St. Stephen Fish Lift

2010 - 2014 Numbers of Fish passed through the St. Stephen's Fish Lift

Common Name Scientific Name 2010 2011 2012 2013 2014
American Shad Alosa sapidissima
346,879
272,961
150,082
324,984
42,535
Blueback Herring Alosa aestivalis
217,750
336,210
37,117
113,860
171,200
Striped Mullet Mugil cephalus
708
6,016
266
4,437
470
Freshwater Catfish Ictalurus sp.
722
1,065
322
367
23
Striped Bass Morone saxitalis
2,760
1,640
1,488
90
111
Gizzard shad Dorosoma cepedianum
3,049
333
2
101
250
Largemouth Bass Micropterus salmoides
28
74
2
3
23
Longnose Gar Lepisoteus osseus
120
816
185
172
125
Atlantic Needlefish Strongylura marina
27
89
0
1
6
Sunfish Lepomis sp.
42
99
20
222
560
White Perch Morone americana Ctenopharyngodon idella / Cyprinus carpio
240
63
2
1
1
Carp carpio
423
172
30
8
2
Sea Lamprey Petromyzon marinus
0
0
0
0
0
Crappie Pomoxis sp.
0
12
1
3
3
Bowfin Amia calva
49
9
1
0
1
Hickory Shad Alosa mediocris
0
5
0
0
0
Total  
572,797
619,564
189,518
444,249
215,310

Fish passage through St. Stephen Fish Lift is variable from year-to-year. This variability is due to environmental factors (the amount of river flow, water temperature, and natural variations in population numbers) and man-made factors (construction and maintenance of the mechanics of the fish lift). From 2012-2014, the operating season was shortened due to major rehabilitation of the hydraulics and structural components of the Fish Lift.

Biologists use multi-year trends and averages to assess anadromous fish runs at St. Stephen Fish Lift to account for the many factors that affect fish passage.