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Loup à crinière
Chrysocyon brachyurus(Illiger, 1815)
Description
espèce de mammifères
Source : Wikidata
Graphe en cours d’indexation
Calcul du tissu écologique de Chrysocyon brachyurus.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
NT · Quasi menacée?Inconnue- Évaluation
- 2015 · v3.1
- Altitude
- 0 – 2000 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
To account for the effects of habitat loss, one of the main threats to Maned Wolf, on persistence, simulations of the effects of habitat loss using detailed data on deforestation rates in Brazil were performed (and measured as permanent reduction in K or carrying capacity). This was modelled as a linear decrease (1.5% / annum) in carrying capacity over one generation or five years, which effectively reduced the maximum size a population could attain. The simulation model showed that small populations were affected more than large populations, with populations <25 individuals showing negative growth rates due to their vulnerability to stochastic processes. Populations with ≤25 individuals declined with a high probability of extinction within 100 years; however, populations of 50-100 individuals persisted, albeit with low levels of genetic diversity. Therefore, several hundred wolves may be needed to maintain a long-term, viable population depending upon the severity of threats, management goals, and acceptable levels of risk for wildlife managers.
In the last 10 years, the main habitats of Maned Wolf in Brazil have been subject to intense deforestation. For the current assessment, a population viability model was generated using recent observed deforestation rates, ranging from 1.0 to 1.5% per year over 15 years (three generations). These results suggested a 20% reduction in the metapopulation based on these rates of loss. If deforestation rates reach a loss of 2% per year, the simulation suggests a 56% reduction in the Brazilian population in 100 years (Paula et al. 2008, Paula and Desbiez 2014). The areas of supposed distribution expansion were not accounted for in this simulation since they represent edge areas for the distribution range and because from what is known presently these areas do not seem to hold stable and resident populations of the species.
Maned Wolves are found at low densities throughout the range. Even in Brazilian protected areas, population densities range from 0.01 to 0.05 animals/km2 (Silveira 1999, Rodrigues 2002). The highest density reported is 0.08 individuals/km2 in Serra da Canastra, Minas Gerais, Brazil (Paula et al. 2013). In Argentina, information about wild populations is scarce and the northern population is thought to be declining (Soler and Carenton 2008). Despite the lack of information on population densities across it range, high food availability may potentially support higher population densities (Amboni 2007, Azevedo 2008).
Menaces identifiées(7 menaces classées CMP-IUCN)
4_1Roads & railroadsNegligible declinesMajority (50-90%)Ongoing8_1_2Named speciesNegligible declinesMinority (<50%)Ongoing8_5_2Named speciesNegligible declinesMinority (<50%)Ongoing8_5_2Named speciesNegligible declinesMinority (<50%)Ongoing2_1_3Agro-industry farmingSlow, Significant DeclinesMajority (50-90%)Ongoing2_3_3Agro-industry grazing, ranching or farmingSlow, Significant DeclinesMajority (50-90%)Ongoing5_1_3Persecution/controlSlow, Significant DeclinesMajority (50-90%)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
The intensive conversion of native habitat for agriculture results in loss of optimal habitat and creation of areas often subject to desertification. The fragmentation of highly suitable habitat causes isolation of subpopulations and often results in the remaining intact landscape become intersected by high speed roads. Many Maned Wolves are killed on roadways throughout its range. In central Brazil, road kills are a threat of major concern potentially leading to local extinction of small, isolated populations as estimates range from four to 10 individuals killed/year in some regions (Paula and Gambarini 2013, Rodrigues et al. 2014). Similar impact of vehicular collisions was detected in marginal populations from Argentina where 21 Maned Wolves were reported dead along National Route 34, concentrated between 2000 and 2005 (Orozco et al. 2013a). The same negative effect is potentially true in the humid Chaco of Paraguay where increased traffic on the Trans-Chaco highway leads to numerous road kills each year (A.J. Giordano pers. comm. 2015). Extreme climatic conditions such as uncontrolled fires and droughts are likely to exacerbate the scarcity of living resources and consequently the loss on roadways, as Maned Wolves are forced to travel farther for food and water (Pautasso et al. 2009, Orozco et al. 2013a); the latter is especially important during periods when females are lactating (Emmons 2014).
