Archive image from page 31 of Current herpetology (2000). Current herpetology currentherpeto2012001niho Year: 2000 ( Solitary .;> 9' .'r' < <<''\P'' <r ' Conspecific cues Fig. 2. Effects of conspecific larval cues and density on the residuals of head width (the deviations from expected HW for larvae of given SVL). Data expressed as means±SE (N=12). Open and closed circles denote minimum and maximum values, respectively. there was no additional effect of both chemical and visual cues on development of relative HW (Fig. 2). I assumed that these results were caused by in
Archive image from page 31 of Current herpetology (2000). Current herpetology currentherpeto2012001niho Year: 2000 ( Solitary .;> 9' .'r' < <<''\P'' <r ' Conspecific cues Fig. 2. Effects of conspecific larval cues and density on the residuals of head width (the deviations from expected HW for larvae of given SVL). Data expressed as means±SE (N=12). Open and closed circles denote minimum and maximum values, respectively. there was no additional effect of both chemical and visual cues on development of relative HW (Fig. 2). I assumed that these results were caused by individual variation in the degree of relative HW development among the larvae. In fact, there was one larva with a much larger relative HW in the chemical cue treatment (Fig. 2). In contrast, the enlargement of HW of the larvae in visual cue treatment was considered to be small. For this reason, the effect of visual cues was not detected when the effect of these cues in the group was examined by two-way ANOVA. Even under solitary conditions, the concen- tration of larval-originated chemicals in both the visual and control treatments could have been higher than in the chemical and visual plus chemical treatments. In addition, dissolved oxy- gen concentration in the former may have been lower than in the latter owing to the oxygen consumption occurring in a closed cup. There- fore, it can be concluded that the cues from
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