TY - RPRT TI - The occurrence of the colonial ascidian Didemnum sp. on Georges Bank gravel habitat: ecological observations and potential effects on groundfish and scallop fisheries AU - P. C. Valentine AU - J.S. Collie AU - R.N. Reid AU - R. G. Asch AU - Vincent G. Guida AU - D.S. Blackwood PY - 2007 DO - 10.1016/j.jembe.2006.10.038 UR - https://pubs.usgs.gov/publication/70030137 ID - 70030137 ER -