Browsing NTNU Open by Author "Stokke, Bård Gunnar"
Now showing items 41-59 of 59
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No evidence of host-specific egg mimicry in Asian koels
Nahid, Mominul Islam; Fossøy, Frode; Stokke, Bård Gunnar; Abernathy, Virginia; Begum, Sajeda; Langmore, Naomi E.; Røskaft, Eivin; Ranke, Peter Sjolte (Peer reviewed; Journal article, 2021)Avian brood parasitism is costly for the host, in many cases leading to the evolution of defenses like discrimination of parasitic eggs. The parasite, in turn, may evolve mimetic eggs as a counter-adaptation to host egg ... -
Oriental reed warbler (Acrocephalus orientalis) nest defence behaviour towards brood parasites and nest predators
Li, Donglai; Wei, Hongwei; Zhang, Zhengwang; Liang, Wei; Stokke, Bård Gunnar (Journal article; Peer reviewed, 2015)Brood parasites and predators pose different threats to passerines that may favour the evolution of enemy-specific defence strategies. Furthermore, potential sex-specific variation in parental investment may be manifested ... -
Outcomes of brood parasite-host interactions mediated by egg matching: Common cuckoos Cuculus canorus versus Fringilla finches
Vikan, Johan Reinert; Fossøy, Frode; Huhta, Esa; Moksnes, Arne; Røskaft, Eivin; Stokke, Bård Gunnar (Journal article; Peer reviewed, 2011)Background: Antagonistic species often interact via matching of phenotypes, and interactions between brood parasitic common cuckoos (Cuculus canorus) and their hosts constitute classic examples. The outcome of a parasitic ... -
Plaintive Cuckoo Nestling Adaptations and Development in Common Tailorbird Nests - Costly Child Custody
Tunheim, Odd Helge (Master thesis, 2015)Avian brood parasitism represents a suitable system for studying coevolution, as parasite and host engage in an escalating arms race. The parasite develops adaptations to overcome host defences, and in addition develops ... -
Plaintive cuckoos do not select tailorbird hosts that match the phenotypes of their own eggs
Yang, Canchao; Huang, Qiuli; Wang, Longwu; Jiang, Aiwu; Stokke, Bård Gunnar; Fossøy, Frode; Tunheim, Odd Helge; Røskaft, Eivin; Liang, Wei; Møller, Anders Pape (Journal article; Peer reviewed, 2016)Laying a mimetic egg is important for a brood parasite to succeed in defeating the defenses of a host that can recognize and reject nonmimetic foreign eggs. Several recent studies suggest that common cuckoos ( Cuculus ... -
Possible Anthropogenic Sources of Toxic Elements in Snow Bunting Nestlings (Plectrophenax nivalis) in Adventdalen, Svalbard.
Sørhus, Hanna Sofie (Master thesis, 2017)The Arctic environment is exposed to natural and anthropogenic contamination as a result of local, regional and global pollution. Contaminants accumulating in the Arctic may influence both biotic and abiotic factors. ... -
Pre- and post-construction studies of conflicts between birds and wind turbines in coastal Norway (BirdWind). Report on findings 2007-2010
Bevanger, Kjetil Modolv; Berntsen, Finn Erik Harald; Clausen, Stig Morten; Dahl, Espen Lie; Flagstad, Øystein; Follestad, Arne; Halley, Duncan John; Hanssen, Frank Ole; Johnsen, Lars; Kvaløy, Pål; Lund-Hoel, Pernille*; May, Roelof Frans; Nygård, Torgeir; Pedersen, Hans-Christian; Reitan, Ole; Røskaft, Eivin; Steinheim, Yngve; Stokke, Bård Gunnar; Vang, Roald (NINA rapport;620, Research report, 2011)The BirdWind project (2007-2010) is now concluded. This report summarises the main findings. Several scientific papers are in the process of preparation for publication in international peer re-view journals; this report ... -
Predator–prey interactions in the Arctic: DNA metabarcoding reveals that nestling diet of snow buntings reflects arthropod seasonality
Stolz, Christian; Varpe, Øystein; Ims, Rolf Anker; Sandercock, Brett Kevin; Stokke, Bård Gunnar; Fossøy, Frode (Peer reviewed; Journal article, 2023)Tundra arthropods are of considerable ecological importance as a seasonal food source for many arctic-breeding birds. Dietary composition and food preferences are rarely known, complicating assessments of ecological ... -
Rapid development of brood-parasitic cuckoo embryos cannot be explained by increased gas exchange through the eggshell
Portugal, Steven J.; Hauber, Mark E.; Maurer, Golo; Stokke, Bård Gunnar; Grim, Tomas; Cassey, Phillip (Journal article; Peer reviewed, 2014)Obligate avian brood parasites lay their eggs in hosts' nests and play no role in the provisioning of the progeny. Many parasites, including Cuculus cuckoos, hatch before their hosts and the altricial chick evicts hosts ... -
