Search for dissertations about: "chondrichthyes"
Found 3 swedish dissertations containing the word chondrichthyes.
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1. Evolution of Vertebrate Eyes: a study on lens suspension and optical proterties
Abstract : Many fishes have well-developed visual systems with color vision capabilities. The crystalline lens is the major refractive element in a fish eye since the cornea is optically inactive underwater. A typical fish eye has a large pupil and a lens of short focal length, features that increase light gathering ability. READ MORE
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2. Basal Vertebrate Divergences from a Molecular Perspective
Abstract : Fishes (Superclass Pisces) constitute the most numerous and morphologically diverse vertebrate group, yet only a small fraction of all molecular evolutionary studies concern piscine evolution. This thesis aims to investigate the vertebrate tree, through the analysis of mitochondrial (mt) DNA sequences. READ MORE
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3. Comparatative studies on the IGF system in vertebrates : studies in rats, and in bony, cartilaginous, and jawless fish
Abstract : Numerous studies have shown the importance of insulin-like growth factors (IGFs) for cellular growth, differentiation and metabolism in mammalian vertebrates. The mammalian IGF system, consists of IGF-1 and IGF-2, the IGF binding proteins (IGFBPs), and the type1 and type 2 IGF receptors. READ MORE