. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 166 C. S. MCFADDEN this slide were reversed during the experiment; all other contests involving either P3 or P4 yielded results consistent with predictions based on a transitive hierarchy. The amount c j >ne required for one P. carnea colony to overgrow another depends only on the identity of the losing colony in the contest (Table I; Kruskal-Wallis, within rows, P < .01}. nd not on the identity of the winner (Table I; Kruskal-Wallis, within columns, P'- 2). For instance, there was no difference in the number of days r
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 166 C. S. MCFADDEN this slide were reversed during the experiment; all other contests involving either P3 or P4 yielded results consistent with predictions based on a transitive hierarchy. The amount c j >ne required for one P. carnea colony to overgrow another depends only on the identity of the losing colony in the contest (Table I; Kruskal-Wallis, within rows, P < .01}. nd not on the identity of the winner (Table I; Kruskal-Wallis, within columns, P'- 2). For instance, there was no difference in the number of days required for genotypes P2, P3, and P4 to overgrow inferior competitor PI, while the amount of time P3, the competitive dominant, took to overgrow PI, P2, and P4 was highly variable (Table I). Interspecific competition H. echinata exhibits little or no hyperplastic growth upon contact with P. carnea. Occasionally the growing tips of//, echinata stolons swell and rise off the substratum slightly in response to contact with P. carnea, but further hyperplastic development rarely occurs. Stolons of P. carnea rapidly overgrow H. echinata stolons without be- coming hyperplastic, but begin hyperplastic growth immediately upon contact with mat tissue. P. carnea stolons are unable to grow across mat tissue, and consequently, mounds of hyperplastic stolon up to 5 mm in height accumulate at the periphery of the mat area at every point of contact between P. carnea stolons and H. echinata mat tissue (Fig. 2). These mounds may extend out over the surrounded mat tissue for as much as 2 cm, but they are not anchored to the underlying mat tissue and are easily broken off. The underlying H. echinata polyps are resorbed subsequent to overgrowth. FIGURE 2 A contest between P. carnea (P) and H. echinata (H). P. carnea has produced hyperplastic stolons (S) where it is in contact with H. echinata mat Please note that these images are extracted from scanned page images that may have been digita
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
