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European fire-bellied toad

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European fire-bellied toad
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Bombinatoridae
Genus: Bombina
Species:
B. bombina
Binomial name
Bombina bombina
(Linnaeus, 1758)
Synonyms
List
  • Rana bombina (Linnaeus, 1758)
  • Buffo ignicolor (Lacépède, 1788)
  • Bufo bombinus (Latreille in Sonnini de Manoncourt and Latreille, 1801)
  • Rana ignea (Shaw, 1802)
  • Bufo pluvialis (Daudin, 1802)
  • Rana cruenta (Pallas, 1814)
  • Bombinator igneus (Merrem, 1820)
  • Bombina ignea (Sturm, 1828)
  • Bufo (Bombinator) bombina (Cuvier, 1829)
  • Bombitator bombinus (Wagler, 1830)
  • Bufo cruentus (Dvigubsky, 1832)
  • Bufo bombinus (Schinz, 1833)
  • Bufo bombina (Schinz, 1837)
  • Bombinator igneus (Boulenger, 1882)
  • Bombinator bombina (Bedriaga, 1890)
  • Bombinator variegatus bombina (Prazák, 1898)
  • Bombina bombina (Stejneger, 1907)
  • Bombina (Bombina) bombina (Tian and Hu, 1985)

The European fire-bellied toad (Bombina bombina) is a species of fire-bellied toad native to eastern parts of mainland Europe, where it can be found near waterbodies such as ponds and marshes.[2][3] It is known for its red colored belly used to ward off predators, an example of aposematism, and its distinctive "whoop" call.[4][5]

Description

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The European fire-bellied toad is a medium sized frog, growing up to approximately 5.6 centimetres (2+3⁄16 in).[4] The dorsal coloration can vary from gray to brown to green, while the stomach is red with thick black mottling. The backs of these frogs are covered in warts.

When threatened by a predator, the fire-bellied toad will lift up its arms (sometimes flipping over) to expose its red coloration and show off its toxicity to the potential predator. This is known as Unkenreflex, and is an example of aposematism.

European fire-bellied toad lifting its arms and legs as a defense mechanism

Distribution

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The European fire-bellied toad is found throughout Central and Eastern Europe.[3] More particularly, its range starts in eastern Germany (including eastern Denmark and parts of southern Sweden), and then east to the Volga District of Russia where they are stopped by the Ural Mountains.[4] The frog's most southern range is Bulgaria and the Marmara Region of Turkey.[6][7][8]

There is an introduced population of European fire-bellied toads in Lorraine, France, over 500 kilometres (310 mi) away from their natural range in eastern Germany.[9] This population was first discovered in 2009 in Moselle but has since been found in several other nearby locations up to 30 kilometres (19 mi) away, which suggests they were moved by humans intentionally. They can potentially impact the local yellow-bellied toads through hybridization.

While they are listed as "Least Concern" by the IUCN, this frog has been suffering some losses throughout its range. For example, 15 known breeding populations of these frogs were identified in Denmark in 1974, but by 1988 only 8 of those populations remained.[10] In the Puszcza Romincka Landscape Park in Poland, the fire-bellied toad was described as uncommon,[11] rare in the Coastal Landscape Park,[12] and in an amphibian survey in Warsaw the fire-bellied toad only made up 9% of the observed species.[13] However, in some areas they are recovering through human intervention, such as in Funen County, Denmark, where dozens of ponds were dug for the frogs to live and breed in, increasing their population approximately five-fold in a decade.[14]

Ecology

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This frog generally prefers to live in lowland areas such as ponds and marshes without too much woody vegetation.[11] In larger lakes these frogs will stay on the edges (50 to 70 centimetres (20 to 28 in) deep) in reed beds and floodplains.[9] They feed on all sorts of small invertebrates, in particular springtails, beetles, flies, and ants.[15][16] In return, the frogs are preyed on by many other animals such as snakes and birds,[17] while tadpoles are eaten by leeches and fish.[18]

