Marine and Freshwater Research Marine and Freshwater Research Society
Advances in the aquatic sciences
RESEARCH ARTICLE

First record of a bicephalic chondrichthyan found in Australian waters; the southern fiddler ray, Trygonorrhina dumerilii (Chondrichthyes: Rhinobatidae)

Leonardo Guida A C , Terence I. Walker B and Richard D. Reina A
+ Author Affiliations
- Author Affiliations

A School of Biological Sciences, Monash University, Wellington Road, Clayton, Vic. 3800, Australia.

B Fisheries Victoria, Department of Environment and Primary Industries, PO Box 114, Queenscliff, Vic. 3225, Australia.

C Corresponding author. Email: leonardo.guida@monash.edu

Marine and Freshwater Research 65(5) 396-399 https://doi.org/10.1071/MF13198
Submitted: 24 July 2013  Accepted: 9 September 2013   Published: 15 November 2013

Abstract

We report the first documented case of bicephaly in a chondrichthyan, the southern fiddler ray, Trygonorrhina dumerilii, in Australian waters. Females in the latter stages of pregnancy, as confirmed by ultrasound, were captured by hand in Swan Bay, Victoria (38.252°S, 144.616°E) in February 2013 and transported to aquaria. Up to 10 females gave birth in aquaria in early April 2013 to 11 neonates, one of which was a still-born, bicephalic neonate. Magnetic resonance imagery of the bicephalic neonate displayed the presence of two parallel vertebral columns running the entire length of the animal, diverging into two well formed heads. Morphological measurements were also made, comparing the bicephalic neonate to normal neonates. The cause of bicephaly is unknown, although congenital and environmental stressors during development may cause this condition.

Additional keywords: abnormality, axial bifurcation, deformity, elasmobranch, embryo, morphology.


References

Ball, R. E., Jones, C. S., Lynghammar, A., Noble, L. R., and Griffiths, A. M. (2013). The first confirmed cases of full albinism in rajid species. Journal of Fish Biology 82, 1433–1440.
The first confirmed cases of full albinism in rajid species.CrossRef | 1:STN:280:DC%2BC3srisF2nsg%3D%3D&md5=689d21e3d859d949c816e6261726fa33CAS | 23557319PubMed |

Ben Souissi, J., Golani, D., Mejri, H., Ben Salem, M., and Capapé, C. (2007). First confirmed record of the Halave’s guitarfish, Rhinobatos halavi (Forsskal, 1775) (Chondrichthyes: Rhinobatidae) in the Mediterranean Sea with a description of a case of albinism in elasmobranchs. Cahiers de Biologie Marine 48, 67–75.

Blanco, A., Quintas, P., and Planas, M. (2012). First observations of siamese-twins in newborn seahorses (Hippocampus Guttulatus Cuvier, 1829). Journal of Fish Diseases 35, 705–708.
First observations of siamese-twins in newborn seahorses (Hippocampus Guttulatus Cuvier, 1829).CrossRef | 1:STN:280:DC%2BC38nivVKqtQ%3D%3D&md5=1f458b1be4f8a36ff239ded71fdaa268CAS | 22582751PubMed |

Bornatowski, H., and Abilhoa, V. (2009). Record of an anomalous embryo of Rhinobatos percellens (Elasmobranchii: Rhinobatidae) in the southern coast of Brazil. Marine Biodiversity Records 2, e36.
Record of an anomalous embryo of Rhinobatos percellens (Elasmobranchii: Rhinobatidae) in the southern coast of Brazil.CrossRef |

Bosinceano, A. (1934). Sur un cas de monstre double incomplet chez Squalus acanthias (on a case of incomplete double monster in Squalus acanthias). Annales Scientifiques l’Université de Jassey 19, 339–344.

