Age at Maturity of the Pacific Coast Salmon of the Genus Oncorhynchus PDF Download
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Author: Charles Henry Gilbert
Publisher:
ISBN:
Category : Salmon
Languages : en
Pages : 14
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Author: Charles Henry Gilbert
Publisher:
ISBN:
Category : Salmon
Languages : en
Pages : 14
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Author: Charles Henry Gilbert
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 60
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Author: Charles Henry Gilbert
Publisher: Forgotten Books
ISBN: 9780265942918
Category :
Languages : en
Pages : 56
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Excerpt from Age at Maturity of the Pacific Coast Salmon of the Genus Oncorhynchus Three-year fish, or grilse, were not included in the above table. During the summer of 1911 they were not numerous. Only a few (perhaps three or four on the average) could usually be found in each fish brought in. It is the current belief among those who handle Fraser River sockeyes that all the grilse are male fish. As previously noted, all those examined by us were males, with one exception, a female with well-developed ova. Examina tion of the scales (see Pl. 1, Fig. 2) shows that the final summer's growth is more extensi1e in grilse than in those which mature at four and five years, and the narrowing of the marginal rings to form the third winter band has often begun. Much larger specimens than those included in the table were selected for examination in an attempt to find individuals older than five years. Several were found over 30 inches long. Weighing 12 lb. But all were five-year fish. Examination of a larger number may possibly bring to light's rare individual which has not matured until its sixth year. Even this is doubtful, and we assuredly do not anticipate finding older than six year individuals among the Fraser River sockeyes. 'lhe significance of the marking experiments of the Bureau of Fisheries in the Naha River, with the reported recovery of marked specimens up to nine years old, remains to be determined. 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.
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Author: British Columbia. Provincial Fisheries Department
Publisher:
ISBN: 9780665853876
Category : Pacific salmon
Languages : en
Pages : 70
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![Age at Maturity of the Pacific Coast Salmon of the Genus Oncorhynchus [microform] PDF](https://books.google.com/books/content/images/frontcover/6LuwzgEACAAJ?fife=w80-h100)
Author: Charles H (Charles Henry) Gilbert
Publisher: Legare Street Press
ISBN: 9781013641831
Category :
Languages : en
Pages : 60
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Book Description
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author:
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 458
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Author: United States. Bureau of Fisheries
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 940
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Author:
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 942
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Author: Adam Shortt
Publisher:
ISBN:
Category : Canada
Languages : en
Pages : 370
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 356
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