Darras, Kevin Felix Arno

[["dc.bibliographiccitation.firstpage","509"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Wildlife Diseases"],["dc.bibliographiccitation.lastpage","511"],["dc.bibliographiccitation.volume","55"],["dc.contributor.author","Janra, Muhammad N."],["dc.contributor.author","Herwina, Henny"],["dc.contributor.author","Febria, Fuji A."],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Mulyani, Yeni A."],["dc.date.accessioned","2019-07-23T09:12:49Z"],["dc.date.available","2019-07-23T09:12:49Z"],["dc.date.issued","2019"],["dc.description.abstract","We report knemidokoptiasis in a wild male Little Spiderhunter ( Arachnothera longirostra cinereicollis; family Nectariniidae; order Passeriformes) from Jambi, Sumatra, Indonesia, in September 2017. Microscopic examination of a scraping from its leg lesion revealed the presence of Knemidocoptes jamaicensis as the cause of the condition."],["dc.identifier.doi","10.7589/2018-02-054"],["dc.identifier.pmid","30226802"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61904"],["dc.language.iso","en"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.eissn","1943-3700"],["dc.relation.issn","0090-3558"],["dc.subject.gro","sfb990_journalarticles"],["dc.subject.gro","sfb990_abs"],["dc.title","Knemidokoptiasis in a Wild Bird, the Little Spiderhunter ( Arachnothera longirostra cinereicollis), in Sumatra, Indonesia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","339"],["dc.bibliographiccitation.issue","04"],["dc.bibliographiccitation.journal","Environment and Development Economics"],["dc.bibliographiccitation.lastpage","360"],["dc.bibliographiccitation.volume","24"],["dc.contributor.author","Krishna, Vijesh V."],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Grass, Ingo"],["dc.contributor.author","Mulyani, Yeni A."],["dc.contributor.author","Prawiradilaga, Dewi M."],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Qaim, Matin"],["dc.date.accessioned","2020-12-10T15:22:21Z"],["dc.date.available","2020-12-10T15:22:21Z"],["dc.date.issued","2019"],["dc.description.abstract","This study examines conservation effects of wildlife trade using demand and supply data from caged-bird markets in Sumatra, Indonesia. When consumers have a strong preference for species rarity, trade could result in wildlife overexploitation and species extinction. Results from a choice experiment show that buyers of caged birds indeed value species rarity. However, not all rare species are equally preferred. Species that are frequently traded lose their rarity value, even if rare in the wild. Analysis of time-series data collected from traders over a period of 20 months between 2013 and 2015 reveals an inelastic supply function for rare species, with market arrivals being insensitive to price changes. This may be due to a declining stock of rare species in the wild. Bird trade together with habitat loss can lead to extinction of a number of rare species in Indonesia. Several policy approaches on regulating caged-bird markets are discussed."],["dc.identifier.doi","10.1017/S1355770X19000081"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73366"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation","SFB 990 | C | C07: Einflussfaktoren von Landnutzungswandel und sozioökonomische Auswirkungen für ländliche Haushalte"],["dc.relation.issn","1355-770X"],["dc.relation.issn","1469-4395"],["dc.relation.orgunit","Department für Agrarökonomie und Rurale Entwicklung"],["dc.rights","CC BY 4.0"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Wildlife trade and consumer preference for species rarity: an examination of caged-bird markets in Sumatra"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e01954"],["dc.bibliographiccitation.journal","Ecological Applications : A Publication of the Ecological Society of America"],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Batáry, Péter"],["dc.contributor.author","Furnas, Brett J."],["dc.contributor.author","Grass, Ingo"],["dc.contributor.author","Mulyani, Yeni A."],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2019-07-23T06:52:53Z"],["dc.date.available","2019-07-23T06:52:53Z"],["dc.date.issued","2019"],["dc.description.abstract","Autonomous sound recording techniques have gained considerable traction in the last decade, but the question remains whether they can replace human observation surveys to sample sonant animals. For birds in particular, survey methods have been tested extensively using point counts and sound recording surveys. Here, we review the latest evidence for this taxon within the frame of a systematic map. We compare sampling effectiveness of these two survey methods, the output variables they produce, and their practicality. When assessed against the standard of point counts, autonomous sound recording proves to be a powerful tool that samples at least as many species. This technology can monitor birds in an exhaustive, standardized, and verifiable way. Moreover, sound recorders give access to entire soundscapes from which new data types can be derived (vocal activity, acoustic indices). Variables such as abundance, density, occupancy, or species richness can be obtained to yield data sets that are comparable