. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. GROWTH OF TADPOLES AND CROWDING 363 had slightly less inhibitory effect than had equal numbers of the same brood, but there was no doubt of their effect. Other species used to furnish crowding were Raiia sylvatica and Amblystoma punctatum. The sylvatica tadpoles were as effective as equal-sized pipicns tadpoles. The Amblystoma larvae gave inconclusive results because they were not furnished with sufficient animal food and so did not grow appreciably. As a result, the experimental sylvatica tadpoles grew almost as rapidly as
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. GROWTH OF TADPOLES AND CROWDING 363 had slightly less inhibitory effect than had equal numbers of the same brood, but there was no doubt of their effect. Other species used to furnish crowding were Raiia sylvatica and Amblystoma punctatum. The sylvatica tadpoles were as effective as equal-sized pipicns tadpoles. The Amblystoma larvae gave inconclusive results because they were not furnished with sufficient animal food and so did not grow appreciably. As a result, the experimental sylvatica tadpoles grew almost as rapidly as their uncrowded 20 10 0 5 10 15 20 25 30 35 FIG. 9. Comparison of growth in fresh water and in water previously inhab- ited by tadpoles. Cultures s and t each contained 32 individuals; every four days their water (500 cc.) was given to g and h respectively, each containing one indi- vidual. Culture k contained one individual which received 500 cc. of fresh water every four days. All belonged to brood X at 19° C. In one series of tests a number of snails or of leeches were placed with the tadpoles. These tadpoles grew just as rapidly as their controls of the same brood. In another experiment an uncrowded individual that had grown large was placed in the same culture with 32 crowded individuals of the identical brood. Growth was checked in the large individual. The. 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
