Artificial propagation of the shad and pike perch . , exposed to bright direct sunshine, hatch so rapidlythat the combined effort of the swarming mass of young fish willestablish sufficient current to draw some shells over into the receiving-tank. This may be modified by placing a screen between the jar andthe light. The shells under normal conditions remain and form acloud-like layer above the mass of working eggs. As they accumulatethey should be removed by shoving down the outlet-tube until up with the escaping water. A good plan is to draw severaljars in succession into a lar
Artificial propagation of the shad and pike perch . , exposed to bright direct sunshine, hatch so rapidlythat the combined effort of the swarming mass of young fish willestablish sufficient current to draw some shells over into the receiving-tank. This may be modified by placing a screen between the jar andthe light. The shells under normal conditions remain and form acloud-like layer above the mass of working eggs. As they accumulatethey should be removed by shoving down the outlet-tube until up with the escaping water. A good plan is to draw severaljars in succession into a large pan, whence any fish coming over withthe shells may be ladled into the receiving-tank. A remnant of eggs may be long in hatching, and they should bepoured into a large, clean, bright pan and exposed to bright sunlight,when they will hatch in five or ten minutes. If the connection of the jar must be broken, it is essential that therubber feed-tube does not drop down and siphon the eggs from the jar. Fish Manual. (To face page 140.) Plate 46. SSB.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashi, bookyear1903
