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Physical and Chemical Conditions in the Freshwater Circulation of the Zoological Society's Aquarium
Author(s) -
Stowell Flaxney Percival
Publication year - 1927
Publication title -
proceedings of the zoological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0370-2774
DOI - 10.1111/j.1096-3642.1927.tb02244.x
Subject(s) - seawater , chemical constituents , sewage , fish <actinopterygii> , fresh water , environmental chemistry , chemistry , environmental science , freshwater fish , evaporation , mineralogy , environmental engineering , ecology , fishery , biology , chromatography , geography , meteorology
S ummary .1 A physical and chemical investigation of t h e freshwater circulation in the Society's Aquarium has been carried ont, including a n estimation of t h e standards of purity, and small constituents siich as phosphate and silica, which in natural waters are seasonable and variable. 2 An analysis of the non‐volatile saline constituenta has also been undertaken. 3 point of view of the standards of purity, t h results reveal the normality of the water and its continued suitability as a healthy metlium for fish‐life. 4 Comparison with the same factors in the course of supply indicate an exact parallelism with the sea‐water circulation in trends tswnrd accumulation or depletion of constituents, and t h similar effects of the various methods of purification employed in both circulations. 5 A general concentration has taken place in the non‐volatile saline constituents, due to evaporation, with an abnormal increase in the concentrations of certain ions. This has been found to be due to solution of rock‐work lining the show‐tanks, slight and unavoidable admixture with sea‐water through diffusion in the containing reservoirs, and harmless oxidatim products of fish sewage metabolism. 6 Dangerous metallic constituents were absent.