Many hundreds of species of birds typically migrate at night, and it is well known that fires
and artificial lights attract birds during migration, particularly when the sky is cloudy and the …

Abstract The Australian lungfish Neoceratodus forsteri (Dipnoi) is an ancient fish that has a
unique phylogenetic relationship among the basal Sarcopterygii. Here we examine the …

Purpose: Circadian clocks in retinas regulate a variety of biochemical and physiological
processes. Retinal neurons, particularly photoreceptor cells, are thought to contain …

1. The photopic spectral sensitivity of domestic ducks and turkeys was determined using an
operant psychophysical technique. Spectral sensitivity was determined over a range of …

The evolution of visual communication is explored in the context of recent findings of the
potential for colour vision in the first vertebrates (the lampreys). Colour discrimination is …

The diversity of visual appearances among animals largely stems from the various signals
used in communication, eg for mating, avoiding predators or foraging. Sexual selection by …

Although most bird species are diumal, several studies have shown that some seabirds are
active at nïght in different aspects of their life cycle. Noctumal lifestyle requires some …

The density and proportion of different spectral classes of photoreceptors within the retina
impacts both the visual acuity and color representation of an animal's visual world. Thus, two …

Using corneal electroretinography (ERG), the spectral sensitivÏty of ring-billed gulis (Larus
deÏawarensis) and gray guils (Larus modestus), two species partly active at night, was …

The term “mucopolysaccharides” was coined by Meyer (1938) for those substances isolated
from connective tissues and having similar physicochemical properties. With increased …