Excerpt from Quantitative Survey of the Benthos of San Pedro Basin, Southern California, Vol. 1: Preliminary Results (Charts 1-2, Plate 1-7) This report outlines the preliminary results of a quantitative study of the marine animal populations in a limited area of southern California. The purpose of the project has been to conduct an intensive survey of the benthic invertebrate metazoan animals of San Pedro Basin, and to at tempt a reconstruction of the natural animal associations. Many of the physical features, including ...
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Excerpt from Quantitative Survey of the Benthos of San Pedro Basin, Southern California, Vol. 1: Preliminary Results (Charts 1-2, Plate 1-7) This report outlines the preliminary results of a quantitative study of the marine animal populations in a limited area of southern California. The purpose of the project has been to conduct an intensive survey of the benthic invertebrate metazoan animals of San Pedro Basin, and to at tempt a reconstruction of the natural animal associations. Many of the physical features, including temperature and salinity of the Basin, are known or are being investigated by the geologists and oceanographers of southern California. In time, therefore, the biological and physical data may be correlated and many features of distribution and abundance explained. Throughout the San Pedro Basin, measured samples have been taken at chosen intervals for more than two years (1952 to using a bottom sampling device that grabs a sizeable part of the sea bottom from any depth. The device is dropped as a plummet, presumably without obliquity; its measured descent is used to indicate depth to the bottom. The sample is hauled up and immediately deposited in a large tub that completely accommodates the contents of the grab, in as undisturbed a condition as possible. Two half-pint samples are removed and set aside for future physical studies. From the tub the material is transferred to a set of screens of selected sizes. Care is taken that the innumerable soft bodied animals remain as intact as possible. The screens, with mesh from coarse to fine, measuring to 24 meshes to the inch, sort out the animals and other particles; they are washed with seawater and preserved with a reagent (formalized seawater) to harden protoplasmic tissue. Finally the labeled samples are taken to the laboratory, where all subsequent work is done. Tyler Standard screens, with meshes to a fine of 32 to the inch, are used for further washing of the samples. They are sorted and analyzed, then transferred to 70% alcohol. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... 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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