Title: Aquatic life
Identifier: aquaticlife219161917baus (find matches)
Year: 1916-1917 (1910s)
Authors: Bausman, Joseph E
Subjects: Aquariums; Fish culture
Publisher: Philadelphia : J. E. Bausman
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

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PROPAGATING DAPHNIA JOHN L. BENNINGTON
Text Appearing After Image:
AN ATTRACTIVE HOUSEHOLD AQUARIUM PhotogrElph by George H. Seip I I I i i When the subject of raising Daphne is broached, the goldfish breeder smiles merrily. From his viewpoint, it can't be done, he uses too vast a quantity. Now Daphne can be propagated, and in quan- tity, but not with the facilities possessed by the average city goldfish fancier. It is entirely a matter of adequate pond space and food. The Japanese do it, but they devote, in some cases, as much space as to the fish. This is considerable, be- cause a fish pond in Japan will sometimes have a surface area of more than 150 square yards! The food of Daphne is mainly the smaller green algae and diatoms. If these can be supplied we can breed it. In nature they reproduce rapidly, very rapidly, in fact, it has been calculated that the progeny of a single female Dahpnia piilex, in a period of sixty days, might number 13,000,000,000. This be- cause the young develop rapidly and are themselves soon producing eggs. Barring the Japanese, most articles dealing with Daphne breeding have been written by fanciers of exotic fishes. I know of no successful experiments that have yielded sufficient water-fleas to feed a thousand, yes, even a hundred, goldfish to an age of six months. It could be done, but not without large pond space. Various writers have in the past out- lined their methods of culture. Myers, starting in September, raised sufficient throughout the winter to supply a dozen goldfish with a liberal feed once a week. He used a twelve-gallon aquarium, in which he placed about a quart of Spiro- gyra and Cladophora (filamentous alga^. commonly called "frog-spit." These or allied species are usually abundant in swamp waters). These algae grew and furnished the young and old Daphne with abundant food. Brind advises the use of quart preserving jars, having a bottom of soil and containing bits of plants. A large number of jars are prepared, and tlie "bugs" used from them in rotation. Gage uses a porcelain-lined kitchen sink.

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