Nesting biology and food habits of the Peregrine Falcon <i>Falco peregrinus radama</i> in the south-west and central plateau of Madagascar

Razafimanjato, Gilbert; Roland, Lily-Arison René de; Rabearivony, Jeanneney; Thorstrom, Russell

doi:10.2989/ostrich.2007.78.1.2.46

Cited by 6 publications

(14 citation statements)

References 6 publications

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“…Tsimanampetsotsa National Park (TNP) (24°06′S 43°50′E), a site located approximately 135 km southwest of Beza Mahafaly (Cuozzo et al,2008), is a 48,000 hectare reserve located in southwestern Madagascar, 15km east of the Mozambique Channel. The vast limestone plateau of TNP is populated by dense, spiny, succulent, xerophilic vegetation (Razafimanjato et al,2007). This park contains primarily intact habitat, with few anthropogenic effects or invasive plant foods (Hammer and Ramilijaona,2009; Youssouf, Sauther and Cuozzo, unpublished data).…”

Section: Methodsmentioning

confidence: 99%

Evaluating ring‐tailed lemurs (Lemur catta) from southwestern Madagascar for a genetic population bottleneck

Parga

Sauther

Cuozzo

et al. 2011

American J Phys Anthropol

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In light of historical and recent anthropogenic influences on Malagasy primate populations, in this study ring-tailed lemur (Lemur catta) samples from two sites in southwestern Madagascar, Beza Mahafaly Special Reserve (BMSR) and Tsimanampetsotsa National Park (TNP), were evaluated for the genetic signature of a population bottleneck. A total of 45 individuals (20 from BMSR and 25 from TNP) were genotyped at seven microsatellite loci. Three methods were used to evaluate these populations for evidence of a historical bottleneck: M-ratio, mode-shift, and heterozygosity excess tests. Three mutation models were used for heterozygosity excess tests: the stepwise mutation model (SMM), two-phase model (TPM), and infinite allele model (IAM). M-ratio estimations indicated a potential bottleneck in both populations under some conditions. Although mode-shift tests did not strongly indicate a population bottleneck in the recent historical past when samples from all individuals were included, a female-only analysis indicated a potential bottleneck in TNP. Heterozygosity excess was indicated under two of the three mutation models (IAM and TPM), with TNP showing stronger evidence of heterozygosity excess than BMSR. Taken together, these results suggest that a bottleneck may have occurred among L. catta in southwestern Madagascar in the recent past. Given knowledge of how current major stochastic climatic events and human-induced change can negatively impact extant lemur populations, it is reasonable that comparable events in the historical past could have caused a population bottleneck. This evaluation additionally functions to highlight the continuing environmental and anthropogenic challenges faced by lemurs in southwestern Madagascar.

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Section: Methodsmentioning

confidence: 99%

Evaluating ring‐tailed lemurs (Lemur catta) from southwestern Madagascar for a genetic population bottleneck

Parga

Sauther

Cuozzo

et al. 2011

American J Phys Anthropol

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“…Currently, between 18-20 geographical sub-species are recognised (White et al 2013), with the distribution of many Northern Hemisphere Peregrine sub-species in Europe and North America well documented. The Madagascar Peregrine Falcon (F. p. radama; hereafter 'Madagascar Peregrine') is one of the least known Peregrine sub-species in terms of biology and distribution (White et al 2013; but see Razafimanjato et al 2007). This sub-species is an uncommon resident with a patchy distribution across Madagascar, Mayotte, and the Comoros Islands (Langrand 1990;Goodman et al 1997;Razafimanjato et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The Madagascar Peregrine Falcon (F. p. radama; hereafter 'Madagascar Peregrine') is one of the least known Peregrine sub-species in terms of biology and distribution (White et al 2013; but see Razafimanjato et al 2007). This sub-species is an uncommon resident with a patchy distribution across Madagascar, Mayotte, and the Comoros Islands (Langrand 1990;Goodman et al 1997;Razafimanjato et al 2007). Nearly all the current literature on the Madagascar Peregrine states the scarcity of this sub-species and the logistical difficulties in locating individuals or breeding pairs (reviewed in White et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…The Madagascar Peregrine Falcon ( F. p. radama ; hereafter ‘Madagascar Peregrine’) is one of the least known Peregrine sub-species in terms of biology and distribution (White et al . 2013; but see Razafimanjato et al . 2007).…”

