Overview

Comprehensive Description

Description

A small Mantella. Small specimens of slender appearance, large specimens rather stout, 17-24 mm (F 23-24 mm). Head, dorsum and posterior part of flanks yellow, orange or light green, sometimes (mainly in the yellowish specimens) with fine black spots. Sometimes an indistinct dark middorsal line and traces of a diamond marking. Head laterally, and anterior flanks generally black (black pattern can be largely reduced in some specimens), with a sharp dorsolateral colour border. Light frenal stripe present, often interrupted in the yellowish specimens. Bright red flashmarks present. Iris with some light pigment in its upper part. Ventrally black with a variable number and extension of grey to bluish-white or yellowish markings, sometimes fusing to form an irregular network. Horseshoe marking present and mostly distinct, but poorly expressed in some specimens. Hindlimbs sometimes uniformly orange or reddish ventrally, except the red ventral flashmark extension on the tibia. In other specimens, orange colour only present on tibia (except flashmark area); foot, tarsus and femur being black with grey-whitish markings.

Similar species: The colouration of typical M. crocea is unique, but other populations show all intermediates between M. crocea and M. milotympanum. A reliable distinction of these two forms is therefore not possible.

Taken with permission from Glaw and Vences (2007).

  • Raxworthy, C. and Vences, M. (2008). Mantella crocea. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. . Downloaded on 22 April 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 species is known from a few localities covering a very small area in east-central Madagascar: Ifoha west of Parc National de Mantadia; a forest area east of Ambohimanarivo; and outside the Réserve Naturelle Intégrale de Zahamena. Its recorded altitudinal range is 800-1,057m asl.
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Distribution and Habitat

Ambohimanarivo, Ambohitantely, Ampangadimbolana, Ihofa, north of Fierenana. It occurs between 800-1,057m asl in secondary forest and forest edge around swamps but not open areas (Raxworthy and Vences 2008).

  • Raxworthy, C. and Vences, M. (2008). Mantella crocea. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. . Downloaded on 22 April 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 terrestrial species of forest edge around swamps. It has been found in secondary forest, but not in open areas. Breeding is similar to other mantella species, with the eggs laid on the ground and the larvae developing in swamps.

Systems
  • Terrestrial
  • Freshwater
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
EN
Endangered

Red List Criteria
B1ab(iii,v)+2ab(iii,v)

Version
3.1

Year Assessed
2004

Assessor/s
Christopher Raxworthy, Miguel Vences

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

Contributor/s

Justification
Listed as Endangered because its Extent of Occurrence is less than 5,000 km2 and its Area of Occupancy is probably less than 500km2, it is known from a single location, and the extent of its forest habitat in east-central Madagascar is declining, and the number of mature individuals might also be declining through over-exploitation.
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Population

Population
It is locally common, but has a patchy occurrence.

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

M. crocea is active during the day. The call consists of an irregular series of short chirping notes.

Breeding takes place in swamps where the larvae develop (Raxworthy and Vences 2008).

  • Raxworthy, C. and Vences, M. (2008). Mantella crocea. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. . Downloaded on 22 April 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
The forest habitat of this species is receding due to subsistence agriculture, timber extraction, charcoal manufacture, the spread of invasive eucalyptus, livestock grazing, and expanding human settlements. It is also possible that over-collecting for commercial and private purposes is a threat, but this has not been demonstrated.
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Life History, Abundance, Activity, and Special Behaviors

Endangered: extent of occurrence is less than 5,000 km2 and its area of occupancy is probably less than 500km2, it is known from a single location, and the extent of its forest habitat in east-central Madagascar is declining, and the number of mature individuals might also be declining through over-exploitation.It has not been recorded from any protected areas, but is likely to occur in Parc National de Mantadia and the Réserve Naturelle Intégrale de Zahamena. A carefully regulated trade is required for this species (Raxworthy and Vences 2008).

  • Raxworthy, C. and Vences, M. (2008). Mantella crocea. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. . Downloaded on 22 April 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 has not been recorded from any protected areas, but is likely to occur in Parc National de Mantadia and the Réserve Naturelle Intégrale de Zahamena. A carefully regulated trade is required for this species. It is listed on CITES Appendix II.
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Wikipedia

Yellow mantella

The Yellow Mantella (Mantella crocea) 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 swamps, and swamps. It is threatened by habitat loss.

References[edit]

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