. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MAINTENANCE OF ADULT SQUID 281 (A). FIGURE 1. (a.) Configuration of the aquarium system. 1, shows the aquarium; 2, central cylinder which prevents squid movement in a radial direction and also serves as a container for filtering stage IOC; 3, activated charcoal filter; 4, filtering stage 10A; 5, dirt trap; 6, control box for circulation pump and temperature control unit; 7, air huhbler; 8, overflow from filter IOC; 9, seawater outlet; 10A, 10B, and IOC, three filtering stages, (b.) Circulation pattern of sea water in the aqu
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MAINTENANCE OF ADULT SQUID 281 (A). FIGURE 1. (a.) Configuration of the aquarium system. 1, shows the aquarium; 2, central cylinder which prevents squid movement in a radial direction and also serves as a container for filtering stage IOC; 3, activated charcoal filter; 4, filtering stage 10A; 5, dirt trap; 6, control box for circulation pump and temperature control unit; 7, air huhbler; 8, overflow from filter IOC; 9, seawater outlet; 10A, 10B, and IOC, three filtering stages, (b.) Circulation pattern of sea water in the aquarium, plan view. Filter 10B was composed of layers of small stones (diameter of 5 mm, and thickness of 5 cm) ; glass wool (thickness of 5 mm when not wet) ; and sand of grain diameter 2 mm (thickness, 25 cm). The area of filter 10B was in2. Filter IOC was composed of layers of small stones (diameter of 5 mm, and thickness, 10 cm) ; glass wool (thickness, 5 mm) ; activated charcoal (cylindrical pieces with diameters of mm, and length of 4 mm ; thickness of the layer, 20 cm) ; and sand (diameter of 2 mm on an average, and thickness, 40 cm). A layer of commercially availahle Zeolite (diameter of 4 mm and thickness, 5 cm) was added in 1975 to the above consituents of filter 10° C to moderate pH change. The temperature control unit can regulate the sea water temperature in the aquarium at specific temperatures in the range 10° C and 25° C with an accuracy of ± ° C. The circulation pump circulated the sea water at the rate of 200 1/min for the system (Spotte, 1973; Mariscal, 1974). RESULTS The heavy solid line in Figure 2 shows a typical percentage of survival in rela- tion to number of maintenance days, obtained from a total of twenty squid in 1974. In 1974, undisturbed observations on the maintained squid were made on two sets of seven clays, the initial week and the last week of the squid season. For. Please note that these images are extracted from scanned page i
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
