Habitat Use and Diet of Astrochelys radiata in the Subarid Zone of Southern Madagascar

@inproceedings{Rasoma2013HabitatUA,
  title={Habitat Use and Diet of Astrochelys radiata in the Subarid Zone of Southern Madagascar},
  author={R. V. Rasoma and A. Raselimanana and Yedidya R. Ratovonamana and J. Ganzhorn},
  year={2013}
}
Abstract Astrochelys radiata is one of the threatened tortoise species of Madagascar. We studied their home range size, use of shelters, and diet in Tsimanampetsotsa National Park. The goal was to identify suitable habitats and food chemistry. These data could serve as bases for future evaluations of the suitability of habitats under altered environmental conditions, such as degradation and climate change. The study was performed with the help of radio-tracking in two different types of… Expand
Does forest loss affect body condition and individual ranging patterns in radiated tortoises ( Astrochelys radiata, Shaw 1802)?
TLDR
Findings of how radiated tortoises, Astrochelys radiata, responded to this habitat degradation are presented, providing insight of the flexibility of A. radiata towards habitat changes, and might be of vital importance for the species conservation. Expand
Development of Technical Reintroduction and Population Monitoring of Radiated Tortoises Astrochelys radiata in Southern Madagascar: Ampotaka
TLDR
The research project “Development of Technical Reintroduction and Population Monitoring of Radiated Tortoises in Southern Madagascar: Ampotaka” in a pre-identified natural environment conducive to their growth will preserve their viability, and predetermine site fidelity through an acclimation period before release. Expand
Development of Technical Reintroduction and Population Monitoring of Radiated Tortoises Astrochelys radiata in Southern Madagascar: Ampotaka
TLDR
The research project “Development of Technical Reintroduction and Population Monitoring of Radiated Tortoises in Southern Madagascar: Ampotaka” in a pre-identified natural environment conducive to their growth will preserve their viability, and predetermine site fidelity through an acclimation period before release. Expand
Characterization of seasonal reproductive and stress steroid hormones in wild Radiated Tortoises, Astrochelys radiata.
TLDR
This study is one of the first to document and describe multi-year seasonal stress and reproductive hormones in a free-ranging Malagasy chelonian and suggest there is high species plasticity in response to stress. Expand
Feed selection on dry rangelands in southwestern Madagascar: Implications for ruminant nutrition in view of ecological and social challenge
TLDR
Analysis of the use of natural forage by cattle and goats in southwestern Madagascar against seasonal variability and spatial disparity in feed quality and quantity found Euphorbia stenoclada and Opuntia monacantha were important supplementary species to bridge feed shortages. Expand
Tick (Amblyomma chabaudi) infestation of endemic tortoises in southwest Madagascar and investigation of tick-borne pathogens.
TLDR
Habitat degradation seems to be linked to higher infestation of tortoises with ticks with possible consequences for humans and their livestock. Expand
Frugivory and seed dispersal by chelonians: a review and synthesis
TLDR
The knowledge of chelonian FSD is synthesised, and the relevance of the findings for conservation and restoration is discussed, especially in relation to rewilding with large and giant tortoises. Expand
Frugivory and seed dispersal by chelonians: A review and synthesis
TLDR
The role of chelonians as seed dispersers, from individual species to the community level, is assessed, and the relevance of the findings for conservation and restoration is discussed, especially in relation to rewilding with large and giant tortoises. Expand

References

SHOWING 1-10 OF 70 REFERENCES
Riverbeds demarcate distinct conservation units of the radiated tortoise (Geochelone radiata) in southern Madagascar
TLDR
This is the first study to report the genetic structure of a species sampled throughout the Malagasy spiny forest, and identified three distinct conservation units with relatively high assignments rates, which should be valuable for the management of the species. Expand
Home range and habitat of the desert tortoise (Xerobates agassizi) in the Picacho Mountains of Arizona
TLDR
Monitoring of desert tortoises in the Picacho Mountains of Arizona confirmed that habitat use differences between the two deserts complement the geographic trends observed in mitochondrial DNA and morphometric surveys of these regions. Expand
Population density and seasonal activity of the threatened Madagascar spider tortoise (Pyxis arachnoides arachnoides) of the southern dry forests; South West Madagascar
The Madagascar spider tortoise Pyxis arachnoides is facing pressure from habitat destruction, hunting for food and collection for the exotic pet-trade. Very little is known of the biology and ecologyExpand
The use of shell morphometrics for the management of the endangered malagasy radiated tortoise (Geochelone radiata)
TLDR
The abundance of tortoises, a variable strongly linked to the level of human exploitation at each site, was correlated with the morphometric differentiation of populations, suggesting that humans may have played a role in the recent evolution of radiated tortoise. Expand
Gray-brown Mouse Lemurs (Microcebus griseorufus) as an Example of Distributional Constraints through Increasing Desertification
Climate change will impose new constraints on the distribution of species through desertification. Small-scale endemists common in biodiversity hotspots such as Madagascar are especially threatened.Expand
Seasonal variation in the diet of Galidictis grandidieri Wozencraft, 1986 (Carnivora: Eupleridae) in a sub‐arid zone of extreme south‐western Madagascar
TLDR
The diet of Grandidier's Vontsira Galidictis grandidieri is described, one of the rarest carnivorans in the world and restricted to an area of 400 km2 in the spiny forest of south-western Madagascar, where about 90% of all prey consumed had body masses below 10 g. Expand
Observations on diet and drinking behaviour of radiated tortoises (Geochelone radiata) in Southwest Madagascar
TLDR
To obtain a full understanding of dietary requirements of Radiated Tortoises, more intense studies must be undertaken which include fecal analysis, germination trials, and a measure of relative abundance of plant life found in the habitat. Expand
Commentary on conservation of "Sokatra" the radiated tortoise (Geochelone radiata) of Madagascar
TLDR
It is recommended that downgrading the sokatra to CITES Appendix II might be beneficial to the survival of the species if certain conditions are met, such as careful controls on the number of legally exported animals. Expand
Tree dispersal strategies in the littoral forest of Sainte Luce (SE-Madagascar)
TLDR
Five large-seeded tree species seem to depend critically on the largest lemur, Eulemur fulvus collaris, for seed dispersal, which seems to be the consequence of the extinction of the larger frugivorous birds and lemurs which might also have fed on these large fruits, Nevertheless these interactions are of crucial importance to conserve the integrity of the forest. Expand
Testudo graeca graeca feeding ecology in an arid and overgrazed zone in Morocco
TLDR
The first quantitative data on Testudo graeca graeca feeding ecology, in the central Jbilets (Morocco), suggests that diet overlap may occur between domestic ungulates and tortoises in overgrazed landscape and could generate a competition context. Expand
...
1
2
3
4
5
...