. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SEXUAL PHEROMONES IN APLYSIA 85 0} a co n 3 15 10 Positive No choice Negative. Nonlayer Egg layer Nonlayer Egg layer No eggs No eggs Eggs Eggs Stimulus Figure 3. Egg layers are attractive to Aplysia braxiliana: a larger number of animals was attracted to an egg layer without eggs than was attracted to a nonlayer without eggs, and the patterns of responses to the two stimuli are significantly different [X2(2) = ; P < ]. Egg cordons are also attractive to A. brasiliana: a larger number of animals was attracted to
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SEXUAL PHEROMONES IN APLYSIA 85 0} a co n 3 15 10 Positive No choice Negative. Nonlayer Egg layer Nonlayer Egg layer No eggs No eggs Eggs Eggs Stimulus Figure 3. Egg layers are attractive to Aplysia braxiliana: a larger number of animals was attracted to an egg layer without eggs than was attracted to a nonlayer without eggs, and the patterns of responses to the two stimuli are significantly different [X2(2) = ; P < ]. Egg cordons are also attractive to A. brasiliana: a larger number of animals was attracted to a nonlayer with eggs than was attracted to a nonlayer without eggs, and the response patterns are significantly different [X:(2) = ; P < ]. The effects of egg layers and egg cordons are not additive at the concentrations tested: the response patterns for a nonlayer with eggs and an egg layer without eggs are identical, and do not differ significantly from the pattern obtained for an egg layer with eggs [X2(2) = ; < P < ]. This bar graph is based on 60 single-arm experiments, 15 per stimulus; in each experiment, animals were choosing between a stimulus in one arm and no stimulus in the other. a source of pheromonal activity. Neither pattern differed significantly from that obtained for an egg-laying animal with an egg cordon [X2(2) = ; < P < ], dem- onstrating that the effects of the layer-derived and cordon- derived factors are not additive at the concentrations tested. Subsequent experiments examined whether animal- derived factors are required for the attractiveness of the egg cordon and whether the attraction is visually mediated. Two series of experiments were performed. In the first, an egg cordon without any animal served as the stimulus. The level of attraction and pattern of responses were identical to those obtained using an egg layer and its cor- don as the stimulus (Figs. 3, 4), demonstrating that egg cordons are suf
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