They will typically hibernate once temperatures dip down to 4 °C (39 °F), during which they burrow into soil or a rotting log and remain in a state of torpor until spring.[4] Breeding commences once temperatures reach 16 °C (61 °F)[19] and is usually done at night time or early morning, where females will deposit up to 15 to 40 eggs depending on their size.[18][20] Tadpoles are born in about a week and develop for approximately a month before metamorphosing at a size of about 3.8 centimetres (1+1⁄2 in)).[18]

Evolution

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The European fire-bellied toad (B. bombina) and yellow-bellied toad (B. variegata) are the product of clinal speciation.[21] They emerged from an ancient divergence event, however they continue to hybridise where they overlap geographically.[21] Yanchukov et al. 2006's survey of these species aids understanding of clinal speciation itself: Because different subpopulations carry different combinations of the reproductive isolation mechanisms, and because they combine data from a new transect with four preceding transects, their comparison and reanalysis of this speciation process helps to understand the contribution of single-nucleotide polymorphisms to clinal speciation.[21] Clinal speciation is a challenging dynamic to study and so Yanchukov is one of the few to provide insight into this relationship.[21]

Their speciation occurred during the Pleistocene epoch.[citation needed] The ancestor to both species was confined to southern Europe during the Last Glacial Maximum, where B. variegata evolved in the mountains in the west (Apennine and Balkans) and B. bombina in the lowlands to the east (the steppes around the Black and Caspian Sea).[22] As the glaciers receded, both species spread out to the rest of Europe but hybridized and competed with each other until B. bombina occupied the lowlands and B. variegata the higher altitudes.[citation needed]

While the two frogs hybridize in narrow hybrid zones of approximately 2 to 7 kilometres (1.2 to 4.3 mi) wide,[23] they generally avoid it by differing in their morphology and behavior. B. bombina prefers to breed in lowland seasonal ponds, such as wet meadows and floodplains, but ones that are still close to nearby permanent waterbodies. On the other hand, B. variegata prefers to breed in higher elevations in ephermal ponds that are quick to dry up.[23] B. bombina also spends more time confined to a waterbody compared to B. variegata, which is more terrestrial and has evolved longer legs and thicker skin to aid in their frequent migrations onto dry land.[24][25][26] Additionally, B. variegata is unable to sing as loudly as B. bombina due to their lack of internal vocal sacs, which forces them to find other breeding ponds without the other species of fire-bellied toad.[23][5]

Secondary metabolites

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Like its relatives – including B. variegata[27] and B. orientalis[28] – B. bombina produces bombinins.[29] The H. Michl group in Vienna were the first to study B. bombina and B. variegata, first publishing a partial bombinin amino acid sequence in Kiss & Michl 1962.[29] A few years later they discovered it was merely the carboxy terminal of a larger molecule in Csordás & Michl 1970, also showing antibacterial effect.[29] The antifungal effect of bombinins in the toads' skin makes them promising factors for incorporation into food packaging to retard spoilage.[29] More recently Jilek et al. 2005 searched for homologues of the isomerase and found the closest in Xenopus tropicalis, but also finding predicted homologues in various other vertebrates including the chicken (Gallus domesticus).[29]

The prokineticin family of compounds was first discovered in this species and B. variegata.[30] These two species produce Bv8 and subsequently other prokineticins have been isolated from other species in the genus, and predicted in Rana temporaria and Pelophylax esculentus.[30][31]

