. Japanese goldfish, their varieties and cultivation; a practical guide to the Japanese methods of goldfish culture for amateurs and professionals. Goldfish. fungoused, and are protected from unfavorable weather conditions. Should hail threaten, a strong wind blow, or the air temperature fall suddenly, the ponds must be quickly covered with matting or screens. As a general thing, the hatching ponds receive and require no fresh water while incubation is in progress. It is sometimes desirable, however, to effect a change of water, particularly if the temperature becomes very high. The hatching p
. Japanese goldfish, their varieties and cultivation; a practical guide to the Japanese methods of goldfish culture for amateurs and professionals. Goldfish. fungoused, and are protected from unfavorable weather conditions. Should hail threaten, a strong wind blow, or the air temperature fall suddenly, the ponds must be quickly covered with matting or screens. As a general thing, the hatching ponds receive and require no fresh water while incubation is in progress. It is sometimes desirable, however, to effect a change of water, particularly if the temperature becomes very high. The hatching period is comparatively short, and normally occupies eight to nine days at a water temperature of 60 to 65°F. A rising temperature may reduce the hatching time as much as one- half, but a very rapid development of the eggs is unfavorable. On the other hand a fall in the water temperature may prolong the hatching one-third to one-half, but a greatly retarded incubation is likewise unfavorable, especially in that the young are not of uniform size. A peculiarity of the gold- fish egg is that the embryo covers nearly the entire circumference of the vitellus, and the yolksac is comparatively small and very 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 Smith, Hugh McCormick, 1865-1941. Washington, W. F. Roberts Company
Size: 1761px × 1418px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectgoldfis, bookyear1909