Direct interactions with humans also pose a threat to the species. Conflicts with people, road mortality, the potential for infectious diseases spread by domestic dogs and direct persecution resulting from widely held superstitions and beliefs, are the primary threats facing Maned Wolves (Songsasen and Rodden 2010). In some areas of Argentina, Maned Wolves are persecuted with hunting, trapping, and shooting due to a mix of long-standing cultural beliefs, general ignorance of the species, and trophy hunting (Orozco et al. 2009, Orozco et al. 2013a, Soler 2014). In southeastern Santiago del Estero (Argentina), 30 Maned Wolves were reported sold to game ranches in a 10-year period (Orozco et al. 2013a). In Brazil and Paraguay, this targeted persecution of Maned Wolves extends beyond the traditional and natural medicine needs to include the low public tolerance of poultry depredation, for which Maned Wolves are constantly blamed (Paula et al. 2013, Cartes et al. 2014, A.J. Giordano pers. comm. 2015). In some areas this hunting pressure is so high it is having a significant negative effect on local Maned Wolf numbers (Paula et al. 2013). While illegal trade is not common, Orozco et al. (2009) found it was widespread in Argentina, and even included the sale of young animals or pups to private zoos and collections. Of the Maned Wolves kept in captivity in Argentina during the last five years 68% were wild born and came from/were victims of illegal trade, road collisions or were orphaned after their mother was killed (P. Gonzalez Ciccia pers. comm. 2015).
Domestic dogs pose a serious threat to Maned Wolves on several levels, as often times domestic dogs accompany humans into the field for recreation and hunting. In addition, both Maned Wolves and dogs overlap in their use of habitat that has been converted to agriculture and pasture. Dogs are known to pursue Maned Wolves, which often results in the killing of the animal (Soler et al. 2005, Pautasso et al. 2009, Orozco et al. 2013a, Soler 2014, A.J. Giordano pers. comm. 2015). In a study carried out in Argentina, 26% of sightings by local villagers involved close contact between Maned Wolves and domestic dogs (Orozco et al. 2013a). Dogs are also a source of infectious diseases and parasites. However the epidemiological effects remain unclear for Maned Wolf conservation. Rural domestic dog populations in Argentina had very high seroprevalence for Neospora caninum, canine coronavirus, canine adenovirus, Dirofilara immitis, canine distemper virus, Toxoplasma gondii, and L. interrogans spp. In the same area, all of these agents (except N. caninum, Toxoplasma gondii and CCV) were serologically positive in local Maned Wolves (Orozco et al. 2013a). In a Bolivian population, Maned Wolves were serologically positive for two domestic dog pathogens (morbillivirus and parvovirus) that can cause pup mortality and high levels of potentially fatal (Dirofilara immitis) and debilitating (Dioctophyme renale) parasites were detected (Deem and Emmons 2005, Bronson et al. 2008, Deem et al. 2012, Emmons 2014). In Brazil, Maned Wolves were serologically positive for several dog-related infectious diseases including parvovirus, canine distemper virus, coronavirus, and leishmaniosis (Paula et al. 2014). These data from Bolivia, Brazil and Argentina suggest that other wild populations are at risk in areas where domestic dogs are present (May Jr and Felippe 2014). The frequent use of dogs for herding and hunting, along with their frequent foraging in natural habitats, could favour direct or indirect transmission of multiple pathogens (Orozco et al. 2013a).
Habitats préférentiels (classification IUCN)
1_5Forest - Subtropical/Tropical Dry★1_6Forest - Subtropical/Tropical Moist Lowland★2_1Savanna - Dry★2_2Savanna - Moist★3_5Shrubland - Subtropical/Tropical Dry★3_6Shrubland - Subtropical/Tropical Moist★4_5Grassland - Subtropical/Tropical Dry★4_6Grassland - Subtropical/Tropical Seasonally Wet/Flooded★14_1Artificial/Terrestrial - Arable Land14_2Artificial/Terrestrial - Pastureland5_4Wetlands (inland) - Bogs, Marshes, Swamps, Fens, Peatlands
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
It is included on CITES Appendix II. Maned Wolves are protected by law in many parts of their range, but enforcement is frequently problematic. This species is classified as Endangered in Argentina (Ojeda et al. 2012) and declared a Provincial Natural Monument in select areas, including Santa Fe, Corrientes, and Chaco (Soler 2014). It is classified as Vulnerable in Brazil (Paula et al. 2013). Hunting is prohibited in Brazil, Paraguay, Bolivia and in Argentina. The species is included in the United States Endangered Species list.
Presence in protected areas
This species occurs in many protected areas in Argentina, Bolivia, Brazil, Paraguay and Peru
Occurrence in captivity
As of January 2012, 150 institutions held a total of 394 Maned Wolves (182 males, 211 females, one unknown) in captivity (Holland 2014).
