1,720,963 research outputs found
Metodologia di studio e gestione delle popolazioni di fagiano di monte (Tetrao tetrix) in Provincia di Belluno.
No full textHabitat selection of the roe deer Capreolus capreolus (Artiodactyla: Cervidae) in an agroforestry system|Selezione dell’habitat del capriolo Capreolus capreolus (Artiodactyla: Cervidae) in un sistema agroforestale
No full textThe present study aimed at assessing the habitat preferences of the most widespread and abundant ungulate in Italy, the roe deer, in the Vallevecchia protected area (Venice). This area has been the object of naturalistic management and continuous environmental improvements in the last decades. Currently, the area is characterized by a high habitat heterogeneity, including deciduous woodlands, pine forests, wetlands, and farmlands. The study was carried out during the summers of 2017 and 2020. Data were collected along standardized transects, and the geo-localized records were divided into the corresponding habitats to calculate the Jacobs Index. In addition, chi-square test was applied, with the calculation of Pearson residuals to estimate the significance of associations to the habitats. The analyses show that in Vallevecchia the roe deer prefers woods and permanent meadows. Conversely, this ungulate avoids pine forests, wetlands and farmlands, despite their potential as sources of food and shelter. In line with other studies on agroforestry systems, wooded areas were most likely preferred because they provide shelter from disturbing factors and thermal stress, while meadows were likely chosen for trophic reasons. In this respect, we point out that in the studied area the preference for meadows was most likely due also to the availability of sprouts all year round, deriving from the constant mowing activities implemented in this habitat. In addition, our investigation underlines that the roe deer normally avoids maize and wheat crops, in accordance with similar studies. Moreover, the analyses highlight the preference for farmlands only if woods and grasslands are not present in the adjoining areas. Conversely, the proximity of these habitats results in a low impact on crops. In addition to encouraging the enforcement of current management actions in Vallevecchia, our results represent a contribution to a more effective management of the roe deer in agroforestry systems, aimed at limiting its impact in anthropized contexts and at achieving the conditions for a better coexistence of this deer with human activities
Risk factors and strategies for integrated management of bird pests affecting maize establishment
No full textBird damage to maize crops is an important cause of economic loss for maize growers in Italy. Consequently, the objectives of this study were to identify main species of birds attacking maize in north-eastern Italy and quantify the effects of agronomic characteristics, cultivation practices, landscape variables, and management practices on the incidence of bird damage to maize at establishment. A systematic survey of 5065 ha of maize cultivated land (Zea mays L.) at early plant stages was performed from 1986 to 2020, resulting in a dataset of 1619 records. Corvids (Corvus cornix) were found to be the main culprits of damage to maize fields. A multifactorial model was applied to assess the impact of potential risk factors. The presence of nearby roosting areas, such as hedgerows and woodlands with trees higher than 7 m, was associated with a five-fold increased risk of damage by birds. No-tillage soil management was associated with a higher risk of bird damage when compared with minimum tillage and conventional tillage systems. The probability of damage to a field with no risk factors was always low (<1%). The application of naturally derived bird repellents incorporated in seed coatings (i.e., ScudoSeed® and Eurodif®) decreased the risk of damage to maize by birds below the threshold value of 15%, yet they were slightly outperformed by their synthetic counterparts (i.e., Methiocarb and Ziram). Our results further suggest that it is possible to implement IPM principles for pest birds in maize
First data on environmental improvements concerning grey partridge, Perdix perdix (Linnaeus 1758), communities
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Distribuzione e dinamica della popolazione di camoscio alpino (Rupicapra rupicapra L., 1758) nella Foresta Demaniale di Giazza (Lessinia Orientale)
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