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Erschienen in: EcoHealth 3/2009

01.09.2009 | Short Communication

The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America

verfasst von: Luís Felipe Toledo, Ricardo S. Ribeiro

Erschienen in: EcoHealth | Ausgabe 3/2009

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Abstract

Malformed anurans raise concern among scientists, because deformities may relate to the recent global crisis among amphibian populations, although declining populations also may be associated with other causes (e.g., diseases, over-exploitation, and land use/land cover change). We examined a sample of toads (Rhinella jimi, Bufonidae) from an introduced population in the Archipelago of Fernando de Noronha, Brazil where malformations of anurans were thought to be high. Our sample of 159 specimens from the site revealed that 44.6% of all specimens had one or more malformations. Incidence of malformed toads on the mainland sites was substantially lower: 10.5% at Itamaracá, and 3.7% at Propriá. We describe the malformations observed, including six undescribed types of malformation of anurans, and we pose possible hypotheses to explain this high incidence of malformed toads. In addition to existing hypotheses, we suggest for the first time the hypothesis that lack of predation pressures contributes to numbers of malformed toads. We indicate the need of specific studies to understand the causes of malformations in the R. jimi population of Fernando de Noronha, which is thought to be extreme foci of malformed amphibians in the world. Our results may improve local conservation action plans as this is an alien population that may be affecting endemic fauna, and may affect populations in other parts of the world, because toad species of the genus Rhinella are recognized as exceptional colonizers. More importantly, unknown variables in these toads’ environment are evidently affecting toads during development, which should be a concern for all species that inhabit the area, perhaps even humans.
Literatur
Zurück zum Zitat Ankley GT, Tietge JE, DeFoe DL, Hjensen KM, Holcombe GW, Durhan EJ, Diamond A (1998) Effects of ultraviolet light and methoprene on survival and development of Rana pipiens. Environmental Toxicology and Chemistry 17:2530-2542 Ankley GT, Tietge JE, DeFoe DL, Hjensen KM, Holcombe GW, Durhan EJ, Diamond A (1998) Effects of ultraviolet light and methoprene on survival and development of Rana pipiens. Environmental Toxicology and Chemistry 17:2530-2542
Zurück zum Zitat Ankley GT, Tietge JE, Holcombe GW, DeFoe DL, Diamond SA, Jensen KM, Degitz SL (2000) Effects of laboratory ultraviolet radiation and natural sunlight on survival and development of Rana pipiens. Canadian Journal of Zoology 78:1092-1100CrossRef Ankley GT, Tietge JE, Holcombe GW, DeFoe DL, Diamond SA, Jensen KM, Degitz SL (2000) Effects of laboratory ultraviolet radiation and natural sunlight on survival and development of Rana pipiens. Canadian Journal of Zoology 78:1092-1100CrossRef
Zurück zum Zitat Blaustein AR, Johnson PT (2003) The complexity of deformed amphibians. Frontiers in Ecology and Environment 2:87-94CrossRef Blaustein AR, Johnson PT (2003) The complexity of deformed amphibians. Frontiers in Ecology and Environment 2:87-94CrossRef
