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... Dioxin-like compounds (DLCs) elicit adverse effects through activation of the aryl hydrocarbon receptor (AHR). Prior investigations demonstrated that sensitivity to activation of AHR1 in an in vitro AHR transactivation assay is predictive of early life stage mortality among birds. The present study investigated the link between sensitivity to activation of AHR1s and AHR2s and early life stage mort ...
Falco peregrinus; birds; juveniles; Gulf of Mexico
Abstract:
... In October 2017, we opportunistically observed up to 50 Peregrine Falcons (Falco peregrinus) on a ship moored in the western Gulf of Mexico. All birds we aged were juveniles, and they hunted from the ship, frequently perching extremely close to one another (<1 m apart) on cables. Both the number of birds and also the very short inter-individual distances when perching make these observations unusu ...
Maureen D. Correll; Whitney A. Wiest; Thomas P. Hodgman; Joseph T. Kelley; Brian J. Mcgill; Chris S. Elphick; W. Gregory Shriver; Meaghan Conway; Christopher R. Field; Brian J. Olsen
biomass; birds; community structure; competitive exclusion; ecosystems; evolution; functional diversity; habitat destruction; habitats; humans; hurricanes; ice; infrastructure; latitude; paleoecology; paleozoology; salt marshes; species diversity; surveys; Northeastern United States
Abstract:
... There is growing evidence to support that paleo‐timescale events are important determinants in the present‐day distribution of organisms. We explored the relationship between community composition of tidal marsh birds in the northeastern United States and potential drivers of biodiversity patterns across timescales to explore the relevance of historical contingency in this ecosystem. These potenti ...
aquatic invertebrates; biocenosis; birds; environmental impact; fish; lakes; mammals; roadside plants; runoff; snow; soil structure; water salinization; North America
Abstract:
... Road-salt runoff is an increasing problem in areas of North America that receive snow. Its effects include groundwater salinization, loss or reduction in lake turnover, and changes in soil structure. Road-salt runoff can affect biotic communities by causing changes in the composition of fish or aquatic invertebrate assemblages. It also poses threats to birds, mammals, and roadside vegetation. ...
... Chlamydiae have a worldwide distribution causing a wide range of diseases in human hosts, livestock, and companion animals as well as in wildlife and exotic species. Moreover, they can persist in their hosts as asymptomatic infections for extended periods of time. The introduction of molecular techniques has revolutionized the Chlamydia field by expanding the host range of known chlamydial species ...
... Honey bees are used in intensive way in agriculture due to their vital role in pollination of crops. Moreover, there are many valuable products from the bee colonies. Unfortunately, there are many enemies to honey bees. These enemies belong to various taxonomic ranks, including birds, insects and mites. Serious damages can be caused to honey bee colonies by these enemies. The sophisticated evoluti ...
Common Agricultural Policy; agri-environmental policy; agricultural land; biodiversity conservation; birds; economic incentives; landscapes; livestock production; markets; models; production technology; rain; steppes; traditional farming
Abstract:
... High Nature Value (HNV) farmland is declining in the EU, with negative consequences for biodiversity conservation. Agri-environment schemes implemented under the Common Agricultural Policy have addressed this problem, with recent proposals advocating direct support to HNV farming systems. However, research is lacking on the economics of HNV farming, which makes it difficult to set the level and ty ...
anthropogenic activities; arid zones; avifauna; birds; drying; ecosystems; population size; steppes; surface water; wetlands; Russia
Abstract:
... We have developed a technique to assess the state of shore ornithocomplexes that can be used for any artificial water bodies to reveal disturbances in their functioning and use. The article presents data on some artificial reservoirs of the dry-steppe zone in the south of the European part of Russia (Republic of Kalmykia). Our research has revealed the main factors of the environmental influence ( ...
... The anticoagulant rodenticides brodifacoum, chlorophacinone, and diphacinone have been proposed for broadcast application in some forested areas in Hawai'i to protect rare and endangered native bird species from introduced mice and rats. Groundwater resources in Hawai'i are prone to contamination due to the intrinsic aquifer vulnerability to leaching from the land surface. Because of the hydrogeol ...
... As part of an ongoing camera trapping project in the Sabangau Peat-swamp Forest (Central Kalimantan, Indonesia), we present camera-trap data on the avifauna. The camera traps have captured images and videos since 2008, including 224 individual bird photos representing 142 unique events of 25 species, 11 of which are Endangered, Vulnerable, or Near-Threatened, all of which we describe in species ac ...
