Compression and Fusion of Vertebrate Bodies in Fish – Histopathology

Vertebral compression. Masson's trichrome. Notochordal tissue is being replaced by chondrogenic tissue

Vertebral compression involves alterations of the growth plates, and is but one component of a range of changes with complex aetiology that result in spinal deformity. A striking feature of compressed salmon vertebrae is the coincidence of metaplastic synchondrosis and the shape alterations of the vertebral end plates, raising the possibility that either bone alterations induce the conversion of the notochord tissue or that changes of the notochord induce bone alterations. The current state of knowledge suggests the latter, since the notochord plays an important...

Compression and Fusion of Vertebrate Bodies in Fish – Radiology

Vertebrate Bodies Fusion

The most severe anomalies of the vertebrae are those that affect the vertebral body, such as fusion, compression and shape modifications, which, if many vertebrae are affected, can reduce the length of the fish. Conversely, anomalies that alter the vertebral arches and spines are considered mild, since they do not affect the external shape of the fish. It has been demonstrated in salmon that two ankylosed and compressed vertebrae can be remodeled into a single common, structured and jointed vertebra. The fusion of vertebral bodies...