Patterns description of hyperostosis observed in Atlantic moonfish Selene setapinnis and lookdown Selene vomer

Abstract

Hyperostosis manifests itself and develops differently in taxonomically related species. Radiographic images of individuals belonging to different size classes of Atlantic Moonfish Selene setapinnis and Lookdown Selene vomer were obtained from two different estuarine areas of Rio de Janeiro/Brazil. In S. setapinnis, hyperostosis occurred in 65.22% of the specimens analyzed in three different skeletal regions. All specimens of S. vomer had hyperostosis in four regions. Patterns of occurrence were detected in both species, and the affected regions did not coincide in the same bone region, except for the cleithrum. Hyperostosis in S. setapinnis were observed in high frequencies of seventh dorsal pterygiophore, whereas in specimens of S. vomer this condition was detected to a greater extent in the neural spines of the second abdominal vertebra and first to third caudal vertebrae. The data demonstrated a relationship between the sexual maturity and the occurrence and development of hyperostotic bones in ageing process of individuals. It is the first description of S. vomer with a hyperostosis phenomenon for the species on the Brazilian coast.

Patterns of hyperostosis during the ontogenic development of Atlantic spadefish (Broussonet, 1782) in Brazilian coast

“…found in individuals of Trichiurus lepturus Linnaeus, 1758, a predominance of the condition in neural spines compared to hemal spines James (1960). observed more affected hemal spines in the same species Tuna et al (2023). demonstrated specific ontogenetic patterns for two different species of the genus Selene Lacepède, 1802 from Brazilian waters.…”

“…Tuna et al. (2023) demonstrated specific ontogenetic patterns for two different species of the genus Selene Lacepède, 1802 from Brazilian waters. The difference in affected bone regions suggests that both environmental and genetic factors, even among different population behaviours of the same species, might influence the development of hyperostosis and the specific skeletal regions it affects.…”