Does prey abundance affect prey size selection by the Eagle Owl (Bubo bubo)?

2021 ◽  
Author(s):  
Jorge Tobajas ◽  
Carlos Rouco ◽  
Javier Fernandez-de-Simon ◽  
Francisco Díaz-Ruiz ◽  
Francisca Castro ◽  
...  
Keyword(s):  
Prey Size ◽  
Prey Abundance ◽  
Bubo Bubo ◽  
Size Selection ◽  
Eagle Owl

scholarly journals Prey size as a critical factor for bird bone taphonomy in Eagle Owl (Bubo bubo) pellets

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Anna Rufà ◽  
Véronique Laroulandie
Keyword(s):  
Prey Size ◽  
Critical Factor ◽  
Accurate Diagnosis ◽  
Bone Architecture ◽  
Archaeological Sites ◽  
Bubo Bubo ◽  
The Real ◽  
Small Prey ◽  
Bone Damage ◽  
Eagle Owl

AbstractEach predator hunts and consumes its prey in a particular way. Consequently, the traces left by predators on bones might vary according to the manner in which the prey are processed. For this reason, prey size has been proposed as a key issue that affects the damage inflicted on bones. The Eagle Owl (Bubo bubo) is one of the main potential predators of small prey found in archaeological sites. However, detailed taphonomic research describing bone accumulations produced by this nocturnal raptor is still scarce. The aim of the present work is to describe a modern accumulation of pellets originated by the Eagle Owl from this perspective, with a specific focus on birds. Particular attention is paid to prey size to evaluate the real significance of this variable when assessing bone damage. The results confirm that bone alterations reflect how prey was ingested, as the bones show greater damage with increasing prey size. This finding emphasises the complexity of characterising archaeological accumulations, as the alterations will vary according to prey size. In addition, bone architecture—or other aspects that cannot be controlled—may hinder accurate diagnosis and should be taken into account.

scholarly journals Prey-size selection by freshwater flagellated protozoa

1990 ◽  
Vol 35 (7) ◽  
pp. 1429-1436 ◽  
Author(s):  
Thomas H. Chrzanowski ◽  
Karel Šimek
Keyword(s):  
Prey Size ◽  
Size Selection

scholarly journals Brood-switching in Eagle Owl Bubo bubo fledglings

Ibis ◽  
2008 ◽  
Vol 150 (4) ◽  
pp. 816-819 ◽  
Author(s):  
VINCENZO PENTERIANI ◽  
MARÍA DEL MAR DELGADO
Keyword(s):  
Bubo Bubo ◽  
Eagle Owl

scholarly journals Changes in the Eurasian eagle-owl (Bubo bubo) population in Czechia and their association with legal protection

2020 ◽  
Vol 14 (1) ◽  
pp. 29-44
Author(s):  
Jan Andreska ◽  
Dominik Andreska
Keyword(s):  
20Th Century ◽  
Legal Protection ◽  
Legal Regulation ◽  
Birds Of Prey ◽  
Early 20Th Century ◽  
Nature Protection ◽  
Predator Species ◽  
Bubo Bubo ◽  
Eagle Owl ◽  
Live Bait

Abstract The article deals with trends in the Eurasian eagle-owl (Bubo bubo) population in Czechia and the interplay between legal regulation of hunting and nature protection. In the early 20th century, the eagle-owl population in Bohemia decreased to an estimated 20 nesting pairs, and the population in Moravia and Silesia was subsequently estimated to be similarly low. In previous centuries, eagle-owls had been persecuted as pest animals; additionally, their chicks were picked from nests to be kept by hunters for the eagle-owl lure hunting method (“výrovka” in Czech), where they were used as live bait to attract corvids and birds of prey, which were subsequently killed by shooting. As soon as the state of the eagle-owl population was established in the 1900s, the effort to save the autochthonous eagle-owl population commenced. Nevertheless, when eagle-owls became legally protected from killing in the 1930s, the eagle-owl lure hunting method was not prohibited. The intensified use of this hunting method in the 1950s was accompanied by serious decline in the populations of birds of prey in the Czech countryside, when tens of thousands of Eurasian sparrowhawks (Accipiter nisus), northern goshawks (Accipiter gentilis), common buzzards (Buteo buteo) and rough-legged buzzards (B. lagopus) were killed on a yearly basis. The usage of eagle-owl chicks in lure hunting was criticised by ornithologists concerned with the conservation of birds of prey. The eagle-owl thus became a subject of more general debate on the role of predators in nature, and this debate (albeit regarding other predator species) has continued to the present-day. As the eagle-owl population has been growing steadily following the prohibition of its killing in the 1930s, its story may serve as an example of the need for effective legal protection of predators to ensure their survival in the intensively exploited central-European environment. The article examines the successful preserving of the eagle-owl in the Czech countryside, from its low point in the early 20th century towards today’s stable and ever-increasing population, focusing on environmental, conservationist, legal and societal aspects of the issue.

scholarly journals Preliminary study on the tolerance to human disturbance of Eagle Owl (Bubo bubo) in an active quarry in NW Hungary

2018 ◽  
Vol 26 (1) ◽  
pp. 54-64
Author(s):  
Mátyás Prommer ◽  
I. Lotár Molnár ◽  
Barna Tarján ◽  
Botond Kertész
Keyword(s):  
Home Range ◽  
Human Activities ◽  
Economic Interests ◽  
Bubo Bubo ◽  
Nest Sites ◽  
Specific Guideline ◽  
Eagle Owl ◽  
Preliminary Study ◽  
Species Specific ◽  
New Habitats

Abstract Population of the Eagle Owl (Bubo bubo) has been increasing in Europe including Hungary. The species occupy new habitats beside its ancient territories including quarries and buildings. This may result in conflicting conservation and economic interests in active quarries. Because eagle owls are strictly protected in Hungary, human activities around known nest sites require environmental permits. We aimed to obtain information on Eagle Owl behaviour in an operating quarry by tracking an adult female to base a future species-specific guideline to issue environmental permits for mining in quarries. We used a combined GPS-GSM and VHF telemetry. We found that the tracked female did not breed in the study year but remained in her home range during the study period. By studying her seasonal and daily patterns of movements, we found that she was not disturbed by regular human activities under the nesting cliff, but she was more sensitive to unexpected non-regular disturbance. Based on the satellite-tracking data, this specimen used an approximately 18 km2 home range during the study period.

scholarly journals The importance of visual markings in night birds. The case of the Eagle Owl, Bubo bubo

2012 ◽  
Vol 82 (1/2) ◽  
Author(s):  
Vincenzo Penteriani ◽  
Maria Del Mar Delgado ◽  
Paola Bartolommei
Keyword(s):  
Bubo Bubo ◽  
Eagle Owl
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