Zurück zum Zitat Burkhart JG, Helgen JC, Fort DJ, Gallagher K, Bowers D, Propst TL, Gernes M, Magner J, Shelby MD, Lucier G (1998) Induction of mortality and malformation in Xenopus laevis embryos by water sources associated with field frog deformities. Environmental Health Perspectives 106(12):841-848CrossRef Burkhart JG, Helgen JC, Fort DJ, Gallagher K, Bowers D, Propst TL, Gernes M, Magner J, Shelby MD, Lucier G (1998) Induction of mortality and malformation in Xenopus laevis embryos by water sources associated with field frog deformities. Environmental Health Perspectives 106(12):841-848CrossRef
Zurück zum Zitat Burton EC, Miller DL, Styer EL, Gray MJ (2008) Amphibian ocular malformation associated with frog virus 3. The Veterinary Journal 177:442–444CrossRef Burton EC, Miller DL, Styer EL, Gray MJ (2008) Amphibian ocular malformation associated with frog virus 3. The Veterinary Journal 177:442–444CrossRef
Zurück zum Zitat Cohen MM Jr (2001) Frog decline, frog malformations, and a comparison of frog and human health. American Journal of Medical Genetics 104:101-109CrossRef Cohen MM Jr (2001) Frog decline, frog malformations, and a comparison of frog and human health. American Journal of Medical Genetics 104:101-109CrossRef
Zurück zum Zitat Gollmann G, Hödl W, Ohler A (1984) A tadpole from a Bombina hybrid population: a hopeless monster. Amphibia-Reptilia 5:411-415 Gollmann G, Hödl W, Ohler A (1984) A tadpole from a Bombina hybrid population: a hopeless monster. Amphibia-Reptilia 5:411-415
Zurück zum Zitat Haddad CFB, Cardoso AJ, Castanho LM (1990) Hibridação natural entre Bufo ictericus e Bufo crucifer (Amphibia: Anura). Revista Brasileira de Biologia 50(3):739-744 Haddad CFB, Cardoso AJ, Castanho LM (1990) Hibridação natural entre Bufo ictericus e Bufo crucifer (Amphibia: Anura). Revista Brasileira de Biologia 50(3):739-744
Zurück zum Zitat Johnson PTJ, Lunde KB, Ritchie EG, Reaser JK, Launer AE (2001) Morphological abnormality patterns in a California amphibian community. Herpetologica 57:336–352 Johnson PTJ, Lunde KB, Ritchie EG, Reaser JK, Launer AE (2001) Morphological abnormality patterns in a California amphibian community. Herpetologica 57:336–352
Zurück zum Zitat Johnson PTJ, Lunde KB, Thurman EM, Ritchie EG, Wray SN, Sutherland DR, Kapfer JM, Frest TJ, Bowerman J, Blaustein AR (2002) Paraiste (Ribeiroia ondatrae) infection linked to amphibian malformations in the western United States. Ecological Monographs 72(2):151-168CrossRef Johnson PTJ, Lunde KB, Thurman EM, Ritchie EG, Wray SN, Sutherland DR, Kapfer JM, Frest TJ, Bowerman J, Blaustein AR (2002) Paraiste (Ribeiroia ondatrae) infection linked to amphibian malformations in the western United States. Ecological Monographs 72(2):151-168CrossRef
Zurück zum Zitat Kiesecker JM (2002) Synergism between trematode infection and pesticide exposure: a link to amphibian limb deformities in nature? Proceedings of the National Academy of Sciences 99:9900–9904 Kiesecker JM (2002) Synergism between trematode infection and pesticide exposure: a link to amphibian limb deformities in nature? Proceedings of the National Academy of Sciences 99:9900–9904
Zurück zum Zitat Lannoo M (2008) The collapse of aquatic ecosystems: malformed frogs. University of California Press, 270 pp Lannoo M (2008) The collapse of aquatic ecosystems: malformed frogs. University of California Press, 270 pp
Zurück zum Zitat Leblois R, Rousset F, Tikel D, Moritz C, Estoup A (2000) Absence of evidence for isolation by distance in an expanding cane toad (Bufo marinus) population: an individual-based analysis of microsatellite genotypes. Molecular Ecology 9:1905-1909CrossRef Leblois R, Rousset F, Tikel D, Moritz C, Estoup A (2000) Absence of evidence for isolation by distance in an expanding cane toad (Bufo marinus) population: an individual-based analysis of microsatellite genotypes. Molecular Ecology 9:1905-1909CrossRef
