Bulletin Of The United States Fish Commission Vol 6

Author : United States Fish Commission
Publisher : Forgotten Books
ISBN 13 : 9781333025861
Total Pages : 524 pages
Book Rating : 4.0/5 (258 download)

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Download or read book Bulletin of the United States Fish Commission, Vol. 6 written by United States Fish Commission and published by Forgotten Books. This book was released on 2016-07-04 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Bulletin of the United States Fish Commission, Vol. 6: For 1886 The ova of this fish are large, and measure 'from 5 to 54 millime ters in diameter. They are dirty yellow, almost amber colored, and adherent to the surfaces of submerged objects, especially the under Sides of bowlders, under which the parent'fish Seem to clear away the mud and thus form a retreat in which they may spawn. The ova are attached to the roof of the little retreat prepared by the adults, where the eggs are found spread over an area about as large as one's hand in a Single layer, hardly in contact with each other, and to the number of about 200. A discoidal area about 3 millimeters in diameter at the upper surface of each egg glues the latter firmly to the supporting surface (fig. Fertilization of the ova probably occurs at the time of their extrusion by the female, which, like the female catfish, manifests no further in tercet in her offspring. The male at once assumes the care of the brood, and seems to remain in the vicinity until the young fish are hatched out and set free. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.