Hugo Valls

Dr. Hugo Valls

orcid

Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 March 2018 in Animal Conservation
Verified
Journal Article
Open access
PDF file
HVHugo Valls
Hugo Valls
SCS. Chamaillé‐Jammes
S. Chamaillé‐Jammes
MGM. de Garine‐Wichatitsky
M. de Garine‐Wichatitsky
APA. Perrotton
A. Perrotton
NCN. Courbin
N. Courbin
HFH. Fritz
H. Fritz
Understanding the spatiotemporal dynamics of human‐wildlife interfaces is important for the sustainable management of protected areas and wildlife conservation. We investigated the drivers of domestic and wild herbivore habitat selection at the edge of an unfenced protected area adjacent to Hwange National Park, Zimbabwe. We used GPS data to quantify the movement patterns of elephant bulls, buffalo and cattle at multiple scales and according to seasonal changes of surface water availability. Cattle, elephant and buffalo prefer open grassland habitats found close to water but elephant and buffalo avoid cattle differently. During the rainy season, cattle enter the protected area daily; buffalo avoid cattle completely at the home range scale, whereas elephant bulls avoid cattle at finer scales by favoring temporal niche shift. Elephant bulls avoid direct encounters with cattle (or people) during the day but come closer to the boundary and to water at night when cattle are kept in enclosures close to the homesteads. During the dry season, when cattle range further into the protected area in search of forage, buffalo and cattle spatial overlap increases as water dependence takes precedence over avoidance. Elephant bulls range closer to the boundary at night and increase the number of excursions into the Communal Area. Cattle herding creates a buffer zone between wildlife areas and human settlements because wild herbivores strongly avoid livestock and people. However, avoidance only lasts as long as resources are abundant. Our study suggests that long‐term planning of both artificial water provisioning and traditional cattle herding practices could help maintaining spatial segregation and thus mitigate conservation conflicts such as pathogen transmission, crop raiding or livestock depredation.

1 November 2017 in Biological Conservation
Verified
Journal Article
Closed access
ATArnold Tshipa
Arnold Tshipa
HVHugo Valls
Hugo Valls
HFHervé Fritz
Hervé Fritz
KCKai Collins
Kai Collins
LSLovelater Sebele
Lovelater Sebele
SCSimon Chamaillé-Jammes
Simon Chamaillé-Jammes

27 September 2018 in Koedoe - African Protected Area Conservation and Science
Verified
Journal Article
Open access
PDF file
EAEduardo Moraes Arraut
Eduardo Moraes Arraut
ALAndrew J. Loveridge
Andrew J. Loveridge
SCSimon Chamaillé
Simon Chamaillé
HVHugo Valls
Hugo Valls
DMDavid W. Macdonald
David W. Macdonald
Koedoe - African Protected Area Conservation and Science

8 November 2017 in Landscape Ecology
Verified
Journal Article
Closed access
PDF file
HVHugo Valls
Hugo Valls
MGMichel De Garine-Wichatitsky
Michel De Garine-Wichatitsky
HFHervé Fritz
Hervé Fritz
SCSimon Chamaillé-Jammes
Simon Chamaillé-Jammes

2 October 2020 in Remote Sensing
Verified
Journal Article
Open access
PDF file
FRFlorent Rumiano
Florent Rumiano
EWElodie Wielgus
Elodie Wielgus
EMEve Miguel
Eve Miguel
SCSimon Chamaillé
Simon Chamaillé
HVHugo Valls
Hugo Valls
ATAnnelise Tran
Annelise Tran
Interfaces between protected areas and their peripheries in southern Africa are subject to interactions between wildlife and livestock that vary in frequency and intensity. In these areas, the juxtaposition between production and conservation land uses in a context of increasing anthropisation can create issues associated with human-wildlife coexistence and raises concerns for biodiversity conservation, local development and livelihoods. This literature review aimed at addressing the need to consolidate and gather in one article current knowledge on potential uses of satellite remote sensing (SRS) products by movement ecologists to investigate the sympatry of wildlife/domestic ungulates in savanna interface environments. A keyword querying process of peer reviewed scientific paper, thesis and books has been implemented to identify references that (1) characterize the main environmental drivers impacting buffalo (Syncerus caffer caffer) and cattle (Bos taurus & Bos indicus) movements in southern Africa environments, (2) describe the SRS contribution to discriminate and characterize these drivers. In total, 327 references have been selected and analyzed. Surface water, precipitation, landcover and fire emerged as key drivers impacting the buffalo and cattle movements. These environmental drivers can be efficiently characterized by SRS, mainly through open-access SRS products and standard image processing methods. Applying SRS to better understand buffalo and cattle movements in semi-arid environments provides an operational framework that could be replicated in other type of interface where different wild and domestic species interact. There is, however, a need for animal movement ecologists to reinforce their knowledge of remote sensing and/or to increase pluridisciplinary collaborations.

7 October 2019 in Revue d’élevage et de médecine vétérinaire des pays tropicaux
Verified
Journal Article
Open access
PDF file
ASAdam K.L.S. Sounon
Adam K.L.S. Sounon
AIAlexandre Ickowicz
Alexandre Ickowicz
MLMatthieu Lesnoff
Matthieu Lesnoff
SMSamir Messad
Samir Messad
HVHugo Valls
Hugo Valls
MHMarcel R.B. Houinato
Marcel R.B. Houinato
Deux principaux systèmes d’élevage bovin cohabitent dans le bassin de la Donga au nord du Bénin : l’élevage semi-sédentaire et l’élevage mobile. Ce bassin, situé dans la zone agroécologique subhumide de l’Afrique de l’Ouest, a subi ces dernières décennies deux changements majeurs : a) une augmentation des besoins en produits animaux et b) l’expansion des terres cultivées qui entraîne une diminution de l’accès aux ressources fourragères et à l’eau, une plus grande mobilité des troupeaux, et des conflits plus fréquents entre cultivateurs et éleveurs mobiles. Face à ces contraintes, les pouvoirs publics privilégient la sédentarisation des éleveurs mobiles. L’élevage mobile étant pourvoyeur de jeunes animaux aux élevages semi-sédentaires, la dynamique de sédentarisation crée une incertitude quant à l’approvisionnement de la région en bétail bovin et en viande par un élevage semi-sédentaire qui deviendrait largement majoritaire. Pour appréhender la question de besoins croissants en produits animaux, la production de bétail a été simulée afin d’évaluer l’effet d’une incitation des pouvoirs publics à la sédentarisation des éleveurs mobiles. Les productivités numérique et en viande ont été simulées sous différentes hypothèses d’amélioration des performances zootechniques des élevages semi-sédentaires. L’ensemble des scénarios ont été construits à partir de l’hypothèse de l’augmentation du cheptel semi-sédentaire directement liée à la sédentarisation d’une partie des éleveurs mobiles. Une simulation obtenue à l’aide du modèle de projection démographique Dynmod suggère que la sédentarisation des éleveurs mobiles romprait la complémentarité locale entre les systèmes d’élevage et conduirait à une perte de production de viande. En outre, aucun des scénarios d’amélioration explorés ne suffirait à compenser la perte de production de viande résultant de la politique de sédentarisation. Pour maintenir la production de viande bovine par les éleveurs semi-sédentaires il faudrait développer les liens commerciaux régionaux avec les élevages des pays sahéliens.