Zurück zum Zitat Meteyer CU (2000) Field guide to malformations of frogs and toads with radiographic interpretations. Biological Science Report USGS/BRD/BSR-2000-0005 Meteyer CU (2000) Field guide to malformations of frogs and toads with radiographic interpretations. Biological Science Report USGS/BRD/BSR-2000-0005
Zurück zum Zitat Meteyer CU, Loeffler IK, Fallon JF, Converse KA, Green E, Helgen JC, Kersten S, Levey R, Eaton-Poole L, Burkhart JG (2000) Hind limb malformations in free-living northern Leopard Frogs (Rana pipiens) from Maine, Minnesota, and Vermont suggest multiple etiologies. Teratology 62:151–171CrossRef Meteyer CU, Loeffler IK, Fallon JF, Converse KA, Green E, Helgen JC, Kersten S, Levey R, Eaton-Poole L, Burkhart JG (2000) Hind limb malformations in free-living northern Leopard Frogs (Rana pipiens) from Maine, Minnesota, and Vermont suggest multiple etiologies. Teratology 62:151–171CrossRef
Zurück zum Zitat Oren DC (1984) Resultados de uma nova expedição zoológica a Fernando de Noronha. Boletim do Museu Paraense Emílio Goeldi. Zoologia 1(1):19-44 Oren DC (1984) Resultados de uma nova expedição zoológica a Fernando de Noronha. Boletim do Museu Paraense Emílio Goeldi. Zoologia 1(1):19-44
Zurück zum Zitat Ouellet M, Bonin J, Rodrigue J, DesGranges JL, Lair S (1997) Hind limb deformities (ectromelia, ectrodactyly) in free-living anurans from agricultural habitats. Journal of Wildlife Diseases 33:95-104 Ouellet M, Bonin J, Rodrigue J, DesGranges JL, Lair S (1997) Hind limb deformities (ectromelia, ectrodactyly) in free-living anurans from agricultural habitats. Journal of Wildlife Diseases 33:95-104
Zurück zum Zitat Roy D (2002) Amphibians as environmental sentinels. Journal of Bioscience 27(3):187-188CrossRef Roy D (2002) Amphibians as environmental sentinels. Journal of Bioscience 27(3):187-188CrossRef
Zurück zum Zitat Sabath MD, Boughton WC, Easteal S (1981) Expansion of the range of the introduced toad Bufo marinus in Australia from 1935 to 1974. Copeia 1981:676–680CrossRef Sabath MD, Boughton WC, Easteal S (1981) Expansion of the range of the introduced toad Bufo marinus in Australia from 1935 to 1974. Copeia 1981:676–680CrossRef
Zurück zum Zitat Schoff PK, Johnson CM, Schotthoefer AM, Murphy JE, Lieske C, Cole RA, Johnson LB, Beasley VR (2003) Prevalence of skeletal and eye malformations in frogs from north-central United States: estimations based on collections from randomly selected sites. Journal of Wildlife Diseases 39(3):510-521 Schoff PK, Johnson CM, Schotthoefer AM, Murphy JE, Lieske C, Cole RA, Johnson LB, Beasley VR (2003) Prevalence of skeletal and eye malformations in frogs from north-central United States: estimations based on collections from randomly selected sites. Journal of Wildlife Diseases 39(3):510-521
Zurück zum Zitat Williams RN, Bos DH, Gopurenko D, DeWoody JA (2008) Amphibian malformations and inbreeding. Biology Letters 4(5):549-552CrossRef Williams RN, Bos DH, Gopurenko D, DeWoody JA (2008) Amphibian malformations and inbreeding. Biology Letters 4(5):549-552CrossRef
Metadaten
Titel
The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America
verfasst von
Luís Felipe Toledo
Ricardo S. Ribeiro
Publikationsdatum
01.09.2009
Verlag
Springer-Verlag
Erschienen in
EcoHealth / Ausgabe 3/2009
Print ISSN: 1612-9202
Elektronische ISSN: 1612-9210
DOI
https://doi.org/10.1007/s10393-010-0277-2

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