The Experts below are selected from a list of 99 Experts worldwide ranked by ideXlab platform
Dave Goulson - One of the best experts on this subject based on the ideXlab platform.
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first evidence of neonicotinoid residues in a long distance migratory raptor the European Honey Buzzard pernis apivorus
Science of The Total Environment, 2018Co-Authors: Patrik Byholm, Sanna Makelainen, Andrea Santangeli, Dave GoulsonAbstract:Abstract The evidence of negative impacts of agricultural pesticides on non-target organisms is constantly growing. One of the most widely used group of pesticides are neonicotinoids, used in treatments of various plants, e.g. oilseed crops, corn and apples, to prevent crop damage by agricultural insect pests. Treatment effects have been found to spill over to non-target insects, such as bees, and more recently also to other animal groups, among them passerine birds. Very little is known, however, on the presence of neonicotinoids in other wild species at higher trophic levels. We present results on the presence of neonicotinoid residues in blood samples of a long-distant migratory food-specialist raptor, the European Honey Buzzard. Further, we investigate the spatial relationship between neonicotinoid residue prevalence in Honey Buzzards with that of crop fields where neonicotinoids are typically used. A majority of all blood samples contained neonicotinoids, thiacloprid accounting for most of the prevalence. While neonicotinoid residues were detected in both adults and nestlings, the methodological limit of quantification was exceeded only in nestlings. Neonicotinoids were present in all sampled nests. Neonicotinoid presence in Honey Buzzard nestlings' blood matched spatially with the presence of oilseed plant fields. These are the first observations of neonicotinoids in a diurnal raptor. For better understanding the potential negative sub-lethal of neonicotinoids in wild vertebrates, new (experimental) studies are needed.
Patrik Byholm - One of the best experts on this subject based on the ideXlab platform.
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forest availability and fragmentation drive movement behaviour of wintering European Honey Buzzard pernis apivorus in africa
Ardea, 2020Co-Authors: Caroline Howes, Patrik Byholm, Craig T SymesAbstract:Decreases in suitable habitat due to loss and fragmentation on the African non-breeding grounds are believed to be a driver of the declines in Palaearctic migrants. However, the effects of habitat loss and fragmentation on individual migrants have rarely been investigated. The European Honey-Buzzard Pernis apivorus, a migratory forest specialist, displays the characteristics of a species that would be sensitive to declines in suitable habitat. We assessed site fidelity, habitat selection and home range characteristics of 32 tracked European Honey-Buzzards in Africa to understand how habitat transformation on the non-breeding grounds affects the movement behaviour (particularly habitat use and home range characteristics) of the species. Adults had greater site fidelity than juveniles, indicating that young birds were exploring to locate suitable habitat for future non-breeding territories. Besides site fidelity, there were few significant differences between the movements of adult and juvenile Honey-Buzzards. Birds of all age classes strongly selected treed habitat, as expected. Treed largest patch index and edge density had a negative effect on home range size, demonstrating that Honey-Buzzards rely on large tracts of continuous forest, but can tolerate some level of fragmentation. Individuals with larger home ranges due to greater levels of forest fragmentation moved greater daily distances. In addition, Honey-Buzzards spent more time in home ranges with larger treed largest patch indices and lower edge density. This reveals that birds that do not have access to a large patch of unfragmented forest are both flying greater distances on a daily basis and moving to new home ranges more often. This likely results in greater energy expenditure over their non-breeding period, which may have adverse effects on their long-term survival. Furthermore, our analyses support the hypothesis that continuing forest loss in Africa will have a negative effect on the European Honey-Buzzard population.
