@article {58223, title = {Voice of a giant: bioacoustic data for Mantidactylus guttulatus (Amphibia: Mantellidae)}, year = {2004}, abstract = {

The endemic radiation of mantellid frogs from Madagascar (Richards et al., 2000; Vences and Glaw, 2001; Vences et al., 2002) includes a large diversity in terms of morphological and ecological adaptations (Blommers-Schloesser and Blanc, 1991). The smallest species have adult snout-vent lengths of only 11-16 mm, while the two largest species reach more than 100 mm: Mantidactylus guttulatus (up to 120 mm) and M. grandidieri (up to 108 mm). In the large genus Mantidactylus (currently about 75 species in 12 subgenera), M. guttulatus is the type species of the subgenus and genus Mantidactylus (Andreone, in press). These giant Malagasy frogs are widespread in the rainforests of the island and are relative easy to observe. They are quite regularly consumed for food (under the local name of \"radakabe\" or \"radaka\") and can be seen for sale on markets. However, their ecology is so far largely unknown. They are semiaquatic species living in small to medium-sized brooks and torrents but their reproductive behaviour, eggs, tadpoles and vocalizations remained undescribed except for the observation of large oocytes (4- 5 mm) in dissected gravid females. Glaw and Vences (1994) described distress calls of M. grandidieri and hypothesized that, regarding advertisement calls, M. guttulatus may be a non-calling species. In this paper we describe for the first time the advertisement calls of a representative of the subgenus Mantidactylus.

}, doi = {10.1163/156853804322992887}, url = {https://brill.com/view/journals/amre/25/1/article-p112_11.xmlhttps://data.brill.com/files/journals/15685381_025_01_s011_text.pdfhttps://brill.com/view/journals/amre/25/1/article-p112_11.xml}, author = {Frank Glaw and Andreone, Franco and Vences, Miguel} } @article {47708, title = {A new species of the Boophis rappiodes group (Anura, Mantellidae) from the Sahamalaza Peninsula, northwest Madagascar, with acoustic monitoring of~its~nocturnal~calling activity}, journal = {ZooKeys}, volume = {435}, year = {2014}, month = {Jun-08-2015}, pages = {111 - 132}, abstract = {

A new species of treefrog of the Boophis rappiodes group (Anura, Mantellidae) is described from the Sahamalaza \– Iles Radama National Park in northwest Madagascar. This new species is green in colour with bright red speckling across its head and dorsum; similar in morphology to other species of this group including: B. bottae, B. rappiodes, B. erythrodactylus and B. tasymena. The new species can be distinguished by its advertisement call and by a genetic divergence of more than 4.9\% in the analysed mitochondrial 16S rRNA gene fragment. Its call consists of two note types: a trill and a click; although similar sounding to B. bottae, the trill note of the new species has a faster pulse rate while the click note is predominantly two-pulsed rather than three. All individuals were detected from the banks of two streams in Ankarafa Forest. The new species represents the only member of the B. rappiodes group endemic to Madagascar\’s western coast, with the majority of other members known from the eastern rainforest belt. Despite its conspicuous call, it has not been detected from other surveys of northwest Madagascar and it is likely to be a local endemic to the peninsula. The ranges of two other amphibian species also appear restricted to Sahamalaza, and so the area seems to support a high level of endemicity. Although occurring inside a National Park, this species is highly threatened by the continuing decline in the quality and extent of its habitat. Due to these threats it is proposed that this species should be classified as Critically Endangered according to the IUCN Red List criteria.

}, keywords = {advertisement call, Amphibia, Boophis ankarafensis sp. n., conservation, Sahamalaza {\textendash} Iles Radama National Park}, issn = {1313-2989}, doi = {10.3897/zookeys.435.738310.3897}, url = {http://zookeys.pensoft.net/articles.php?id=3990}, author = {Penny, Samuel and Andreone, Franco and Crottini, Angelica and Rakotozafy, Lovasoa and Schwitzer, Christoph and Rosa, Gon{\c c}alo} }