2020
DOI: 10.1101/2020.09.18.303784
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A sexual dimorphism in the spatial vision of band-winged grasshoppers

Abstract: Visual acuity (VA) --- a measurement of the fineness or coarseness of vision --- correlates with the size of an animal, with larger species often possessing sharper vision. However, it is unknown whether the same relationship between visual acuity and size holds within a species when individuals differ consistently and substantially in size, such as through a sexual size dimorphism. Here we examine the visual acuity of three species of sexually dimorphic band-winged grasshoppers, in which females are the large… Show more

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“…Conversely, having many small ommatidia with narrow interommatidial angles can enhance acuity, but this may decrease contrast sensitivity (Currea et al, 2018; Palavalli-Nettimi and Theobald, 2020; Warrant, 1999, 2006). Differences in ommatidia number and size, as well as trade-offs between these structural features of compound eyes, have been described for a range of different insects (Duncan et al, 2020; Gonzalez-Bellido et al, 2011; Horridge, 1977; Posnien et al, 2012; Wakakuwa et al, 2007). Furthermore, variation in ommatidia size across the eye within species is also widely documented (Land, 1989).…”
Section: Introductionmentioning
confidence: 99%
“…Conversely, having many small ommatidia with narrow interommatidial angles can enhance acuity, but this may decrease contrast sensitivity (Currea et al, 2018; Palavalli-Nettimi and Theobald, 2020; Warrant, 1999, 2006). Differences in ommatidia number and size, as well as trade-offs between these structural features of compound eyes, have been described for a range of different insects (Duncan et al, 2020; Gonzalez-Bellido et al, 2011; Horridge, 1977; Posnien et al, 2012; Wakakuwa et al, 2007). Furthermore, variation in ommatidia size across the eye within species is also widely documented (Land, 1989).…”
Section: Introductionmentioning
confidence: 99%