results suggest land use affects the diet of Barn Owls, confirming conclusions which have been drawn in previous studies. From faunistic point of view, discovering the Pannonian Root Vole (Microtus oeconomus mehelyi) in the diet from Mala Muzla was important.
Tomas Veselovsky Kristian Bacsa Filip Tulis
219763934
COMPARATIVE DIET ANALYSIS OF BARN OWL (TYTO ALBA) AND LONG EARED OWL (ASIO OTUS) IN A HABITAT ISLAND IN NORTH CENTRAL TEXAS
Abstract Predator prey interactions often define the coexistence of species in space and time. In this research, we are filling a regional gap in knowledge of diet composition of the barn owl (Tyto.
Jaime E Jimenez Matthew K Jones Kaitlyn E Stoddart Sentell Dickson Abigail Chapman Jaime L Baxter-Slye Kenneth Steigman
219066742
Diet of the eastern barn owl (Tyto delicatula) in the Simpson Desert reveals significant new records and a different mammal fauna to survey data
The eastern barn owl (Tyto delicatula) is a significant native predator of small mammals in Australia. Regurgitated pellets can provide important data on species presence, current or historical changes in mammal fauna over time, or data on cryptic or threatened species. We collected 125 pellets from Cravens Peak reserve, Simpson Desert, Queensland, and examined the contents, including changes in diet over time (using age of pellet as a proxy) and the relative importance of different prey. In total, 642 unique prey items were recorded, 92% of which were mammals. Small rodents were the dominant prey Mus musculus and Pseudomys hermannsburgensis, and the presence of Notomys cf. fuscus, Pseudantechinus cf. mimulus and Dasycercus blythi were all significant, being range extensions. Such data add to more traditional or novel techniques to record community changes over time.
Alex Kutt Pippa L Kern P Schoenefuss Kerry C Moffatt Heather Janetzki David Alan Hurwood Andrew M Baker
213674679
Diet composition of introduced barn owls (Tyto alba javanica) in urban area in comparison with agriculture settings
This study investigated the diet of introduced barn owls (Tyto alba javanica, Gmelin) in the urban area of the Main Campus of Universiti Sains Malaysia, Penang, Malaysia, based on collected regurgitated pellets. We also compared the diet of the introduced barn owls with the diet of barn owls from two agricultural areas, i.e. oil palm plantations and rice fields. Pellet analysis of introduced barn owls showed that commensal Norway rats, Rattus norvegicus, made up the highest proportion of the diet (65.37% prey biomass) while common shrews, Suncus murinus were the second highest consumed prey (30.12% prey biomass) Common plantain squirrel, Callosciurus notatus, made up 4.45% of the diet while insects were taken in a relatively small amount (0.046% prey biomass) Introduced barn owls showed a preference for medium sized prey, i.e. 40 120 g (52.96% biomass and 38.71% total) In agricultural areas, rice field rats, Rattus argentiventer predominated the diet of barn owls (98.24% prey biomass) in rice fields while Malayan wood rats, Rattus tiomanicus, were the most consumed prey in oil palm plantations (99.5% prey biomass) Food niche breadth value was highest for barn owls introduced in an urban area with a value of 2.90, and 1.06 in rice fields and 1.22 in oil palm plantations. Our analysis reiterates the prey preference of barn owls in various landscapes for small mammals. Our results also indicate the suitability of utilizing barn owls as a biological control not only in agricultural areas, but also as a biological control agent for commensal rodent pests in urban areas.
