Canadian Journal of Zoology back issues from February 2006:
Cell death in Porifera: molecular players in the game of apoptotic cell death in living fossils (1).
Feb 01, 2006; ... Abstract: Apoptosis represents the morphological manifestation of programmed cell death and, paradoxically at first sight, it is a prerequisite for metazoan life. Thus, apoptosis is responsible for the demise of cells during many physiological processes. It is also accountable for the ...
Palaeontology of sponges--a review (1).
Feb 01, 2006; ... Abstract: The fossil record of sponges is a very old one, and begins in the Precambrian, but is rather incomplete. Only those sponges with a rigid skeleton, i.e., Hexactinosida and Lychniscosida (both hexactinellids), lithistids (demosponges with desmas), and sponges with a massive ...
Embryogenesis and larval differentiation in sponges (1).
Feb 01, 2006; ... Abstract: Having descended from the first multicellular animals on earth, sponges are a key group in which to seek innovations that form the basis of the metazoan body plan, but sponges themselves have a body plan that is extremely difficult to reconcile with that of other animals. Adult ...
Physiology of coordination in sponges (1).
Feb 01, 2006; ... Abstract: All multicellular organisms need a means of communicating between cells and between regions of the body. The evolution of a nervous system, by the Cnidaria, provided a fast means of communication and enabled the colonization of rapidly changing environments. Sponges, the ...
Classification and phylogeny of Hexactinellida (Porifera) (1).
Feb 01, 2006; ... Abstract: Development of the present classification scheme of the class Hexactinellida was delayed because authors of the early species descriptions did not figure their specimens and few of them had access to compound microscopes necessary to visualize characters important in determining ...
The ecology of the sponge larva (1).
Feb 01, 2006; ... Abstract: The present work summarizes the progress attained in the study of sponge larval ecology since the state-of-the-art reviews performed in the 1970s and stresses the major weaknesses in our current understanding. Most available information on this subject comes from laboratory ...
Biology of the Porifera: cell culture (1,2,3).
Feb 01, 2006; ... Abstract: The discovery that dissociated sponge cells will reaggregate to form a functional organism was the basis for the establishment of sponge cell cultures that have been used as a model for the study of fundamental processes in developmental biology and immunology. More recent is the ...
Systematics and evolution of Demospongiae (1).
Feb 01, 2006; ... Abstract: Systematic and evolutionary studies of Demospongiae Sollas, 1885 are a very dynamic field of research. The scientific knowledge pertaining to Demospongiae systematics has been recently assembled in the collective book Systema Porifera. However, a general consensus among ...
Phylogeny and evolution of calcareous sponges (1).
Feb 01, 2006; ... Abstract: The most recent advances concerning the phylogeny and evolution of calcareous sponges (Calcarea or Calcispongia) are reviewed here, in the light of the history of taxonomy of the group and conceptions about its evolution, starting from Haeckel's works at the end of the 19th ...
Progress in sponge biology (1).(INTRODUCTION)
Feb 01, 2006; ... Abstract: This is an introduction to a set of reviews covering aspects of the systematics, phylogeny and evolution of extant and fossil sponges, sponge embryogenesis and reproductive biology, cell culture and cell death, coordination, ecology, and mineral skeletogenesis. Resume: ...
Ecological interactions of marine sponges (1).
Feb 01, 2006; ... Abstract: Sponges interact with most other organisms in marine systems as competitors, symbionts, hosts of symbionts, consumers, and prey. Considerable creative energy has been required to study and describe the amazing variety of sponge interactions, as sponges can hide symbionts deep ...
Mineral skeletogenesis in sponges (1).
Feb 01, 2006; ... Abstract: Sponges secrete a variety of mineral skeletons consisting of calcite, aragonite, and (or) amorphous silica that confer strength and protect them from physical perturbations. Calcification takes place in a solution of bicarbonate and calcium ions, which is supersaturated with ...
Foreword/Avant-propos.
Feb 01, 2006; ... The present series of reviews on the Biology of neglected groups: Porifera (sponges) is the sixth and the last on the biology of invertebrates. We are pleased to report that the past series have been well received by our readers because of the quality of reviews written by so many ...