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Ivan Afonso Jordana

Ivan Afonso Jordana
Conselh Generau d'Aran

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28
Publications
7,595
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184
Citations
Citations since 2016
18 Research Items
160 Citations
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20162017201820192020202120220102030

Publications

Publications (28)
Article
Full-text available
Estimating the size of small populations of large mammals can be achieved via censuses, or complete counts, of recognizable individuals detected over a time period: minimum detected (population) size (MDS). However, as a population grows larger and its spatial distribution expands, the risk of underestimating population size using MDS rapidly incre...
Article
Full-text available
Global Positioning System (GPS) tracking offers key information in the study of movement ecology of threatened species. Nevertheless, the placement of GPS devices requires animal capture and handling, which may represent a challenge to the individual’s survival after release, mainly due to cap‐ ture myopathy. The Pyrenean Capercaillie (Tetrao uroga...
Preprint
Full-text available
Connectivity is a key driver of the recovery and expansion of endangered populations and has to be evaluated in management plans. In practice, connectivity is difficult to quantify especially for rare and elusive species. Here, we use spatial capture-recapture (SCR) models with an ecological detection distance to identify barriers to movement. We f...
Preprint
Full-text available
Abundance of small populations of large mammals may be assessed using complete counts of the different individuals detected over a time period, so-called minimum detected size (MDS). However, as population is growing larger and its distribution is expanding wider, the risk of under-estimating population size using MDS is increasing sharply due to t...
Article
Full-text available
The increases in ungulate populations and hunting bags throughout Europe and North America have resulted in higher carcass numbers available for mesocarnivore species in temperate and boreal forests. The increase in food resources can sustain denser predator populations, potentially affecting prey species such as the threatened western capercaillie...
Article
Coexistence of humans and large carnivores is a major challenge for conservation and management, especially in human‐modified landscapes. Ongoing recovery of some large carnivore populations is good conservation news, but it also brings about increased levels of conflict with humans. Compensation payments and preventive measures are used worldwide...
Article
The publisher regret that the presentation of Figure 3 in the original version of the above article was incorrectly presented. The data in the image were inadvertently omitted during publication process.
Article
Full-text available
Mammals usually adjust behavioral patterns when exposed to disturbances. Elusiveness and low-risk time selection may reduce their stress in periods of highest risk. In Europe, brown bears (Ursus arctos) coexist with humans in densely populated and modified landscapes and, consequently, are exposed to human-caused disturbances during the daytime hou...
Presentation
Full-text available
Talk presented at the 29th International Congress for Conservation Biology ICCB : https://conbio.org/mini-sites/iccb-2019/ ) in Kuala Lumpur (Malaysia) on the 24th of July 2019. Summary : The political fragmentation and the high species mobility imply that most European large carnivore populations are transboundary, which makes conservation effort...
Article
Full-text available
Since its release in 1999, the Pyros male has monopolized the reproduction of this incipient bear population. Already in Slovenia, in 1999, he impregnated the females Ziva and Mellba before they were captured and moved to the central Pyrenees. The appearance of children, grandchildren and great-grandchildren of Pyros raised the alarm of a possible...
Article
Full-text available
Understanding the movement of threatened species is important if we are to optimize management and conservation actions. Here, we describe the age and sex specific spatial and temporal ranging patterns of 19 bearded vultures Gypaetus barbatus tracked with GPS technology. Our findings suggest that spatial asymmetries are a consequence of breeding st...
Preprint
Full-text available
Human administrative borders have no effect on wild animals, and the vast home ranges of large carnivores often cause them to live simultaneously on the territory of two or more countries or jurisdictions with different management policies. Here, we investigate the importance of transboundary population monitoring using as a case study the Pyrenean...
Article
Full-text available
Mesopredator control has long been used to alleviate the effect of elevated predation pressure on vulnerable, threatened or valuable species. However, the convenience of using mesopredator controls is technically questionable and scientifically-sound research is therefore required to evaluate the impact of predation on prey case by case. In this st...
Article
Full-text available
Animal movement patterns and use of space depend upon environmental resources (i.e., food availability), and on conspecific and interspecific interactions. We studied the home range of seven territorial Bonelli’s Eagles (Aquila fasciata) tracked by GPS satellite telemetry over a period of 4–5 years to determine home range characteristics and annual...
Book
Full-text available
The introduction of this book reminds the strong Pyrenean responsibility about the conservation of an original form of Capercaillie (Tetrao urogallus aquitanicus) at ecological and genetic point of view, which is endemic of this mountain range. It evaluates the proportion of Pyrenean forests concerned by this stakes, and indicates in what mind it w...

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