. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LIFE CYCLE OF A PARASITIC ANEMONE 445 I'n all subsequent attempts the medusae were fed daily with plankton obtained with a no. 12 plankton net and consisting primarily of arthropods and algae. Under these feeding conditions, the planulae successfully parasitized the medusae. Single planulae were introduced into 65 medusae and of these, 30 lived longer than 2 days. Ten from this group of 30 successful starts completed the parasitic stage and became free-living. 200u. r FIGURE 2. Additional details of the parasitism by Pcachia
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LIFE CYCLE OF A PARASITIC ANEMONE 445 I'n all subsequent attempts the medusae were fed daily with plankton obtained with a no. 12 plankton net and consisting primarily of arthropods and algae. Under these feeding conditions, the planulae successfully parasitized the medusae. Single planulae were introduced into 65 medusae and of these, 30 lived longer than 2 days. Ten from this group of 30 successful starts completed the parasitic stage and became free-living. 200u. r FIGURE 2. Additional details of the parasitism by Pcachia quinquecctpitata. (a) A section of an endoparasite in the radial canal of its host. The arrow indicates the blebbed epidermis of the anemone. Epon section stained with 1% aqueous p-pheiiylenediamine : ( b) Longitudinal section of a parasite on the gonad (g) of the host medusa. Xote that the shape of the gonad matches that of the mouth of the parasite. Paraffin section stained with hematoxylin and eosin : (c) Longitudinal section of the oral disk of an ectoparasite attached to the sulmmbrella of a medusa (in). A nematocyst (n) is sbo\vn penetrating the host tissue. Discharged spirocysts (s) are also present. Kpon section stained \\rith A/ure II, Methyleiie lilue; (d) A phase contrast micrograph of a tentacle bud .showing the discharged nematocysts (arrows) pene- trating the subumbrella of the host medusa; a living preparation,. 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; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