Reject the odd egg: Egg recognition mechanisms in parrotbills
Yang, Canchao; Møller, Anders Pape; Røskaft, Eivin; Moksnes, Arne; Liang, Wei; Stokke, Bård Gunnar (Journal article; Peer reviewed, 2014)Studies of the behavior of animals when confronted with tasks differing in complexity can improve our understanding of animal cognition and learning mechanisms. Coevolutionary interactions between brood parasites and their ... -
Resident bird species track inter-annual variation in spring phenology better than long-distance migrants in a subalpine habitat
Søraker, Jørgen Skavdal; Stokke, Bård Gunnar; Kleven, Oddmund; Moksnes, Arne; Rudolfsen, Geir; Skjærvø, Gine Roll; Vaagland, Henriette; Røskaft, Eivin; Ranke, Peter Sjolte (Journal article; Peer reviewed, 2022) -
Reviewing 30 years of studies on the Common Cuckoo - accumulated knowledge and future perspectives
Moksnes, Arne; Fossøy, Frode; Røskaft, Eivin; Stokke, Bård Gunnar (Journal article, 2013)In Europe, eggs of the Common Cuckoo (Cuculus canorus) have been found in more than 125 different host species. However, very few species are frequently parasitized. The Cuckoo is divided into several distinct races termed ... -
Sex Allocation in Relation to Host Races in the Brood-Parasitic Common Cuckoo (Cuculus canorus)
Fossøy, Frode; Moksnes, Arne; Røskaft, Eivin; Antonov, Anton Tinchov; Dyrcz, Andrzej; Moskát, Csaba; Ranke, Peter Sjolte; Rutila, Jarkko; Vikan, Johan Reinert; Stokke, Bård Gunnar (Journal article; Peer reviewed, 2012)Sex allocation theory and empirical evidence both suggest that natural selection should favour maternal control of offspring sex ratio in relation to their ability to invest in the offspring. Generalist parasites constitute ... -
Sex roles in egg recognition and egg polymorphism in avian brood parasitism
Liang, Wei; Yang, Canchao; Antonov, Anton Tinchov; Fossøy, Frode; Stokke, Bård Gunnar; Moksnes, Arne; Røskaft, Eivin; Shykoff, Jacqui A.; Møller, Anders Pape; Takasu, Fugo (Journal article, 2012)Avian brood parasites impose strong selection on their hosts leading to the evolution of antiparasite defenses like egg recognition and rejection. Discordance and template-based cognitive mechanisms may form the base for ... -
A Spatial Modeling Framework for Monitoring Surveys with Different Sampling Protocols with a Case Study for Bird Abundance in Mid-Scandinavia
Sicacha, Jorge; Pavòn-Jordàn, Diego; Steinsland, Ingelin; May, Roelof Frans; Stokke, Bård Gunnar; Øien, Ingar Jostein (Peer reviewed; Journal article, 2022)Quantifying the total number of individuals (abundance) of species is the basis for spatial ecology and biodiversity conservation. Abundance data are mostly collected through professional surveys as part of monitoring ... -
The Role of the Arctic Fox in the Breeding Success of the Snow Bunting
Lenz, Kay Banu (Master thesis, 2022)The reproductive success of breeding birds can be determined by many different factors. One factor often associated with the failure of a brood is nest depredation. To avoid depredation, different bird species implement ... -
The Role of Wildlife Education in Conservation Biology: Can awareness change Locals` Attitudes towards the Endangered African Wild Dog (Lycaon pictus) ?
Straube, Anne Cathrine Strande (Master thesis, 2013)In this master thesis, I will concentrate on the increasing interest for the research field of conservation biology, and what it can do to contribute to turn the future development in a more sustainable direction for a ... -
UV reflectance as a cue in egg discrimination in two Prinia species exploited differently by brood parasites in Taiwan
Yang, Canchao; Wang, Longwu; Hsu, Yu-Cheng; Antonov, Anton Tinchov; Moksnes, Arne; Røskaft, Eivin; Liang, Wei; Stokke, Bård Gunnar (Journal article, 2013)Birds are capable of seeing the ultraviolet light (UV) spectrum and as a consequence have evolved UV-reflective structures with signalling functions. Avian eggs also reflect in the UV spectrum but the importance of UV egg ... -
Why do brood parasitic birds lay strong-shelled eggs?
Antonov, Anton Tinchov; Stokke, Bård Gunnar; Fossøy, Frode; Liang, Wei; Moksnes, Arne; Røskaft, Eivin; Yang, Canchao; Møller, Anders Pape (Journal article, 2012)Brood parasitic birds constitute a model system for the study of coevolution. Such parasites are unique by having evolved unusually thick eggshells for their body size. Thick eggshells have been hypothesized to evolve as ...