DISTRIBUCIÓN, HISTORIA NATURAL Y CONSERVACIÓN DE Harpyhaliaetus coronatus (AVES: ACCIPITRIDAE) EN EL CENTRO–ESTE DE ARGENTINA

Fandiño, Blas; Pautasso, Andrés A.

doi:10.14409/natura.v1i44.4352

Cited by 11 publications

(7 citation statements)

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“…The species is listed as ‘Endangered’ by IUCN with a global reproductive population estimated at less than 1,000 mature individuals and a decreasing trend (BirdLife International 2016). Although the main factors threatening the species are thought to be high non-natural mortality by human persecution (Sarasola and Maceda 2006, Sarasola et al 2010, Barbar et al 2016) and habitat loss (Bellocq et al 2002, Fandiño and Pautasso 2013), there is evidence that they suffer unquantified mortality by other human related factors such as electrocution in power lines (Chebez et al 2008). Here we quantified susceptibility to electrocution and electrocution rates for birds of prey in arid and semi-arid biomes of central Argentina where we have been studying Crowned Solitary Eagles since 1999.…”

Section: Introductionmentioning

confidence: 99%

Electrocution risk for the endangered Crowned Solitary Eagle and other birds in semiarid landscapes of central Argentina

Galmes

Sarasola

Grande

et al. 2017

Bird Conservation International

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SummaryHigh mortality by electrocution has been suggested to be the main factor behind the reduction of several birds of prey populations across the world. Almost nothing is known, however, about the impact of power lines on this group of birds in the Neotropical Region. Here we estimate electrocution rates for birds on power lines covering both arid and semiarid biomes of central Argentina. We conducted six bi-monthly power line and raptor surveys throughout 355 km of lines and roads covering an area of approximately 12,000 km2. We described the structural design of 3,118 surveyed electricity pylons. We found 34 electrocuted individuals of four bird families that constitute an annual bird electrocution rate of 0.011 bird/pylon/year. Bird electrocution occurred mostly on concrete pylons with jumpers above the cross-arm. Larger birds of prey had a higher electrocution rate than smaller species. The Crowned Solitary Eagle Buteogallus coronatus was disproportionately affected by this mortality source when compared with its low population density. Electrocution incidents occurred mostly in a few electric pylon designs that represent only 10.2 % of the power pylons monitored in the study area. Therefore, the change or modification of a small fraction of pylons would almost eliminate bird electrocution incidents in our study area. Our results prove that electrocution is a relevant cause of mortality for Crowned Solitary Eagles and urgent mitigating actions are needed to reduce this mortality factor.

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Section: Introductionmentioning

confidence: 99%

Electrocution risk for the endangered Crowned Solitary Eagle and other birds in semiarid landscapes of central Argentina

Galmes

Sarasola

Grande

et al. 2017

Bird Conservation International

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“…The species is listed as endangered under the IUCN Red List with a declining world population estimated at less than one thousand reproductive individuals (BirdLife International 2016). Reduced population size and range contraction of Crowned Solitary Eagles is suspected to be human induced, including habitat loss (Bellocq et al 1998;Fandiño and Pautasso 2014), electrocution (Maceda 2007), as well as shooting (Sarasola and Maceda 2006;Sarasola et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Possibly, because Crowned Solitary Eagles occurs in low densities in remote and barely explored areas, little is known about the biology of the species and no information exists on the demography and population connectivity between geographic regions. Likewise, there is a lack of knowledge on the extent to which population decline and range contraction (Fandiño and Pautasso 2014) have affected levels of genetic diversity in this species.…”

Section: Introductionmentioning

confidence: 99%

Population genetics of the endangered Crowned Solitary Eagle (Buteogallus coronatus) in South America

et al. 2016

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The Crowned Solitary Eagle (Buteogallus coronatus) is one of the rarest and most severely threatened birds of prey in the Neotropical region. We studied levels of neutral genetic diversity, population structure and the demographic history of the species using 55 contemporary samples covering a large fraction of the species range, which were genotyped at 17 microsatellite loci. Our results indicated genetic homogeneity across the sampled regions, which may be explained by a high dispersal capability of Crowned Solitary Eagles resulting in high gene flow or relatively recent population expansion. Further demographic tests revealed that the species has experienced a recent demographic reduction, but inbreeding was not detected. The existing connectivity between geographically separated populations may have buffered the negative effects of the demographic bottleneck. Alternatively, the demographic reduction may be too recent to detect a genetic signature due to the long generation time of the species. Potential conservation strategies, including the possibility of translocations of individuals, are discussed.

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“…It is classified as endangered by the International Union for Conservation of Nature, with a global population estimated at ,1000 reproductive individuals (BirdLife International 2016). Mortality factors appear to include human persecution (Sarasola and Maceda 2006, Sarasola et al 2010, Barbar et al 2016, electrocution at power lines (Galmes et al 2017), and consequences of habitat loss (Bellocq et al 2002, Fandiño andPautasso 2013).…”

mentioning

confidence: 99%

“…The ecology of the Chaco Eagle is poorly known. The species seems to have low productivity, laying a single egg per breeding attempt (Giai 1952, Maceda 2007, Carvalho Filho et al 2009, Berkunsky et al 2012, Fandiño and Pautasso 2013. In addition, Chaco Eagles probably do not breed until 3-5 yr of age, as is true for other large eagles (Newton 1979, Del Hoyo et al 1994, and the species may breed only every 2 or 3 yr (Maceda 2007, Berkunsky et al 2012).…”

mentioning

confidence: 99%

Parental Care of the Endangered Chaco Eagle (Buteogallus coronatus) in Central Argentina

Galmes

Sarasola²,

Grande

et al. 2018

Journal of Raptor Research

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Sexual differences in parental care investment may affect individual survival or performance, and also demography. We investigated parental-care behavior of the endangered Chaco Eagle (Buteogallus coronatus) to evaluate implications for population conservation in semiarid habitats of central Argentina. From 2004 to 2012, we monitored three breeding attempts using video recording (275 hr) during the incubation period, and nine pairs during the nestling-rearing period by means of video recording (1087 hr) and focal observations at nests (232 hr). Chaco Eagles showed a strong division of parental care by sex. Females contributed significantly more than males to incubation, shading/brooding, and feeding of the nestling, whereas males provided prey to females during incubation and to nestlings during the early nestling-rearing period. Foraging males, which spend more time away from the nest, may be more exposed to anthropogenic activities and negative interactions with humans. If males are more vulnerable to such effects, this could decrease the survival of breeding males and potentially increase the recruitment of immature males to the breeding population. In this event, the ability of the inexperienced immature males that replace the adult eagles to cope with the food and care demands of the mate and offspring is critical for ensuring Chaco Eagle population maintenance.

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DISTRIBUCIÓN, HISTORIA NATURAL Y CONSERVACIÓN DE Harpyhaliaetus coronatus (AVES: ACCIPITRIDAE) EN EL CENTRO–ESTE DE ARGENTINA

Cited by 11 publications

References 0 publications

Electrocution risk for the endangered Crowned Solitary Eagle and other birds in semiarid landscapes of central Argentina

Electrocution risk for the endangered Crowned Solitary Eagle and other birds in semiarid landscapes of central Argentina

Population genetics of the endangered Crowned Solitary Eagle (Buteogallus coronatus) in South America

Parental Care of the Endangered Chaco Eagle (Buteogallus coronatus) in Central Argentina

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