Browsing by Author "Johnsen, S"
Now showing items 1-3 of 3
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Spatial vision in the purple sea urchin Strongylocentrotus purpuratus (Echinoidea).
(J Exp Biol, 2010-01-15)Recent evidence that echinoids of the genus Echinometra have moderate visual acuity that appears to be mediated by their spines screening off-axis light suggests that the urchin Strongylocentrotus purpuratus, with its higher ... -
Testosterone, signal coloration, and signal color perception in male zebra finch contests.
(Ethology : formerly Zeitschrift fur Tierpsychologie, 2022-02)Many animals use assessment signals to resolve contests over limited resources while minimizing the costs of those contests. The carotenoid-based orange to red bills of male zebra finches (Taeniopygia guttata) are thought ... -
Variation in carotenoid-containing retinal oil droplets correlates with variation in perception of carotenoid coloration
(Behavioral Ecology and Sociobiology, 2020-07-01)© 2020, The Author(s). Abstract: In the context of mate choice, males may vary continuously in their expression of assessment signals, typically reflecting information about variation in mate quality. Similarly, females ...
