. The Biological bulletin. Biology; Zoology; Marine biology. FEEDING AND OXYGEN UPTAKE 309 animal growth. Sea water flowed into the tank, circulated around the tank and flowed out at a drain in the center of the circle of rocks. Urchins were placed in the center of the circle and the following day their positions were recorded in rela- tion to the food. Those touching a non-food rock (control) were recorded as R. Those not touching any rock or food were recorded as 0. This was repeated on several days for each food with fresh urchins. The position of each rock was moved one place each day in t
. The Biological bulletin. Biology; Zoology; Marine biology. FEEDING AND OXYGEN UPTAKE 309 animal growth. Sea water flowed into the tank, circulated around the tank and flowed out at a drain in the center of the circle of rocks. Urchins were placed in the center of the circle and the following day their positions were recorded in rela- tion to the food. Those touching a non-food rock (control) were recorded as R. Those not touching any rock or food were recorded as 0. This was repeated on several days for each food with fresh urchins. The position of each rock was moved one place each day in the circle. MICROMETER ASSEMBLY. 3 WAY STOPCOCK -BALL AND SOCKET JOINT ==^^'—PROPELLOR Figure 1. Schematic drawing of modified Scholander volumetric respirometer. Before determining feeding rates urchins were maintained in aquaria two to three months and were ofifered an excess of rock infested with Cliona Imnpa. Feed- ing rate w^as determined in the laboratory on these individuals held in 950-cc. polyethylene cages. Weighed portions of rock infested with Cliona lampa were put into the cages and at the end of eight days the rock was reweighed (wet) and the amount eaten determined by differences between first and second weighings. Controls indicated that weight loss of rock during the experimental periods was not significant. Flow of sea water into aquaria was maintained in all feeding experiments at about two liters per 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectb, booksubjectzoology
