Habitat and Distribution of the Ruffed Lemur,<i>Varecia</i>, North of the Bay of Antongil in Northeastern Madagascar

Hekkala, Evon R.; Rakotondratsima, Marius; Vasey, Natalie

doi:10.1896/052.022.0107

Cited by 6 publications

(14 citation statements)

References 12 publications

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“…Red ruffed lemur populations have been drastically reduced (Tattersall 1977;Petter et al 1977;Hekkala et al 2007;Goodman and Ganzhorn 2004). Substantial populations are found only on the Masoala Peninsula (CBSG 2002;Vasey 2003).…”

Section: Discussionmentioning

confidence: 99%

“…The majority of red ruffed lemur populations is found on the Masoala Peninsula [Conservation Breeding Specialist Group (CBSG) 2002; Vasey and Tattersall 2002]. Sparse remnants occur in the region north of Antongil Bay where MasNP and MakNP are loosely connected by forest fragments (Hekkala et al 2007). These northern populations have been drastically reduced within a geographic range that stretches into forests south of Andapa (Tattersall 1977;Petter et al 1977;Hekkala et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Sparse remnants occur in the region north of Antongil Bay where MasNP and MakNP are loosely connected by forest fragments (Hekkala et al 2007). These northern populations have been drastically reduced within a geographic range that stretches into forests south of Andapa (Tattersall 1977;Petter et al 1977;Hekkala et al 2007). The northern distribution limit of the species is considered to be the Lokoho River (Goodman and Ganzhorn 2004), and the western limit is the Antainambalana River (Hekkala et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The northern distribution limit of the species is considered to be the Lokoho River (Goodman and Ganzhorn 2004), and the western limit is the Antainambalana River (Hekkala et al 2007). The historic range of V. rubra at one time was in contact with V. variegata north of Antongil Bay (Vasey and Tattersall 2002), possibly resulting in a hybrid zone, but this cannot be confirmed, as the zone is now heavily degraded and primarily contains remnant, isolated ruffed lemur populations (Simons and Lindsay 1987;Hekkala et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…However, this forest was one of three localities in the northwestern part of the park where a reforestation project began more than a decade ago (Holloway 2000). This effort augmented the DAMA forest to form a narrow corridor approximately 1-km wide, designed to connect the MakNP to the northwestern corner of the MasNP (Hekkala et al 2007). …”

Section: Introductionmentioning

confidence: 99%

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Genetic architecture of two red ruffed lemur (Varecia rubra) populations of Masoala National Park

Razakamaharavo

McGuire²,

Vasey

et al. 2009

Primates

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The current range of the red ruffed lemur (Varecia rubra) population is primarily restricted to forests of the Masoala Peninsula on the northeastern coast of Madagascar. Whereas much of the peninsula is protected as Masoala National Park, parts of the forest are at risk from anthropogenic pressures and habitat fragmentation. We sampled 32 individual red ruffed lemur from two sites: Ambatoledama (DAMA), a narrow forest corridor across an area of degraded habitat connecting larger blocks of forest in the northwestern reaches of the park, and Masiaposa (MAS) forest, a largely pristine forest on the lower western side of the peninsula. Population genetic parameters were estimated for these two populations employing 15 microsatellite loci derived from the V. variegata genome. We found that by exceeding the expected heterozygosity at mutation-drift equilibrium, the DAMA population has undergone a recent population bottleneck. Population structure analysis detected individuals harboring genotypic admixture of the DAMA genetic cluster in the MAS population, suggesting a possibility of unilateral gene flow or movement between these populations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Genetic architecture of two red ruffed lemur (Varecia rubra) populations of Masoala National Park

Razakamaharavo

McGuire²,

Vasey

et al. 2009

Primates

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Do functional traits offset the effects of fragmentation? The case of large‐bodied diurnal lemur species

Eppley

Santini

Tinsman

et al. 2020

American J Primatol

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Primates worldwide are faced with increasing threats making them more vulnerable to extinction. Anthropogenic disturbances, such as habitat degradation and fragmentation, are among the main concerns, and in Madagascar, these issues have become widespread. As this situation continues to worsen, we sought to understand how fragmentation affects primate distribution throughout the island. Further, because species may exhibit different sensitivity to fragmentation, we also aimed to estimate the role of functional traits in mitigating their response. We collated data from 32 large-bodied lemur species ranges, consisting of species from the families Lemuridae (five genera) and Indriidae (two genera). We fitted Generalized Linear Models to determine the role of habitat fragmentation characteristics, for example, forest cover, patch size, edge density, and landscape configuration, as well as the protected area (PA) network, on the species relative probability of presence. We then assessed how the influence of functional traits (dietary guild, home range size) mitigate the response of species to these habitat metrics. Habitat area had a strong positive effect for many species, and there were significantly negative effects of fragmentation on the distribution of many lemur species. In addition, there was a positive influence of PAs on many lemur species' distribution. Functional trait classifications showed that lemurs of all dietary guilds are negatively affected by fragmentation; however, folivore-frugivores show greater flexibility/variability in terms of habitat area and landscape complexity compared to nearly exclusive folivores and frugivores. Furthermore, species of all home range sizes showed a negative response to fragmentation, while habitat area had an increasingly positive effect as home range increased in size. Overall, the general trends for the majority of lemur species are dire and point to the need for immediate actions on a multitude of fronts, most importantly landscape-level reforestation efforts.

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The Colobines

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Habitat and Distribution of the Ruffed Lemur,Varecia, North of the Bay of Antongil in Northeastern Madagascar

Cited by 6 publications

References 12 publications

Genetic architecture of two red ruffed lemur (Varecia rubra) populations of Masoala National Park

Genetic architecture of two red ruffed lemur (Varecia rubra) populations of Masoala National Park

Do functional traits offset the effects of fragmentation? The case of large‐bodied diurnal lemur species

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