. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. Fig. 69. Red Hybrids (Life sice) One of the most remarkable productions in hyljridization. On opposite page, number 3, is a small, deep-red fish. Ntiml)er 1 is greenish with some red mark- ings. This cross produces some reddish hyljrids, iilotched black. When the reddest of these females is bred to number 7, we get a magnificent, large red fish. It grows rapidly and becomes considerably larger than any of its progenitors. These hyljrids lired together throw a surprisingly h
. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. Fig. 69. Red Hybrids (Life sice) One of the most remarkable productions in hyljridization. On opposite page, number 3, is a small, deep-red fish. Ntiml)er 1 is greenish with some red mark- ings. This cross produces some reddish hyljrids, iilotched black. When the reddest of these females is bred to number 7, we get a magnificent, large red fish. It grows rapidly and becomes considerably larger than any of its progenitors. These hyljrids lired together throw a surprisingly high percentage of reds—well over half. In a few generations of selectixe Iireeding we should have a very fine strain of these beautiful fishes. Hybrids in fishes seem to be more fertile than in warm-blooded animals. The female (upper figure) was "ripe" when the photograph was made, shown by distended outline and by the dark spot near the vent. The possibilities of hybridization amrjng live-bearing fishes are not fully known, but the subject is receiving careful study. To be sure of known crosses it is best to place the two fishes together before sexual characteristics have developed. If the do not turn out right, one still has virgin fishes to cross with those from other experimental aquaria. A female imce impregnated is fertile for four lots of 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 Innes, William T. (William Thornton), 1874-1969. Philadelphia, Innes
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Keywords: ., bookauthorinneswil, bookcentury1900, bookdecade1920, bookyear1921
