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Details van artikel 10 van 12 gevonden artikelen
| Titel: |
The effect of light- and dark-rearing on the development of the eyes of atlantic halibut (Hippoglossus hippoglossus) yolk-sac larvae |
| Auteur: |
Helvik, J. V. Karlsen, Ø. |
| Verschenen in: |
Marine & freshwater behaviour & physiology |
| Paginering: | Jaargang 28 (1996) nr. 1-2 pagina's 107-121 |
| Jaar: |
1996-07 |
| Inhoud: |
The development of the visual system in Atlantic halibut was studied from hatching until the time of first feeding by following the organogenesis of the retina and by analysing the resolving power at various stages. Larvae reared under continuous darkness were compared with larvae reared in 0.3 μEm-2 s-1 white light. The retinal morphology in the two groups followed the same pattern of development. This was also true for the thickness of the various cell layers, lens diameter and photoreceptor density. The only significant difference we observed was that the inner plexiform layer was 1.5% thicker in the light-reared group. Visual acuity calculated from the optomotoric response was about 5° for halibut larvae at the stage of first feeding. Visual acuity in this period, calculated from histological sections, was approximately 0.6°. Acuity was not different between the two groups. The results indicate that light is not a critical factor for normal morphogenesis of the retina of halibut to the time of first feeding. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 10 van 12 gevonden artikelen
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