Visual Sensitivity of Deepwater Fishes in Lake Superior

摘要: The predator-prey interactions in the offshore food web of Lake Superior have been well documented, but sensory systems mediating these remain unknown. deepwater sculpin, (Myoxocephalus thompsoni), siscowet (Salvelinus namaycush siscowet), and kiyi (Coregonus kiyi) inhabit low light level environments. To investigate potential role vision interactions, electroretinography was used to determine visual sensitivity for each species. Spectral curves revealed peak at 525 nm species which closely corresponds prevalent downwelling spectrum depth. if sufficient available mediate correlated with intensity construct depth profiles Sufficient daytime irradiance exists approximately 325 m 355 sculpin during summer months. Under full moon conditions, elicit ERG response 30 45 sculpin. Visual are therefore possible depths times when organisms overlap water column indicating that may play a far greater deep freshwater lakes than had previously documented.