Egg Case (Chondrichthyes) - Relevance of Knowing Skate Egg Case Identification Features and Size

Relevance of Knowing Skate Egg Case Identification Features and Size

  • Knowledge of egg case morphology can be used to identify which skate species it belongs to, as well as aid in finding new skate species.
  • Researchers have been able to identify skate species, not previously known to reside in a geological area, by finding egg cases not belonging to all verified known species living within that region.
  • The presence of egg cases can assist researchers in gaining knowledge about skate distribution, behavior of the species and their preferred habitat, such as nursery areas.
  • These identification features aid in narrowing down the choice of the likely possible species, and in many cases makes it easier to accurately identify a species.
  • A mermaid's purse from a dogfish found on Trefor beach, North Wales

  • Empty mermaid's purse from a lesser spotted dogfish. Found on the shore at Anglesey

  • A Port Jackson shark's egg case. The screw-like helical flanges help the mother shark to secure the egg within rock crevices

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