Dermanyssus gallinae; birds; blood; case studies; dermatitis; females; histology; humans; kittens; mite infestations; mites; nests; poultry industry; rural areas; scanning electron microscopy; skin lesions; small mammals; urban areas; veterinary medicine
Abstract:
... BACKGROUND: Dermanyssus gallinae is a major threat for the poultry industry; these mites also feed on the blood of many other birds, small mammals and potentially humans. HYPOTHESIS/OBJECTIVES: Three cats with dermatitis attributed to D. gallinae infestation. ANIMALS: Two 40‐day‐old kittens, living in a rural area, and one 7‐year‐old female indoor cat, were presented with a pruritic skin condition ...
agricultural zoning; birds; climate; climate change; habitat preferences; land use change; models; probability; species richness; surveys; temperature; urbanization; California
Abstract:
... Climate and land‐use changes are thought to be the greatest threats to biodiversity, but few studies have directly measured their simultaneous impacts on species distributions. We used a unique historic resource—early 20th‐century bird surveys conducted by Joseph Grinnell and colleagues—paired with contemporary resurveys a century later to examine changes in bird distributions in California's Cent ...
... BACKGROUND: Current knowledge of urban bird ecology and biodiversity relies on evidence from cities of the Northern Hemisphere, while the Southern Hemisphere is underrepresented. Santiago is a large city from South America, located in central Chile, which is both a biodiversity hotspot and an Endemic Bird Area. This work is a synthesis, which aims to provide a diversity account for Santiago, and t ...
Darren E. Irwin; Borja Milá; David P. L. Toews; Alan Brelsford; Haley L. Kenyon; Alison N. Porter; Christine Grossen; Kira E. Delmore; Miguel Alcaide; Jessica H. Irwin
... Detailed evaluations of genomic variation between sister species often reveal distinct chromosomal regions of high relative differentiation (i.e., “islands of differentiation” in FST), but there is much debate regarding the causes of this pattern. We briefly review the prominent models of genomic islands of differentiation and compare patterns of genomic differentiation in three closely related pa ...
... Individual specificity can be found in the vocalizations of many avian and mammalian species. However, it is often difficult to determine whether these vocal cues to identity rise from “unselected” individual differences in vocal morphology or whether they have been accentuated by selection for the purposes of advertising caller identity. By comparing the level of acoustic individuality of differe ...
Cyanistes caeruleus; allometry; birds; breeding sites; calcium; clutch size; eggs; forests; habitats; life history; phylogeny; progeny; urban parks
Abstract:
... BACKGROUND: Interspecies variation in avian egg shape and size is understandable in terms of adaptation, allometry and phylogeny. Within-species variation in egg properties influences offspring fitness and can be explained by differences in allocation of resources into reproductive components of life history in mulidimensionally variable environments. Egg size is inherently traded-off with clutch ...
... The Antarctic petrel (Thalassoica antarctica) has been identified as a key species for monitoring the status and health of the Southern Ocean and Antarctic ecosystems. Breeding colonies of the Antarctic petrel are often found on isolated nunataks far from inhabited stations, some up to hundreds of kilometers from the shoreline. It is difficult therefore to monitor and census known colonies, and it ...
Passeriformes; birds; case studies; cost effectiveness; monitoring; protocols; wildlife
Abstract:
... Capsule: We describe an effective monitoring protocol for detecting wildlife presence using autonomous recording units (ARUs) under different density scenarios. Aims: To describe an effective protocol for monitoring a night-time singing passerine, the Dupont’s Lark Chersophilus duponti, using ARUs. Methods: We estimate, using both simulations and field-collected data, the number of devices needed ...
birds; indigenous species; museums; species identification; Caribbean; Slovakia
Abstract:
... A collection of exotic birds deposited in the Šariš Museum in Bardejov (SMB), Slovakia, has not been evaluated critically since their deposition. We assessed the accuracy of identification of 465 bird specimens deposited in SMB with native distributions outside of Slovakia. Specimens belonged to 322 species of 82 families and 26 orders. Of the specimen represented, 34 belonged to species considere ...
... The β-defensin, one of the antimicrobial peptides (AMPs), is a significant component of the innate immune with a broad range of antimicrobial activities. Differing from the widely-studied mammals and birds, limited information about β-defensins has been reported in reptiles, especially in crocodilians. As a same ancient species as dinosaurs and the most endangered species of 23 crocodilians, the s ...