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Embryonic development and maternal–embryo relationships of the Portuguese dogfish Centroscymnus coelolepis
Moura, T.; Nunes, C.; Bandarra, N.; Gordo, L.S.; Figueiredo, I. (2011). Embryonic development and maternal–embryo relationships of the Portuguese dogfish Centroscymnus coelolepis. Mar. Biol. (Berl.) 158(2): 401-412. hdl.handle.net/10.1007/s00227-010-1568-4
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Moura, T.
  • Nunes, C.
  • Bandarra, N.
  • Gordo, L.S.
  • Figueiredo, I.

Abstract
    The embryonic development and the level of dependency of the embryos from the maternal organism were investigated for Centroscymnus coelolepis. During the development, there is a 22–32% loss of organic matter and gains of 95–122% and 29–46% on moisture and inorganic matter, respectively. Only 28–48% of the initial yolk energy is conserved in embryos, being the remaining used in catabolism. In late pregnancy, the epithelium thickness of uterine villi decreases and vascularity increases. Results suggest that only water and minerals are transferred from the mother to the embryos. Monounsaturated fatty acids are the main type of fatty acids representing 48% of the total yolk fatty acid content, followed by polyunsaturated (30%) and saturated fatty acids (18–21%).

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