Section: Introductionmentioning

confidence: 99%

“…This sub-species is an uncommon resident with a patchy distribution across Madagascar, Mayotte, and the Comoros Islands (Langrand 1990; Goodman et al . 1997; Razafimanjato et al . 2007).…”

Section: Introductionmentioning

confidence: 99%

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Distribution and habitat use of the Madagascar Peregrine Falcon: first estimates for area of habitat and population size

Sutton

Roland²,

Thorstrom

et al. 2021

Preprint

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Accurately demarcating species distributions has long been at the core of ecology. Yet our understanding of the factors limiting species range limits is incomplete, especially for tropical species in the Global South. Human-driven threats to the survival of many taxa are increasing, particularly habitat loss and climate change. Identifying distributional range limits of at-risk and data-limited species using Species Distribution Models (SDMs) can thus inform spatial conservation planning to mitigate these threats. The Madagascar Peregrine Falcon (Falco peregrinus radama) is the resident sub-species of the Peregrine Falcon complex distributed across Madagascar, Mayotte, and the Comoros Islands. Currently, there are significant knowledge gaps regarding its distribution, habitat preferences and population size. Here, we use point process regression models and ordination to identify Madagascar Peregrine Falcon environmental range limits and propose a population size estimate based on inferred habitat. From our models, the core range of the Madagascar Peregrine Falcon extends across the central upland plateau of Madagascar with a patchier range across coastal and low-elevation areas. Range-wide habitat use indicated that the Madagascar Peregrine Falcon prefers areas of high elevation and aridity, coupled with high vegetation heterogeneity and > 95 % herbaceous landcover, but generally avoids areas of > 30 % cultivated land and > 10 % mosaic forest. Based on inferred high-class habitat, we estimate this habitat area could potentially support a population size ranging between 150-300 pairs. Following International Union for Conservation of Nature Red List guidelines, we recommend this sub-species be classed as Vulnerable, due to its small population size. Despite its potentially large range, the Madagascar Peregrine has specialized habitat requirements and would benefit from targeted conservation measures based on spatial models in order to maintain viable populations.

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Distribution and habitat use of the Madagascar Peregrine Falcon: first estimates for area of habitat and population size

Sutton

Roland²,

Thorstrom

et al. 2022

Bird Conservation International

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Summary Accurately demarcating distributions of biological taxa has long been at the core of ecology. Yet our understanding of the factors defining species range limits is incomplete, especially for tropical species in the Global South. Human-driven threats to the survival of many taxa are increasing, particularly habitat loss and climate change. Identifying distributional range limits of at-risk and data-limited species using Species Distribution Models (SDMs) can thus inform spatial conservation planning to mitigate these threats. The Madagascar Peregrine Falcon Falco peregrinus radama is the resident sub-species of the Peregrine Falcon complex distributed across Madagascar, Mayotte, and the Comoros Islands. There are currently significant knowledge gaps regarding its distribution, habitat preferences, and population size. Here, we use penalized logistic regression and environmental ordination to identify Madagascar Peregrine Falcon habitat in both geographic and environmental space and propose a population size estimate based on inferred habitat. From the penalized logistic regression model, the core habitat area of the Madagascar Peregrine Falcon extends across the central and northern upland plateau of Madagascar with patchier habitat across coastal and low-elevation areas. Range-wide habitat use in both geographic and environmental space indicated positive associations with high elevation and aridity, coupled with high vegetation heterogeneity and >95% herbaceous landcover, but general avoidance of areas >30% cultivated land and >10% mosaic forest. Based on inferred high-class habitat from the penalized logistic regression model, we estimate this habitat area could potentially support a population size ranging between 150 and 300 pairs. Following IUCN Red List guidelines, this subspecies would be classed as ‘Vulnerable’ due to its small population size. Despite its potentially large range, the Madagascar Peregrine Falcon has specialised habitat requirements and would benefit from targeted conservation measures based on spatial models to maintain viable populations.

show abstract

Nesting biology and food habits of the Peregrine Falcon Falco peregrinus radama in the south-west and central plateau of Madagascar

Cited by 6 publications

References 6 publications

Evaluating ring‐tailed lemurs (Lemur catta) from southwestern Madagascar for a genetic population bottleneck

Evaluating ring‐tailed lemurs (Lemur catta) from southwestern Madagascar for a genetic population bottleneck

Distribution and habitat use of the Madagascar Peregrine Falcon: first estimates for area of habitat and population size

Distribution and habitat use of the Madagascar Peregrine Falcon: first estimates for area of habitat and population size

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