Blar i NTNU Open på forfatter "Stokke, Bård Gunnar"
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Disappearance of eggs from non-parasitized nests of brood parasite hosts – the evolutionary equilibrium hypothesis revisited
Stokke, Bård Gunnar; Røskaft, Eivin; Moksnes, Arne; Møller, Anders Pape; Antonov, Anton Tinchov; Fossøy, Frode; Liang, Wei; Lopez-Iborra, German; Moskát, Csaba; Shykoff, Jacqui A.; Soler, Manuel; Vikan, Johan Reinert; Yang, Canchao; Takasu, Fugo (Journal article; Peer reviewed, 2016)The evolutionary equilibrium hypothesis was proposed to explain variation in egg rejection rates among individual hosts (intra- and interspecific) of avian brood parasites. Hosts may sometimes mistakenly reject own eggs ... -
Diversity of parasitic cuckoos and their hosts in China
Yang, Canchao; Liang, Wei; Antonov, Anton Tinchov; Cai, Yan; Stokke, Bård Gunnar; Fossøy, Frode; Moksnes, Arne; Røskaft, Eivin (Journal article, 2012)In this exposé we provide the first review of host use by brood parasitic cuckoos in a multiple-cuckoo system in China, based on our own long-term field data and a compilation of observations obtained from the literature. ... -
Effects of arthropod abundance on reproductive success in Svalbard snow bunting (Plectrophenax nivalis)
Gravelsæther, Maria Angelil (Master thesis, 2021)Arktisk oppvarming fører til store miljøforandringer og biologiske forandringer, samt påvirker trofiske interaksjoner. Effekter av klimaforandringer har allerede blitt observert hos flere arktis-hekkende trekkfugler, med ... -
Egg arrangement in avian clutches covaries with the rejection of foreign eggs
Polacikova, Lenka; Takasu, Fugo; Stokke, Bård Gunnar; Moksnes, Arne; Røskaft, Eivin; Cassey, Phillip; Hauber, Mark; Grim, Tomas (Journal article, 2013)In birds, the colour, maculation, shape, and size of their eggs play critical roles in discrimination of foreign eggs in the clutch. So far, however, no study has examined the role of egg arrangement within a clutch on ... -
Egg phenotype matching by cuckoos in relation to discrimination by hosts and climatic conditions
Avilés, Jesús M.; Vikan, Johan Reinert; Fossøy, Frode; Antonov, Anton Tinchov; Moksnes, Arne; Røskaft, Eivin; Shykoff, Jacqui A.; Møller, Anders pape; Stokke, Bård Gunnar (Journal article, 2012)Although parasites and their hosts often coexist in a set of environmentally differentiated populations connected by gene flow, few empirical studies have considered a role of environmental variation in shaping correlations ... -
Environmental correlates of variation in a holistic analysis of annual offspring production in the high Arctic songbird snow bunting (Plectrophenax nivalis) on Spitsbergen
Egil Lillehaug (Master thesis, 2019)Klima og vær er viktige abiotiske faktorer som påvirker organismer, spesielt i områder med store værforskjeller, som Arktis. Hvordan været påvirker reproduksjonssuksessen til en fugl som hekker der er spesielt interessant ... -
First record of Common Tailorbird (Orthotomus sutorius) parasitism by Plaintive Cuckoo (Cacomantis merulinus) in Bangladesh
Nahid, Mominul Islam; Fossøy, Frode; Begum, Sajeda; Røskaft, Eivin; Stokke, Bård Gunnar (Peer reviewed; Journal article, 2016)The Plaintive Cuckoo (Cacomantis merulinus) is a widespread brood parasite in Asia, but no data on host species utilization in Bangladesh exist. By searching for nests of all possible host species of the Plaintive Cuckoo ... -
First-time Migration in Juvenile Common Cuckoos Documented by Satellite Tracking
Vega, Marta Lomas; Willemoes, Mikkel; Thomson, Robert L.; Tolvanen, Jere; Rutila, Jarkko; Samas, Peter; Strandberg, Roine; Grim, Tomas; Fossøy, Frode; Stokke, Bård Gunnar; Thorup, Kasper (Journal article; Peer reviewed, 2016)Being an obligate parasite, juvenile common cuckoos Cuculus canorus are thought to reach their African wintering grounds from Palearctic breeding grounds without guidance from experienced conspecifics but this has not been ... -
From Svalbard to Siberia: Passerines breeding in the High Arctic also endure the Extreme cold of the Western Steppe
Snell, Katherine R. S.; Stokke, Bård Gunnar; Moksnes, Arne; Thorup, Kasper; Fossøy, Frode (Journal article; Peer reviewed, 2018)Few species are adapted to high latitudes, and many over-winter in milder climates with migrations involving extensive barrier crossings. By escaping extreme conditions for the majority of the year, physiological and ... -
Geographic variation in egg ejection rate by great tits across 2 continents
Liang, Wei; Møller, Anders Pape; Stokke, Bård Gunnar; Yang, Canchao; Kovařík, Petr; Wang, Haitao; Yao, Cheng-Te; Ding, Ping; Lu, Xin; Moksnes, Arne; Røskaft, Eivin; Grim, Tomas (Journal article; Peer reviewed, 2016)Hosts of brood parasites may vary geographically in their ability to resist parasitism. In contrast, geographic variation in defenses, such as egg rejection, is not expected to be present or vary geographically in unsuitable ... -
Global life-cycle impacts of onshore wind-power plants on bird richness
May, Roelof Frans; Middel, Heleen; Stokke, Bård Gunnar; Jackson, Craig Ryan; Verones, Francesca (Peer reviewed; Journal article, 2020)Wind energy development continues to expand rapidly to meet international climate targets. However, these developments impact biodiversity and associated sustainability targets negatively. Environmental impact assessments ... -
Hawk models, hawk mimics, and antipredator behavior of prey
Møller, Anders pape; Stokke, Bård Gunnar; Samia, Diogo SM (Journal article; Peer reviewed, 2015)Prey typically respond to potential predators by taking flight. This results in an optimal flight initiation distance (FID) at which the risk of remaining and the cost of flight are equal. Thus, FID is strongly negatively ... -
Host selection in parasitic birds: are open-cup nesting insectivorous passerines always suitable cuckoo hosts?
