Calcium and Phosphorus Contents, and Microstructure of Vertebrae in Rainbow Trout (Oncorhynchus mykiss) at Different Developmental Stages
The skeletal system of fish consists of the axial skeleton (skull, vertebral column, ribs, and intermuscular bones) and the appendicular skeleton, which are essential for behavioral and physiological functions such as locomotion, feeding, predator avoidance, and load-bearing. As for the vertebral co...
| Main Authors: | , , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English Chinese |
| Published: |
Science Press, PR China
2023
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| Subjects: | |
| Online Access: | https://doi.org/10.19663/j.issn2095-9869.20220507001 https://doaj.org/article/dc8bd61f4d8c4fbe8f435c205a8d64a8 |
| Summary: | The skeletal system of fish consists of the axial skeleton (skull, vertebral column, ribs, and intermuscular bones) and the appendicular skeleton, which are essential for behavioral and physiological functions such as locomotion, feeding, predator avoidance, and load-bearing. As for the vertebral column of teleosts, it is composed of many vertebrae connected from the head to the caudal base. The morphological characteristics of the vertebrae (such as the number and structure) vary among different fish species. These characters (especially the vertebrae number) provide an important basis for species identification. For instance, the number of vertebrae in Salmo salar is 57–60 (30 trunk vertebrae, 27–30 caudal vertebrae), while rainbow trout (Oncorhynchus mykiss) has a total of 63 vertebrae (including 33 trunk vertebrae and 30 caudal vertebrae), which can be used for species identification. Fish with a similar number of vertebrae require further skeletal morphological features to distinguish them. For instance, the three-dimensional structure of the same vertebra segment from 32 different teleost species (belonging to 10 different orders) were compared and analyzed using Micro-computed tomography (Micro-CT) scanning technology. The results showed that the lamellar trabeculae and its internal cavity structure on the spine differed between the species, suggesting that these structural characteristics can serve as additional evidence to classify and identify fish species. In addition, calcium (Ca) and phosphorus (P) are the most important mineral elements in a fish skeleton, and their contents vary among different fish. Therefore, there is potential to use the skeletal Ca and P contents in classifying and identifying fish and their life history characteristics.To examine the vertebrae number in O. mykiss, specimens of juvenile O. mykiss of body weight (1.27±0.21) g were cleaned and double-stained to obtain the whole skeletal image. A total of 63 vertebrae were identified, and all were completely ossified at this ... |
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