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Diseases of Aquatic Organisms

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DAO 136:273-278 (2019)  -  DOI: https://doi.org/10.3354/dao03418

NOTE
Persistent Müllerian duct syndrome in a beluga whale Delphinapterus leucas

Raphaela Stimmelmayr1,2,*, Tatiana Ferrer3, David S. Rotstein4

1Department of Wildlife Management, North Slope Borough, Utqiagvik, AK 99723, USA
2Institute of Arctic Biology, University of Alaska Fairbanks, 757000, Fairbanks, AK 99775-70, USA
3Harbor Branch Oceanographic Institute, Florida Atlantic University, Fort Pierce, FL 34946, USA
4Marine Mammal Pathology Services, Olney, MD 20832, USA
*Corresponding author:

ABSTRACT: This case study describes a persistent Müllerian duct syndrome (PMDS), a rare form of XY disorder of sex development (DSD), in a mature (>15 yr) beluga whale Delphinapterus leucas. The phenotypically and genetically male beluga whale had both Müllerian (paramesonephric) and Wolffian (mesonephric) duct derivatives. A mild hydrometra was present. Gross and histological analyses indicated the testes were atrophied. Histopathologic findings in the testes also included fibrosis in addition to ductus deferens ductular dilation, epididymal ductular dilation, lymphoplasmacytic balanitis, uterine glandular atrophy, and endometrial fibrosis. DSDs are rarely reported in cetaceans, and PMDS has never been described in a cetacean.


KEY WORDS: Beluga whale · Delphinapterus leucas · Developmental sex disorder · Anti-Müllerian hormone · AMH · AMH receptor · Persistent Müllerian duct syndrome


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Cite this article as: Stimmelmayr R, Ferrer T, Rotstein DS (2019) Persistent Müllerian duct syndrome in a beluga whale Delphinapterus leucas. Dis Aquat Org 136:273-278. https://doi.org/10.3354/dao03418

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