Por Eckhard Witten & Carlos Sandoval

Por Eckhard Witten & Carlos Sandoval

By Eckhard Witten & Carlos Sandoval

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Deviations of the Vertebral Column

Among the deformations of the vertebral column in salmonids, are deviations of the axis. Axis deviations that can affect all regions of the vertebral column decrease the efficiency of swimming, the ability to acquire food and they can increase susceptibility to physiological imbalances. Curvatures of the of the vertebral column are diagnosed as lordosis (ventral curvature), kyphosis (dorsal curvature) and scoliosis (lateral curvature). The three types of deviations can develop individually or together. Although axis deviations are primarily diagnosed as bone pathologies, underlying causes are often unrelated to bone. Still, kyphosis and lordosis can lead to secondary bone alterations such…

Compression and Fusion of Vertebral Bodies

In salmonids the most common types of anomalies observed in the vertebral bodies are fusion (ankylosis) and compression, which can progress to the adjacent vertebral bodies, severely affecting the movement of the fish and making a reduction in fish length. There is an ongoing discussion about the causes for vertebral body compression and fusion. Hoever, compression-related tissue alterations are foremost alterations of the tissue in the intervertebral space rather than damages to the vertebral bodies themselves. Some authors propose that altered mechanical load (in the intervertebral spaces) could cause the transformation of intervertebral tissues (notochord and notochord sheath) into cartilaginous…