Seasonal Abundance and Occurrence of the Asian Isopod Synidotea laevidorsalis in Delaware Bay, USA
- First Online:
- 76 Downloads
In 1999 the marine isopod Synidotea laevidorsalis (Miers 1881), indigenous to the northwest Pacific, was first documented in Delaware Bay, USA. We monitored weekly recruitment of this isopod and several other motile species in the Maurice River, a tributary of Delaware Bay. A spatial survey was also conducted. Abundance of S. laevidorsalis varied seasonally but overwhelmingly dominated other co-occurring species by an order of magnitude or more throughout most of the year. Isopod abundance increased through the summer of 2004 and peaked in September, coincident with the passing of Hurricane Ivan. Field observations documented large populations, frequently associated with pilings and buoy lines, throughout Delaware Bay in salinities of 4 through 22 ppt. The dramatic abundance of this isopod indicates that there is considerable potential for altering community structure. This isopod has yet to be observed along the Atlantic Coast of New Jersey or in Chesapeake Bay, but it has been reported near Charleston, SC.
KeywordsAsian benthic Delaware Bay Hurricane Ivan invasion isopod New Jersey non-native Synidotea laevidorsalis
Delaware River Basin Commission
Haskin Shellfish Research Laboratory, Rutgers, The State University of New Jersey
New Jersey Department of Environmental Protection
salinity of water as measured in parts per thousand
United States Geological Survey
Unable to display preview. Download preview PDF.
- Bushek D, Lohrer AM and Hartman MJ (2004) Using the National Estuarine Research Reserve System as a platform to prevent and control invasions by exotic decapod crabs. NOAA Technical Report NA17OR2494, 30 pp.Google Scholar
- DRBC (2005a) The Delaware River Basin. Retrieved from http://www.state.nj.us/drbc/thedrb.htm on 17 June 2005
- DRBC (2005b) Delaware River Flow and Storage Data. Retrieved from http://www.state.nj.us/drbc/data.htm on 21 May 2005
- J Mees and N Fockedey, First record of Synidotea laevidorsalis (Miers, 1881) (Crustacea: Isopoda) in Europe (Gironde estuary, France). Hydrobiologia 264 (1993) 61-63Google Scholar
- W Moore, Description of a new Synidotea species (Crustacea: Isopods: Valvifera: Idoteidae) from Hawaii. Proceedings of the Biological Society of Washington 117 (2004) 76-87Google Scholar
- USGS (2005) Nonindigenous Aquatic Species Database. Retrieved from http://nas.er.usgs.gov on 21 May 2005.
- GL Ray, Invasive Animal Species in Marine and Estuarine Environments: Biology and Ecology. US Army Corps of Engineers. Vicksburg, MS: Engineer Research and Development Center (2005).Google Scholar
- Wasson K, Lohrer AM, Crawford M, and Rumrill S (2002) Non-Native Species In Our Nation’s Estuaries: A Framework For An Invasion Monitoring Program. NERRS Technical Report Series 2002: 1Google Scholar