Forage Fish Spawning Surveys
In conjunction with the Nearshore Restoration Project, the MRC has conducted pre- and post-restoration monitoring of forage fish spawning since 2011 at 13 locations within the project reach between Mukilteo and Everett. Forage fish species, including Pacific sand lance (Ammodytes hexaptarus), surf smelt (Hypomesus pretiosus), and Pacific herring (Clupea harengus), play a vital role in the marine food web by providing food for a variety of birds, mammals, and fish. Forage fish depend on the nearshore area for spawning and rearing. The MRC forage fish spawning surveys use Washington Department of Fish and Wildlife’s (WDFW) protocols focusing on two species, surf smelt and Pacific sand lance, which lay eggs on intertidal sand-gravel beaches in the nearshore environment. The results of the study will update forage fish spawning information for Snohomish County and effectiveness of restoration activities on forage fish spawning habitat. A report has been completed by Natural Resources Consultants evaluating the forage fish surveys associated with the nearshore project and is available for download here. Forage fish surveys are also completed at Meadowdale Beach and Picnic Point parks as part of baseline data collection for the county. One of the sites near Howarth Park is also part of a Puget Sound wide data collection effort led by WDFW.
For more information on forage fish, click here to view our forage fish factsheet.
Forage fish spawning surveys have been conducted each winter beginning in 2011 to look for the presence or absence of forage fish eggs. Surveys are conducted by MRC staff and citizen science volunteers and MRC members. All volunteers attend a training, typically led by WDFW staff. The spawning surveys protocol follows the Washington Department of Fish and Wildlife’s (WDFW) methodology for collecting and counting surf smelt and Pacific sand lance eggs within the project area. Sampling occurs monthly from October – February within the project area, along the shoreline between Everett and Mukilteo. Sampling is conducted along 13 fixed 100 foot long transects parallel to the water line.
Within two days of collection, the composite samples are wet-screened and 0.5mm-2mm egg sized material is retained. Through a process commonly referred to as winnowing, the screened samples are then placed in rectangular dishpans and winnowed to separate finer grained sediments, to which the forage fish eggs adhere, from coarser sediments. The resulting “winnowed light fraction” samples are preserved and delivered to a qualified scientist for laboratory analysis.