- Saccadic movement strategy in a semiaquatic species – the harbour seal (Phoca vitulina)
Summary: Harbour seals perform head and body saccades, which have previously only been described for terrestrial species; thereby, they might optimize distance estimation from optic flow or reduce motion blur.
- Selective attention in peacocks during assessment of rival males
Summary: Peacocks selectively direct their attention toward the lower display regions of the train during rival assessment in a pattern similar to how peahens direct their attention toward potential mating partners.
- A second visual rhodopsin gene, rh1-2, is expressed in zebrafish photoreceptors and found in other ray-finned fishes
Summary: An ancient duplication of the rhodopsin gene, rh1-2, is a functional visual pigment and is expressed in retinal photoreceptors.
- Retinal specialization through spatially varying cell densities and opsin coexpression in cichlid fish
Summary: Cichlid retinas show spatial variation with an area centralis that has higher photoreceptor and ganglion cell density and less opsin coexpression. Visual modeling suggests this may reflect a trade-off between colour discrimination and contrast detection.
- Light level impacts locomotor biomechanics in a secondarily diurnal gecko, Rhoptropus afer
Highlighted Article: Vision is critical for locomotion, but it is poorly understood in relation to locomotor biomechanics in non-human vertebrates. The secondarily diurnal gecko, Rhoptropus afer, shows changes in speed and posture in low light conditions.
- The answer is blowing in the wind: free-flying honeybees can integrate visual and mechano-sensory inputs for making complex foraging decisions
Summary: In complex environments, free-flying honeybees are able to integrate both visual and wind-induced mechano-sensory cues to make decisions in a way that is suggestive of integrative processing by the brain.
- The ocelli of Archaeognatha (Hexapoda): functional morphology, pigment migration and chemical nature of the reflective tapetum
Summary: The ocelli of the jumping bristletail Machilis hrabei have a reflective tapetum containing xanthine crystals. The screening pigment in the photoreceptor cells migrates behind the tapetum upon dark adaptation.
- Photoreception and vision in the ultraviolet
Summary: Humans are blind to ultraviolet light, but most animals have a well-developed sensitivity to this very short-wavelength range. This Review focuses on how ultraviolet photoreceptors commonly contribute to high-level visual function and are used in both color and polarization vision.