. Contributions from the Bermuda Biological Station for Research. Biology -- Research. RHEOTROPIC RESPONSES OF EPINEPHELUS STRIATUS 439 While engaged in a study of the reactions of this fish, in connection with certain work on its central nervous system, I made use of an ap- paratus of the following nature: In a large spawning trough (fig. I, A), such as is used in fish hatcheries, I suspended by two supports (B, B) a cage (D), about 36 inches long by 18 inches wide and 10 or 12 inches deep, made of galvanized "chicken ; A current of fresh sea water was introduced at one end of
. Contributions from the Bermuda Biological Station for Research. Biology -- Research. RHEOTROPIC RESPONSES OF EPINEPHELUS STRIATUS 439 While engaged in a study of the reactions of this fish, in connection with certain work on its central nervous system, I made use of an ap- paratus of the following nature: In a large spawning trough (fig. I, A), such as is used in fish hatcheries, I suspended by two supports (B, B) a cage (D), about 36 inches long by 18 inches wide and 10 or 12 inches deep, made of galvanized "chicken ; A current of fresh sea water was introduced at one end of the cage, at an angle of about 30° with the horizon, by a 1-inch hose pipe, for the purpose of affording a B D i. 4. D li Fig. 1. Diagram of cage as seen from above. A, Large spawning trough; B, rods supporting cage; C, current of spawning trough; C", additional currents from hose pipe; D, wire cage suspended from B. better supply of water than was furnished by the sluggish current of the trough, flowing in the same direction. When several normal fishes had been put in the cage for temporary storage, it was noticed that their orientation was no longer promis- cuous, as in quiet water, but that an unusual position was assumed by nearly all of them (fig. 1). The cause of this was not at once appar- ent; but a little experimentation showed that the new orientation was in response to the stimulus of the seawater delivered through the hose pipe. Contraiy to the usual rheotropic response of fishes, they had. 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 Bermuda Biological Station for Research. Cambridge, Mass. : [s. n. ]
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1910, bookyear1917