Other
In Brazil, conservation actions to reverse population decline have focused on addressing the issues associated with the human dimension. Raising public awareness and using proactive methods to prevent conflict are among the main tools used in increasing tolerance towards the species. In addition, campaigns to vaccinate domestic dogs in areas that border or overlap with Maned Wolf populations have been ongoing for several years (Paula et al. 2014). New proposals to reduce the high number of road kills in southeast Brazil have been discussed at a political level. The 2005 Population and Habitat Viability Assessment workshop for Maned Wolves generated an Action Plan aimed at addressing the five main themes that effect the long-term conservation of the species across its distribution: 1) threats and habitat management; 2) distribution and status; 3) environmental education, social aspects, and economic alternatives; 4) ex-situ conservation; and 5) population dynamics and modelling (Paula et al. 2008). Each of these themes address gaps in knowledge for the species or specific problems associated with the species survival. Each theme was broken into multiple goals with specific actions set to address the associated problems, names of personnel responsible for seeing the action is completed, timeline for when these actions should be completed, associated costs, potential obstacles, and expected outcome defined (Paula et al. 2008). As a follow up to this workshop, Brazil and Argentina used information on recent and ongoing changes in the species’ status and threats to modify the international Action plan and generate specific National Action Plans that could help direct local efforts in Maned Wolf conservation. In 2014, the Brazilian government officially recognized the technical advisory group (originally formed in 2010) aimed at assisting the government on implementing the strategies developed in the National Action Plan. A Maned Wolf working group has also been implemented in continental level under the coordination of the IUCN SSC Canid Specialist Group, with an aim to ensure long-term coordination among researchers across the Maned Wolves distribution and work together to share strategies directed at reversing population decline.
In Argentina, the GAAG (Grupo Argentino Aguará Guazú or Maned Wolf Argentine Group) was founded as a national strategy to develop, manage, execute, and monitor the Action Plan for the Maned Wolf’s conservation in Argentina. The group comprises 16 institutional members, which includes provincial and national government agencies, zoos, NGOs and research groups from universities and museums. Between 2002 and 2011, GAAG carried out 10 regional workshops aimed at: 1) mapping threats for Maned Wolf in natural habitats; 2) prioritizing conflicts in the wild and problems in captivity; 3) prioritizing strategies and actions for its ex situ and in situ conservation; 4) developing recommendations for conservation in the wild and management in captivity; 5) developing efficient education strategies for Maned Wolf conservation both in situ and ex situ, and 6) validating methodologies and strategies for conservation education. Since 2005, five species-directed projects have been developed and include work in five of the eight provinces in the Maned Wolf’s distribution (Orozco et al. 2013b). Extensive surveys of farmers and ranchers have provided valuable information about the distribution of the species and also about people's attitudes towards Maned Wolves (Songsasen and Rodden 2010). Ongoing education programs are aimed at changing negative perceptions of this wild carnivore (Soler 2008, Orozco et al. 2013b).
Actions de conservation (2)Conservation Actions Classification Scheme — IUCNExpert
2_1Site/area management5_4_2National level
Stress écologiques (9)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality2_1Species mortality2_1Species mortality2_1Species mortality2_3_7Reduced reproductive success
Usage & commerce (1)Use & Trade — IUCNExpert
3Medicine - human & veterinarysubsistance
Priorités de recherche (4)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology1_5Threats3_1Population trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Systèmes (terrestre/eau douce/marin)
Références bibliographiques (30)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2016. The IUCN Red List of Threatened Species. Version 2016-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 30 June 2016).
- Lacy, R.C., P.S. Miller, and K. Traylor-Holzer. 2015. <i> Vortex 10 User’s Manual. 15 April 2015 update</i>. IUCN SSC Conservation Breeding Specialist Group, and Chicago Zoological Society, Apple Valley, Minnesota, USA.
- IUCN. 2015. The IUCN Red List of Threatened Species. Version 2015-4. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 19 November 2015).
- Cartes, J.L., Giordano, A.J. and Cameroni, M.N.M. 2014 . Chapter 17: The maned wolf (<i>Chrysocyon brachyurus</i>) in Paraguay. In: Consorte-McCrea, A.G. and Santos, E.F. (eds), <i>Ecology and Conservation of the Maned Wolf – Multidisciplinary Perspectives</i>, pp. 235-247. CRC press, Florida, USA.
