File:Aquatic life (1916-1917) (19558890880).jpg

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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20 <2lqnatic Hit the outlet of which has been carefully plugged. In it is placed an inch and one- half layer of rich loam, then a light sprinkling of dried sheep manure, cover- ing this with a half-inch of earth con- taining a fairly high percentage of clay. Ripe or old aquarium water is then added. The sink is filled liberally with
Text Appearing After Image:
Daphnia pulex (greatly enlarged) Original Drawing by Frank J. Myers any of the recognized aquarium plants. Several heads of lettuce, sun-dried and powdered, is sprinkled over the surface of the water. Then, after a few days, some Daphne is introduced and their multiplication commences. From time to time decayed plants such as will be re- moved from aquaria should be thrown in. Compared with goldfish, the tropical fishes are-rather small, and in conse- quence consume less. Any of the fore- going plans should provide enough for feeding tropicals, but only a tithe for a goldfish. The average breeder of the latter fish, if he has a fair number, will consider a Daphne-collecting trip a fail- ure unless he carries home a bulk equiva- lent to a teacup filled solid. To propa- gate enough to feed such a quantity daily would require a pond exceeding in area his home grounds. While this amount seems large, it must be remembered that the first rule of breeding is to keep the young "filled," and, further,, that a gold- fish in early life is capable of consuming daily a quantity of Daphne equal to its own bulk. The Japs, to propagate Daphne, will take a pond with an area of 150 yards or more. If the pool is over ten years old, five bushels of rice bran, soy lees or the excrement of man or horse are spread upon the bottom after it has been drained. This is exposed to the sun's rays for about a week, and then the water is replaced. If the pond is less than two years old double the c;uantity of fertilizer used. This metho;! would seem to be quite malodorous, and one to be avoided by the fancier who lives, as most do, in close proximity to fellow-men. In short, it would seem that the breeder of goldfish will do well to continue gathering Daphne in the ponds of the city "dumps," leaving its propa- gation to the tropical fish lover, whose de- mands are more easily met. Natural objects are being threatened with extinction in Italy, as elsewhere. A league has been formed, therefore, for the protection of the fauna and flon of the country, and of such geological and geographical features as are of scientific or esthetic interest. A zoologist, a botan- ist, a geologist, a geographer and an agriculturist are included on the execu- tive council.

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