Specimen Information

Dreissena rostriformis bugensis
Dreissena rostriformis bugensis
(quagga mussel)
Mollusks-Bivalves
Exotic

Specimen ID1421483
GroupMollusks-Bivalves
GenusDreissena
Speciesrostriformis
Subspeciesbugensis
Common Namequagga mussel
StateCA
CountyLos Angeles
LocalitySan Gabriel River, (upper) below Morris Dam
Mapping AccuracyAccurate
HUC8 NameSan Gabriel
HUC8 Number18070106
Map
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Collection Day26
Collection Month10
Collection Year2017
Year AccuracyActual
Potential Pathwayaccidental water release
Statusunknown
CommentsQuagga mussel veligers from the Colorado River Aqueduct were released at this location for 12 days due to an unplanned operational issue. All of the flow was fully contained within the groundwater replenishment system and no waterbodies downstream, of this engineered facility were impacted. Monitoring of the multiple downstream locations has shown no veliger detections since the initial sightings on October 26 and 31, 2017.
Record TypeNAS sighting report
VerifierMetropolitan Water District of Southern California
Freshwater/MarineFreshwater


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Page Last Modified: Friday, February 03, 2017

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Citation information: U.S. Geological Survey. [2018]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [1/18/2018].

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