. American fish-culture [microform] : embracing all the details of artificial breeding and rearing of trout, the culture of salmon, shad and other fishes. Fish culture; Fishes; Oyster-culture; Pisciculture; Poissons; Ostréiculture. 32 FISH CULTURE. I will be much fall between the ponds, the water should dis- charge at each outlet into a box or pool, and flow through the race below in a gentle current. The water is thus aerated without creating a rapid, which is unfavorable to a spawning-ground. When ^e supply is small, the water in a pond may back half way up the race which feeds it. At the en
. American fish-culture [microform] : embracing all the details of artificial breeding and rearing of trout, the culture of salmon, shad and other fishes. Fish culture; Fishes; Oyster-culture; Pisciculture; Poissons; Ostréiculture. 32 FISH CULTURE. I will be much fall between the ponds, the water should dis- charge at each outlet into a box or pool, and flow through the race below in a gentle current. The water is thus aerated without creating a rapid, which is unfavorable to a spawning-ground. When ^e supply is small, the water in a pond may back half way up the race which feeds it. At the end of each raceway strips should be nailed perpen- dicularly against the board sides, one set on each side at the entrance into the pond, and another set three or four feet above, so that wire gratings can be slipped in to secure the spawners when they are driven from the race above. I would here impress on the beginner the necessity of not allowing toe rapid a stream in the raceways, or having the water shallow, or gravel in the ponds where they enter. If he does, the trout may find a more acceptable spawning- place in the upper part of the pond, even in broad sun- shine, than in the covered race above; and if he attempts to secure his spawners at the head of the pond with a seine, he will frighten back into deep water those that might, perhaps, enter the raceway. If the sides of the raceways are lined with boards, it will not only secure them from the effects of frost and prevent dirt from falling in, but will also be a protection against muskrats. A hundred feet of hemlock or third quality pine will cost but a trifle, and will line a raceway fifty feet long. This is also the most eff"ectual way of pro- tecting the sides of ponds from these pests. On perfectly level ground, however, if the water comes within a few inches or a foot of the top of the bank, there is no harbor. Please note that these images are extracted from scanned page images that may have been digitally
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectfishes, bookyear1868
