Visual and Olfactory Attributes of Artificial Nests

Rangen, Sheila A.; Clark, Robert G.; Hobson, Keith A.

doi:10.1642/0004-8038(2000)117[0136:vaoaoa]2.0.co;2

Cited by 83 publications

(50 citation statements)

References 67 publications

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“…the internal validity). The structure and location of the artificial nests were carefully simulated according to local natural nests of the species, thus avoiding problems of 'wicker basket' nests [7]. Artificial nests containing quail eggs have been claimed to inaccurately simulate natural predation intensities owing to a varying presence of small-mouthed mammals unable to break these eggs [6].…”

Section: Discussionmentioning

confidence: 99%

“…First and most importantly, nest predation risk can differ among artificial and natural nests because each might be predated by different species [5]. Second, the wide difference between the level of sophistication of artificial nests and the characteristics of experimental eggs has been claimed to be a major discrepancy [6,7]. Third, the absence of parental care might lead to an overestimate of predation rates at artificial nests [8].…”

Section: Introductionmentioning

confidence: 99%

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Predation of experimental nests is linked to local population dynamics in a fragmented bird population

et al. 2011

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Artificial nest experiments (ANEs) are widely used to obtain proxies of natural nest predation for testing a variety of hypotheses, from those dealing with variation in life-history strategies to those assessing the effects of habitat fragmentation on the persistence of bird populations. However, their applicability to real-world scenarios has been criticized owing to the many potential biases in comparing predation rates of artificial and natural nests. Here, we aimed to test the validity of estimates of ANEs using a novel approach. We related predation rates on artificial nests to population viability analyses in a songbird metapopulation as a way of predicting the real impact of predation events on the local populations studied. Predation intensity on artificial nests was negatively related to the species' annual population growth rate in small local populations, whereas the viability of large local populations did not seem to be influenced, even by high nest predation rates. The potential of extrapolation from ANEs to real-world scenarios is discussed, as these results suggest that artificial nest predation estimates may predict demographic processes in small structured populations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Predation of experimental nests is linked to local population dynamics in a fragmented bird population

et al. 2011

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“…Nest predation experiments using real or artificial eggs may change (elevate or decrease) nest predation rates because the di#ering odours of the eggs may attract or discourage predation by small mammals (e.g., Rangen et al 2000). Conversely, plasticine eggs might not be useful for assessing many reptilian predators, because these predators use smell and infrared radiation from the body heat of eggs and incubating birds to hunt, and plasticine eggs lack both.…”

Section: Discussionmentioning

confidence: 99%

Nest Form, Colour and Nesting Habitat Affect Predation Rates of Australasian Warblers (Gerygone spp.) in Tropical Mangroves

Sato¹,

Morimoto²,

Noske

et al. 2010

J. Yamashina Inst. Ornithol.

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Abstract. Nest predation is high in mangals (mangrove communities) of the Australian monsoon tropics. The Large-billed Gerygone Gerygone magnirostris and Mangrove Gerygone G. levigaster are warbler-like birds that build domed nests, which are very di#erent from each other in size, form and colour. Large-billed Gerygone forages and builds nests along tidal creeks where vegetation is tall and dense, whereas Mangrove Gerygone primarily nests in shrubs around the edges of bare salt flats and forages in both habitats. Using artificial nests that mimicked those of the two species, we tested whether di#erences in nest appearance, including form and colour, were adaptations to avoid nest predation. Artificial Mangrove Gerygone nests in their main nesting habitat were predated less frequently than those on tidal creeks, whereas predation rates on artificial Large-billed Gerygone nests did not di#er between habitats. Our results suggest that Mangrove Gerygone nests are built in the primary breeding habitat to avoid nest predators. In addition, we identified a nest predator, the Yellow Oriole Oriolus flavocinctus.

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“…Apesar dos estudos controversos em relação ao odor presente nos ovos sintéticos (BAYNE & HOBSON 1999, RANGEN et al 2000 não acreditamos que os predadores olfativos utilizaram desse recurso para encontrar os ninhos, pois o nosso experi- Figuras 4-5. Freqüência (%) de registro de predação, a partir dos vestígios de ovos de codorna e de canário encontrados nos ninhos artificiais no solo (4) e aéreo (5), em relação ao total de ninhos examinados, na Ilha Anchieta, São Paulo.…”

Section: Discussionunclassified

Predação de ninhos artificiais em uma ilha na Mata Atlântica: testando o local e o tipo de ovo

Alvarez

Galetti

2007

Rev. Bras. Zool.

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Experimentos com ninhos artificiais são utilizados para testar hipóteses ecológicas e comportamentais que influenciam na predação de ninhos naturais. O tamanho do ovo, a textura da casca e a cor podem influenciar na taxa de predação, porém poucos estudos avaliam qual modelo de ovo é o mais adequado para simular a predação de ninhos em áreas tropicais. O objetivo deste trabalho foi comparar a predação de diferentes modelos de ovos (ovos de codorna, massa de modelar e canários) no solo e a 1,30 m de altura no sub-bosque. O experimento foi realizado Ilha Anchieta, Ubatuba, São Paulo, Brasil. Foi encontrada uma diferença significativa na taxa de predação entre os ovos de codorna (71,87%) e sintéticos (93,75%) e entre os ovos de codorna e de canário (100%) no solo. Entretanto, não houve diferença significativa entre os ovos sintéticos e de canário. Os ninhos no sub-bosque apresentaram um padrão diferenciado do solo quando se refere aos ovos de codorna (25%) e sintéticos (28,1%), mas houve diferenças significativas quando os ovos de canário foram comparados com os ovos sintéticos e de codorna. Nosso trabalho demonstrou que diferentes tipos de ovos sobre uma mesma pressão de mesopredadores apresentaram taxas de predação diferentes. Portanto, estudos que avaliam o sucesso reprodutivo da avifauna baseado na predação de ninhos artificiais devem considerar a utilização de diferentes tipos de ovos e estratos na vegetação.

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Visual and Olfactory Attributes of Artificial Nests

Cited by 83 publications

References 67 publications

Predation of experimental nests is linked to local population dynamics in a fragmented bird population

Predation of experimental nests is linked to local population dynamics in a fragmented bird population

Nest Form, Colour and Nesting Habitat Affect Predation Rates of Australasian Warblers (Gerygone spp.) in Tropical Mangroves

Predação de ninhos artificiais em uma ilha na Mata Atlântica: testando o local e o tipo de ovo

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