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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50 Aquatic JLitt the female and their replacement by other two. In the fructification of the ova, as in the case with most oviparous fishes where they are gregarious and marriages com- munistic, the female discharges the germs of matter (ova) and the male the germs of life (sperm), scattering them at ran- dom among the most suitable weeds that are on the surface of the water, the males micropyle, and that must take place be- fore the ovum has found a lodgment on the weeds or elsewhere; therefore, there is no necessity for the females to be pressed by the males. Among the gregarious fish the males have no clasping fins, as is the case with some of the monogamous, or with some that are monogamous for one season only, especially those that are viviparous,
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TTae Autkor's Conservator)) always intermixing with the females. When these germs or cells of matter are once freed from the ovary, the male at once discharges the sperms or cells of life, which are microscopic. The cells of the ova and the cells of the sperm are rapidly churned up by the quick move- ments of the excited fish. This prevents them from at once adhering to the weeds (the eggs are glutinous). Each ovum receives one germ cell of life from the sperms through the little gateway, the such as Gambusia affinis. The males of the carp referred to by Darwin, as the breeding season ap- proaches, develop excrescences on the gill-covers and pectoral fins. The func- tion of these excrescences is wholly inde- pendent of the extrusion of the germ- cells, but serves a purpose that leads up to the maturity of the ova. That it is essential for two or more males to accom- uany a female to aid her to discharge her ova is not exactly the law of reproduc-

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