References

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  1. ^ Aram Agasyan; Aziz Avisi; Boris Tuniyev; Jelka Crnobrnja Isailovic; Petros Lymberakis; Claes Andrén; Dan Cogalniceanu; John Wilkinson; Natalia Ananjeva; Nazan Üzüm; Nikolai Orlov; Richard Podloucky; Sako Tuniyev; Uğur Kaya (2009). "Bombina bombina". IUCN Red List of Threatened Species. 2009: e.T2865A9489517. doi:10.2305/IUCN.UK.2009.RLTS.T2865A9489517.en. Retrieved 11 November 2021.
  2. ^ "Fire-bellied toad - Bombina bombina (Linnaeus, 1761)". European Environment Agency. 22 April 2019. Retrieved 14 April 2022.
  3. ^ a b Kuzmin; et al. (8 December 2019). "Bombina bombina". AmphibiaWeb. Retrieved 14 April 2022.
  4. ^ a b c d Lang, Mathias (26 November 1988). "Notes on the Genus bombina Oken (Anura: Bombinatoridae)". British Herpetological Society Bulletin. Archived from the original on Jul 30, 2023.
  5. ^ a b "Fire-bellied toad". Lifeamphicon. 7 May 2020. Retrieved 14 April 2022.
  6. ^ Yilmaz, İrfan (January 1986). "On the distribution of the Fire-bellied Toad, Bombina bombina, in Turkey". Zoology in the Middle East. 1 (1): 109–110. doi:10.1080/09397140.1986.10637528.
  7. ^ Uğurtaş; et al. (10 December 1999). "Two New Localities for Bombina bombina (Anura, Discoglossidae) in Turkey". Russian Journal of Herpetology. 6 (3). Archived from the original on Jul 30, 2023.
  8. ^ Çevik; et al. (January 2008). "A mark-recapture study of the fire-bellied toad (Bombina bombina) using Digital Photographic Recognition and Dye Marking Techniques in North-western Turkey". Acta Biologica Universitatis Daugavpiliensis. 8 (1): 75–80 – via ResearchGate.
  9. ^ a b Aumaître, Damien (2020). Le Sonneur à ventre de feu Bombina bombina (Linnaeus, 1760) en Lorraine: historique, synthèse des études et problématique (PDF) (Report). Conservatoire d'espaces naturels de Lorraine, Commission Reptiles et Amphibiens de Lorraine, Grand Est – via Centre de Ressources: Espèces Exotiques Envahissantes.
  10. ^ Briggs; et al. (January 1988). "Status for Bombina bombina in Denmark". Memoranda - Societatis Pro Fauna et Flora Fennica. 64 (3): 97–99 – via ResearchGate.
  11. ^ a b Hermaniuk; et al. (January 2006). "Amphibian fauna of the Romincka Forest Landscape Park". Płazy Parku Krajobrazowego Puszczy Rominckiej – via ResearchGate.
  12. ^ Arciszewski; et al. (April 2012). "Płazy Nadmorskiego Parku Krajobrazowego i jego otuliny". Parki Nar. Rez. Pryzr. 31 (2): 77–92 – via ResearchGate.
  13. ^ Mazgajska, Joanna (January 1996). "Distribution of amphibians in urban water bodies (Warsaw agglomeration, Poland)". Polish Journal of Ecology. 44 (3): 245–257 – via ResearchGate.
  14. ^ Briggs, Lars (January 1997). "Recovery of Bombina bombina in Funen County, Denmark". ResearchGate.
  15. ^ Széplaki (May 2006). "Feeding niche characteristics of a Bombina bombina population from Livada Plain (Satu-Mare County, Romania)". Analele Universităţii din Oradea, Fascicula Biologie. 13: 14–17 – via ResearchGate.
  16. ^ "AmphibiaWeb - Bombina bombina".
  17. ^ Cook, William (1987). "AMPHIBIANS AND BIRDS" (PDF). Smithsonian Herpetological Information Service. 73 – via Smithosonian Research Online.
  18. ^ a b c Kinne; et al. (3 February 2004). "Breeding, rearing and raising the red-bellied toad Bombina bombina in the laboratory" (PDF). Endangered Species Research. 1: 11–23. doi:10.3354/esr001011 – via Inter-Research Science Publisher.
  19. ^ Birkenmeier, Elmar (1954). "Beobachtungen zur Nahrungsaufnahme und Paarungsbiologie der Gattung Bombina" (PDF). Verhandlungen der Zoologisch-Botanischen Gesellschaft in Wien. 94.
