Teasing Apart the Many Effects of Lighting Environment on Opsin Expression and Foraging Preference in Bluefin Killifish

2010 ◽  
Vol 176 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Rebecca C. Fuller ◽  
Leslie A. Noa ◽  
Reid S. Strellner
Keyword(s):  
Opsin Expression ◽  
Foraging Preference ◽  
Lighting Environment ◽  
Bluefin Killifish ◽  
The Many

GENETICS, LIGHTING ENVIRONMENT, AND HERITABLE RESPONSES TO LIGHTING ENVIRONMENT AFFECT MALE COLOR MORPH EXPRESSION IN BLUEFIN KILLIFISH, LUCANIA GOODEI

Evolution ◽  
2004 ◽  
Vol 58 (5) ◽  
pp. 1086 ◽  
Author(s):  
Rebecca C. Fuller ◽  
Joseph Travis
Keyword(s):  
Color Morph ◽  
Lighting Environment ◽  
Lucania Goodei ◽  
Bluefin Killifish

Population variation in opsin expression in the bluefin killifish, Lucania goodei : a real-time PCR study

2004 ◽  
Vol 190 (2) ◽  
pp. 147-154 ◽  
Author(s):  
R. C. Fuller ◽  
K. L. Carleton ◽  
J. M. Fadool ◽  
T. C. Spady ◽  
J. Travis
Keyword(s):  
Real Time ◽  
Real Time Pcr ◽  
Population Variation ◽  
Opsin Expression ◽  
Lucania Goodei ◽  
Bluefin Killifish

scholarly journals Using electroretinograms and multi-model inference to identify spectral classes of photoreceptors and relative opsin expression levels

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3595 ◽  
Author(s):  
Nicolas Lessios
Keyword(s):  
Visual System ◽  
Spectral Sensitivity ◽  
Structural Parameters ◽  
Photoreceptor Cells ◽  
Physical Parameters ◽  
Model Framework ◽  
Opsin Expression ◽  
Model Inference ◽  
Alternative Hypotheses ◽  
Bluefin Killifish

Understanding how individual photoreceptor cells factor in the spectral sensitivity of a visual system is essential to explain how they contribute to the visual ecology of the animal in question. Existing methods that model the absorption of visual pigments use templates which correspond closely to data from thin cross-sections of photoreceptor cells. However, few modeling approaches use a single framework to incorporate physical parameters of real photoreceptors, which can be fused, and can form vertical tiers. Akaike’s information criterion (AICc) was used here to select absorptance models of multiple classes of photoreceptor cells that maximize information, given visual system spectral sensitivity data obtained using extracellular electroretinograms and structural parameters obtained by histological methods. This framework was first used to select among alternative hypotheses of photoreceptor number. It identified spectral classes from a range of dark-adapted visual systems which have between one and four spectral photoreceptor classes. These were the velvet worm,Principapillatus hitoyensis, the branchiopod water flea,Daphnia magna, normal humans, and humans with enhanced S-cone syndrome, a condition in which S-cone frequency is increased due to mutations in a transcription factor that controls photoreceptor expression. Data from the Asian swallowtail,Papilio xuthus, which has at least five main spectral photoreceptor classes in its compound eyes, were included to illustrate potential effects of model over-simplification on multi-model inference. The multi-model framework was then used with parameters of spectral photoreceptor classes and the structural photoreceptor array kept constant. The goal was to map relative opsin expression to visual pigment concentration. It identified relative opsin expression differences for two populations of the bluefin killifish,Lucania goodei. The modeling approach presented here will be useful in selecting the most likely alternative hypotheses of opsin-based spectral photoreceptor classes, using relative opsin expression and extracellular electroretinography.

scholarly journals Diurnal lighting patterns and habitat alter opsin expression and colour preferences in a killifish

2013 ◽  
Vol 280 (1763) ◽  
pp. 20130796 ◽  
Author(s):  
Ashley M. Johnson ◽  
Shannon Stanis ◽  
Rebecca C. Fuller
Keyword(s):  
Diurnal Variation ◽  
Population Variation ◽  
Colour Pattern ◽  
Opsin Expression ◽  
Diurnal Cycles ◽  
Lighting Conditions ◽  
Visual Systems ◽  
Habitat Variation ◽  
Bluefin Killifish ◽  
Colour Preferences

Spatial variation in lighting environments frequently leads to population variation in colour patterns, colour preferences and visual systems. Yet lighting conditions also vary diurnally, and many aspects of visual systems and behaviour vary over this time scale. Here, we use the bluefin killifish ( Lucania goodei ) to compare how diurnal variation and habitat variation (clear versus tannin-stained water) affect opsin expression and the preference to peck at different-coloured objects. Opsin expression was generally lowest at midnight and dawn, and highest at midday and dusk, and this diurnal variation was many times greater than variation between habitats. Pecking preference was affected by both diurnal and habitat variation but did not correlate with opsin expression. Rather, pecking preference matched lighting conditions, with higher preferences for blue at noon and for red at dawn/dusk, when these wavelengths are comparatively scarce. Similarly, blue pecking preference was higher in tannin-stained water where blue wavelengths are reduced. In conclusion, L. goodei exhibits strong diurnal cycles of opsin expression, but these are not tightly correlated with light intensity or colour. Temporally variable pecking preferences probably result from lighting environment rather than from opsin production. These results may have implications for the colour pattern diversity observed in these fish.

Identifying suboptimalities with factorial model comparison

2018 ◽  
Vol 41 ◽  
Author(s):  
Wei Ji Ma
Keyword(s):  
Experimental Design ◽  
Model Comparison ◽  
Process Models ◽  
Multiple Forms ◽  
Factorial Experimental Design ◽  
Factorial Model ◽  
Multiple Components ◽  
The Many

AbstractGiven the many types of suboptimality in perception, I ask how one should test for multiple forms of suboptimality at the same time – or, more generally, how one should compare process models that can differ in any or all of the multiple components. In analogy to factorial experimental design, I advocate for factorial model comparison.

Representing utility and deploying the body

2020 ◽  
Vol 43 ◽  
Author(s):  
David Spurrett
Keyword(s):  
Functional Activity ◽  
Degrees Of Freedom ◽  
The Body ◽  
Target Article ◽  
Processing Demands ◽  
The Many

Abstract Comprehensive accounts of resource-rational attempts to maximise utility shouldn't ignore the demands of constructing utility representations. This can be onerous when, as in humans, there are many rewarding modalities. Another thing best not ignored is the processing demands of making functional activity out of the many degrees of freedom of a body. The target article is almost silent on both.

The many faces of obligation

2020 ◽  
Vol 43 ◽  
Author(s):  
Michael Tomasello
Keyword(s):  
Third Party ◽  
The Many ◽  
Sense Of Obligation

Abstract My response to the commentaries focuses on four issues: (1) the diversity both within and between cultures of the many different faces of obligation; (2) the possible evolutionary roots of the sense of obligation, including possible sources that I did not consider; (3) the possible ontogenetic roots of the sense of obligation, including especially children's understanding of groups from a third-party perspective (rather than through participation, as in my account); and (4) the relation between philosophical accounts of normative phenomena in general – which are pitched as not totally empirical – and empirical accounts such as my own. I have tried to distinguish comments that argue for extensions of the theory from those that represent genuine disagreement.

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