BECAS
SAN MARTÍN AnalÍa AnahÍ
artículos
Título:
Postcranial axial skeletal pathology in Commerson?s dolphins (Cephalorhynchus c. commersonii) from Tierra del Fuego, Argentina
Autor/es:
SAN MARTÍN ANALÍA A.; DELLABIANCA NATALIA A; GIMENO EDUARDO; MARIE-FRANÇOISE VAN BRESSEM
Revista:
DISEASES OF AQUATIC ORGANISMS
Editorial:
INTER-RESEARCH
Referencias:
Lugar: Oldendorf/Luhe; Año: 2019
ISSN:
0177-5103
Resumen:
Though Commerson?s dolphin, Cephalorhynchus c. commersonii, are the small cetacean most frequently found stranded along the coast of Tierra del Fuego, Argentina, little is known about their pathologies. We examined the postcranial axial skeletal of 425 Commerson?s dolphins collected in the period 1974-2011 for the presence of macroscopic lesions. Miscellaneous lesions were detected in 107 (25.2%) of the specimens. Among them idiopathic hyperostosis was the most frequent pathology (73.8%), followed by spondyloarthropathy (40.2%). Traumata (25.2%), spondylitis (10.3%) and osteoarthritis (11.2%) occurred less frequently. The type of lesions was statistically associated with the region of the vertebral column. Thus, idiopathic hyperostosis occurred significantly more frequently in the lumbar vertebrae than in other parts of the vertebral column while spondyloarthropathy was more frequent in the thoracic and caudal vertebrae. Both conditions were predominantly seen in mature dolphins. Osteoarthritis affected the transverse processes of the thoracic vertebrae of six males, three females and three individuals of undetermined sex, all mature. Healed and unhealed fractures were observed in the ribs of 27 specimens and in the transverse processes of three others. Spondylitis of various degrees of severity affected the cervical, thoracic, lumbar and caudal regions of 11 individuals. Together these data indicate that bone lesions and traumata commonly occur in Commerson?s dolphins, likely causing pain and morbidity in severe cases