Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 11 March 2020 The Retinal Basis of Vision in Chicken Seifert M1$, Baden T1,2, Osorio D1 1: Sussex Neuroscience, School of Life Sciences, University of Sussex, UK; 2: Institute for Ophthalmic Research, University of Tuebingen, Germany. $Correspondence to
[email protected] SUMMARY sensitivities and birds are probably tetrachromatic. The number of receptor The Avian retina is far less known than inputs is reflected in the retinal circuitry. that of mammals such as mouse and The chicken probably has four types of macaque, and detailed study is horizontal cell, there are at least 11 overdue. The chicken (Gallus gallus) types of bipolar cell, often with bi- or tri- has potential as a model, in part stratified axon terminals, and there is a because research can build on high density of ganglion cells, which developmental studies of the eye and make complex connections in the inner nervous system. One can expect plexiform layer. In addition, there is differences between bird and mammal likely to be retinal specialisation, for retinas simply because whereas most example chicken photoreceptors and mammals have three types of visual ganglion cells have separate peaks of photoreceptor birds normally have six. cell density in the central and dorsal Spectral pathways and colour vision are retina, which probably serve different of particular interest, because filtering types of behaviour. by oil droplets narrows cone spectral 1 © 2020 by the author(s). Distributed under a Creative Commons CC BY license. Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 11 March 2020 INTRODUCTION Mielke, 2005; Jones et al., 2007; Richard H.