|Scientific Name:||Fossa fossana (P.L.S. Müller, 1776)|
Viverra fossa Schreber, 1777
|Red List Category & Criteria:||Vulnerable A3cde+4cde ver 3.1|
|Contributor(s):||Golden, C., Farris, Z.J., Jenkins, R.K.B. & Jones, J.P.G.|
Spotted Fanaloka is listed as Vulnerable because it is likely that over the course of the next three generations (taken as 22 years), the population will drop by more than 30% (and possibly much more) mainly because of widespread habitat loss, hunting, persecution, and the effects of introduced carnivores. The rates of habitat loss and hunting have recently increased significantly because of breakdown of governance since the coup d'etat in 2009, leading to increased artisanal mining in forest areas, increased hunting, and increased opportunistic rosewood cutting throughout the species' range.
|Previously published Red List assessments:|
|Range Description:||Spotted Fanaloka is endemic to the eastern forests of Madagascar and the Sambirano region in the island's north-west (Kerridge et al. 2003). It is present as far north as Montagne d'Ambre National Park and as far south as Andohahela National Park in the south-east. Strongholds include the Masoala Peninsula, rainforests at Mananara, Ambatovaky and Zahamena, and the Andohahela forest region. The altitudinal range is sea level to at least 1,600 m, but the species seems to be much scarcer above 1,000 m (Goodman 2012).|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Kerridge et al. (2003) trapped 22 individuals in two weeks in a 2 km² area near Vevembe, indicating that the density of the species can be high in favoured habitat. Around Ranomafana National Park, Gerber et al. (2012) found that Spotted Fanaloka occurred at lower density (1.38 ± SE 0.22 individuals per km²) in logged forest than in unlogged (3.19 ± SE 0.55) and it was absent from forest fragments over 2.5 km from intact forest.|
In north-east Madagascar, camera-trap surveys (Farris et al. in review a, Z. Farris pers. comm. 2014) revealed a high probability of occupancy of 0.70 (SE ± 0.07) across the Masoala-Makira landscape, the highest of any native carnivore. However, Spotted Fanaloka 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) was significantly higher in non-degraded forest (0.73 ± SE 0.08) than in degraded forest (0.50 ± SE 0.08). Spotted Fanaloka was not detected in forest fragments 5 km or more from contiguous forests (Farris and Kelly 2011, Farris et al. in review a). Spotted Fanaloka is constrained by the presence of both exotic feral/wild cats (Felis spp.) and exotic Small Indian Civets (Viverricula indica) (Gerber et al. 2012, Farris et al. in review a). Photographic surveys over a six-year period (2008-2013) and resulting multi-season occupancy analyses at one contiguous forest site showed that Spotted Fanaloka occupancy decreased from 1.0 (2008) to 0.80 (2013) (trap success decreased from 14.0 in 2008 to 3.59 in 2013) which resulted in a moderate probability of local extirpation of 0.14 (0.05), while at another survey site trap success changed only from 5.04 in 2011 to 4.46 in 2013 (Z. Farris pers. comm. 2014).
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||This nocturnal and terrestrial species is found in humid tropical lowland, mid-altitude and littoral forests, and is sometimes associated with streams or marshy areas in these habitats; it seems not to adapt to secondary habitats (Kerridge et al. 2003).|
There is a lower probability of occupancy and significantly lower encounter rate in degraded forest sites than in intact ones. Further, there is a negative association with proximity to villages (Farris and Kelly 2011, Farris et al. 2012, Farris et al. in review a).
Spotted Fanaloka is almost exclusively solitary; however, an adult and juvenile were photographed travelling together in March. Camera-trapping revealed Spotted Fanaloka to be nocturnal, with a few records of daylight activity. Spotted Fanaloka shifts peak activity from cool season to hot season, but this might have resulted from increased human and dog activity (Farris et al. in review b).
During the daytime, animals shelter in hollow trees, under fallen logs, or amongst rocks. The gestation period is around 82-89 days (Albignac 1973). Young are born well developed, and sexual maturity is attained at about two years of age.
|Continuing decline in area, extent and/or quality of habitat:||Yes|
|Generation Length (years):||7.6|
|Use and Trade:||The species is known to be hunted for food (see Threats section for more information).|
Being rather constrained to primary forest and absent from forest fragments (Gerber et al. 2012), Spotted Fanaloka is threatened by deforestation for cultivated land, and by forest degradation through selective logging and charcoal production. It is also threatened by hunting; its taste is the most preferred among the native carnivores (Golden 2005). Introduced species including dogs, cats, and the Small Indian Civet (Viverricula indica) are competitors, and dogs are also likely to be predators.
Deforestation and forest disturbance across the range of Spotted Fanaloka has increased significantly since 2009. R. Rajaonson (pers. comm. 2014) estimates 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 study 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).
Household interviews conducted by Madagasikara Voakajy (pers. comm. 2014) in the Moramanga region of eastern Madagascar in 2008-2009 suggested that 513 (31%) of 1,635 respondents interviewed in 129 villages had eaten Spotted Fanaloka in the preceding year. This is the highest rate among all the local endemic carnivores. By contrast, in Makira, hunting, including for food, appears to be less of a concern for Spotted Fanaloka than for other carnivores across the Makira landscape. Only 11 were reportedly consumed in household surveys within four villages (143 households were surveyed) from 2005 to 2011 near the Makira Natural Park. However, hunting rates were still positively associated with Spotted Fanaloka occupancy, demonstrating increased efforts in non-degraded forest where its abundance/activity is highest (Farris et al. in review a).
Spotted Fanaloka appears to alter its temporal activity when human and dog activity are very high. It has strong temporal overlap with Small Indian Civet, revealing the potential for increased interactions and competition (Farris et al. in review b).
Single-season landscape occupancy analyses showed that Spotted Fanaloka probability of occupancy decreases dramatically when feral cat and Small Indian Civet were present (Farris et al. in review a).
|Conservation Actions:||Spotted Fanaloka is listed on Appendix II of CITES. It inhabits a number of protected areas, including Montagne d’Ambre, Masoala, Marojejy, Zahamena, Ranomafana and Andohahela National Parks, and Ankarana Special Reserve.|
|Citation:||Hawkins, F. 2015. Fossa fossana. The IUCN Red List of Threatened Species 2015: e.T8668A45197868.Downloaded on 17 December 2017.|
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