Camón, J., Sabaté, D., Verdú, J., Rutllant, J., and López-plana, C. (1992). Morphology of a dicephalic cat. Anatomy and Embryology 185, 45–55.
Morphology of a dicephalic cat.CrossRef | 1736684PubMed |

Casarini, L. M., Gomes, U. L., and Tomas, A. R. G. (1997). Would be Santos harbour dredged material dumping a reason of teratogeny on Raja agassizi. In ‘Congresso Latino-Americano Sobre Ciências do Mar Colacmar. Caderno de Resumos 7’. pp. 152–153. (SBEEL: Santos, Brazil.)

Castro-Aguirre, J. L., and Torres-Villegas, J. R. (1979). Sobre un caso de bicefalia funcional en Rhinoptera steindachneri Evermann Y Jenkins (Chondricthys, Elasmobranchii, Batoidei), capturado en la costa occidental de Baja California, Mexico. Ciencias Marinas 6, 27–41.

De Lahunta, A., and Glass, E. N. (2008). ‘Veterinary Neuroanatomy and Clinical Neurology.’ (Saunders: St. Louis, MO.)

Delpiani, S. M., Deli-Antoni, M. Y., Barbini, S. A., and Figueroa, D. E. (2011). First record of a dicephalic specimen of tope Galeorhinus galeus (Elasmobranchii: Triakidae). Journal of Fish Biology 78, 941–944.
First record of a dicephalic specimen of tope Galeorhinus galeus (Elasmobranchii: Triakidae).CrossRef | 1:STN:280:DC%2BC3M3jtlGjug%3D%3D&md5=e79408b5f29f63830b64f7c4e5648aefCAS | 21366584PubMed |

Eriksen, M. S., Espmark, A., Braastad, B. O., Salte, R., and Bakken, M. (2007). Long-term effects of maternal cortisol exposure and mild hyperthermia during embryogeny on survival, growth and morphological anomalies in farmed Atlantic salmon, Salmo salar, offspring. Journal of Fish Biology 70, 462–473.
Long-term effects of maternal cortisol exposure and mild hyperthermia during embryogeny on survival, growth and morphological anomalies in farmed Atlantic salmon, Salmo salar, offspring.CrossRef |

Fernández-Álvarez, F. Á., Recuero, E., Martínez-Solano, I., and Buckley, D. (2011). First record of bicephaly in Lissotriton boscai (Amphibia, Caudata, Salamandridae). North-Western Journal of Zoology 7, 161–163.

Galván-Magaña, F., Escobar-Sánchez, O., and Carrera-Fernández, M. (2011). Embryonic bicephaly in the blue shark, Prionace glauca, from the Mexican Pacific Ocean. Marine Biodiversity Records 4, e1.
Embryonic bicephaly in the blue shark, Prionace glauca, from the Mexican Pacific Ocean.CrossRef |

Gopalan, U. (1971). On two abnormal sharks from Gujarat. Journal of the Bombay Natural History Society 68, 465–466.

Heupel, M. R., Simpfendorfer, C. A., and Bennett, M. B. (1999). Skeletal deformities in elasmobranchs from Australian waters. Journal of Fish Biology 54, 1111–1115.
Skeletal deformities in elasmobranchs from Australian waters.CrossRef |

Hussey, N. E., Wintner, S. P., Dudley, S. F. J., Cliff, G., Cocks, D. T., and MacNeil, M. A. (2010). Maternal investment and size-specific reproductive output in carcharhinid sharks. Journal of Animal Ecology 79, 184–193.
Maternal investment and size-specific reproductive output in carcharhinid sharks.CrossRef | 19845812PubMed |

Knott, N. A., Aulbury, J. P., Brown, T. H., and Johnston, E. L. (2009). Contemporary ecological threats from historical pollution sources: impacts of large-scale resuspension of contaminated sediments on sessile invertebrate recruitment. Journal of Applied Ecology 46, 770–781.
Contemporary ecological threats from historical pollution sources: impacts of large-scale resuspension of contaminated sediments on sessile invertebrate recruitment.CrossRef |

Last, P. R., and Stevens, J. D. (2009). ‘Sharks and Rays of Australia.’ 2nd edn. (CSIRO Publishing: Melbourne.)

