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

scholarly journals Nidicolous beetle species richness is driven by Barn Owl’s nests occupancy and landscape structure

2021 ◽  
Author(s):  
Vivien Cosandey ◽  
Robin Séchaud ◽  
Paul Béziers ◽  
Yannick Chittaro ◽  
Andreas Sanchez ◽  
...  
Keyword(s):  
Species Richness ◽  
Landscape Structure ◽  
Barn Owl ◽  
Arthropod Community ◽  
Tyto Alba ◽  
Nest Material ◽  
Crop Fields ◽  
Nest Boxes ◽  
Bird Droppings ◽  
Barn Owls

AbstractBird nests are specialized habitats because of their particular composition including nest detritus and bird droppings. In consequence, they attract a specialized arthropod community considered as nidicolous, which includes species only found in bird nests (strictly nidicolous) or sometimes found in bird nests (facultatively nidicolous). Because the factors influencing the entomofauna in bird nests are poorly understood, in autumn 2019, we collected nest material in 86 Barn Owl (Tyto alba) nest boxes. We investigated whether the invertebrate species richness was related to Barn Owl nest box occupancy, the density of available nest boxes and the landscape structure. We found 3,321 nidicolous beetle specimens belonging to 24 species. Species richness of strictly nidicolous beetles was 2.7 times higher in nest boxes occupied by a family of Barn Owls the previous spring compared to unoccupied nest boxes. It was also higher in sites that were more often occupied by Barn Owls in the five previous years and in areas surrounded by a higher proportion of crop fields. For facultatively nidicolous beetles, the density of Barn Owl nest boxes enhanced the species richness. In conclusion, our study suggests that the strictly nidicolous beetles benefit from occupied nest boxes of Barn Owls, whereas facultatively nidicolous beetles look for nest boxes independently of whether Barn Owls occupy them. Our study highlights the importance of bird nests for a suite of invertebrates.

Diet of Barn Owls (Tyto alba) in Northern Belize

2009 ◽  
Vol 54 (1) ◽  
pp. 104-107 ◽  
Author(s):  
Steven G. Platt ◽  
Thomas R. Rainwater ◽  
Daniel J. Leavitt ◽  
Stanlee M. Miller
Keyword(s):  
Tyto Alba ◽  
Barn Owls

scholarly journals Diet of rural breeding Barn Owls Tyto alba (Scopoli, 1769) in Madurai, southern India

2014 ◽  
Vol 6 (9) ◽  
pp. 6204-6213
Author(s):  
A. Mohamed Samsoor Ali ◽  
R. Santhanakrishnan
Keyword(s):  
Southern India ◽  
Tyto Alba ◽  
Barn Owls

scholarly journals Communally breeding female Barn Owls Tyto alba are not related and do not invest similarly in the communal family

Bird Study ◽  
2019 ◽  
Vol 66 (4) ◽  
pp. 570-573
Author(s):  
Robin Séchaud ◽  
Ana Paula Machado ◽  
Kim Schalcher ◽  
Céline Simon ◽  
Alexandre Roulin
Keyword(s):  
Tyto Alba ◽  
Breeding Female ◽  
Barn Owls

scholarly journals Developmental Changes Underlying the Formation of the Specialized Time Coding Circuits in Barn Owls (Tyto alba)

2002 ◽  
Vol 22 (17) ◽  
pp. 7671-7679 ◽  
Author(s):  
M. Fabiana Kubke ◽  
Dino P. Massoglia ◽  
Catherine E. Carr
Keyword(s):  
Developmental Changes ◽  
Tyto Alba ◽  
Barn Owls ◽  
Time Coding

scholarly journals Self-motion trajectories can facilitate orientation-based figure-ground segregation

2020 ◽  
Vol 123 (3) ◽  
pp. 912-926
Author(s):  
Arkadeb Dutta ◽  
Tidhar Lev-Ari ◽  
Ouriel Barzilay ◽  
Rotem Mairon ◽  
Alon Wolf ◽  
...  
Keyword(s):  
Receptive Fields ◽  
Visual Outcome ◽  
Neural Response ◽  
Head Movements ◽  
Essential Property ◽  
Wide Field ◽  
Tyto Alba ◽  
Dominant Orientation ◽  
Barn Owls ◽  
Detection Of Objects

