. The American angler's book : embracing the natural history of sporting fish, and the art of taking them : with instructions in fly-fishing, fly-making, and rod-making, and directions for fish-breeding : to which is appended, Dies piscatori, describing noted fishing-places, and the pleasure of solitary fly-fishing : illustrated with eighty engravings on wood. Fishing; Fishes. FISH-BREEDING. 471 been hatched; others on the contrary, such as the Salmon and the Trout, weighed down by their enormous umbilical bladder (figure 2), can only move with great difficulty, and remain lying on one side, o
. The American angler's book : embracing the natural history of sporting fish, and the art of taking them : with instructions in fly-fishing, fly-making, and rod-making, and directions for fish-breeding : to which is appended, Dies piscatori, describing noted fishing-places, and the pleasure of solitary fly-fishing : illustrated with eighty engravings on wood. Fishing; Fishes. FISH-BREEDING. 471 been hatched; others on the contrary, such as the Salmon and the Trout, weighed down by their enormous umbilical bladder (figure 2), can only move with great difficulty, and remain lying on one side, or even on the bladder itself. Some few attempt to move from one place to another, but soon give up the " The time for hatching is not the same with all species. Some, like the Pike, hatch at the end of eight, ten, or fifteen days; others, like the Salmon, take from a month and a half to two months. " Besides development is more or less hastened, according as the temperature of the water in which they are laid is more or less elevated. Pike's eggs placed in a vase, the water of which without being renewed was exposed to the sun's rays, hatched in nine days; while others of the same spawning, placed in the shade in water constantly renewed took eighteen to twenty days to hatch. It required also twenty days to hatch eggs of the ombre, which, more favorably placed, hatched in twelve to fifteen days. Still greater variations of time appear in the incubation of other species of the Salmon family. In running water of a warm temperature, the eggs of Salmon and Trout will hatch in about thirty days, while the same eggs in a cold stream will take seven or eight weeks. The term of incubation may even extend to a hun- dred and ten days, as was proved by the experiments made in. 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 rese
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Keywords: ., bookcentury1800, bookdecad, booksubjectfishes, booksubjectfishing
