Vol. 36 No. 3, 1997
Budding Cycle and Bud Morphology of the Globe-shaped Sponge Cinachyra australiensis
Yung-Hui Chen1,*, Chang-Po Chen2 and Kun-Hsiung Chang2
1lnstitute of Marine Biology, National Sun Yat-sen University, Kaoshiung, Taiwan 804, R.O.C.
2lnstitute of Zoology, Academia Sinica, Taipei, Taiwan 115, R.O.C.
Yung-Hui Chen, Chang-Po Chen and Kun-Hsiung Chang (1997) Budding cycle and morphology of the globe-shaped sponge Cinachyra australiensis. Zoological Studies 36(3): 194-200. The asexual budding cycles of the globe-shaped sponge Cinachyra australiensis
(Carter, 1886) were studied from 1987 to 1989 in the rocky intertidal
area at Wanlitung, Hengchun Peninsula, southern Taiwan (22°00'N,
120°40'E). The small yellow buds are protruded by megascleres and are
scattered over the entire surface of adults. The budding period
generally started in late spring, peaked between late summer and early
fall, and ended in early winter. Detached buds are oval in shape and
negatively buoyant. Buds contain megascleres and microscleres similar
to those of adults. At the ultrastructural level, 4 principal cell
types can be identified within the buds: archaeocytes, special cells
with numerous small cell inclusions, oval-shaped cells, and
intermediate cells. The intermediate cells are characterized by
intermediate numbers of cell inclusions and phagosomes as in
archaeocytes and special cells. The oval-shaped cells are distributed
more peripherally within buds than are the other 3 cell types.
Key words: Asexual reproduction, Bud, Porifera, Ultrastructure.
*Correspondence: lnstitute of Marine Biology, National Sun Yat-sen University, Kaoshiung, Taiwan 804, R.O.C.