Segregation of objects from the background is a basic and essential property of the visual system. We studied the neural detection of objects defined by orientation difference from background in barn owls ( Tyto alba). We presented wide-field displays of densely packed stripes with a dominant orientation. Visual objects were created by orienting a circular patch differently from the background. In head-fixed conditions, neurons in both tecto- and thalamofugal visual pathways (optic tectum and visual Wulst) were weakly responsive to these objects in their receptive fields. However, notably, in freely viewing conditions, barn owls occasionally perform peculiar side-to-side head motions (peering) when scanning the environment. In the second part of the study we thus recorded the neural response from head-fixed owls while the visual displays replicated the peering conditions; i.e., the displays (objects and backgrounds) were shifted along trajectories that induced a retinal motion identical to sampled peering motions during viewing of a static object. These conditions induced dramatic neural responses to the objects, in the very same neurons that where unresponsive to the objects in static displays. By reverting to circular motions of the display, we show that the pattern of the neural response is mostly shaped by the orientation of the background relative to motion and not the orientation of the object. Thus our findings provide evidence that peering and/or other self-motions can facilitate orientation-based figure-ground segregation through interaction with inhibition from the surround. NEW & NOTEWORTHY Animals frequently move their sensory organs and thereby create motion cues that can enhance object segregation from background. We address a special example of such active sensing, in barn owls. When scanning the environment, barn owls occasionally perform small-amplitude side-to-side head movements called peering. We show that the visual outcome of such peering movements elicit neural detection of objects that are rotated from the dominant orientation of the background scene and which are otherwise mostly undetected. These results suggest a novel role for self-motions in sensing objects that break the regular orientation of elements in the scene.

Effects of environmental temperature on thyroid hormones in the barn owl (Tyto alba)

2006 ◽  
Vol 54 (3) ◽  
pp. 321-331 ◽  
Author(s):  
Á. Klein ◽  
Margit Kulcsár ◽  
Virág Krízsik ◽  
R. Mátics ◽  
P. Rudas ◽  
...  
Keyword(s):  
Plasma Level ◽  
Thyroid Hormones ◽  
Environmental Temperature ◽  
Barn Owl ◽  
Breeding Period ◽  
Tyto Alba ◽  
Lower Plasma ◽  
Cell Level ◽  
Trh Stimulation ◽  
Barn Owls

The basic patterns of thyroid hormones [thyroxine (T4) and 3,3',5-triiodothyronine (T3)] and the T4 and T3 responses induced by thyrotropin releasing hormone (TRH) are reported in captive female barn owls (Tyto alba) during the non-breeding period. The main findings of the study, conducted on a total of 10 owls, are as follow: (1) The thyroid gland of barn owl can be stimulated by the classical TRH stimulation test. (2) T3 response was much more pronounced both under cold (around 10°C) and warm (around 20°C) conditions, whereas T4 response ranged so widely that we could not point out any significant change in it. (3) Basal T3 plasma level was significantly (p = 0.036) higher in birds exposed to cold temperature, and they responded to TRH treatment with a lower plasma T3 elevation than the birds kept in a warm chamber. This pattern, however, cannot be explained by increased food intake, but is in agreement with the fact that enhanced T3 level may account for higher avUCP mRNA expression, which results in higher heat production on the cell level. From the results it is concluded that altering T3 plasma level plays a significant role in cold-induced thermoregulation.

Trichomonosis due to Trichomonas gallinae infection in barn owls (Tyto alba) and barred owls (Strix varia) from the eastern United States

2019 ◽  
Vol 16 ◽  
pp. 100281
Author(s):  
Kevin D. Niedringhaus ◽  
Holly J. Burchfield ◽  
Elizabeth J. Elsmo ◽  
Christopher A. Cleveland ◽  
Heather Fenton ◽  
...  
Keyword(s):  
United States ◽  
Eastern United States ◽  
Tyto Alba ◽  
Trichomonas Gallinae ◽  
Strix Varia ◽  
Barn Owls ◽  
Barred Owls

scholarly journals Offspring Desertion by Double-Brooded Female Barn Owls (Tyto Alba)

The Auk ◽  
2002 ◽  
Vol 119 (2) ◽  
pp. 515-519 ◽  
Author(s):  
Alexandre Roulin
Keyword(s):  
Breeding Success ◽  
Barn Owl ◽  
Nesting Success ◽  
Reproductive Cost ◽  
Tyto Alba ◽  
Barn Owls ◽  
Breeding Attempt ◽  
Second Clutch ◽  
Offspring Desertion

Abstract In double-brooded species, the sex that contributes less to breeding success may desert offspring before the end of the rearing period to start a new breeding attempt with another partner. I evaluated that prediction in the Barn Owl (Tyto alba), a species in which the male feeds the brood on average twice as often as the female. Among birds that produced a second brood, 46% of females and 4% of males deserted their offspring before completion of parental duties to remate with another partner at a distance of 1 to 10 km. Offspring desertion did not appear to incur a reproductive cost to the deserter, because deserting females at the first nest produced a similar number of offspring as nondeserting ones. In most cases, the new mate of deserting females had not been previously captured in the study area, and hence had probably not previously bred that season. Although the second clutch of deserting females was larger and produced two weeks earlier than that of nondeserting females, their nesting success did not differ.

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