. The emigrations of animals from the sea. Animal ecology; Animal migration. Pools, Swamps, and Marshes 33 often subjected to extreme variations in temperature, salinity, essen- tial gases in the water, and in available water. In a South American tropical swamp Carter & Beadle (1930) found that fishes survived temperatures as high as 42 °C. during the middle of the day. The plankton animals died when temperatures reached 42° to 43 °C. and were thus often living near their limits of Fig. 5. A salt marsh in Colon, Panama. (Photo by R. H. Arnett, Jr As a small body of water evapo
. The emigrations of animals from the sea. Animal ecology; Animal migration. Pools, Swamps, and Marshes 33 often subjected to extreme variations in temperature, salinity, essen- tial gases in the water, and in available water. In a South American tropical swamp Carter & Beadle (1930) found that fishes survived temperatures as high as 42 °C. during the middle of the day. The plankton animals died when temperatures reached 42° to 43 °C. and were thus often living near their limits of Fig. 5. A salt marsh in Colon, Panama. (Photo by R. H. Arnett, Jr As a small body of water evaporates, its salinity may become very high. In Italy, Brighenti (1929) studied the animals in the Mesola salt marshes, which reached salinities as high as 41 grams per liter in summer but were nearly fresh in winter. He found a varied fauna which included ciliates (Tintinnidae) and foramini- ferans (Trochomorpha). In deeper water were many amphipods, isopods, clams, snails, bryozoans, anemones, and annelids. A few animals ranged from fresh water to the sea—shrimps, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Pearse, A. S. (Arthur Sperry), 1877-1956. Dryden, N. Y. , Sherwood Press
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