paraschistura prokofiev, 2009 is a newly described genus based on osteological characters, but detailed information for all species of the genus is not available. to describe osteological characteristics of the endemic species of paraschistura nielseni , twelve specimens were collected from the shapur river of persis basin which drains to the persian gulf and their osteological characteristics ...

The method of staining bones is considered as one of the adopted means in studying the tissues and bones as well as the organs by which a comparison between fish species can be made as of Potthoff (Potthoff, 1984). The main objective of this study is to identify the tissue and skeleton differences between some species of fish which can enhance the taxonomic studies other than the taxonomic diff...

This review discusses the suitability and advantages of teleost fish for studying underlying mechanisms of normal and pathological development and mineralization of vertebrate skeleton, presents a selection of zebrafish mutants and transgenic lines modeling human skeletal diseases and highlights currently available fish systems for identifying and characterizing novel osteogenic and osteotoxic ...

Elasmobranchs, particularly sharks, function at speed and size extremes, exerting large forces on their cartilaginous skeletons while swimming. This casts doubt on the generalization that cartilaginous skeletons are mechanically inferior to bony skeletons, a proposition that has never been experimentally verified. We tested mineralized vertebral centra from seven species of elasmobranch fishes:...

The vertebral column is a key component of the jawed vertebrate (gnathostome) body plan, but the primitive embryonic origin of this skeleton remains unclear. In tetrapods, all vertebral components (neural arches, haemal arches and centra) derive from paraxial mesoderm (somites). However, in teleost fishes, vertebrae have a dual embryonic origin, with arches derived from somites, but centra form...

The vertebrate mineralized skeleton is known to have first emerged as an exoskeleton that extensively covered the fossil jawless fish. The evolutionary origin of this exoskeleton has long been attributed to the emergence of the neural crest, but experimental evaluation for this is still poor. Here we determine the embryonic origin of scales and fin rays of medaka (teleost trunk exoskeletons) by...

The marine economy has become a new growth point of the national economy, and many countries have started to implement ranch project made strategic industry support vigorously. In fact, with continuous improvement people’s living standards, market demand for precious seafood such as fish, sea cucumbers, urchins increases. Shallow aquaculture extensively promoted vigorous development fisheries. ...

Natural or synthetic hydroxyapatite (HA) has been frequently used as implant materials for orthopaedic and dental applications, showing excellent bioactivity, adequate mechanical rigidity and structure, osteoconductivity and angiogenic properties, no toxicity, and absence of inflammatory or antigenic reactions. HA can be easily synthesized or extracted from natural sources, such as bovine bone....

Certain fish are very rich sources of vitamin D as compared to most of the higher vertebrates which have insignificant amounts of this vitamin. Not only the teleosts, which possess a calcified skeleton, but also the elasmobranchs, which lack calcified skeleton, contain extremely high concentrations of this vitamin, leading to the speculation that the function of vitamin D in fish may be differe...

Cementoblastomas are rare odontogenic tumors developing in close proximity to the roots of teeth. Due their striking morphologic resemblance osteoblastomas peripheral skeleton, we set out determine whether cementoblastomas harbor same FOS rearrangements with overexpression c-FOS as has recently been described for osteoblastomas. In total, 16 were analyzed expression by immunohistochemistry and ...