. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Body Length (cm) a male • female Figure 7. Relationship, obeying y = + (SD = ). between body length and ommatidial length of retina, determined as the average of 3-7 measurements taken from each longitudinally sectioned eye of male and female specimens. length of an animal, with growth of the whole animal as well (Fig. 5). The smallest and the largest specimens exam- ined exhibited facet diameters of 35 jam and 105 /im, respectively. Once again, there were no differences bet
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Body Length (cm) a male • female Figure 7. Relationship, obeying y = + (SD = ). between body length and ommatidial length of retina, determined as the average of 3-7 measurements taken from each longitudinally sectioned eye of male and female specimens. length of an animal, with growth of the whole animal as well (Fig. 5). The smallest and the largest specimens exam- ined exhibited facet diameters of 35 jam and 105 /im, respectively. Once again, there were no differences between male and female individuals. The length of the dioptric structures (h in Fig. ID) for both male and female individ- uals increased linearly in relation to body length of an animal (Fig. 6). The width of the retinal layer, measured as retina length per ommatidium in the eye of both males and females, also increased in relation to greater individual body size (Fig. 7), but with more variability (/? = ) than some other structures of the eye, for example, the layer of the dioptric elements mentioned earlier (see above). True interommatidial angles cannot be obtained in L. exotica, because rhabdomeres are frequently skewed and the 220- • 200- : 180- 160- 140- ' 120- 100- ' 80- 60- 40- 20- • 0-. male female Body Length (cm) Figure 6. Relationship, obeying y = + 71 (SD = ; R = ) between body length and length of dioptric apparatus, determined as the average of 3-7 measurements taken from each longitudinally sectioned eye of male and female specimens. axes of ommatidial groups of retinula cells are not always parallel to the axes of the dioptric structures. Since the spacing of the facets is an important parameter in vision, two alternative angles, which are probably independent from each other, were measured. Dioptric systems of neigh- boring ommatidia, involving only cornea and cone cells, were usually straight.
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
