. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 84 F. G. HALL. The methods for determining gases in water were similar to those described by Birge and Juday (1911). Many of the experi- ments were conducted in the field in order to study the fishes in their natural habitats. Samples were taken from a boat and although at first this seemed somewhat inconvenient, it was later found that little difficulty accompanied the operations. Temperatures, soundings, etc., were recorded at the time the experiments were FIG. i. Svvimbladder gas collecting tube. THE NORMAL CO
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 84 F. G. HALL. The methods for determining gases in water were similar to those described by Birge and Juday (1911). Many of the experi- ments were conducted in the field in order to study the fishes in their natural habitats. Samples were taken from a boat and although at first this seemed somewhat inconvenient, it was later found that little difficulty accompanied the operations. Temperatures, soundings, etc., were recorded at the time the experiments were FIG. i. Svvimbladder gas collecting tube. THE NORMAL COMPOSITION OF GASES IN THE SWIMBLADDER. It was of course important to know the normal composition of the gases in the swimbladders of the species under investigation. The gases vary with the species, with the dissolved gases in the surrounding media, with varying temperatures and pressures, and apparently with other factors that are not yet understood. Probably, also, the degree of salinity of the water, the season of the year, and the physiological condition of individual fishes (influenced directly or indirectly by factors already mentioned) act to produce variations in the composition of the gases found normally in the swimbladder of any pa'rticular 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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