. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CRAYFISH CELL SIZE AND METABOLISM 267 surface is given by 2-n-rl and their volume by Ti-r-1, so surface per unit volume is the former over the latter or 2/r (4/d). This quantity, expressed as surface/ fibers, is defined as the surface concentration of the muscle. Examination of fiber cross-sections indicates extra-fibral spaces less than 5f/c of the total area of the section. Other measurements Measurements were also made of abdomen length and breadth, eye diameter, and ommatidia facet size. The decapod ommatidium
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CRAYFISH CELL SIZE AND METABOLISM 267 surface is given by 2-n-rl and their volume by Ti-r-1, so surface per unit volume is the former over the latter or 2/r (4/d). This quantity, expressed as surface/ fibers, is defined as the surface concentration of the muscle. Examination of fiber cross-sections indicates extra-fibral spaces less than 5f/c of the total area of the section. Other measurements Measurements were also made of abdomen length and breadth, eye diameter, and ommatidia facet size. The decapod ommatidium is a receptor unit of a definite SLOPE = 0 cc UJ CO u_ o u o 1000 -- 500 -- 100 -- SLOPE = - 022. + BODY CMS, —I 1 1 h + .001 .010 .100 FIGURE 2. Muscle surface concentration plotted against body weight in grams. Both ordinate and abscissa are in log form. The equation of the experimentally determined line is: fibers = 830 (W)-°'22. number of cells (Schneider, 1902), so that an analysis of eye size and facet size allows an indirect examination of cell growth and organ growth using the familiar allometric equation of Huxley (1932). Eye diameter was obtained by observing the animal in dorsal aspect and taking 2 the diameter parallel to the longitudinal axis of the animal. Abdomen length was taken as the dorsal distance between the posterior margin of the cephalothorax and the base of the telson. Abdomen breadth is the ventral distance between the pleura of the first abdominal segment. The size of the corneal facets, which are square in the crayfish, was determined 2 y = b xk. y = linear dimension of organ or cell; x = linear dimension of reference organ or the comparable dimension derived from the body weight (W1); b = constant of propor- tionality ; k = allometric coefficient, indicated by the slope when log y is plotted versus log Please note that these images are extracted from scanned page images that may have been digitally enhanced
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
