. Le bulletin biologique. Biologie ; zoologie ; biologie ; biologie marine. 400 N. W. BLACKSTONE ET L. W. TABLEAU IV BUS / valislicsfor' ve la croix 10 utilisé dans l'élevage st o) finale moyenne initiale Parents* n n n Forme Forme Forme polype 15 X 11 365,86 0,25 368,36 0,47 1,44 0,91 19,6 231 3,1 15 x 13 36 6,61 0,39 6,71 0,40 36 6,75 0,54 28 8,3 1,2 36 12X7 7,26 0,30 4,99 0,38 36 6.170.20 28 11,1 0,9 12 X 236 7,08 0,36 7,85 0,28 8,98 36 23 0,70 5,4 1,0 5X8 36 36 7,98 0,29 21 7.770.42 6,78 0,73 12,2 1,4 5X9 367,90 0,35 366,87 0,30 196,76 0,68 1 1,9 1,4 14 x 136 8,56 0,46 8,74 0,34 36 316,59

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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 400 N. W. BLACKSTONE AND L. W. BUSS Table IV /' ve valislicsfor the 10 crosses used in the breeding st o) Initial Average Final Parents* n Shape n Shape n Shape Polyp 15 X 11 36 5.86 0.25 36 8.36 0.47 23 1 1.44 0.91 19.6 3.1 15 x 13 36 6.61 0.39 36 6.71 0.40 28 6.75 0.54 8.3 1.2 12X7 36 7.26 0.30 36 6.170.20 28 4.99 0.38 11.1 0.9 12 X 2 36 7.08 0.36 36 7.85 0.28 23 8.98 0.70 5.4 1.0 5X8 36 7.770.42 36 7.98 0.29 21 6.78 0.73 12.2 1.4 5X9 36 7.90 0.35 36 6.87 0.30 19 6.76 0.68 1 1.9 1.4 14 x 1 36 8.56 0.46 36 8.74 0.34 31 6.590.61 19.7 1.1 14 x 10 28 5.55 0.23 28 5.63 0.22 17 6.74 0.76 19.52.4 3x4 36 7.1 1 0.37 36 6.28 0.27 27 4.13 0.14 8.4 0.9 3X6 36 6.09 0.34 36 6.180.34 25 5.64 0.56 8.0 1.2 "Sample sizes (n). means and standard errors for shape measures (perimeter/lfarea) from initial colonies (primary polyps 0.40) and a large effect of the male parent (F == 11.3, d.f. = 5, 232, P « 0.001). Overall, the slight effect of the female parent (i.e.. a non-significant covari- ance of the half sibs) indicates that ff(em.dfi is relatively small and that both maternal effects and additive genetic variance are correspondingly small. On the other hand, the large effect of the male parent suggests a large co- variance of the full sibs. a relatively large (7maies2. and likely a large non-additive genetic variance, given the closely controlled environmental conditions. The interpretation of these results should be limited to the small laboratory population on which the breeding studies were based (see Discussion). While environmental effects could not be tested directly with this experimental design, the six offspring raised on hermit crab shells and then compared using clonal re- peatibility allow an assessment of the sensitivity of Hy- dractinia colony morphology to environmental circum- stances. These colonies were from crosses 15x11 and 15X13 (see Table IV); Figure 3 shows the shape measures for the

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• bookauthorlilliefrankrat
• booksubjectbiology
• booksubjectzoology