The sponge Halichondria okadai is one of the most common sponges in the intertidal zone in Peng-Hu, Taiwan. And their juveniles are found on the back side of rocks in the period of July to October. In the present study, changes of juvenile morphology with their growth and the contents of photoprotective materials were examined. In adults, the thickness of the black surface layer did not correlate with their surface area. In juveniles, changes of their color were not correlated with their surface area neither. In juveniles, the structure of the tissues in the mesoyl layer were looser than the surface layer and there were more black chromatocytes in the surface layer than the mesohyl layer. The compositions of spicules were different in various stages of the sponge. There were no spicules in embryos and larvae. In juveniles, microscleres were the main components. However, megascleres of oxea and strongyle were the major types in adult. When the juveniles exposed to different light treatments, their color changed gradually from white to black. In adults, the total contents of melanin were more in the surface layer than the mesoyl layer. And comparison, the contents of melanin were more in adults (0.074-0.115 mg/protein) than in juveniles (0.028-0.036 mg/protein).
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0916105-175117 |
| Date | 16 September 2005 |
| Creators | Liang, Chung-kai |
| Contributors | I-ming Chen, Li-lian Liu, none |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0916105-175117 |
| Rights | withheld, Copyright information available at source archive |
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