  20. ^ Rafińska, Anna (July 1991). "Reproductive biology of the fire-bellied toads, Bombina bombina and B. variegata (Anura: Discoglossidae): egg size, clutch size and larval period length differences". Biological Journal of the Linnean Society. 43 (3): 197–210. doi:10.1111/j.1095-8312.1991.tb00593.x – via Oxford Academic.
  21. ^ a b c d Abbott, R.; Albach, D.; Ansell, S.; Arntzen, J. W.; Baird, S. J. E.; Bierne, N.; Boughman, J.; Brelsford, A.; Buerkle, C. A.; Buggs, R.; Butlin, R. K.; Dieckmann, U.; Eroukhmanoff, F.; Grill, A.; Cahan, S. H.; Hermansen, J. S.; Hewitt, G.; Hudson, A. G.; Jiggins, C.; Jones, J.; Keller, B.; Marczewski, T.; Mallet, J.; Martinez-Rodriguez, P.; Möst, M.; Mullen, S.; Nichols, R.; Nolte, A. W.; Parisod, C.; Pfennig, K.; Rice, A. M.; Ritchie, M. G.; Seifert, B.; Smadja, C. M.; Stelkens, R.; Szymura, J. M.; Väinölä, R.; Wolf, J. B. W.; Zinner, D. (2013-01-17). "Hybridization and speciation". Journal of Evolutionary Biology. 26 (2). European Society for Evolutionary Biology (Wiley): 229–246. doi:10.1111/j.1420-9101.2012.02599.x. ISSN 1010-061X. PMID 23323997. S2CID 830823.
  22. ^ Arntzen, J. W. (December 1978). "Some Hypotheses on Postglacial Migrations of the Fire-Bellied Toad, Bombina bombina (Linnaeus) and the Yellow-Bellied Toad, Bombina variegata (Linnaeus)". Journal of Biogeography. 5 (4): 339–345. Bibcode:1978JBiog...5..339A. doi:10.2307/3038027. JSTOR 3038027.
  23. ^ a b c Smolinský; et al. (7 December 2020). "Tadpoles of hybridising fire-bellied toads (B. bombina and B. variegata) differ in their susceptibility to predation". PLOS ONE. 15 (12): e0231804. Bibcode:2020PLoSO..1531804S. doi:10.1371/journal.pone.0231804. PMC 7721483. PMID 33285552.
  24. ^ Nürnberger; et al. (December 1995). "Natural Selection on Quantitative Traits in the Bombina Hybrid Zone". Evolution. 49 (6): 1224–1238. doi:10.1111/j.1558-5646.1995.tb04449.x. PMID 28568525. S2CID 25393054.
  25. ^ Noor, Mohamed A. F.; Feder, Jeffrey L. (2006-10-03). "Speciation genetics: evolving approaches". Nature Reviews Genetics. 7 (11). Nature Portfolio: 851–861. doi:10.1038/nrg1968. ISSN 1471-0056. PMID 17033626. S2CID 8881255. MAFN ORCID 0000-0002-5400-4408 GS 5nkhrpUAAAAJ.
  26. ^ Barton, N. H. (2008-07-07). "The role of hybridization in evolution". Molecular Ecology. 10 (3). Wiley: 551–568. doi:10.1046/j.1365-294x.2001.01216.x. ISSN 0962-1083. PMID 11298968. S2CID 22129817.
  27. ^ Simmaco, Maurizio; Kreil, Günther; Barra, Donatella (2009). "Bombinins, antimicrobial peptides from Bombina species". Biochimica et Biophysica Acta (BBA) - Biomembranes. 1788 (8). Elsevier: 1551–1555. doi:10.1016/j.bbamem.2009.01.004. ISSN 0005-2736. PMID 19366600.
  28. ^ Thery, Thibaut; Lynch, Kieran M.; Arendt, Elke K. (2019-08-23). "Natural Antifungal Peptides/Proteins as Model for Novel Food Preservatives". Comprehensive Reviews in Food Science and Food Safety. 18 (5). Institute of Food Technologists (Wiley): 1327–1360. doi:10.1111/1541-4337.12480. ISSN 1541-4337. PMID 33336909. S2CID 202020450.
  29. ^ a b c d e [1][2]
  30. ^ a b König, Enrico; Bininda-Emonds, Olaf R.P.; Shaw, Chris (2015). "The diversity and evolution of anuran skin peptides". Peptides. 63. Elsevier: 96–117. doi:10.1016/j.peptides.2014.11.003. ISSN 0196-9781. PMID 25464160. S2CID 12659095.
  31. ^ Negri, L.; Melchiorri, P. (2006). "Opioid peptides from frog skin and Bv8-related peptides". In Kastin, JA (ed.). Handbook of biologically active peptides (1 ed.). Amsterdam: Academic Press. pp. 269–75.
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