. Biomonitoring program : standard operating procedures. Water quality bioassay; Freshwater biology. Figure 1. Minnow Cage Construction. Inner and outer sections of the minnow cages used in the field experiments are depicted. The outer section, which is used to slow the velocity of water passing over the inner cage, is made from an 1-liter, plastic soft drink bottle. Inner cages with minnows are placed inside the top section of the outer cage; the latter is pushed into the bottom section and held in place with elastic bands and paper clips. Inner cages are constructed from acrylic plastic tube
. Biomonitoring program : standard operating procedures. Water quality bioassay; Freshwater biology. Figure 1. Minnow Cage Construction. Inner and outer sections of the minnow cages used in the field experiments are depicted. The outer section, which is used to slow the velocity of water passing over the inner cage, is made from an 1-liter, plastic soft drink bottle. Inner cages with minnows are placed inside the top section of the outer cage; the latter is pushed into the bottom section and held in place with elastic bands and paper clips. Inner cages are constructed from acrylic plastic tube (plexiglass) and Nytex^ screen. The two halves of the inner cage are held together by elastic bands fitted over small plexiglass blocks which are glued to each half of the inner cage. A plexiglass sleeve is placed around the joint of the two halves to prohibit minnows from escaping should one of the elastics fail. Outer Cage. bottom top 7 elastic. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts. Division of Water Pollution Control. Technical Services Branch. Westborough, Mass. : Technical Services Branch, Massachusetts Division of Water Pollution, Dept. of Environmental Quality Engineering
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Keywords: ., bookcentury1900, bookcontributorum, booksubjectfreshwaterbiology
