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First Monitoring July 2023

Page history last edited by Mary.Ellsworth 5 months, 1 week ago


  ACBA Mussel Monitoring

  How much have the mussels grown in 3 months?            BACK to ACBA Mussels front page



Basket 1 Basket 2 Basket 3 Basket 4
mm gram mm gram mm gram mm gram
41.7 6.7   38.0 5.0  43.5  7.9  41.2  7.0 
Ave length Ave wt
41.1 mm 6.7 gm
3-mos mussel growth
9.1 mm 4.0 gm
22.2%   59.8%

No dead mussels.

nymph and tiny amphipoda
(shrimp) in the baskets







We found 3 baskets floating. Hopefully the 4th is there, sitting on the bottom.  We have a replacement basket to install today. 

The day was very warm, with on and off light showers.   

Volunteers from DC Strokes worked with Kyle.


Kyle Spears, Project Leader

Kyle used two poles with hooks to lift the

baskets up onto the seawall, and also to

wash and remove some of the sediments. 

(click the photo to view video)


Measuring ambient water temperature.

Water transparency was also measured, using a

secchi disk


Four baskets were brought up onto the seawall.  The tops

were taken off and debris was removed.  The debris

included trash, elodea water weed, and lots of sticks. 


Under all that debris are 250 Alewife Mussels


A small freshwater clam shell lay on top of basket #1


A muddy dragonfly nymph from one of the baskets

Yes - this tiny dragon is alive!





















These smart volunteers brought a CANOPY with them!  Made the 

rainy day more bearable


Working in teams, the volunteers measured length and weight of 

25% of the mussels in each basket. (25 out of 250 mussels)


Using calipers to measure mussel length


Weighing each mussel


Recording length and weight

Replacing basket covers and securing with reusable zip ties.  Third basket fr left is the replacement - we're hoping this one stays afloat 

 Four baskets in place again, tied together with ropes, and floating off the seawall.  The Mussel Team:  


 Next Quarterly Monitoring Session - October  

Bring paper towels, bucket

(The next measurements actually happened in December)

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