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highly skewed sex and age ratios of European Honey Buzzard in southern africa
Journal of Ornithology, 2020Co-Authors: Caroline Howes, Craig T Symes, Patrik ByholmAbstract:Sex and age segregation on the non-breeding grounds is common in raptor species. We studied the European Honey Buzzard (Pernis apivorus) on its southern African non-breeding grounds to examine changes in sex and age ratios over a period of recent population expansion (2002–2017). Photographs from multiple open sources were analysed. The adult population was found to be overwhelmingly female (93.3%) with no significant variation over months, years, or latitudes. This supports the arrival-time hypothesis, which states that the sex responsible for establishing the breeding territory (the male in Honey Buzzard) will spend the non-breeding period closest to the breeding grounds, allowing them to reduce intrasexual competition for breeding territories. Juvenile and second year birds (41.6% of the population) were more common at lower elevations, as well as further south in the sub-region. This is likely due to a funnelling effect of inexperienced juvenile birds further south and to coastal zones. In addition, juvenile birds do not return to the breeding grounds for at least 2 years, so may be more likely to migrate further south. Finally, second year birds increase later in the austral summer. This may be a result of both juvenile birds moulting into more adult plumage, and a southward intra-continental movement of young Honey Buzzards in Africa.
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first evidence of neonicotinoid residues in a long distance migratory raptor the European Honey Buzzard pernis apivorus
Science of The Total Environment, 2018Co-Authors: Patrik Byholm, Sanna Makelainen, Andrea Santangeli, Dave GoulsonAbstract:Abstract The evidence of negative impacts of agricultural pesticides on non-target organisms is constantly growing. One of the most widely used group of pesticides are neonicotinoids, used in treatments of various plants, e.g. oilseed crops, corn and apples, to prevent crop damage by agricultural insect pests. Treatment effects have been found to spill over to non-target insects, such as bees, and more recently also to other animal groups, among them passerine birds. Very little is known, however, on the presence of neonicotinoids in other wild species at higher trophic levels. We present results on the presence of neonicotinoid residues in blood samples of a long-distant migratory food-specialist raptor, the European Honey Buzzard. Further, we investigate the spatial relationship between neonicotinoid residue prevalence in Honey Buzzards with that of crop fields where neonicotinoids are typically used. A majority of all blood samples contained neonicotinoids, thiacloprid accounting for most of the prevalence. While neonicotinoid residues were detected in both adults and nestlings, the methodological limit of quantification was exceeded only in nestlings. Neonicotinoids were present in all sampled nests. Neonicotinoid presence in Honey Buzzard nestlings' blood matched spatially with the presence of oilseed plant fields. These are the first observations of neonicotinoids in a diurnal raptor. For better understanding the potential negative sub-lethal of neonicotinoids in wild vertebrates, new (experimental) studies are needed.
Byholm Patrik - One of the best experts on this subject based on the ideXlab platform.
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Data from: Evidence of large-scale range shift in the distribution of a Palaearctic migrant in Africa
2019Co-Authors: Howes Caroline, Symes, Craig T., Byholm PatrikAbstract:Aim: Long-distance Palaearctic migrant birds are declining at a faster rate than short-distance migrant or resident species. This is often attributed to changes on their non-breeding grounds and along their migratory routes. The European Honey-Buzzard (Pernis apivorus) is a scarce migrant in southern Africa that is declining globally. This study assessed the distribution and abundance of Honey-Buzzards in southern Africa over the past four decades and compared it to trends in the East African population to examine possible drivers of population expansion in southern Africa. Location Southern and East Africa Methods European Honey-Buzzard reporting data were collected from a variety of sources including citizen science databases (1983-2017). In addition, records of all other southern African vagrants (including ten other regularly occurring species) were gathered to account for changes in birdwatching effort in the sub-region. To assess the effect of forest loss on Honey-Buzzard abundance, rolling correlations were performed using forest cover in East Africa and number of Honey-Buzzard records in both sub-regions. Results European Honey-Buzzard records in southern Africa have increased over five times more than other regularly occurring vagrant species and almost 40 times more than Honey-Buzzard in Tanzania, where the population has remained stable. Loss of forested area in East Africa was correlated with an increase in European Honey-Buzzard records in southern Africa. Main conclusions We suggest that the European Honey-Buzzard shift in wintering range may be driven by a decline in suitable habitat further north in Africa amongst other possible reasons. This effect may have been amplified by an increase in appropriate habitat across southern Africa brought about by anthropogenic changes to vegetation such as increased tree cover in urban areas. This study further highlights the importance of using African distributional data banks to understand the effects of global change on Palaearctic migrant bird species
