. The biology of hydra and of some other coelenterates, 1961. Hydra; Cnidaria; Ctenophora; Cnidaria; Hydra. 260 THE BIOLOGY OF HYDRA : 1961 FED DAILY. GREEN ALBINO 10 TIME IN DAYS Fig. 4. Semi-log plot of growth rates of duplicate cultures of green and albino C. yiridissima fed daily in the light. number of hydranths was counted and then each hydranth was fed on a dense suspension of Artemia nauphi. One hour after feeding and again, six hours later, the culture medium was renewed. This routine was followed for 5-7 days. Figure 4 shows that green and albino C. viridissima, when fed daily, have
. The biology of hydra and of some other coelenterates, 1961. Hydra; Cnidaria; Ctenophora; Cnidaria; Hydra. 260 THE BIOLOGY OF HYDRA : 1961 FED DAILY. GREEN ALBINO 10 TIME IN DAYS Fig. 4. Semi-log plot of growth rates of duplicate cultures of green and albino C. yiridissima fed daily in the light. number of hydranths was counted and then each hydranth was fed on a dense suspension of Artemia nauphi. One hour after feeding and again, six hours later, the culture medium was renewed. This routine was followed for 5-7 days. Figure 4 shows that green and albino C. viridissima, when fed daily, have nearly identical logarithmic growth rates. These results imply that the algae do not contribute anything to the host that cannot be acquired from an exogenous food supply. Under optimal conditions, nutritional benefit would not be expected to manifest itself in terms of growth of the host because the maximum growth rate (kmax), a property intrinsic to the species, cannot be exceeded, regardless of the magnitude of the algal contribution. Therefore, we conducted growth experiments in which the amount of food was limited, reasoning that this would then allow benefit from the algae to express itself. Figure 5 demonstrates that, when fed every second. 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 Symposium on the Physiology and Ultrastructure of Hydra and Some Other Coelenterates (1961 : Coral Gables, Fla. ); Lenhoff, Howard M; Loomis, W. Farnsworth (William Farnsworth), 1914-. Coral Gables, Fla. , University of Miami Press
Size: 2023px × 1236px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, booksubjectcnidaria, booksubjectctenophora
