Operational Plan for the Restoration of Diadromous Fishes to the ...

powerhouse), rock weir/chevron/resting pools, channel banks, and sequence of
construction.
Appendix C
Simplified spatial and temporal overlap of diadromous fishes in the Penobscot River
ecosystem, where arrows represent peak activity periods.
In many cases, movement patterns may be quite complex: for example, adult
salmon may enter the river as early as April with a peak in June, dwindling off at the
end of June and then another group of adults may move in beginning in August with
a peak in September. Shown are rainbow smelt (Osmerus mordax), American eel
(Anguilla rostrata), alewife (Alosa pseudoharengus), sea lamprey (Petromyzon
marinus), blueback herring (Alosa aestivalis), American shad (Alosa sapidissima),
and Atlantic salmon (Salmo salar). Not shown are shortnose sturgeon (Acipenser
brevirostrum), Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus), brook trout
(Salvelinus fontinalis), Atlantic tomcod (Microgadus tomcod), and striped bass
(Morone saxatilis), which would have spawned in the lower Penobscot River, below
the first set of falls in Milford, Maine. YOY = young-of-year. Figure modified from
Saunders et al. (2006) and information in Collette and Klein-MacPhee (2002).
(Information copied from page 63 of the Strategic Plan for the Restoration of
Diadromous Fishes to the Penobscot River prepared by Maine Department of
Marine Resources and the Maine Department of Inland Fisheries and Wildlife [March
2008])
PRFP Page 289