Post by account_disabled on Oct 26, 2023 4:11:49 GMT -5
The dietary pattern of a species is the result of the interaction between ecological and/or evolutionary mechanisms that determined the structure of its dietary niche. When a species has a habitat overlap with ours, it is very important to understand the influence of anthropogenic factors on the dynamics of these populations. The Strigiformes order is mainly represented by owls and is widely distributed in nature and near cities.
The objective of this work was to characterize the diet pattern of Athene cunicularia , through the analysis of population parameters and environmental variables in a population occurring in an anthropized area, on the outskirts of the city of Goiânia-GO. Dietary items were evaluated in regurgitated pellets (egagrópila) of burrowing owls over a period of eleven months. The heterogeneity of items and the seasonal europe mobile number list variation in the amount of egagropylae were recorded. Other variables were also collected, such as items per nest, distance from public places and public lighting posts, population size, density per nest, length and height of each nest. After screening, 190 egagropiles were analyzed, collected from 23 nests. In general, different categories of food items were observed, such as vertebrates (predominantly rodents and marsupials) and invertebrates (coleopterans, orthopterans and others, probably hymenopterans and isopterans).
The relationships between anthropic factors and the distributions of food items did not show a statistically significant correlation for the samples analyzed. However, the predominance of invertebrates (mainly insects) in the diet of this species may indicate that, in urban areas, this is not just a food preference. It may indicate the effect of greater availability of these resources. Therefore, it is important to understand the feeding dynamics of these birds, both in urban and rural environments, in order to establish conservation measures and also to map the distribution of synanthropic fauna preyed upon by them. These data can help in establishing, for example, biological control measures for invertebrates, contributing to future public policies for the municipality. Keywords: food niche, Athene cunicularia, egagrópila, anthropogenic influence.
The objective of this work was to characterize the diet pattern of Athene cunicularia , through the analysis of population parameters and environmental variables in a population occurring in an anthropized area, on the outskirts of the city of Goiânia-GO. Dietary items were evaluated in regurgitated pellets (egagrópila) of burrowing owls over a period of eleven months. The heterogeneity of items and the seasonal europe mobile number list variation in the amount of egagropylae were recorded. Other variables were also collected, such as items per nest, distance from public places and public lighting posts, population size, density per nest, length and height of each nest. After screening, 190 egagropiles were analyzed, collected from 23 nests. In general, different categories of food items were observed, such as vertebrates (predominantly rodents and marsupials) and invertebrates (coleopterans, orthopterans and others, probably hymenopterans and isopterans).
The relationships between anthropic factors and the distributions of food items did not show a statistically significant correlation for the samples analyzed. However, the predominance of invertebrates (mainly insects) in the diet of this species may indicate that, in urban areas, this is not just a food preference. It may indicate the effect of greater availability of these resources. Therefore, it is important to understand the feeding dynamics of these birds, both in urban and rural environments, in order to establish conservation measures and also to map the distribution of synanthropic fauna preyed upon by them. These data can help in establishing, for example, biological control measures for invertebrates, contributing to future public policies for the municipality. Keywords: food niche, Athene cunicularia, egagrópila, anthropogenic influence.