. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HEMICHORDATE RESPIRATION AND ECOLOGY 459. too 200 3OO FIGURE 1. Rate of oxygen uptake of P. flat'a in relation to body weight; abscissa repre- sents dry body weight in mg; ordinate, rate of oxygen uptake in ml/g/hr. Solid squares indi- cate the rate of oxygen uptake of P. flara during high tide periods in non-breeding season. Solid circles indicate the rate of oxygen uptake of P. flava during low tide periods in breeding season. Open circles indicate the rate of oxygen uptake of P. flava during high tide periods in breeding
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HEMICHORDATE RESPIRATION AND ECOLOGY 459. too 200 3OO FIGURE 1. Rate of oxygen uptake of P. flat'a in relation to body weight; abscissa repre- sents dry body weight in mg; ordinate, rate of oxygen uptake in ml/g/hr. Solid squares indi- cate the rate of oxygen uptake of P. flara during high tide periods in non-breeding season. Solid circles indicate the rate of oxygen uptake of P. flava during low tide periods in breeding season. Open circles indicate the rate of oxygen uptake of P. flava during high tide periods in breeding season. Solid lines A, Bl, and B2 are the computed regression lines. straight lines, Bl and B2, were derived statistically from low and high tide periods respectively : the regression equations being Y — + (Bl) and Y + (B2), respectively. The metabolic rate of the animals during the breeding season is higher than that of nonbreeding animals. The high tide values of the animals during both periods were subjected to Student's t test, and the difference between the two sets of values is statistically significant. uptake and tidal cycle It is well known that periodic tidal inundations can shape behavioral and physiological responses into defined rhythms. Fluctuations in oxygen consumption over a period of time conform to tidal rhythm. Such results show three different patterns in the respiratory responses: Tl, a neatly defined rhythm; T2, a tidal rhythm with additional peaks during low tides; or T3, absence of any defined rhythm correlated with phase of the tide. Data which are typical of the three. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952;
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
