From notochord to vertebral column: studies on Atlantic salmon (Salmo salar L.)
نویسنده
چکیده
..................................................................................................................... 5 List of publications ...................................................................................................... 7 General introduction ................................................................................................... 8 The notochord ......................................................................................................... 8 The concept of segmentation................................................................................ 12 Bone formation in the vertebral column................................................................. 15 Aims of the study .................................................................................................. 17 General discussion ................................................................................................... 18 Why study the salmon notochord? ........................................................................ 18 The chordoblasts – a weaver of collagen.............................................................. 18 What is the origin of the segmental pattern of the salmon vertebral column? ....... 20 Development of the vertebrae............................................................................... 22 Main conclusion .................................................................................................... 24 References ............................................................................................................... 25
منابع مشابه
Effect of feeding rate on nutrient digestibility in Atlantic salmon, Salmo salar L.
A digestibility trial was conducted to examine the effect of feeding rate on dry matter, gross energy, crude protein and phosphorus digestibility in Atlantic salmon (Salmo salar). Duplicate groups of fish were fed 0.25, 0.5, 0.75, 1.0, 1.25 and 1.9% BW/day. The faeces were collected by Guelph-type collectors for five successive days. Dry matter, protein and phosphorus digestibility’s were all s...
متن کاملCollagen type XI alpha1 may be involved in the structural plasticity of the vertebral column in Atlantic salmon (Salmo salar L.).
Atlantic salmon (Salmo salar L.) vertebral bone displays plasticity in structure, osteoid secretion and mineralization in response to photoperiod. Other properties of the vertebral bone, such as mineral content and mechanical strength, are also associated with common malformations in farmed Atlantic salmon. The biological mechanisms that underlie these changes in bone physiology are unknown, an...
متن کاملThe salmon vertebral body develops through mineralization of two preformed tissues that are encompassed by two layers of bone.
The teleost backbone consists of amphicoelous vertebrae and intervertebral ligaments, both of which include notochord-derived structures. On the basis of a sequential developmental study of the vertebral column of Atlantic salmon (Salmo salar L.) from the egg stage up to early fry stage (300-2500 day-degrees) we show that the vertebral body consists of four layers or compartments, two of which ...
متن کاملThe notochord in Atlantic salmon (Salmo salar L.) undergoes profound morphological and mechanical changes during development
We present the development of the notochord of the Atlantic salmon (Salmo salar L.), from early embryo to sexually mature fish. Over the salmon's lifespan, profound morphological changes occur. Cells and gross structures of the notochord reorganize twice. In the embryo, the volume of the notochord is dominated by large, vacuolated chordocytes; each cell can be modeled as a hydrostat organized i...
متن کاملHistopathological study of gills in experimentally amoebic gill disease (AGD) infected Atlantic salmon, Salmo salar, L.
Amoebic gill disease (AGD) is the most important parasitic disease of Atlantic salmon industry inAustralia. Atlantic salmon (Salmo salar) experimentally infected with Neoparamoeba sp. apparently showedAGD gross signs on the gill and an amoebic-associated gill pathology. Physico-chemical factors of waterduring the experiment were monitored regularly and were approximately constant (temperature: ...
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