Distribution of Sabellaria vulgaris Verrill (Polychaeta: Sabellariidae) on a sandflat in Delaware Bay
Tóm tắt
The vertical distribution of the polychaete Sabellaria vulgaris Verrill and its sandgrain tube material was studied on a sandflat near the mouth of the Mispillion River in Delaware Bay. Numbers of live worms, and amounts of tube material were determined for 13 exposure time zones on the sandflat. Exposure zones were established according to measurements made during an extreme low-water spring tide. Numbers of live worms declined sharply above the 126–150-minute exposure zone. Almost no live worms were found above 175 minutes of exposure. The largest amount of tube (colony) material was found in the area characterized as the 101–150-minute exposure zone. There was less colony material both above and below this level on the sandflat. An explanation as to why the 101–150-minute exposure zone is optimal for tube construction is proposed, and a comparision with the zonation of Sabellaria alveolata in England is made.
Tài liệu tham khảo
CURTIS, L. A. 1973. Aspects of the life cycle of Sabellaria vulgaris Verrill (Polychaeta: Sabellariidae) in Delaware Bay. Ph.D. Dissertation, Univ. of Delaware. 236 p.
GRAM, R. 1968. A Florida Sabellariidae reef and its effect on sediment distribution. J. Sediment. Petrol. 38 (3): 863–868.
KIRTLEY, D. W. and W. F. TANNER. 1968. Sabellariid worms: Builders of a major reef type. J. Sediment. Petrol. 38 (1):73–78.
MULTER, H. G. and J. D. MILLIMAN. 1967. Geologic aspects of Sabellariidae reefs, Southeastern Florida. Bull. Mar. Sci. 17 (2): 257–267.
VERRILL, A. E., and S. I. SMITH 1874. Report upon the invertebrate animals of Vineyard Sound and adjacent waters, with an account of the physical characters of the region. Government Printing Office, Washington. 485 p.
WELLS, H. W. 1970 Sabellaria reef masses in Delaware Bay. Chesapeake Sci. 11 (4): 258–260.
WILSON, D. P. 1968. The settlement behavior of the larvae of Sabellaria alveolata (L.). J. Mar. Biol. Assn. U.K. 48:387–435.
— 1971. Sabellaria colonies at Duckpool, North Cornwall, 1961–1970. J. Mar. Biol. Assn. U.K. 51:509–580.