Dispersal of Golden Eagles<i>Aquila chrysaetos</i>during their first year of life

Soutullo, Álvaro; Urios, Vicente; Ferrer, Miguel; Peñarrubia, Santiago García

doi:10.1080/00063650609461441

Cited by 40 publications

(54 citation statements)

References 29 publications

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“…On the other hand, effects related to the characteristics of individuals either during their development (i.e., body condition) or at the time of recruitment (i.e., sex and age) did show a detectable signal. As is expected in birds, females had greater NDD than males, (Greenwood & Harvey, 1982; del Mar Delgado et al., 2010; Muriel et al., 2016; Serrano et al., 2003; Soutullo et al., 2006), a finding that coincides with previous studies of this species (Hernández‐Matías et al., 2010). Nevertheless, determinants of NDD associated with individual characteristics appear to interact in a complex way.…”

Section: Discussionsupporting

confidence: 91%

“…In fact, there is general evidence that sex is an important source of variation in dispersal among birds (Barbraud et al., 2003). In particular, female‐biased dispersal has been a common finding among many species (Bowler & Benton, 2005; Tilgar et al., 2010), especially in territorial dimorphic birds (Acker et al., 2018; Balbontín & Ferrer, 2009; Hernández‐Matías et al., 2010; Soutullo, Urios, Ferrer, & Peñarrubia, 2006). …”

Section: Methodsmentioning

confidence: 99%

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Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird

Azpillaga

Real

Hernández‐Matías

2018

Ecology and Evolution

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Natal or prebreeding dispersal is a key driver of the functioning, dynamics, and evolution of populations. Conditions experienced by individuals during development, that is, rearing conditions, may have serious consequences for the multiple components that shape natal dispersal processes. Rearing conditions vary as a result of differences in parental and environmental quality, and it has been shown that favorable rearing conditions are beneficial for individuals throughout their lives. However, the long‐term consequences of rearing conditions on natal dispersal are still not fully understood in long‐lived birds. In this study, we aim to test the following hypotheses to address the relationship between rearing conditions and certain components of the natal dispersal process in Bonelli’s eagle (Aquila fasciata): (1) The body condition of nestlings depends on the quality of the territory and/or breeders; and (2) the survival until recruitment, (3) the age of recruitment, and (4) the natal dispersal distance (NDD) all depend on rearing conditions. As expected, nestlings reared in territories with high past productivity of chicks had better body condition, which indicates that both body condition and past productivity reflect the rearing conditions under which chicks are raised. In addition, chicks raised in territories with high past productivity and with good body condition had greater chances of surviving until recruitment. Furthermore, birds that have better condition recruit earlier, and males recruit at a younger age than females. At last, although females in good body condition exhibited higher NDD when they recruited at younger ages, this pattern was not observed in either older females or males. Overall, this study provides evidence that rearing conditions have important long‐term consequences in long‐lived birds. On the basis of our results, we advocate that conservation managers work actively in the promotion of actions aimed at improving the rearing conditions under which individuals develop in threatened populations.

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Section: Discussionsupporting

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird

Azpillaga

Real

Hernández‐Matías

2018

Ecology and Evolution

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“…For griffon vulture, we considered only a protection area of 1 km around colonies because of the vast home range associated with this species (> 4000 km 2 , García-Ripollés et al, 2011, Zuberogoitia et al, 2012. Juvenile dispersal areas were identified based on Bonelli's eagle and golden eagle tracking studies (Cadahía et al, 2005(Cadahía et al, , 2010Soutullo et al, 2006aSoutullo et al, , 2006b. Each 1 km × 1 km grid section inside of the sensitive area delimited was scored according to the species' conservation status, as indicated by the National Endangered Species Catalogue (RD 139/2011) and the Red Book of Spanish birds (Madroño et al, 2004), and the type of utilization of the area.…”

Section: Species Sensitivity Mapmentioning

confidence: 99%

Using risk prediction models and species sensitivity maps for large-scale identification of infrastructure-related wildlife protection areas: The case of bird electrocution

Pérez‐García

DeVault

Botella

et al. 2017

Biological Conservation

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A B S T R A C TThe use of systematic area-selection procedures to design protected areas can help optimize conservation actions. However, this process has rarely been used to identify high-risk mortality areas to protect wildlife from human impacts. Electrocution on power lines is one the most important human-related causes of bird mortality worldwide, especially for raptors. Identifying and correcting dangerous individual pylons can significantly reduce the number of electrocution victims, but applying this procedure at a large spatial scale is impractical. In this paper we describe a new selection process that allows for identification of high-risk mortality areas at large scales, combining spatial electrocution risk models with maps of species sensitivity to such an impact. We used the Valencia Region (eastern Spain) as our study system. The risk prediction map was built using bird electrocution records on 1 km × 1 km grids from 2000 to 2009 and the species sensitivity map was built using data on presence and use of four raptor species. The combination of both maps was compared to the distribution of Special Protected Areas and validated by local experts to identify prediction errors or gaps. The final proposal of high priority areas to protect birds from electrocution covered 16.3% of the Valencia Region. Our work supports the use of predictive models and sensitivity maps in the decision-making process to locate high priority infrastructure-related wildlife protection areas at a large scale.

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“…However, in the last few years, and mostly due to the application of satellite technology to the study of birds movements, there has been a remarkable progress in our understanding of the behaviour of Golden Eagles during their first years of life (Grant & McGrady 1999, O'Toole et al 1999, Soutullo et al 2006a, 2006b, 2006c). …”

mentioning

confidence: 99%

“…The first case of successful breeding of a Golden Eagle Aquila chrysaetos tracked from birth by satellite telemetry Vicente URIOS 1 , Alvaro SOUTULLO 1,* , Pascual LÓPEZ-LÓPEZ 1,2 , Luis CADAHÍA 3 , Rubén LIMIYANA 1 & Miguel FERRER 4 tracked using the Argos system, obtaining 3800 highly-accurate (< 20 m error) locations (see Soutullo et al 2006aSoutullo et al , 2006bSoutullo et al , 2006cSoutullo et al , 2007 for further details on the study area, the individual monitored and the tracking techniques).…”

mentioning

confidence: 99%

The First Case of Successful Breeding of a Golden EagleAquila chrysaetosTracked from Birth by Satellite Telemetry

et al. 2007

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Dispersal of Golden EaglesAquila chrysaetosduring their first year of life

Cited by 40 publications

References 29 publications

Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird

Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird

Using risk prediction models and species sensitivity maps for large-scale identification of infrastructure-related wildlife protection areas: The case of bird electrocution

The First Case of Successful Breeding of a Golden EagleAquila chrysaetosTracked from Birth by Satellite Telemetry

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