Document Detail

Spectral sensitivity, luminous sensitivity, and temporal resolution of the visual systems in three sympatric temperate coastal shark species.
MedLine Citation:
PMID:  25319537     Owner:  NLM     Status:  Publisher    
We used electroretinography (ERG) to determine spectral and luminous sensitivities, and the temporal resolution (flicker fusion frequency, FFF) in three sympatric (but phylogenetically distant) coastal shark species: Carcharhinus plumbeus (sandbar shark), Mustelus canis (smooth dogfish), and Squalus acanthias (spiny dogfish). Spectral sensitivities were similar (range ~400-600 nm, peak sensitivity ~470 nm), with a high likelihood of rod/cone dichromacy enhancing contrast discrimination. Spiny dogfish were significantly less light sensitive than the other species, whereas their FFF was ~19 Hz at maximum intensities; a value equal to that of sandbar shark and significantly above that of smooth dogfish (~9-12 Hz). This occurred even though experiments on spiny dogfish were conducted at 12 versus 25 °C and 20 °C for experiments on sandbar shark and smooth dogfish, respectively. Although spiny dogfish have a rod-dominated retina (rod:cone ratio 50:1), their visual system appears to have evolved for a relatively high temporal resolution (i.e., high FFF) through a short integration time, with the requisite concomitant reduction in luminous sensitivity. Our results suggest adaptive plasticity in the temporal resolution of elasmobranch visual systems which reflects the importance of the ability to track moving objects such as mates, predators, or prey.
Mieka Kalinoski; Amy Hirons; Andrij Horodysky; Richard Brill
Related Documents :
3161877 - Correlation between multiple phosphorylation of gizzard myosin light chains and actin-a...
6257857 - Rapid incorporation in vivo of intracerebrally injected 32pi into polyphosphoinositides...
23646877 - Synthesis of uniform cds nanospheres/graphene hybrid nanocomposites and their applicati...
8224867 - Abundant mrnas in the squid light organ encode proteins with a high similarity to mamma...
10968217 - Neural compensation for mechanical differences between hand and foot during coupled osc...
22938327 - Development of a compact and long range xyθ(z) nano-positioning stage.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-10-16
Journal Detail:
Title:  Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology     Volume:  -     ISSN:  1432-1351     ISO Abbreviation:  J. Comp. Physiol. A Neuroethol. Sens. Neural. Behav. Physiol.     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-10-16     Completed Date:  -     Revised Date:  2014-10-17    
Medline Journal Info:
Nlm Unique ID:  101141792     Medline TA:  J Comp Physiol A Neuroethol Sens Neural Behav Physiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Effect of dietary supplementation with resveratrol on nutrient digestibility, methanogenesis and rum...
Next Document:  Dichromatic vision in a fruit bat with diurnal proclivities: the Samoan flying fox (Pteropus samoens...