Dorsal fin in the white shark, Carcharodon carcharias: A dynamic stabilizer for fast swimming

@article{LinghamSoliar2005DorsalFI,
  title={Dorsal fin in the white shark, Carcharodon carcharias: A dynamic stabilizer for fast swimming},
  author={Theagarten Lingham‐Soliar},
  journal={Journal of Morphology},
  year={2005},
  volume={263}
}
Transverse sections of the skin in the dorsal fin of the white shark, Carcharodon carcharias, tiger shark, Galeocerdo cuvier, and spotted raggedtooth shark, Carcharias taurus, show large numbers of dermal fiber bundles, which extend from the body into the fin. [] Key Result The bundles are tightly grouped together in staggered formation (not arranged in a straight line or in rows). This arrangement of dermal fibers gives tensile strength without impeding fiber movement.
Caudal fin in the white shark, Carcharodon carcharias (Lamnidae): A dynamic propeller for fast, efficient swimming
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Overall, the anatomy and mechanics of the dorsal lobe of C. carcharias facilitate greater control of movement compared to the ventral lobe, and provides considerable potential for an elastic mechanism in the animal's swimming motions and consequently for energy conservation.
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TLDR
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A unique cross section through the skin of the dinosaur Psittacosaurus from China showing a complex fibre architecture
  • T. Lingham‐Soliar
  • Environmental Science, Geography
    Proceedings of the Royal Society B: Biological Sciences
  • 2008
TLDR
This paper reports on a unique preservation of soft tissues in the ventrolateral region of the plant-eating dinosaur Psittacosaurus from the Jehol biota of China, which includes multiple layers of collagenous fibres in excess of 25, among the highest recorded in vertebrates.
New findings reveal that the middle Triassic ichthyosaur Mixosaurus cornalianus is the oldest amniote with a dorsal fin.
Two excellently preserved specimens of Mixosaurus cornalianus from the Anisian layers of the Middle Triassic Formazione di Besano, with soft parts associated with well-articulated skeletal elements,
The incidence of bent dorsal fins in free‐ranging cetaceans
TLDR
The occurrence of bent dorsals could be influenced by a set of variables rather than by a single factor but, irrespective of the cause, it is suggested that it does not directly affect the animals' survivorship.
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