Safwan Saufi Shakinah Ravindran Noor Hisham Hamid Cik Mohd Rizuan Zainal Abidin Hamdan bin Ahmad Abu Hassan Ahmad Hasber Salim
219444120
The winter diet of the rare Tyto alba in contrast to Asio otus on Crimea Peninsula
The range of Tyto alba overlaps with that of Asio otus in a large part of the Holarctic. Both species are adapted to open area hunting and prey upon similar species. In contrast to A. otus, data about the diet of T. alba on Crimea and surroundings are extremely scarce. Our study aimed to describe the prey spectrum of T. alba and evaluate at what extant its diet overlaps to that of A. otus. We evaluated diets based on 48 pellets of T. alba and 88 of A. otus collected from January to March 2018 in the Western part of the Crimea Peninsula. Simultaneously, we assessed the availability of small mammal prey by installing 150 spring loaded bar mousetraps around the collection sites. Small mammals were the main prey in the diet of T. alba and A. otus (99.2% and 100% of all individuals in pellets) The most consumed species of both species was Microtus socialis (52.3% and 74.4% of all individuals) The second most consumed species of T. alba was Crocidura leucodon, an endangered species in Crimea. The diet of T. alba was more diverse than that of A. otus (Shannon diversity Index: 1.1 and 0.76, Simpson Index: 0.51 and 0.31, respectively) However, their diets overlapped widely (Pianka's index 0.94) The frequency of mammalian prey in traps correlated moderately with that in A. otus pellets (rs 0.5, p 0.2) and it deviated from the frequency of mammalian prey in T. alba pellets (rs 0.05, p 0.9) The presence of the endangered C. leucodon in the diet of T. alba reinforce the utility of this predator species as a tool to detect threatened or rare small mammals that are not caught by traps and to increase information about their geographical distribution.
V M Kucherenko Nikolay N Tovpinets Angelina V Slavinskaya Sergey N Yakunin I S Kovalenko
89622364
Recent and subrecent diet of the barn owl (Tyto alba) in Slovakia
Abstract We completed data on the diet of the barn owl (Tyto alba) predominately from pellets for the period of the last 50 years from Slovakia. We analyzed material from 251 locations and 16 territorial units. The aggregate represents 119,231 pieces of prey from 47 species of mammals (Mammalia, 95.7% and 58 species of birds (Aves, 3.9% with a small representation of amphibians, reptiles (Amphibia and Reptilia, 0.2% and invertebrates (Invertebrata, 0.2% The obtaining of food among the owls is limited to synanthropic environments and the surrounding agricultural landscape, and the centre of its distribution in the recent period (i.e. the past 50 years: 1965 201 5) has been concentrated mainly on the southern parts of Slovakia. In this environment the common vole (Microtus arvalis, 59.6% is the primary prey. Additional prey are rodents of the family Muridae: Mus musculus (5.6% Micromys minutus (2.2% Apodemus microps (2.2% A. flavicollis (2.0% A. sylvaticus (1 .6% and A. agrarius (1 .5% insectivores of the family Soricidae: Sorex araneus (6.2% S. minutus (2.4% Crocidura leucodon (4.8% and C. suaveolens (2.8% and the house sparrow Passer domesticus (2.9% In the higher situated Turcianska kotlina Basin the species M. arvalis (74.3% has higher domination, and instead of the white toothed shrews the water shrews Neomys anomalus (2.8% and N. fodiens (1 .3% are more abundantly represented. In 3 localities owls focused on hunting bats; for example, in the church in Ratkova the order Chiroptera made up 35.2% of prey. From the subrecent period (i.e. from before more than 50 years ago) we evaluate 4 samples from the territory of Slovakia with 15,601 pieces of prey ofT. alba. Before more than 50 years ago owls were also more abundantly represented at higher elevations in Slovakia, evidence of which is Weisz's collection of pellets from 1 6 localities in the Ondavska vrchovina Upland in the years 1945 to 1963, but also a registry of data from the 19th and 20th centuries from higher located basins. In 4 samples of food from the subrecent period diversity in the representation of owl prey is higher, accompanied by low domination ofM. arvalis and a more abundant representation of murids from the genera Mus and Apodemus. The oldest sample, dated to the 16th century, is from a church in Zilina Rudiny
Jan Obuch Stefan Danko Michal Noga
89172902
DIET OF THE BARN OWL (Tyto alba SCOPOLI 1769) FROM THE COPIAPO VALLEY, ATACAMA DESERT, CHILE
SUMMARY The Barn Owl (Tyto alba) is a nocturnal raptor species distributed from Arica to Tierra del Fuego in Chile. The diet of this bird is the best known of any raptor of Chile; it is based on small vertebrates, particularly rodents and birds. We studied the diet of the Barn Owl, by analyzing of pellets collected in Copiapo valley, located in the hyper arid Atacama Desert. This information was compared to available data from Chile and neighboring countries. Because of the environmental conditions of extreme aridity a low diversity of prey, typical of raptors from arid ecosystems, was expected. In the case of Tyto alba populations from the Atacama region, the most consumed species were rodents (76.7% specially Eligmodontia dunaris (27.3% Phyllotis darwini (24% and Abrocoma bennetti (12.4% Other preys corresponded to birds (17.8% and coleopterans (3.3% There was no significant correlation be tween frequency of prey and their body mass (r 2 0.229, p= 0.497) and between frequency of prey and their habitat (r 2 0.538, p= 0.088) indicating that this raptor does not select its preys by either body size or habitat. Regarding biomass, rodents contributed more significantly (95.3% than birds (3.5% with the largest individual contribution given by A. bennetti (60.1% and P. darwini (26.8% Both the Simpson (SI 0.1683) and Shannon (H' 0.8958) indices indicate that this species consumes a low diversity of prey, which is consistent with the observations for others raptors inhabiting on arid environments.
