Ca, P and Collagen Fibrils Period Measurements in the Vertebras of Lordotic Sparus aurata

摘要

Skeletal deformities of Gilthead seabream (Sparus aurata) is a major factor that effects the production cost, the external morphology of the fish as well as its survival and growth. Adult individuals of S. aurata were collected from a commercial fish farm and were divided into two groups. One with the presence of lordosis and one without any skeletal deformity. Fishes X-rayed and vertebras were taken from the site of the vertebra column that the lordosis occurred. One part was decalcified and prepared for collagen examination with transmission electron microscope and the rest incinerated and Ca and P contents were measured. The stoichiometries of the samples were obtained by EDS. The same procedure was followed for fish without any skeletal deformity (vertebras were taken from the middle part of the vertebra column). The decalcified vertebras parts examined with TEM, collagen micrographs were taken and the fibrils' period was measured. Statistics revealed no significant difference for both Ca and P or the collagen fibrils' period between the two fish groups.