. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HYDRA NEURONS DURING EMBRYOGENESIS 73. 20 d Cuticle Minus 2 Stage Figure 1. Mean (±standard error of the mean (SEM)) total numbers (a) and population densities (b) of RFamide-immunoreactive neurons and JDl-immunoreactive neurons in different developmental stages of Hydra vulgaris (n = 51. One-way ANOVA for RFamide-positive neurons across all stages and for JD1-positive neurons across the last four stages showed significant differences (for number of RFamide-positive neurons F = , df = 5. P = ; for number of JDl-pos
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HYDRA NEURONS DURING EMBRYOGENESIS 73. 20 d Cuticle Minus 2 Stage Figure 1. Mean (±standard error of the mean (SEM)) total numbers (a) and population densities (b) of RFamide-immunoreactive neurons and JDl-immunoreactive neurons in different developmental stages of Hydra vulgaris (n = 51. One-way ANOVA for RFamide-positive neurons across all stages and for JD1-positive neurons across the last four stages showed significant differences (for number of RFamide-positive neurons F = , df = 5. P = ; for number of JDl-positive neurons F = df = 3. P = ; for density of RFamide-positive neuron population F = df = 5, P = ; for density of JD1-positive neuron population F = df = 3. P = ). Results of post-hoc Tukey's honestly significant difference tests are indicated with letters (uppercase for RFamide results and lower case for JD1 results). Within- stage differences between the RFamide-positive population and the JDl- positive population were compared for each of the last four stages via t tests. The cigar stage (separate variances / = , df = 8, and P = ) and adult (separate variances ; = - df = 7, P = ) each showed a significant difference between the total RFamide-positive popu- lation and the total JDl-positive neuron population. The cigar stage (sep- arate variances / = 3, df = 8. and P = , tentacle bud stage (separate variances t = df = 7. and P = ), and adult (separate variances ' = , df = 8, and P = ) also each showed a significant difference between the two neuron population densities. Results of the t test are indicated by numbers. Bars that share a letter or number within the range of an ANOVA or t test are not significantly different (P > ). lb). All significant changes in the number of RFamide- positive neurons and in the number of JDl-positive neurons were increases (Fig. la). The density of eac
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
