Alien Marine Invertebrates of Hawaii

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BRYOZOAN Bugula neritina (Linnaeus, 1758) Brown bryozoan Phylum Ectoprocta Class Gymnolaemata Order Cheilostomata Family Bugulidae Photo by S. Davidson DESCRIPTION HABITAT Flexible bushy colonies, branching biserial, to about 10 Typically found in harbors and embayments, especially cm high. Color is purplish-brown. Zooids alternating, Pearl Harbor, intertidal to 5 m, attached to any avail- with the outer corner pointed, but not spined. No able hard substrate. avicularia, ovicell large, white, and globular (from Gordon & Mawatari, 1992). ov Individual colony of Bugula neritina (photo S. Davidson) DISTRIBUTION HAWAIIAN ISLANDS Throughout the main islands, in harbors, embayments, SEM of Bugula neritina, (ov) globular ovicell (from Gordon & Mawatari, 1992). and shallow reef areas. © Hawaii Biological Survey 2001 B-53 Bugula neritina NATIVE RANGE REMARKS Unknown, perhaps the Mediterranean A common fouling organism worldwide, reported from all seas except subarctic and subantarctic regions, this PRESENT DISTRIBUTION species is most likely a suite of very similar species. Worldwide in tropical and temperate seas It’s presence in Hawaii was first reported by MECHANISM OF INTRODUCTION Edmondson (1933). He noted that it was one of the Unintentional, most likely as fouling on ships’ hulls. most common fouling species in harbors and bays around Oahu. It has since been widely reported throughout the main Islands by a number of authors. IMPACT Recently, B. neritina has been a subject of a great deal Fouling organism. Ecological impact unstudied, likely of biochemical research. It is the source of a novel some competition for space with native species. chemical, bryostatin, which has been shown been effective against leukemia. There are three additional alien species of Bugula ECOLOGY reported in Hawaii; B. dentata, B. robusta, and B. (see Feeding and Reproduction for previous bryozoan stolonifera (Zabin, 1999). species) REFERENCES Edmondson, C.H. 1933. Reef and Shore Fauna of Hawaii. B.P. Bishop Museum Spec. Pub. 22. Gordon, D.P. and S.F. Mawatari. 1992. Atlas of marine- fouling Bryozoa of New Zealand ports and harbours. New Zealand Oceanographic Institute, Pub. 107: 1- 52. Zabin, C.J. 1999. New records of introduced fouling Bryozoa from Oahu, Hawaii. Occ. Pap. Bishop Mus. 59: 46-47. B-54 © Hawaii Biological Survey 2001.

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