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Data from: Evidence of large-scale range shift in the distribution of a Palaearctic migrant in Africa
2019Co-Authors: Howes Caroline, Symes Craig, Byholm PatrikAbstract:This data folder contains two data sheets, i) European Honey-Buzzard records from southern Africa and ii) rarity records from southern Africa
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First evidence of neonicotinoid residues in a long-distance migratory raptor, the European Honey Buzzard (Pernis apivorus)
'Elsevier BV', 2018Co-Authors: Byholm Patrik, Mäkeläinen Sanna, Santangeli Andrea, Goulson DaveAbstract:The evidence of negative impacts of agricultural pesticides on non-target organisms is constantly growing. One of the most widely used group of pesticides are neonicotinoids, used in treatments of various plants, e.g. oilseed crops, corn and apples, to prevent crop damage by agricultural insect pests. Treatment effects have been found to spill over to non-target insects, such as bees, and more recently also to other animal groups, among them passerine birds. Very little is known, however, on the presence of neonicotinoids in other wild species at higher trophic levels. We present results on the presence of neonicotinoid residues in blood samples of a long-distant migratory food-specialist raptor, the European Honey Buzzard. Further, we investigate the spatial relationship between neonicotinoid residue prevalence in Honey Buzzards with that of crop fields where neonicotinoids are typically used. A majority of all blood samples contained neonicotinoids, thiacloprid accounting for most of the prevalence. While neonicotinoid residues were detected in both adults and nestlings, the methodological limit of quantification was exceeded only in nestlings. Neonicotinoids were present in all sampled nests. Neonicotinoid presence in Honey Buzzard nestlings' blood matched spatially with the presence of oilseed plant fields. These are the first observations of neonicotinoids in a diurnal raptor. For better understanding the potential negative sublethal of neonicotinoids in wild vertebrates, new (experimental) studies are needed. (c) 2018 The Authors. Published by Elsevier B.V.Peer reviewe
Roger Vila - One of the best experts on this subject based on the ideXlab platform.
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exploitation of the invasive asian hornet vespa velutina by the European Honey Buzzard pernis apivorus
Bird Study, 2019Co-Authors: F X Macia, Mattia Menchetti, Cecilia Corbella, J Grajera, Roger VilaAbstract:This paper reports the first case of predation on the nests of Asian Hornet Vespa velutina by the European Honey Buzzard Pernis apivorus, as well as the use of this resource by a breeding pair to p...
Sanna Makelainen - One of the best experts on this subject based on the ideXlab platform.
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first evidence of neonicotinoid residues in a long distance migratory raptor the European Honey Buzzard pernis apivorus
Science of The Total Environment, 2018Co-Authors: Patrik Byholm, Sanna Makelainen, Andrea Santangeli, Dave GoulsonAbstract:Abstract The evidence of negative impacts of agricultural pesticides on non-target organisms is constantly growing. One of the most widely used group of pesticides are neonicotinoids, used in treatments of various plants, e.g. oilseed crops, corn and apples, to prevent crop damage by agricultural insect pests. Treatment effects have been found to spill over to non-target insects, such as bees, and more recently also to other animal groups, among them passerine birds. Very little is known, however, on the presence of neonicotinoids in other wild species at higher trophic levels. We present results on the presence of neonicotinoid residues in blood samples of a long-distant migratory food-specialist raptor, the European Honey Buzzard. Further, we investigate the spatial relationship between neonicotinoid residue prevalence in Honey Buzzards with that of crop fields where neonicotinoids are typically used. A majority of all blood samples contained neonicotinoids, thiacloprid accounting for most of the prevalence. While neonicotinoid residues were detected in both adults and nestlings, the methodological limit of quantification was exceeded only in nestlings. Neonicotinoids were present in all sampled nests. Neonicotinoid presence in Honey Buzzard nestlings' blood matched spatially with the presence of oilseed plant fields. These are the first observations of neonicotinoids in a diurnal raptor. For better understanding the potential negative sub-lethal of neonicotinoids in wild vertebrates, new (experimental) studies are needed.
