. Advances in marine biology: volume 17. Coral fisheries. ECOLOGY AND TAXONOMY OF Holimeda 201. Fig. 62b. Same plant shown in Fig. 62a, in culture, five weeks later, showing complete disintegration of the thallus. In the reef the thallus would have collapsed sooner from currents and animal disturbances. Scale bar is 1 cm. inference. That the flagellated zooids were evidence of a sexual cycle was not finally demonstrated until fusion was observed in remarkably recent times (Nasr, 1947; Chihara, 1956; Kamura, 1966; Merten, 1971; Meinesz, 1972b). The demonstration of vegetative reproductive cycle
. Advances in marine biology: volume 17. Coral fisheries. ECOLOGY AND TAXONOMY OF Holimeda 201. Fig. 62b. Same plant shown in Fig. 62a, in culture, five weeks later, showing complete disintegration of the thallus. In the reef the thallus would have collapsed sooner from currents and animal disturbances. Scale bar is 1 cm. inference. That the flagellated zooids were evidence of a sexual cycle was not finally demonstrated until fusion was observed in remarkably recent times (Nasr, 1947; Chihara, 1956; Kamura, 1966; Merten, 1971; Meinesz, 1972b). The demonstration of vegetative reproductive cycles in Halimeda has been even more recent. Field workers have long noticed that some sort of reproduction by creeping growth through sand must occur, but only recent culture work has shown the details and varieties of this process (Colinvaux et al., 1965; Colinvaux, 1968b; Hillis-Colinvaux, 1973). This work shows that individual Halimeda thalli have a definite term to their existence, and that new thalli are cloned from creeping rhizoids of the parent thallus, or from broken portions partially buried by chance. There is no difficulty in recognizing generations in Halimeda (Fig. 63), whether these be sexual or asexual, and the life-cycle always seems to involve youth, a maturity measured in months, sometimes longer, senescence and 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 Hillis-Colinvaux, Liewellya. London : Academic Press ; Toronto
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