. The Biological bulletin. Biology; Zoology; Marine biology. 282 J. M. LANE AND J. M. LAWRENCE £ 6--. ^V non- starved starved VI VII VIII IX X XI XII I II III MONTH Figure 4. Seasonal changes in the amounts of total nitrogen in a starved and non-starved 1-g specimen of Mellita quinquicsperforata. Values were calculated using pooled seasonal slopes and adjusted intercepts. Slopes used for non-starved animals are: summer, ; fall, ; winter, Slopes used for starved animals are: summer, ; fall, temperature, a 10-g animal (dry weight) would respire ml 02/hr p
. The Biological bulletin. Biology; Zoology; Marine biology. 282 J. M. LANE AND J. M. LAWRENCE £ 6--. ^V non- starved starved VI VII VIII IX X XI XII I II III MONTH Figure 4. Seasonal changes in the amounts of total nitrogen in a starved and non-starved 1-g specimen of Mellita quinquicsperforata. Values were calculated using pooled seasonal slopes and adjusted intercepts. Slopes used for non-starved animals are: summer, ; fall, ; winter, Slopes used for starved animals are: summer, ; fall, temperature, a 10-g animal (dry weight) would respire ml 02/hr per animal and ml 02/hr per animal at 25° C; ml 02/hr per animal and ml 02/hr per animal at 20° C; and and ml 02/hr per animal at 30° C in closed and open systems respectively. Comparison of respiration during the day and night in an open system showed no trends. Discussion As found with many other echinoderms and invertebrates in general, the respira- tory rates of Mellita quinquiespei-forata are modified by a variety of factors. Body weight or age is one such factor. Smaller (younger) animals have proportionally higher rates of respiration than larger (older) animals when rates are based on both body weight or body nitrogen. Similarly, this effect of size (age) on rate of 02 uptake has been found in all other echinoids studied and regression slopes (logio ml 02 respired/hr per animal versus logio body weight) for echinoids generally fall between and (Lewis, 1967, 1968; McPherson, 1968; Percy, 1971; Webster, 1972; Miller and Mann, 1973). An adequate or complete explanation for this phenomenon is lacking. The decreasing surface area with increasing weight explanation does not appear to apply in the case of M. quinquics-. 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 origin
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectb, booksubjectzoology
