File:Aquatic life (1918-1919) (19126280333).jpg

Title: Aquatic life
Identifier: aquaticlife419181919baus (find matches)
Year: 1918-1919 (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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86 Aquatic iLiU "driving." To the uninitiated one fish seems to be chasing and annoying the other. The pursuer is the male, to be further distinguished, on close examina- tion, by the presence of more or less prominent excrescences (white spots) on the gill-covers and along the first rays of the pectoral fins. The object of his attentions, especially when viewed from above, will appear broader across the back at the rear, one side perhaps more distended than the other, making the fish orgasm by removing and separating the fish should either show signs of exhaus- tion. While it is commonly said that the male assists in the extrusion of the eggs by bringing his body into more or less violent contact with the female, I am in- clined to voice dissent. His movements solely concern the ejection of the sperm and his desire to eject it where it will soonest meet the falling ova. In the ab- sence of a male, a female is well able and does rid herself of ripe ova. Many a
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Goldfish and Lilies in the Garden of Miss J. L. Cornwall lop-sided, this being due to the unequal development of the roes. When the at- tentions of the male become so constant as to make it appear that the female is being harassed, then spawning may be expected soon. The desired individuals should be placed in the tub previously prepared, if not already transferred be- fore this stage has been reached. The climax is reached during the early hours of the morning, and is usually fin- ished by noon, the period being deter- mined by the size and vigor of the par- ticipants. It is well to terminate the fancier has had this experience with a choice fish, to his sorrow. The eggs are expelled during the spasmodic rushes through the plants and adhere to them. When the action becomes desultory, the fish apparently nearing exhaustion, re- move the sexes to separate tanks to recu- perate. Within about twenty-four hours the unfertilized eggs will be attached by fungus and appear as tiny, white, fuzzy balls. Remove them with forceps, lest the infection spread to the fertile ones. (Continued on Page 96.)

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