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Introduction to zoology; a guide to the study of animals, for the use of secondary schools; Year: 1900 (1900s) Authors: Davenport, Charles Benedict, 1866-1944 Davenport, Gertrude Anna Crotty, 1866- Subjects: Zoology Publisher: New York, Macmillan company

509.39224763.580x360

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Gasterosteus bispinosus (=G. aculeatus) nest and male Identifier: introductiontozo00dave Title: Introduction to zoology; a guide to the study of animals, for the use of secondary schools; Year: 1900 (1900s) Authors: Davenport, Charles Benedict, 1866-1944 Davenport, Gertrude Anna Crotty, 1866- Subjects: Zoology Publisher: New York, Macmillan company London, Macmillian and co., ltd. Contributing Library: MBLWHOI Library Digitizing Sponsor: MBLWHOI Library
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Text Appearing Before Image: ' Text Appearing After Image: FIG. 220. — Gasterostea.s bispinvaux, the two-spined stickleback. Above, nestwith eggs, and male entering. Below, male depositing its mil on the eggs. Figs. 219 and 220 are reproductions of water-color paintings in the Museumof Comparative Zoology at Harvard College. the species the male builds an elaborate nest from bits ofaquatic plants, firmly united by a special mucilaginoussecretion. The nest, which is built among the plants ofthe stream, consists of a short cylinder, through the hori- THE SMELT AND ITS ALLIES 239 zontal cavity of which the fish can lie while it deposits itseggs. The male is polygamous, and guards the singlenest, which receives the eggs from various females (Figs.219, 220). The codfishes, among the most important of food fishes,are characterized by having ventral fins without spines,and articulated fin-rays, well-developed caudal fin, isocercaltail, and barbel on chin. Our common codfish (Fig. 221)
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