. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 112 A. FARMANFARMAIAN AND JOHN H. PHILLIPS established that a starving sea urchin will resorb its gonads, but there is no indica- tion that the gonads constitute the natural storage organ of these animals. A recent study of Giese (1961 ) indicates that lipid is the main reserve food of Strongvloccn- trotus purpuratus, S. jranciscanus, and Alloccntrotus fragilis. The lipid is stored in the wall of the intestinal tract and is observed to decrease in amount during starva- tion. In the asteroids the hepatic caeca have been shown
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 112 A. FARMANFARMAIAN AND JOHN H. PHILLIPS established that a starving sea urchin will resorb its gonads, but there is no indica- tion that the gonads constitute the natural storage organ of these animals. A recent study of Giese (1961 ) indicates that lipid is the main reserve food of Strongvloccn- trotus purpuratus, S. jranciscanus, and Alloccntrotus fragilis. The lipid is stored in the wall of the intestinal tract and is observed to decrease in amount during starva- tion. In the asteroids the hepatic caeca have been shown to be the organs of stor- age (Farmanfarmaian et al., 1958; Anderson, 1953). Anatomically these are diverticula of the digestive tract, and the festoons of the sea urchin digestive tract may be compared to them in function. TRANSLOCATION OF NUTRIENTS 1. The haemal system In general this system consists of poorly defined sinuses often filled with red coelomocytes. No movement of fluid within any part of the system has been ob- served even though a rhythmic beat may be seen in the outer sinus of the stomach and its collateral sinuses. In spite of careful attempts, the fluid could not be sampled without contamination. Therefore, the role of the haemal system in the transport of nutrients was assessed by indirect means. C14-labelled material ap- pears in the gonads even on the first day after feeding; see Table III. Each gonad. FKITKE 3. The aboral haemal ring and its short sinuses which penetrate the gonads. The arrow indicates one of the sinuses. Photograph is of a fresh specimen enlarged two 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; Lillie, Frank Rattray, 1870-1947;
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