Pablo Valladares Faundez Natalia Urrutia Osorio Nicole Alvarez Henriquez Osman Orellana Orozco Sergio Alvarado Orellana
88813256
Diet of the Lesser Antillean barn owl Tyto insularis (Aves: Strigiformes) in Dominica, Lesser Antilles
Abstract. This study presents new information on the diet of Tyto insularis in Dominica, Lesser Antilles. The study of 57 pellets and bulk material collected in 1999 (23) and 2000 (34) contained 517 prey items of relatively high diversity. These included squamates (2 species) rodents (2 species) bats (7 species) birds (17 identified taxa and several unidentified Passeriformes) and insects. Although our inferences stem a few owls, results suggested that the diet of T. insularis in Dominica is similar to the diet of T. glaucops in Hispaniola.
Caribbean Journal of Science
Emmanuelle Stoetzel A Fraysse Sandrine Grouard Corentin Bochaton Monica Gala Arnaud Lenoble Christiane Denys
89524370
Notes on the Diet of the Barn Owl Tyto alba in New South Wales
The diet of the Barn Owl Tyto alba in New South Wales was examined by the analysis of pellets (2 sites, n 9) pellet material (2 sites) and the stomach contents of owls found dead on roads (10 sites, n 10) and away from roads (5 sites, n 6) The introduced House Mouse Mus domesticus was by far the predominant prey item, although a small bat Vespadelus sp. native and introduced rats Rattus spp. dasyurid marsupials Planigale Sminthopsis and Antichinus spp. a juvenile Cat Felis catus birds and invertebrates were represented. The stomachs of owls found dead away from roads were empty; autopsies of those owls suggested poisoning by anticoagulant rodenticides.
A B Rose
55481268
Diet of Barn Owl Tyto alba in Central South Bulgaria as influenced by landscape structure
This study of the diet of Barn Owl Tyto alba analyzed pellets containing 18,810 prey specimens. Small mammals (98.2% by number, 97.5% by biomass) dominated, while birds, reptiles, amphibians, and insects constituted a negligible portion of the diet (1.8% by number, 2.5% by biomass) Voles (Microtus spp. were the most numerous prey (35.3 14.4% range 14.6% 67.1% in 9 localities (69.2% n 13 individually studied localities) and dominated the biomass in all diets (51.4 14.1% range 27.4% 78.2% The lesser white toothed shrew (Crocidura suaveolens) (20.8 7.6% range 7.3% 32.8% was the most frequent prey in the other 4 localities (30.8% The breeding localities with more similar proportions of habitats in their hunting territories had significantly higher diet overlaps (r 0.336, P 0.01) The amount of wetlands and the indices of habitat heterogeneity and topographic relief among the landscape characteristics of the hunting territories significantly influenced diet composition according to redundancy analysis. Larger areas of wetlands correlated with higher predation on wetland mammal species, as well as the European pine vole (Microtus subterraneus) and white toothed shrews, and thus with broader food niche breadth.
Boyan Milchev