Sex Ratio of Rodents as Barn Owl (Tyto alba) Prey

Lyman, R. Lee; Daskalakis-Perez, Andes E.; Daskalakis-Perez, Eco A.

doi:10.1674/0003-0031-176.1.152

Cited by 3 publications

(2 citation statements)

References 37 publications

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“…There appears to be no preference by either owl species in the selection of small mammal prey by sex (Dickman et al 1991) in contrast to the findings of Lyman et al (2016) for T. alba preying on Microtus and Peromyscus. A surprisingly small number of studies have been conducted that address age and sex of prey taken by these raptors.…”

Section: Discussioncontrasting

confidence: 62%

Comparative Diet Analysis of Barn Owl (Tyto Alba) and Long- Eared Owl (Asio Otus) in a Habitat Island in North-Central Texas

Jiménez

Jones

Stoddart

et al. 2020

The Texas Journal of Science

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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 alba ) and the long-eared owl ( Asio otus ). The study was conducted at the Lewisville Lake Environmental Learning Area (LLELA), a patch of tallgrass prairie and post oak forest surrounded by areas with large anthropogenic modifications in north-central Texas. We examined the remains found in owl pellets collected September 2016 to March 2017. Small mammals, mainly rodents, constituted 100% of the T. alba and 98.5% of the A. otus diet. The hispid cotton rat ( Sigmodon hispidus ) was the most common prey detected (68.2% for T. alba and 89.0% for A. otus ). Diet niche breadth of T. alba was broader than that of A. otus (0.47 and 0.06, respectively), whereas mean prey size was smaller in the T. alba diet. Diet overlap between these owls was high (0.96), likely because they hunt similarly at night, on the wing, and the prey species have limited diversity. Most rodents eaten were juveniles and the sex ratio of prey was even in both owls’ diets. We highlight the value of conducting studies in such a unique and relatively pristine environment in the face of multiple threats. Additionally, although the occurrence of A. otus is rare and infrequent in the study area, we were still able to detect a difference in diet between the ubiquitous T. alba and A. otus.

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Section: Discussioncontrasting

confidence: 62%

Comparative Diet Analysis of Barn Owl (Tyto Alba) and Long- Eared Owl (Asio Otus) in a Habitat Island in North-Central Texas

Jiménez

Jones

Stoddart

et al. 2020

The Texas Journal of Science

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“…To study intraspecific selectivity, approaches from the standpoint of both ornithology and theriology are applied. An important component in this area of research is the determination of the size, sex, and age of animals from isolated parts of the skeletons (Trejo et al, 2005;Balčiauskas and Balčiauskienė, 2014;Lyman et al, 2016). Attempts were made to use the methods developed on modern animals and adapted to ornithogenic paleontological materials, to estimate the size and the age composition of prey from sediments, and to establish the reasons for selectivity (Kropacheva, 2016;Kropacheva et al, 2017).…”

Section: Ornithogenic Transformation Of Communities and Individualmentioning

confidence: 99%

Transition of Small Mammals from Live Elements of the Biocenoses to a Subfossil State

Kropacheva

Смирнов

2021

Biol Bull Russ Acad Sci

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A wide range of problems arising during paleoreconstructions of small mammal communities and individual animal characteristics is reviewed. The patterns of transformation and information loss at the stages of the transition of small mammals from live elements of biocenoses to a subfossil condition through the stage of prey of birds-myophages are discussed. A literature analysis shows the capacities and limitations of modern methods for reconstructing the sizes, ages, and diets of small mammals based on their molars. The digestive secretions of owls that affect the morphological and size parameters of the remains of the small mammals they consume are discussed. Particular attention is paid to the processes in which animal bone remains become part of the deposits and are transformed to subfossils. Transformations of the characteristics of small mammalian communities and the intraspecific structure of species as selective prey to raptors are shown. The importance of considering the differentiated loss of bone remains of different sizes that occurs during their digestion and dispersion in deposits is demonstrated.

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Age Distribution of Red Tree Voles in Northern Spotted Owl Pellets Estimated from Molar Tooth Development

2020

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Sex Ratio of Rodents as Barn Owl (Tyto alba) Prey

Cited by 3 publications

References 37 publications

Comparative Diet Analysis of Barn Owl (Tyto Alba) and Long- Eared Owl (Asio Otus) in a Habitat Island in North-Central Texas

Comparative Diet Analysis of Barn Owl (Tyto Alba) and Long- Eared Owl (Asio Otus) in a Habitat Island in North-Central Texas

Transition of Small Mammals from Live Elements of the Biocenoses to a Subfossil State

Age Distribution of Red Tree Voles in Northern Spotted Owl Pellets Estimated from Molar Tooth Development

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