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Fishes Collected by Midwater Trawls During Two Cruises of the David Starr Jordan in the Northeastern Pacific Ocean, April-June and September-October, 1972 (Classic Reprint)


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Excerpt from Fishes Collected by Midwater Trawls During Two Cruises of the David Starr Jordan in the Northeastern Pacific Ocean, April-June and September-October, 1972 Comparison of the 1k and the MT trawls is complicated by the much larger mouth and mesh size of the latter. On 7210-jd, 16 sample pairs were taken. The MT trawls fished to an average depth of 430m and filtered an average of 1,045,500m3 of water whereas the 1k fished to an average depth of 234m and filtered an average of 9,830m3. The MT collected an average of fish per lom3 whereas the 1k collected an average of fish per 10m3. The smaller catch rate of the MT can be attributed to the escapement of small fish through the larger mesh. No relation was found between the number of fish collected by each trawl at the same station. In spite of the lower catch rate per volume of water filtered, the larger samples and larger sizes of fish collected by this net make it a valuable survey tool. 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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