Phyllomedusa bicolor explained

Phyllomedusa bicolor, the giant leaf frog, bicolor tree-frog, giant monkey frog,[1] or waxy-monkey treefrog,[2] is a species of leaf frog. It can be found in the Amazon basin of Brazil, Colombia (Amazonas), Bolivia, and Peru, and can also be found in the Guianan Region of Venezuela and the Guianas, and in Cerrado of the state of Maranhão in Brazil.[3]

Description

Males measure 91mm103mm and females 111mm119mm in snout–vent length. The dorsum is lime green whereas the belly is white to yellow-white or cream. Lower lips, chest and front legs bear sparse white spots with dark frames; these are more dense on the flanks and hind legs. Fingers are transparent brown and have large, green adhesive discs. There is a prominent gland extending from behind each eye over the tympanum. The iris is dark gray.[2]

Distribution and habitat

It is found throughout the Amazon Rainforest in Bolivia, the Guianas, Brazil, Colombia, Venezuela, and Peru. This frog has been found in gallery forest.

Ecology and behaviour

The giant leaf frog is a nocturnal, arboreal frog. Males call from trees in tropical humid forests. Males fight each other for mating rights by using their heads to attempt to separate another male who is attached to a female. Males fend off rivals using a series of aggressive calls and use their hind legs to push away the rival. During mating season, males may be targeted more by predators as the fights between males are very vocal and can be easily heard by predators. However, to combat this, giant leaf frogs produce peptides in their skin that serves as a chemical defence. Giant leaf frogs reproduce like most frog species through amplexus, where the male climbs onto the female's back to fertilize the eggs. The female and male construct a leaf-nest above forest pools, where the eggs are laid in a gelatinous mass of about 70 cm above the water. The eggs hatch from these nests in approximately 14 days, and the tadpoles fall into the water, where they continue the development into adult frogs. Peak reproduction occurs during the rainy season.[2] Eggs of the giant leaf frog are heavily predated and have a predation rate of up to 61%. Species that prey on the eggs include staphilynid beetles, phorid flies, mammals – specifically capuchin monkeys– and other predators, such as snakes. The eggs are predated because they are source of protein for predators.[4]

Conservation

The IUCN endangered species database lists them in the "Least Concern" category, in view of their current wide distribution and large population.

Medicinal use

See main article: Kambo cleanse. The skin secretion of the giant leaf frog is known as Vacina do sapo (frog vaccine) and contains the opioid peptides deltorphin, deltorphin I, deltorphin II and dermorphin.[5] [6] [7] [8] The secretion, known as Kambo or Sapo, has seen increasing popularity in cleansing rituals, where it induces intense vomiting.[9] [10]

External links

Notes and References

  1. Web site: Phyllomedusa bicolor (Boddaert, 1772). Frost, Darrel R.. 2015. Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. 25 August 2015.
  2. Web site: Phyllomedusa bicolor . 2015 . AmphibiaWeb: Information on amphibian biology and conservation. [web application] . Berkeley, California: AmphibiaWeb . 25 August 2015.
  3. Venâncio. Nathocley. Melo-Sampaio. Paulo. 2010. Reproductive behavior of the giant leaf frog Phyllomedusa bicolor (Anura: Hylidae) in the western Amazon. Phyllomedusa: Journal of Herpetology. 9. 1. 63–67. 10.11606/issn.2316-9079.v9i1p63-67. free.
  4. Neckel-Oliveira. Selvino. Wachlevski. Milena. 2004. Predation on the Arboreal Eggs of Three Species of Phyllomedusa in Central Amazonia. Journal of Herpetology. 38. 2. 244–248. 10.1670/162-03A. 86277566.
  5. Erspamer V, Melchiorri P, Falconieri-Erspamer G, etal . Deltorphins: a family of naturally occurring peptides with high affinity and selectivity for delta opioid binding sites . . 86 . 13 . 5188–92 . July 1989 . 2544892 . 297583 . 10.1073/pnas.86.13.5188. 1989PNAS...86.5188E . free .
  6. Lacombe C, Cifuentes-Diaz C, Dunia Iz Auber-Thomay M, Nicolas P, Amiche M . Peptide secretion in the cutaneous glands of South American tree frog Phyllomedusa bicolor: an ultrastructural study . European Journal of Cell Biology . 79 . 9 . 631–641 . September 2000 . 10.1078/0171-9335-00085. 11043404 .
  7. Melchiorri P, Negri L . The dermorphin peptide family . General Pharmacology: The Vascular System . 27 . 7 . 1099–107 . 1996 . 8981054 . 10.1016/0306-3623(95)02149-3.
  8. Amiche M, Delfour A, Nicolas P . Opioid peptides from frog skin . Exs . 85 . 57–71 . 1998 . 9949868 . 10.1007/978-3-0348-8837-0_4. 2024-08-10 . 978-3-0348-9794-5 .
  9. The syndrome of inappropriate antidiuretic hormone secretion after giant leaf frog (Phyllomedusa bicolor) venom exposure. Leban, V. Kozelk, G. Brvar, M . Toxicon. 120. 107–109. 2016. 10.1016/j.toxicon.2016.07.007. 27421671. 2016Txcn..120..107L .
  10. News: How Amazonian Tree Frog Poison Became the Latest Treatment for Addiction. Daly. Max . Vice. May 10, 2016. October 31, 2018. https://web.archive.org/web/20180907171541/https://www.vice.com/en_au/article/gqkxa9/kambo-ceremony-alcoholism-purging-uk. September 7, 2018.