The Age and Growth of Salmon and Trout in Norway : As Shown by Their Scales (Classic Reprint) Free Download


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Language: English
Format files: PDF, EPUB, TXT, DOC
The size of the: 983 KB
City - Country: United States
The author of the book: Knut Dahl
Edition: Forgotten Books
Date of issue: 27 Sep 2015
EAN: 1331940257
ISBN: 9781331940258

Full description of the book "The Age and Growth of Salmon and Trout in Norway : As Shown by Their Scales (Classic Reprint)":

Excerpt from The Age and Growth of Salmon and Trout in Norway: As Shown by Their Scales During the years 1898 - 1902, I carried out a series of investigations relating to the life-history of Salmon and Trout. The results were issued under the title of "orret og Unglaks" in 1902, and were afterwards published in English in the "Nyt Magasin for Naturvidenskaberne" B. 42, 1904, under the title of "A Study on Trout and Young Salmon." The main result of my numerous investigations and experiments was briefly this: that salmon of sizes between 16 cm. and 45 cm., or in other words salmon between the smolt PDF stage and the grilse stage, were practically not to be found in those waters in which our salmon fisheries were carried on, that is to say in the rivers and fjords and among the outer islands along the coast. What had generally been supposed to be immature salmon were really sea-trout. This I was able to prove by rearing small salmon in salt water until they attained the requisite sizes, when they were found to be different from fish which had previously been considered immature salmon, and further confirmation of this was obtained by catching and examining quantities ePub of sea-trout and showing that there were no small salmon among them. I finally succeeded in ascertaining that immature salmon, in an earlier stage than grilse, are caught in the mackerel nets along our south coast far out at sea, and this discovery I have subsequently been able to confirm by further instances, of which I gave a brief description in 1906 "Nyere oplysninger om Unglaks ogdens Opholdssteder," Norsk Fiskeritidende, 12te hefte, 1906. As a result of these discoveries, when the new law with reference to salmon-fishing was passed in 1905, regulations were made exempting seatrout fishing from certain restrictions, amongst others PDF the obligation of a minimum mesh in non-stationary appliances (seines and gill nets). These restrictions had previously rendered such sea-trout fishing all but illegal everywhere, and had merely been imposed with the object of protecting the immature salmon that were supposed to constitute a portion of the catches made by this mode of fishing for sea-trout. During the discussion on this law it was even proposed to do away with all restrictions as to size of mesh in the case of salmon also. About the Publisher Forgotten Books publishes hundreds of thousands of ePub 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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