Abstract：
:Rod spectral sensitivity data (λmax ), measured by microspectrophotometry, were compiled for 403 species of ray-finned fishes in order to examine four hypothesized predictors of rod spectral sensitivity (depth, habitat, diet and temperature). From this database, a subset of species that were known to be adults and available on a published phylogeny (n = 210) were included in analysis, indicating rod λmax values averaging 503 nm and ranging from 477 to 541 nm. Linear models that corrected for phylogenetic relatedness showed that variation in rod sensitivity was best predicted by habitat and depth, with shorter wavelength λmax values occurring in fishes found offshore or in the deep sea. Neither diet, nor the interaction of diet and habitat, had significant explanatory power. Although temperature significantly correlated with rod sensitivity, in that fishes in temperate latitudes had longer wavelength rod λmax values than those in tropical latitudes, sampling inequity and other confounds require the role of the temperature to be studied further. Together, these findings indicate that fish rod λmax is influenced by several ecological factors, suggesting that selection can act on even small differences in fish spectral sensitivity.
journal_name
J Fish Bioljournal_title
Journal of fish biologyauthors
Schweikert LE,Caves EM,Solie SE,Sutton TT,Johnsen Sdoi
10.1111/jfb.13859subject
Has Abstractpub_date
2019-07-01 00:00:00pages
179-185issue
1eissn
0022-1112issn
1095-8649journal_volume
95pub_type
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