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Fish Hatcheries -- Equipment and Supplies
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Freshwater and Marine ...
Gooding, R. E.
Rogers, E. I.
Grace, J. E.
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Side view of tipping box and frame
One compartment of hatching tank, with box hinged in position, seen from above
Side view of hatching tank, showing two boxes in position, with oscillating bar raised
Hatching tank...seen from above
Sectional view of filter box
Siphoning device for floor aquaria at Luc-sur-Mer, shown in section:
a, wall of aquarium; b, cana through wall; c, codk; d, perforated lead-bulb (removable); e, standpipe for surface overflow; f, siphon; g, air valve, with scres; h, outlet into floor channel
Anthony's Turbot Rearing Tank, for the Experimental Hatching of the Turbot
Box of trout eggs just opened. Showing ice hopper at left, stack of trans which have been taken out of the moss at center of box, and one tray with covering of mosquito net and moss removed. This is the common method of packing for ordinary shipments
Equipment of McDonald automatic tidal boxes, for hatching cod, Boothbay Harbor, Me. Shows boxes lifted out of troughs and bottom upward on farther tables. The bottom is of scrim, and by means of cleats is held 1 1/2 inches above the bottom of the trough at the center. By an arrangement of partitions at the head of the trough the eggs receive the supply of water through the scrim bottoms of the boxes, also through a small hole in one end of the box. The distinctive feature of the apparatus, whence it is called 'tidal,' is the automatic siphon outflow, by menas of which the water is alternately drawn down and replenished. Standpipe with siphon cap is shown near troughs; waste trough below
Tray of trout eggs in hatching trough. The fry fall or work through the rectangular mesh of the tray bottom into the trough, where they are visible at the left of this picture. Tray is wedged at proper depth in trough during the incubation, and, for convenience in removing dead eggs from time to time, may be floated by releasing the wedges
Downing jars set up for use on 'battery' at Put-in Bay station, Ohio. The troughs into which the water flow from the pitcher mouth of the jars serve also to supply the jars in the next tier, by means of the wooden faucets, and there is a small overflow at alternate ends of each trough. This is the common equipment for hatching whitefish and pike perch
Hatching equipment for shad and other semibuoyant eggs. Over the inner ends of the tubes which serve as outlet for the aquarium is an elongate wire frame, screened with cheese cloth, for white perch and other very small fry, with wire cloth for shad. The jar at the right (Downing pattern) is here used, as might be any other open vessel, to maintain the desired water level in the aquarium, the outlet tubes siphoning directly into this. The scale attched to the jar (McDonald universal) in the center of the picture is [a] measuring device....
Tubs for Carrying Pike Perch to Stripping House. Constantia
Pike Perch Eggs in Jars. Constantia, 1912
Constantia Hatchery. Jars for Hatching Pike-Perch
Main deck of steamer Fish Hawk, showing arrangement of McDonald automatic jars for hatching shad
Eccentric wheel providing circulation of water in hatching boxes. Flodevig, Norway
Egg collector used at Flodevig, Norway
Tray of trout eggs with mosquito net and moss in which packed
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