. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. Fig. 239. Red Hybrids (Life size) One of the most remarkable productions in hybridization. On opposite page, num- ber 3 is a small, deep-red fish. Number 1 is greenish with some red markings. This cross produces some reddish hybrids, blotched 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 hybrids bred together throw a surprisingly high percentage of reds—
. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. Fig. 239. Red Hybrids (Life size) One of the most remarkable productions in hybridization. On opposite page, num- ber 3 is a small, deep-red fish. Number 1 is greenish with some red markings. This cross produces some reddish hybrids, blotched 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 hybrids bred together throw a surprisingly high percentage of reds—well over half. In a few generations of selective breeding we should have a very fine strain of these beautiful fishes. Hybrids in fishes seem to be moderately fertile. The female (upper figure) was "ripe" when the photograph was made, shown by distended outline and by the dark spot near the vent, which is not so plain as in some of the more translucent fishes. The possibilities of hybridization among 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 sexes do not turn out right, one still has virgin fishes to cross with those from other experimental aquaria. A female once impregnated is fertile for four lots of young. Additional breeding habits page 242 (No. 18). 257. 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. New York, Halcyon house
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