Salanoia concolor 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Carnivora Eupleridae

Scientific Name: Salanoia concolor (I. Geoffroy Saint-Hilaire, 1837)
Common Name(s):
English Brown-tailed Vontsira, Brown-tailed Mongoose, Malagasy Brown-tailed Mongoose
Galidia concolor I. Geoffroy Saint-Hilaire, 1837
Salanoia unicolor (I. Geoffroy Saint-Hilaire, 1837)
Salanoia durrelli Durbin, Funk, Hawkins, Hills, Jenkins, Moncrieff & Ralainasolo, 2010
Salanoia olivacea (I. Geoffroy Saint-Hilaire, 1839)
Taxonomic Notes: Durbin et al. (2010) named Salanoia durrelli based on one specimen, although other individuals were observed but not taken. The morphological differences are minor and the name is here considered a synonym pending examination of further material. The population to which it refers is ecologically anomalous, occurring in marshland not the forest used by all other populations, and is highly threatened; clarifying its taxonomic status is therefore of urgent conservation importance.

Assessment Information [top]

Red List Category & Criteria: Vulnerable A3cde+4cde ver 3.1
Year Published: 2016
Date Assessed: 2015-03-02
Assessor(s): Hawkins, F.
Reviewer(s): Duckworth, J.W.
Contributor(s): Golden, C., Farris, Z.J., Jenkins, R.K.B. & Jones, J.P.G.
Brown-tailed Vontsira is listed as Vulnerable because it is a rare species limited to highly threatened lowland forest and marshland habitats: it is likely that over the course of the next 10 years (taken as slightly over three generations), the population will drop by more than 30% (and possibly much more) mainly because of widespread habitat loss and degradation, hunting, persecution, and the effects of introduced carnivores. The breakdown of governance since the coup d'etat in 2009 has led to increased artisanal mining in forest areas, increased hunting, and increased opportunistic rosewood cutting throughout the species's range, especially in its core lowland forest habitat. This is so even in the protected areas such as Masoala National Park, one of the few sites where the species has been recorded recently. The extreme rarity of records of this species in its forest habitat is hard to explain and certainly does not reflect simply low levels of relevant survey effort. It is therefore possible that it is declining at rates sufficient for Endangered but this is masked by the poor quality of the information. This species is a priority for Red List review as soon as further information be generated.
Previously published Red List assessments:

Geographic Range [top]

Range Description:The little-known Brown-tailed Vontsira is endemic to the rainforest of north-eastern Madagascar. There are recent (1995-2014) records only from Masoala National Park, Makira Natural Park, Betampona Strict Nature Reserve, Mananara Nord, and Zahamena Strict Reserve (Hawkins 2012a) and from Lake Alaotra. The latter site's population has been proposed as a new species, Durrell’s Vontsira Salanoia durrelli Durbin et al., 2010; its entire range is smaller than 100 km². The known records in rainforest range in elevation from 200 to 680 m. Despite substantial trapping efforts since the 1990s in eastern rainforest above 680 m, the species has not been recorded in any such sites (S.M. Goodman pers. comm. 2006), but Lake Alaotra lies at 750 m asl.
Countries occurrence:
Additional data:
Continuing decline in area of occupancy (AOO):Yes
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Yes
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):200
Upper elevation limit (metres):750
Range Map:Click here to open the map viewer and explore range.

Population [top]


Brown-tailed Vontsira is rarely seen, even in the sites with most records, Masoala (Hawkins 2012a) and Betampona (Britt and Virkaitis 2003).

Brown-tailed Vontsira had the lowest probability of occupancy (defined as the probability that a site/forest is occupied by the species of interest while taking into account the variation in detectability of the species across the various sites), of 0.25 ± SE 0.09, for any native carnivore across the Makira  landscape (Farris et al. in review a, Z. Farris pers. comm. 2014). It was not detected in forest fragments over 5 km from contiguous forest. Photographic surveys over a six-year period (2008-2013) and resulting multi-season occupancy analyses at one forest site showed its occupancy decreased from 0.87 (2008) to 0.16 (2013) (trap success [number of captures divided by trap nights multiplied by 100] decreased from 0.99 in 2008 to 0.67 in 2013) which resulted in an extremely high site-specific probability of local extirpation of 0.49 (0.13). No Brown-tailed Vontsira was camera-trapped at additional survey sites. Indeed, across the landscape it was found at only two survey sites. These findings combined with the species's overall rarity warrant conservation attention (Z. Farris pers. comm. 2014).

