Since bees can distinguish between the different colours of wild type and mixta flowers, and can learn to associate those colour differences with different rewards [5], [24], they could be using them as a cue associated with some other physical property of the flower.
A remarkable improvement in accuracy can be achieved from MUOCS standards: For a broad dataset of 1700 virgin olive oils produced in Spain during four different harvests, the average colour differences to the closest standards were 2.86, 3.99, and 8.17 CIELAB units using MUOCS, UOCS and BTB, respectively.
Uniform colour spaces were developed for and hence only accurately model the colour differences between large patches of uniformly coloured samples.
Moreover, various chemical tests were used so far in identification and differentiation of crop varieties based on the colour differences generated in the aleurone layer when reacted with different chemical tests.
Even though males from the two genetic backgrounds did not differ in aggressive behaviour or competitive ability, the colour differences between them may have fitness consequences via their relationship with body size if colour traits are used by males to assess the size of potential rivals and/or by females to assess the size of potential mates.
This procedure ensured each photograph to have the same standard colouration and thus allowed for a quantitative comparison of individual colour differences.
Moreover, as very different methods to quantify colour variation have been used it is not possible to compare the magnitude of change among different species or colour types or, more importantly, to determine whether seasonal colour differences are perceivable by the birds.
Mechanical and physical properties and colour differences were characterized.
Instrumental colour differences between sausages were mainly due to species.
However, our findings suggest that these changes have not contributed to coat-colour differences among tuco-tucos because no amino acid replacement was associated with pigmentation phenotype in a simple way.
That's a peculiar way to look at the show, considering Star Trek featured the first interracial kiss on American TV and numerous episodes were allegories about the evils of racism – specifically the episode Let That Be Your Last Battlefield, an unsubtle instalment from the third and final season in which aliens with half-white and half-black faces squabble over their skin-colour differences.
