. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 46 Y. BENAYAHU AND Y. LOYA TABLE I Presence of planulae within brooding pouches o/Xenia macrospiculata during 1977-1981 Year June July August September 1977 1978 1979 1980 1981 -1- a tail measuring 45-50 /xm. Spawning was recorded within a wide range of testis diameters (100-400 pm). during the spawning period the polyp cavities also contained many empty sperm sacs, recognizable by their wrinkled surface. Although sperm release was not observed, it is presumed that it took place through the polyp mouth. The ripe eggs of A',
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 46 Y. BENAYAHU AND Y. LOYA TABLE I Presence of planulae within brooding pouches o/Xenia macrospiculata during 1977-1981 Year June July August September 1977 1978 1979 1980 1981 -1- a tail measuring 45-50 /xm. Spawning was recorded within a wide range of testis diameters (100-400 pm). during the spawning period the polyp cavities also contained many empty sperm sacs, recognizable by their wrinkled surface. Although sperm release was not observed, it is presumed that it took place through the polyp mouth. The ripe eggs of A', macrospiculata detach from the mesenteries into the coelenteron, where they are probably fertilized. Then the eggs pass into special endodermal chambers (Fig. la), which we termed brooding pouches because larval embryogenesis occurs there. The color of the surrounding walls of the pouches is dark brown due to the high content of zooxanthellae. Each individual brooding pouch contains 15-30 em- bryos of the same developmental stage. Examination of colonies during the planulation period revealed that they simultaneously bear oocytes and planulae of various de- velopmental FIGURE 1. Planulae of Xenia macrospiculata a: Brooding pouches with young planulae (X7), an- thocodium (A), planulae (P), polyp cavity (PC), b: Planula emission through a temporary opening (XI5), arrows indicate the emerged larva, c: Mature planula attached by mucus (M) to the substrate (X25). d, e: Contracted planulae (X25). f, g: Malformations of planulae (X25).. 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, 1890-19
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