Lozano Cabo, D. (1945). Nota sobre un caso de bicefalismo en el Squalus blainvillei (note on a case of bicephalism in Squalus blainvillei). Boletin de la Real Sociedad Espanola de Historia Natural. Seccion Biologica 43, 147–148.

Marshall, L. J., White, W. T., and Potter, I. C. (2007). Reproductive biology and diet of the southern fiddler ray, Trygonorrhina Fasciata (Batoidea: Rhinobatidae), an important trawl bycatch species. Marine and Freshwater Research 58, 104–115.
Reproductive biology and diet of the southern fiddler ray, Trygonorrhina Fasciata (Batoidea: Rhinobatidae), an important trawl bycatch species.CrossRef |

Muñoz-Osorio, L. A., Mejía-Falla, P. A., and Navia, A. F. (2013). First record of a bicephalic embryo of smalltail shark Carcharhinus porosus. Journal of Fish Biology 82, 1753–1757.
First record of a bicephalic embryo of smalltail shark Carcharhinus porosus.CrossRef | 23639171PubMed |

Nesan, D., and Vijayan, M. M. (2012). Embryo exposure to elevated cortisol level leads to cardiac performance dysfunction in zebrafish. Molecular and Cellular Endocrinology 363, 85–91.
Embryo exposure to elevated cortisol level leads to cardiac performance dysfunction in zebrafish.CrossRef | 1:CAS:528:DC%2BC38Xht1emtrfJ&md5=2d6de407061acc6e2852e65356bc26deCAS | 22842336PubMed |

Renshaw, G. M. C., Kutek, A. K., Grant, G. D., and Anoopkumar-Dukie, S. (2012). Forecasting elasmobranch survival following exposure to severe stressors. Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology 162, 101–112.
Forecasting elasmobranch survival following exposure to severe stressors.CrossRef | 1:CAS:528:DC%2BC38XmtFajtrg%3D&md5=e6b3fe87b0c71bc418da15202b40b301CAS |

Rosa, R. S., Mariano, E. F., and Sampaio, C. L. S. (2004). Má-formação em Rhinobatus percellens Jord & Evern, 1896; Rhinobatidae na Baía de Todos os Santos, BA. In ‘Reunião da Sociedade Brasileira para Estudo em Elasmobrânquios SBEEL 4. Caderno de Resumos’. pp. 165–166. (SBEEL: Recife, Brazil.)

Sandoval-Castillo, J., Mariano-Melendez, E., and Villavicencio-Garayzar, C. (2006). New records of albinism in two elasmobranchs: the tiger shark Galeocerdo cuvier and the giant electric ray Narcine entemedor. Cybium 30, 191–192.

Shapira, M. (2009). Stress effects on immunity in vertebrates and invertebrates. In ‘Stress – from Molecules to Behavior: a Comprehensive Analysis of the Neurobiology of Stress Responses’. (Eds: H. Soreq, A. Friedman and D. Kaufer.) pp. 207–227. (Wiley–VCH: Weinheim, Germany.)

Wagner, C. M., Rice, P. H., and Pease, A. P. (2013). First record of dicephalia in a bull shark Carcharhinus leucas (Chondrichthyes: Carcharhinidae) foetus from the Gulf of Mexico, USA. Journal of Fish Biology 82, 1419–1422.
First record of dicephalia in a bull shark Carcharhinus leucas (Chondrichthyes: Carcharhinidae) foetus from the Gulf of Mexico, USA.CrossRef | 1:STN:280:DC%2BC3srisF2gug%3D%3D&md5=eaa153a03331907946f7bab903f912a3CAS | 23557317PubMed |



Rent Article (via Deepdyve) Export Citation Cited By (2)

View Altmetrics