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Reproduction is the origination of new organisms from pre-existing
ones. Among more than 35 separated forms of reproduction including
several types of gamogony, parthenogenesis, agamogenesis, fission
and division, and plas motomy, the bisexual mode of reproduction
via fertilization provides genetic variability that allows species
to adapt quickly to competitive and constantly changing
environments. Several excellent reviews and books have been written
in the past to analyse the mechanisms of fertilization in different
eukaryotic species. During the last few years, however, renewed
attention has been paid to examining the process of oocyte
fertilization at the cellular/molecular level not only within a
single species/group but also through different phylogenetic
lineages. As a result of this effort, knowledge of the molecular
pathways used by oocytes and spermatozoa at fertilization has
increased, but still many ques tions remain to be answered. Being
aware of the necessity of providing an inte grated view of the
process of fertilization, this book has been entirely devoted to
reviewing the process of oocyte fertilization at the
cellular/molecular level in two different and separated groups of
eukaryotic organisms: protozoa and metazoan animals. The book is
organized into six sections dealing with oocyte fertilization in
protozoa, invertebrates, teleost fishes, amphibians, birds and
mammals. These sections are followed by a summary/concluding
chapter that provides a com parative overview of the process of
fertilization in these groups of eukaryotes."
This book offers the reader an integrated point of view of fertilization in the animal kingdom. As the research at the molecular and cellular level is scarce compared to the huge diversity of animal species, for each phylum or class representative species have been chosen. Each phylum/class begins with a general description of the sexual and asexual reproduction strategies of the respective species, followed by a description of the reproductive cycle as well as of its reproductive system. The main focus is on the cellular and molecular aspects of fertilization of all the selected representative species, and the book is fully illustrated with photographs and drawings to facilitate understanding.
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