Investigating photoreceptor densities, potential visual acuity, and cone mosaics of shallow water, temperate fish species
| Autor: | D.E. Hunt, Jennifer M. Cobcroft, Giles Thomas, N.J.F. Rawlinson |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Sillago flindersi
genetic structures Sense organ Lophonectes gallus Visual Acuity Zoology Context (language use) Cell Count Eye Optics Trachurus declivis Retinal Rod Photoreceptor Cells Minimum separable angle Lens Crystalline Potential visual acuity Vision in fishes Animals Vision Ocular Cone mosaic Teleostei Analysis of Variance biology business.industry Fishes biology.organism_classification Cone density Sensory Systems Bycatch Ophthalmology Retinal Cone Photoreceptor Cells sense organs Rod density business |
| Zdroj: | Vision research. 111 |
| ISSN: | 1878-5646 |
| Popis: | The eye is an important sense organ for teleost species but can vary greatly depending on the adaption to the habitat, environment during ontogeny and developmental stage of the fish. The eye and retinal morphology of eight commonly caught trawl bycatch species were described: Lepidotrigla mulhalli; Lophonectes gallus; Platycephalus bassensis; Sillago flindersi; Neoplatycephalus richardsoni; Thamnaconus degeni; Parequula melbournensis; and Trachurus declivis. The cone densities ranged from 38 cones per 0.01 mm(2) for S. flindersi to 235 cones per 0.01 mm(2) for P. melbournensis. The rod densities ranged from 22800 cells per 0.01 mm(2) for L. mulhalli to 76634 cells per 0.01 mm(2) for T. declivis and potential visual acuity (based on anatomical measures) ranged from 0.08 in L. gallus to 0.31 in P. melbournensis. Higher rod densities were correlated with maximum habitat depths. Six species had the regular pattern of four double cones arranged around a single cone in the photoreceptor mosaic, while T. declivis had only rows of double cones. P. melbournensis had the greatest potential ability for detecting fine detail based on eye anatomy. The potential visual acuity estimates and rod densities can be applied to suggest the relative detection ability of different species in a commercial fishing context, since vision is a critical sense in an illuminated environment for perceiving an oncoming trawl. |
| Databáze: | OpenAIRE |
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