The population at Lake Alaotra has a very small population, at most a few hundred individuals (Durbin et al. 2010). 

Current Population Trend:Decreasing
Additional data:
Continuing decline of mature individuals:Yes
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Yes
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:Brown-tailed Vontsira is a diurnal species recorded only from lowland tropical humid forest (Hawkins 2012a) except for one marsh (Durbin et al 2010). In Makira, Brown-tailed Vontsira was camera-trapped in both degraded and non-degraded forest sites. It was recorded at a maximum elevation of 680 m and it did not occur at sites having high activity of feral/domestic dogs, feral/domestic cats or Ring-tailed Vontsira Galidia elegans (Farris and Kelly 2011, Farris et al. 2012, Farris et al. in review a).

Brown-tailed Vontsira was camera-trapped primarily as duos; singles were very rare. It is almost exclusively diurnal with peak activity in early morning, whereas Ring-tailed Vontsira activity peaks at mid-day (Farris et al. in review b). 

The animals rest in burrows or hollow trees during the night. The gestation period is about three months and there is a single young (Albignac 1973).
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):3.2
Movement patterns:Not a Migrant

Use and Trade [top]

Use and Trade: For information on use and trade, see under Threats.

Threats [top]

Major Threat(s): Brown-tailed Vontsira is threatened by hunting, introduced carnivores, deforestation through conversion to cultivated land, and forest degradation through selective logging and charcoal production; the lake population faces additional threats.

Lowland forest below 500 m is one of the most threatened habitats in Madagascar. Deforestation and forest disturbance has increased significantly since 2009. R. Rajaonson (pers. comm. 2014) estimated that deforestation in eastern forest increased from 0.5% per annum in 2005-2010 to 0.94% per annum in 2010-2013. Allnut et al. (2009) estimated that in Masoala National Park, annual rates of deforestation in the studied area increased to 1.27% per annum in 2011. High levels of illegal settlement in protected areas, especially around the Bay of Antongil, are linked to artisanal mining (for quartz) and logging of rosewood; hunting for food using dogs has increased greatly in these areas as a result. Some villages have seen increases in populations of between 200 and 300% (C. Golden pers. comm. 2014).

In the Makira region there are no data on consumption rates of this carnivore, which is likely to reflect its overall rarity (Farris et al. in review a). In Betampona Strict Nature Reserve, Golden et al. (in press) reported six Brown-tailed Vontsiras hunted in one year, potentially a large proportion of the population of this very small site (2,228 ha).

Household interviews conducted by Madagasikara Voakajy (pers. comm. 2014) in the Moramanga region of eastern Madagascar in 2008-2009 did not identify Brown-tailed Vontsira as a hunted animal, which again might simply reflect its overall rarity.

Brown-tailed Vontsira had very strong temporal activity overlap with dogs and moderate overlap with feral/wild cats, revealing the potential for increased interactions and competition. These potential interactions and competition perhaps contribute to the absence of Brown-tailed Vontsira at sites where dog activity is high (Farris et al. in review b).

The Lac Alaotra subpopulation is very small and is confined to a very small area. It is threatened by killing as a pest, hunting, and the burning of its reed-bed habitat.

Conservation Actions [top]

Conservation Actions: Brown-tailed Vontsira was recorded during 1995-2014 in several protected areas: Masoala National Park, Zahamena National Park, Makira Natural Park, and Betampona Strict Nature Reserve (Hawkins 2012a). Additional survey is needed to determine the current status of the populations of this species across its range, its basic natural history, and the types and magnitudes of the threats it faces. Given the small size of the Lac Alaotra population and the high level of threats it faces, clarification of its taxonomic status is urgent; although even if conspecific it warrants conservation attention as an ecologically anomalous population of a threatened species, if it is specifically distinct it is one of the most threatened carnivores in the world.

Citation: Hawkins, F. 2016. Salanoia concolor. The IUCN Red List of Threatened Species 2016: e.T19852A45202205. . Downloaded on 23 September 2017.
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