- Rodrigues, F.H.G., Desbiez, A.L.J., Grando, R.L.S.C., Lacerda, A.C.R., Hass, A. and Silva, W.R. 2014. Chapter 2: Population Viability Analysis. In: A. Consorte-McCrea and E. Ferraz (eds), <i>Ecology and Conservation of the Maned Wolf: Multidisciplinary Perspectives </i>, CRC Press, Florida, USA.
- Holland, R. 2014. Chapter 4: The maned wolf Ex-Situ worldwide. In: Consorte-McCrea, A.G. and Santos, E.F. (eds), <i>Ecology and Conservation of the Maned Wolf – Multidisciplinary Perspectives</i>, pp. 53-62. CRC press, Florida, USA.
- May Jr., J.A. and Felippe, P.A.N. 2014. 2014. Chapter 9: Conservation Medicine. In: Consorte-McCrea, A.G. and Santos, E.F. (eds), <i> Ecology and Conservation of the Maned Wolf – Multidisciplinary Perspectives</i>, pp. 109-127. CRC press, Florida, USA.
- Emmons, L.H. 2014. Chapter 16: Environmental Influences on Maned Wolf in Bolivia. In: Consorte-McCrea, A.G. and Santos, E.F (eds), <i>Ecology and Conservation of the Maned Wolf – Multidisciplinary Perspectives</i>, pp. 221-234. CRC press, Florida, USA.
- Motta-Júnior, J.C., Queirolo, D. and Bueno, A.B. 2014. Chapter 7: Feeding Ecology – A Review. In: A.G. Consorte-McCrea and E.F. Santos (eds), <i>Ecology and Conservation of the Maned Wolf – Multidisciplinary Perspectives</i>, pp. 87-98. CRC press, Florida, USA.
- Paula, R.C., Rodrigues, F.H.G., Bizerril, M.X., Songsasen, N., Eizirik, E., Morato, R.G., Santos, J.P., Azevedo, F.C., May Junior, J.A., Soares, C.C., Rocha, F.L. and Arrais, R.C. 2014. Chapter 13: The Maned Wolf Conservation Project – Serra da Canastra, Minas Gerais, Brazil. In: Consorte-McCrea, A.; Ferraz, E. (ed.), <i>), Ecology and Conservation of the Maned Wolf: Multidisciplinary Perspectives</i>, CRC Press., Florida, USA.
- Paula, R.C. and Desbiez, A. 2014. Chapter 2: Population Viability Analysis. In: Consorte-McCrea, A.; Ferraz, E. (ed.), <i>Ecology and Conservation of the Maned Wolf: Multidisciplinary Perspectives</i>, CRC Press, Florida, USA.
- Vynne, C. 2014. Chapter 12: Agricultural expansion and the future of the Maned Wolf. In: Consorte-McCrea, A.G. and Santos, E.F. (eds), <i>Ecology and Conservation of the Maned Wolf – Multidisciplinary Perspectives</i>, pp. 165-176. CRC press, Florida, USA.
- Soler, L. 2014. Chapter 15: Maned Wolf in Argentina. In: Consorte-McCrea, A.G. and Santos, E.F. (eds), <i>Ecology and Conservation of the Maned Wolf – Multidisciplinary Perspectives</i>, pp. 203-220. CRC press, Florida, USA.
- Orozco, M.M., Soler, GL. and González Paula, P. 2013b. El aguará guazú en Argentina: acciones para la conservación de la especie y su hábitat. Grupo Argentino Aguará Guazú (GAAG).
- Orozco M. , Ceballos L.A., Pino M. de la C. and Gurtler, R.E. 2013a. Local threats and potential infectious hazards to maned wolves (<i>Chrysocyon brachyurus</i>) in the southeastern Argentine Chaco. <i> Mammalia</i> 78: 339-349.
- Paula, R.C. and Gambarini, A. 2013. <i>Historias de Um Lobo – Stories of a Golden Wolf</i>. Avis Brasilis, Vinhedo.
- Paula, R.C., Rodrigues, F.H.G., Queirolo, D., Jorge, R.P.S., Lemos, F.G. and de Almeida Rodrigues, L. 2013. Avaliação do estado de conservação do Lobo-guará <i>Chrysocyon brachyurus</i> (Illiger, 1815) no Brasil. <i>Biodiversidade Brasileira</i> 3: 146-159.
- Deem, S.L., Bronson, E., Angulo, S., Acosta, V., Murray, S., Robbins, R.G., Giger, U., Rothschile, B., and Emmons, L.H. 2012. Morbidity and Mortality . <i>Smithsonian Contribution Zoology </i> 639: 77-89.
