Browsing NTNU Open by Author "Røskaft, Eivin"
Now showing items 101-120 of 147
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Mothers with higher twinning propensity had lower fertility in pre-industrial Europe
Rickard, Ian J.; Vullioud, Colin; Rousset, François; Postma, Erik; Helle, Samuli; Lummaa, Virpi; Kylli, Ritva; Pettay, Jenni E.; Røskaft, Eivin; Skjærvø, Gine Roll; Störmer, Charlotte; Voland, Eckart; Waldvogel, Dominique; Courtiol, Alexandre (Peer reviewed; Journal article, 2022)Historically, mothers producing twins gave birth, on average, more often than non-twinners. This observation has been interpreted as twinners having higher intrinsic fertility – a tendency to conceive easily irrespective ... -
No evidence of handling‐induced mortality in Serengeti's African wild dog population
Jackson, Craig Ryan; Masenga, Emmanuel Hosiana; Mjingo, Ernest E.; Davies, Andrew B.; Fossøy, Frode; Fyumagwa, Robert D.; Røskaft, Eivin; May, Roelof Frans (Journal article; Peer reviewed, 2018)The disappearance of an endangered African wild dog population from Serengeti National Park (SNP) led to international debate centered around one question: were researchers to blame? The “Burrows' hypothesis” postulated ... -
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 ... -
Nutritional Status of Children as an Indicator of Bushmeat Utilization in Western Serengeti
Peter Mramba, Rosemary (Master thesis, 2011)Serengeti ecosystem supports great number of large mammals ranging from grazers, browsers and carnivores. Some of these animals migrate between seasonal water sources and grasslands. The human population in the western ... -
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 ... -
Pattern and distribution of human-elephant conflicts in three conflict-prone landscapes in Myanmar
Thant, Zaw Min; May, Roelof Frans; Røskaft, Eivin (Peer reviewed; Journal article, 2021)Human-elephant conflicts (HEC) are detrimental for both humans and elephants. A better understanding of HEC enhances effective mitigation strategies and promotes the wellbeing of humans and wild elephants. This study ... -
Physiological and behavioral adaptations of impala to anthropogenic disturbances in the Serengeti ecosystems
Hunninck, Louis (Doctoral theses at NTNU;2020:150, Doctoral thesis, 2020)Anthropogenic activities are causing biodiversity loss at an unprecedented rate and attempts to ameliorate our impacts have largely failed. This thesis aimed to contribute to our understanding of how anthropogenic activities ... -
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 ... -
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 ... -
Promoting bird conservation in wetland-associated landscapes: Factors influencing avian crop damage and farmers’ attitudes
Htay, Thazin; Ringsby, Thor Harald; Røskaft, Eivin; Ranke, Peter Sjolte (Peer reviewed; Journal article, 2022)Integrating agroecosystems as bird habitats are very important for long-term conservation planning because intensified agricultural land use has been a global threat to avifauna. To make agriculture compatible with ... -
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) -
Resource utilization by the Kori bustard in the Serengeti ecosystem
Mmassy, Emmanuel Clamsen; May, Roelof Frans; Jackson, Craig Ryan; Kleven, Oddmund; Nygård, Torgeir; Bevanger, Kjetil Modolv; Røskaft, Eivin (Journal article; Peer reviewed, 2019)This study aimed to understand the movement behaviour and utilization distributions of Kori bustards in space and time in the Serengeti ecosystem. A total of 14 individuals were tracked with the aid of GPS (Geographical ... -
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 ... -
Risk of brood parasitism and predation in relation to human activity in Jahangirnagar University campus, Bangladesh
Nahid, Mominul Islam (Master thesis, 2014) -
Road Constraints on Impala (Aepyceros melampus) Behavior
Mtui, Elizabeth Kamili (Master thesis, 2014)Protected areas play a key role in safeguarding and sustaining biological diversity. The development of infrastructure in protected areas facilitates management and tourism operations. However, infrastructure can affect ... -
Schoolchildren as informants about bushmeat consumption in Western Serengeti
Manyama, Flora; Nyahongo, Julius William; Nielsen, Martin Reinhardt; Røskaft, Eivin (Journal article; Peer reviewed, 2019)Bushmeat contributes to household food security in Western Serengeti, particularly for low-income families who are unable to afford more expensive meat sources. However, as the human population grows, bushmeat demand is ... -
Servicescape of the Greater Serengeti-Mara Ecosystem: Visualizing the linkages between land use, biodiversity and the delivery of wildlife-related ecosystem services
May, Roelof Frans; Jackson, Craig Ryan; Bevanger, Kjetil Modolv; Røskaft, Eivin (Journal article; Peer reviewed, 2019)Understanding how anthropogenic activities and management actions influence the delivery of ecosystem services is complicated by the interrelated nature of diverse factors. We present a Bayesian Belief Network to highlight ... -
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 ...