@article {83182, title = {A doubled down invasion of the northeast Pacific by the Asian mud shrimp, Upogebia major, and its coevolved bopyrid isopod parasite, Orthione griffenis}, journal = {Aquatic Invasions}, volume = {16}, number = {4}, year = {2021}, note = {The blue mud shrimp, Upogebia pugettensis, is known to be an ecosystem engineer, turning over and re-suspending, and aerating sediments (bioturbation), burrowing, and deposit feeding. The mud shrimp affects organic structure, nutrients, and the grain size of sediments in mudflats. Some of this activity creates difficulties for oyster growers, causing the application of pesticides in oyster growing areas in the 1950s. It may be that the changes in the ecosystem caused by introduced oysters and pesticides opened the doors for subsequent invasions. In 1999, a parasitic isopod was discovered to be infecting the native mud shrimp, and effectively sterilizing the shrimp. A related species, the Asian mud shrimp. Upogebia major, is less susceptible to the parasite, and has begun to fill in spaces formerly occupied by the blue mud shrimp. While this article is concerned with mud shrimp populations in California, the dynamics discussed are relevant to Oregon estuaries. If the ways our estuaries are engineered changes thanks to the double invasion, the way we manage our estuaries will also have to change. This is an open-access article, and it has also been re-printed as no.21-021 in the ORESU-R series.}, month = {2021}, pages = {p.721{\textendash}749}, keywords = {Alsea Bay, Asian mud shrimp Upogebia major, bioturbation, community ecology, Coos Bay, depleted populations, Griffen{\textquoteright}s isopod = Orthione griffensis, introduced species, Mud shrimp = Upogebia pugettensis, natural resource management, Nestucca Bay, Netarts Bay, Upogebia macginitieorum, Yaquina Bay}, doi = {https://doi.org/10.3391/ai.2021.16.4.09}, url = {https://ir.library.oregonstate.edu/concern/articles/k643b826b }, author = {Chapman, John W. and Li, Jingchun and McGowan, Michael F. and Breitenstein, Ralph A. and Appy, Ralph and Hieb, Kathryn A. and Piotrowski, Christina N. and Elder, Leanne E.} } @article {34531, title = {An introduced Asian parasite threatens northeastern Pacific estuarine ecosystems}, journal = {Biological Invasions}, volume = {14}, year = {2012}, note = {The non-indigenous isopod Orthione griffenis effectively castrates the mud shrimp Upogebia. The spread of the invasive parasite has dramatically depleted mud shrimp populations along the northwestern coast of North America. "All previously known abundant Upogebia populations were either absent or at greatly reduced abundances in all California, Oregon and Washington estuaries examined." (p.1225) "[U]rgent, immediate responses, including captive breeding programs for the most impacted Upogebia populations and species are warranted." (p.1234)}, pages = {p.1221-1236}, keywords = {Alsea Bay, bioturbation, Coos Bay, depleted populations, invasive species, Mud shrimp = Upogebia pugettensis, Netarts Bay, Orthione griffenis, parasites, Sand Lake, Siletz Bay, Tillamook Bay, Yaquina Bay}, doi = {10.1007/s10530-011-0151-3}, url = {https://ir.library.oregonstate.edu/concern/articles/nc580n174}, author = {Chapman, John W. and Dumbauld, Brett R. and Itani, Gyo and Markham, John C.} } @article {83286, title = {Is the collapse of mud shrimp (Upogebia pugettensis) populations along the Pacific Coast of North America caused by outbreaks of a previously unknown bopyrid isopod parasite (Orthione griffenis)?}, journal = {Estuaries and Coasts}, volume = {34}, number = {2}, year = {2011}, note = {{\textquotedblleft}A dramatic increase in prevalence of the recently discovered bopyrid isopod parasite, Orthione griffenis, likely introduced in the 1980s from Asia to the Pacific coast of North America, coincided with the 2002 collapse of a population of its burrowing mud shrimp host, Upogebia pugettensis, in Willapa Bay, Washington that had been stable since monitoring began in 1988. An examination of whether O. griffenis infections were sufficient to cause this decline and other recently noted U. pugettensis population collapses in Pacific Coast estuaries was conducted.{\textquotedblright} (from the Abstract)}, pages = {336-350}, keywords = {aquatic invertebrates, crustaceans, depleted populations, Idaho Flats, Mud shrimp = Upogebia pugettensis, Orthione griffenis, parasites, Tillamook Bay, Willapa Bay, Yaquina Bay}, doi = {10.1007/s12237-010-9316-z}, author = {Dumbauld, Brett R. and Chapman, John W. and Torchin, Mark E. and Kuris, Armand M.} }