- Muir, M.J. and Emmons, L.H. 2012. Conservation. In: Emmons, L.H. (ed.), <i>The Maned Wolf of Noel Kempff Mercado National Park</i>, pp. 91-116. Smihsonian Institution Press, Washington, DC.
- Emmons, L.H. 2012. The Maned Wolves of Noel Kempff Mercado National Park. <i>Smithsonian Contributions to Zoology</i> 639 : 1-135.
- Ojeda, R.A Chillo, V. and Díaz, G.B. 2012. <i>Libro rojo mamíferos amenazados de la Argentina. Sociedad Argentina para el Estudio de los Mamíferos (SAREM)</i>.
- Williams, R.S.R., Torres, E., Magan, J., Cruz, A. and Leite Pitman, R. 2012. Continued presence of the Maned Wolf in Peru. Available at: <a href="http://www.canids.org/canidsnews/15/Maned_wolf_in_Peru.pdf">http://www.canids.org/canidsnews/15/Maned_wolf_in_Peru.pdf</a>.
- Queirolo, D., Moreira, J.R., Soler, L, Emmons, L.H., Rodrigues, F.H.G., Pautasso, A.A., Cartes, J.L. and Salvatori, V. 2011. Historical and current range of the Near Threatened Maned Wolf <i>Chrysocyon brachyurus</i> in South America. <i>Oryx </i> 45: 296-303.
- Vynne, C. Keim, J.L., Machado, R.B., Marinho-Filho, J. Silveira, L., Groom, M.J. and Wasser, S.K. 2011. Resource selection and its implications for wide-ranging mammals of the Brazilian Cerrado. <i>PLoS ONE </i> 6(12): e28939.
- Vynne, C. 2010. Landscape use by wide-ranging mammals of the cerrado. Department of Biology, University of Washington.
- Songsasen, N. and Rodden, M.D. 2010. The role of the Species Survival Plan in Maned Wolf <i>Chrysocyon brachyurus</i> conservation. <i>International Zoo Yearbook </i> 44: 136-148.
- Soler, L. 2009. Aspectos ecológicos y perspectivas de conservación de Chrysocyon brachyurus en Argentina. MSc. Dissertation, Universidad Nacional del Sur.
- Orozco, M., Pautasso, A.A. and Rago, V. 2009. <i>Aguara guazú (</i>Chrysocyon brachyurus<i>) en Argentina. Situación actual y acciones de conservación. [Maned Wolf (Chrysocyon brachyurus) in Argentina. Current status and conservation actions.] </i>. Dirección de Fauna Silvestre Secretaria de Ambiente y Desarrollo Sustentable, Argentina.
- Pautasso, A.A (ed). 2009. Estado de conocimiento y conservación del aguará guazú (<i>Chrysocyon brachyurus</i>) en la provincia de Santa Fe, Argentina. <i>Biológica</i> 11: 1-125.
- Azevedo, F.C. 2008. Área de vida e organização espacial de lobos-guará (<i>Chrysocyon brachyurus</i>) na região do Parque Nacional da Serra da Canastra, Minas Gerais, Brasil. Dissertação de Mestrado, Universidade Federal de Minas Gerais, Belo Horizonte.
Évaluateurs & contributeurs (4)Personnes ayant contribué à l'évaluation IUCNExpert
Paula, R.C. & DeMatteo, K. 2015. Chrysocyon brachyurus (errata version published in 2016). The IUCN Red List of Threatened Species 2015: e.T4819A88135664. Accessed on 05 May 2026.
Traits biologiques
Morphologie(4)
Cycle de vie(1)
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Reproduction(6)
Écologie & habitat(9)
Sources priorisées par qualité scientifique (peer-reviewed spécialisées → Wikidata fallback). Unités auto-converties, valeur max retenue en cas de mesures multiples. Méthodologie · Citations.
Distribution mondiale
Phénologie
Consulter sur les bases externes
Observations & statuts
Cartographie
Note nomenclaturale & synonymesDétails taxonomiques + synonymes CoLExpert
Note nomenclaturale
TAXREF v18 — INPN/MNHNSynonymes (7)— redirigent vers cette page
- Canis brachyurusIlliger, 1815
- Canis branhyurusIlliger, 1815
- Canis campestrisWied-Neuwied, 1826
- Canis isodactylusAmeghino, 1906
- Canis jubatusDesmarest, 1820
- Canis vulpesLarranaga, 1923
- Vulpes caricrosaOken, 1816
Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).