to and compatible with point counts. Finally, autonomous sound recorders allow investigations at high temporal and spatial resolution and coverage, which are more cost effective and cannot be achieved by human observations alone, even though small-scale studies might be more cost effective when carried out with point counts. Sound recorders can be deployed in many places, they are more scalable and reliable, making them the better choice for bird surveys in an increasingly data-driven time. We provide an overview of currently available recorders and discuss their specifications to guide future study designs."],["dc.identifier.doi","10.1002/eap.1954"],["dc.identifier.pmid","31206926"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61854"],["dc.language.iso","en"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.issn","1051-0761"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Autonomous sound recording outperforms human observation for sampling birds: a systematic map and user guide"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e0154876"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","PLOS ONE"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Prabowo, Walesa Edho"],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Clough, Yann"],["dc.contributor.author","Toledo-Hernandez, Manuel"],["dc.contributor.author","Arlettaz, Raphael"],["dc.contributor.author","Mulyani, Yeni A."],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:50:42Z"],["dc.date.available","2017-09-07T11:50:42Z"],["dc.date.issued","2016"],["dc.description.sponsorship","Open-Access Publikationsfonds 2016"],["dc.identifier.doi","10.1371/journal.pone.0154876"],["dc.identifier.gro","3149863"],["dc.identifier.pmid","27224063"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13337"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6569"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.issn","1932-6203"],["dc.rights.access","openAccess"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Bird Responses to Lowland Rainforest Conversion in Sumatran Smallholder Landscapes, Indonesia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2575"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Journal of Applied Ecology"],["dc.bibliographiccitation.lastpage","2586"],["dc.bibliographiccitation.volume","55"],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Batáry, Péter"],["dc.contributor.author","Furnas, Brett"],["dc.contributor.author","Celis‐Murillo, Antonio"],["dc.contributor.author","Van Wilgenburg, Steven L."],["dc.contributor.author","Mulyani, Yeni A."],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2019-07-23T08:10:02Z"],["dc.date.available","2019-07-23T08:10:02Z"],["dc.date.issued","2018"],["dc.description.abstract","Autonomous sound recording is a promising sampling method for birds and other vocalizing terrestrial wildlife. However, while there are clear advantages of passive acoustic monitoring methods over classical point counts conducted by humans, it has been difficult to quantitatively assess how they compare in their sampling performance. Quantitative comparisons of species richness between acoustic recorders and human point counts in bird surveys have previously been hampered by the differing and often unknown detection ranges or sound detection spaces among sampling methods. We performed two meta-analyses based on 28 studies where bird point counts were paired with sound recordings at the same sampling sites. We compared alpha and gamma richness estimated by both survey methods after equalizing their effective detection ranges. We further assessed the influence of technical sound recording specifications (microphone signal-to-noise ratio, height and number) on the bird sampling performance of sound recorders compared to unlimited radius point counts. We show that after standardizing detection ranges, alpha and gamma richness from both methods are statistically indistinguishable, while there might be an avoidance effect in point counts. Furthermore, we show that microphone signal-to-noise ratio (a measure of its quality), height and number positively affect performance through increasing the detection range, allowing sound recorders to match the performance of human point counts. Synthesis and applications. We demonstrate that when used properly, high-end sound recording systems can sample terrestrial wildlife just as well as human observers conducting point counts. Correspondingly, we suggest a first standard methodology for sampling birds with autonomous sound recorders to obtain results comparable to point counts and enable practical sampling. We also give recommendations for carrying out effective surveys and making the most out of autonomous sound recorders."],["dc.identifier.doi","10.1111/1365-2664.13229"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61880"],["dc.language.iso","en"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.issn","0021-8901"],["dc.relation.issn","1365-2664"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Comparing the sampling performance of sound recorders versus point counts in bird surveys: A meta‐analysis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]