Hiroshi Hamaya - A Woman Planting Rice (Toyama), 1957 / Aaron Siskind - Volcano 6, 1980
Sea Lamprey (or Petromyzon marinus) from Hammond Bay Biological Station - large eel-like fish are native to the Atlantic Ocean, but invaded the Great Lakes in the early 1900's after the Welland Canal - which bypasses Niagara Falls - was enlarged. Their numbers quickly exploded, and by 1940 had occupied all five of the Great Lakes.
There are several ways to control lampreys, and this small dam, with an attendant electrical barrier, is one of them. Sea Lamprey run up streams and rivers to spawn, and disrupting this part of their life cycle is one way to attempt to reduce their numbers. This barrier is along the Ocqueoc (Ok-quee-ok) River, not far from the biological station. A few years ago, researchers trapped about 26,000 lampreys below this dam, which gives an idea of the severity of the invasion. Sea Lamprey breed in scores of other Great Lakes tributaries.
There are several ways to control lampreys, and this small dam, with an attendant electrical barrier, is one of them. Sea Lamprey run up streams and rivers to spawn, and disrupting this part of their life cycle is one way to attempt to reduce their numbers. This barrier is along the Ocqueoc (Ok-quee-ok) River, not far from the biological station. A few years ago, researchers trapped about 26,000 lampreys below this dam, which gives an idea of the severity of the invasion. Sea Lamprey breed in scores of other Great Lakes tributaries.
Illustrations by David A Hardy for 'Space Voyager' magazine no 3, 1983