Yang, Canchao; Stokke, Bård Gunnar; Antonov, Anton Tinchov; Cai, Yan; Shi, Suhua; Moksnes, Arne; Røskaft, Eivin; Møller, Anders pape; Liang, Wei; Grim, Tomas (Journal article; Peer reviewed, 2013)How do potential hosts escape detrimental interactions with brood parasites? Current consensus is that hole-nesting and granivorous birds avoid brood parasites, like common cuckoos Cuculus canorus , by their inaccessible ... -
How does human disturbance affect brood parasitism and nest predation in hosts inhabiting a highly fragmented landscape?
Nahid, Mominul Islam; Fossøy, Frode; Stokke, Bård Gunnar; Begum, Sajeda; Røskaft, Eivin; Ranke, Peter Sjolte (Peer reviewed; Journal article, 2020)Human disturbance represents a considerable challenge for the conservation of living organisms and has profound negative impacts globally. There is substantial variation in how species respond to human disturbance. The ... -
Increase of clutch size triggers clutch destruction behaviour in common moorhens (Gallinula chloropus) during the incubation period
Wang, Longwu; Yang, Canchao; Hsu, Yu-Cheng; Antonov, Anton Tinchov; Moksnes, Arne; Røskaft, Eivin; Liang, Wei; Stokke, Bård Gunnar (Journal article; Peer reviewed, 2013)Conspecific brood parasitism (CBP) is common in a variety of animal taxa, including birds. In coots (Fulica spp.), and the closely related moorhens (Gallinula spp.), such parasitism is especially common, and hosts experience ... -
Interspecific competition impacts the occupancy and range limits of two ptarmigan species along the elevation gradient in Norway
Mandeville, Caitlin Marie; Finstad, Anders Gravbrøt; Kålås, John Atle; Stokke, Bård Gunnar; Øien, Ingar Jostein; Nilsen, Erlend Birkeland (Peer reviewed; Journal article, 2024)Many mountain species are expected to respond to climate change through upslope shifts of their range limits, but competition may restrict or alter this response. Under traditional range-limit theory, it is expected that ... -
Large hawk-cuckoo Hierococcyx sparveroides parasitism on the Chinese babax Babax lanceolatus may be an evolutionary recent host-parasite system
Yang, Canchao; Antonov, Anton Tinchov; Cai, Yan; Stokke, Bård Gunnar; Moksnes, Arne; Røskaft, Eivin; Liang, Wei (Journal article; Peer reviewed, 2012)We documented brood parasitism by the poorly studied Large Hawk-Cuckoo on a previously unknown host species, the Chinese Babax. Furthermore, we describe a new egg colour for the Large Hawk-Cuckoo. The parasitism rate of ... -
Life-cycle impacts of wind energy development on bird diversity in Norway
May, Roelof Frans; Jackson, Craig Ryan; Middel, Heleen; Stokke, Bård Gunnar; Verones, Francesca (Peer reviewed; Journal article, 2021)While wind energy remains a preferred source of renewable energy, understanding the full spectrum of impacts are vital to balance climate-related benefits against their costs to biodiversity. Environmental impact assessments ... -
Life-history Effects of Metal contamination in Arctic snow buntings (Plectrophenax nivalis) breeding in Adventdalen, Svalbard.
Nordnes, Linda Dalen (Master thesis, 2016)The present study was the first to investigate element concentrations in feathers of both nestling and adult snow buntings in the Arctic environment of Adventdalen. Significant differences in concentrations between nestling- ... -
Modelling the maintenance of egg polymorphism in avian brood parasites and their hosts
Liang, Wei; Yang, Canchao; Stokke, Bård Gunnar; Antonov, Anton Tinchov; Fossøy, Frode; Vikan, Johan Reinert; Moksnes, Arne; Røskaft, Eivin; Shykoff, Jacqui A.; Møller, Anders Pape; Takasu, Fugo (Journal article, 2012)In avian brood parasitism, egg phenotype plays a key role for both host and parasite reproduction. Several parrotbill species of the genus Paradoxornis are parasitized by the common cuckoo Cuculus canorus, and clear ...