Overview

Comprehensive Description

Description

M 26-27 mm, F 27-34 mm. Snout relatively short and body of rather flat appearance. Colour variable, often yellowish brown (Glaw and Vences 2007).

Similar to M. curtus, M. biporus comprises a complex of many species of quite distinct morphology, but their relationships, distribution and diagnostic characters are poorly understood. The name-giving character of the type specimens of M. biporus is a the presence of double rudiments of femoral glands in females, and of the populations studied by us, such glands have only be observed in specimens from Fierenana and near Moramanga which we therefore consider to represent the real species M. biporus.

Taken with permission from Glaw and Vences (2007) and Vallan and Glaw (2008).

  • Vallan, D. and Glaw, F. (2008). Mantidactylus biporus. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 31 March 2009.
  • Glaw, F., and Vences, M. (2007). Field Guide to the Amphibians and Reptiles of Madagascar. Third Edition. Vences and Glaw Verlag, Köln.
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Distribution

Range Description

This is a widely distributed species in northern and eastern Madagascar, with one record in central Madagascar. Two isolated records from west central and south-central Madagascar need to be confirmed. It occurs from sea level up to 1,600m asl.
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Distribution and Habitat

Species occurs in Besariaka near Moramanga, Fierenana (Glaw and Vences 2007).

It is a streamside species in rainforest, including degraded forest, and open areas adjacent to forest. It is often associated with wetlands, bogs, stagnant water, and seeps, but not fast-flowing streams. It occurs from sea level up to 1600m asl (Vallan and Glaw 2008).

  • Vallan, D. and Glaw, F. (2008). Mantidactylus biporus. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 31 March 2009.
  • Glaw, F., and Vences, M. (2007). Field Guide to the Amphibians and Reptiles of Madagascar. Third Edition. Vences and Glaw Verlag, Köln.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
It is a streamside species in rainforest, including degraded forest, and open areas adjacent to forest. It is often associated with wetlands, bogs, stagnant water, and seeps, but not fast-flowing streams. It breeds in permanent and temporary pools and in slow-moving water. Knoll et al. (2007) collected one of the benthic larvae "from a puddle beside a footpath on muddy ground".

Systems
  • Terrestrial
  • Freshwater
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2004

Assessor/s
Denis Vallan, Frank Glaw

Reviewer/s
Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson and Neil Cox)

Contributor/s

Justification
Listed as Least Concern in view of its wide distribution, tolerance of a degree of habitat modification, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.
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Population

Population
It is a locally common species.

Population Trend
Decreasing
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Life History, Abundance, Activity, and Special Behaviors

Habits: Males call during the day from swamps in the flooding zone of small forest streams, in degraded forest.

Calls: A slow series of 3-8 short pulsed notes (Glaw and Vences 2007).

  • Vallan, D. and Glaw, F. (2008). Mantidactylus biporus. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 31 March 2009.
  • Glaw, F., and Vences, M. (2007). Field Guide to the Amphibians and Reptiles of Madagascar. Third Edition. Vences and Glaw Verlag, Köln.
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Threats

Major Threats
Its forest habitat is receding due to subsistence agriculture, timber extraction, charcoal manufacture, and invasive spread of eucalyptus, livestock grazing and expanding human settlements.
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Life History, Abundance, Activity, and Special Behaviors

This species is listed as least concern in view of its wide distribution, tolerance of a degree of habitat modification, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category. Its population is decreasing and it occurs in numerous protected areas throughout the eastern rainforest belt. Its forest habitat is receding due to subsistence agriculture, timber extraction, charcoal manufacture, and invasive spread of eucalyptus, livestock grazing and expanding human settlements (Vallan and Glaw 2008).

  • Vallan, D. and Glaw, F. (2008). Mantidactylus biporus. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 31 March 2009.
  • Glaw, F., and Vences, M. (2007). Field Guide to the Amphibians and Reptiles of Madagascar. Third Edition. Vences and Glaw Verlag, Köln.
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Management

Conservation Actions

Conservation Actions
It occurs in numerous protected areas throughout the eastern rainforest belt.
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Wikipedia

Mantidactylus biporus

Mantidactylus biporus is a species of frog in the Mantellidae family. It is endemic to Madagascar. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, rivers, intermittent rivers, swamps, freshwater marshes, intermittent freshwater marshes, and heavily degraded former forest. It is threatened by habitat loss.

References[edit]

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