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pro vyhledávání: '"Clas Lilja"'
Publikováno v:
Animal Biology. 63:33-46
The avian eggshell acts as the major source of calcium for embryogenesis in bird. Using scanning electron microscopy, the inner eggshell surface was analysed before and after embryonic development and its accompanying calcium removal. This was done i
Autor:
Ola Karlsson, Clas Lilja
Publikováno v:
Zoology. 111:494-502
The shell of an egg contributes to successful embryogenesis in many ways, such as through protection, respiration and water exchange. The shell is also the major source of calcium for the development of high-calcium consuming organs, e.g. the skeleto
Autor:
Clas Lilja, Jonas Blom
Publikováno v:
Journal of Zoology. 262:361-369
Some studies of birds suggest that the development of the skeleton may invoke a constraint on the rate of postnatal growth. Other studies have shown that the eggshell is the major source of calcium for skeletal development of the embryo. To test whet
Autor:
Clas Lilja, Jonas Blom
Publikováno v:
Zoology (Jena, Germany). 108(2)
Some studies show that birds with high postnatal growth rates (e.g. altricial species) are characterized by a rapid early development of “supply” organs, such as digestive organs. Birds with low postnatal growth rates (e.g. precocial species) exh
Publikováno v:
Zoology (Jena, Germany). 104(2)
Summary Patterns of early embryonic development have traditionally been viewed as invariant within vertebrate taxa. It has been argued that the specific differences which are found arise during the later stages of development. These differences may b