scholarly journals The relationship between the position of the retinal area centralis and feeding behaviour in juvenile black bream Acanthopagrus butcheri (Sparidae: Teleostei)

2000 ◽  
Vol 355 (1401) ◽  
pp. 1183-1186 ◽  
Author(s):  
Julia Shand ◽  
Stephanie M. Chin ◽  
Alison M. Harman ◽  
Shaun P. Collin
Keyword(s):  
Feeding Behaviour ◽  
Ganglion Cell Layer ◽  
High Cell Density ◽  
Cell Layer ◽  
Retinal Ganglion ◽  
High Cell ◽  
Black Bream ◽  
Retinal Ganglion Cell Layer ◽  
Area Centralis ◽  
Acanthopagrus Butcheri

The topography of the neurons in the retinal ganglion cell layer of juvenile black bream Acanthopagrus butcheri changes during development. The region of high cell density, the area centralis (AC), relocates from a temporal (central) to a dorsal (peripheral) position within the dorso-temporal retinal quadrant. Toascertain whether the differences in the position of the AC during development are related to feeding behaviour, we monitored fishes that were given a choice of food. A range of feeding behaviour patterns was recorded in individual fishes. The smallest fishes (8-15mm standard length (SL)) took live food from the water column. Following weaning onto pellets, fishes exhibited a preference for taking food from either the substrate or the surface (but not both).When greater than 20 mm SL, a number of individuals then divided their time between surface and substrate feeding before all fishes became exclusive benthic feeders at a stage between 50 and 80 mm SL. Three individual fishes, for which behaviour patterns were categorized, were killed and the topography of the retinal ganglion cell layer analysed. A range of positions for the AC was found with the smallest fish (12mm SL) possessing a region of high cell density in the temporal retina. In a larger fish (70 mm SL), feeding from both the substrate and the surface, the AC was found in an intermediate dorso-temporal position. The AC of a fish (51mm SL) preferentially taking food from the substrate was located in a dorsal position.

Cell distributions in the retinal ganglion cell layer of adult Leptodactylid frogs after premetamorphic eye rotation

Development ◽  
1985 ◽  
Vol 89 (1) ◽  
pp. 159-173
Author(s):  
S. A. Dunlop ◽  
L. D. Beazley
Keyword(s):  
Ganglion Cell ◽  
Cell Density ◽  
Retinal Ganglion Cell ◽  
Ganglion Cell Layer ◽  
High Cell Density ◽  
Cell Layer ◽  
Retinal Ganglion ◽  
High Cell ◽  
Eye Rotation ◽  
Retinal Ganglion Cell Layer

In adult Limnodynastes dorsalis and Heleioporus eyrei regions of high cell density in the retinal ganglion cell layer are normally found along the nasotemporal axis and become apparent only after metamorphosis (Dunlop & Beazley, 1981; Coleman, Dunlop & Beazley, 1984). Eye rotations were performed from embryonic to mid-larval life and cell topography mapped after metamorphosis using cresyl violet-stained wholemounts. Mature cell distributions indicated that from stages equivalent to 30/31 in Xenopus (Nieuwkoop & Faber, 1956) alignment of high cell density regions had already been determined and developed to reflect the degree of eye rotation. We conclude that cell topography in the adult ganglion cell layer is determined from the time at which imagination of the eye cup nears completion. Furthermore, the correspondence in adults between alignment of high cell density regions and the orientation of the visuotectal projection suggests that these features could not be dissociated by manipulation of the developing eye.

The formation of the area centralis of the retinal ganglion cell layer in the chick

Development ◽  
1987 ◽  
Vol 100 (3) ◽  
pp. 411-420
Author(s):  
C. Straznicky ◽  
M. Chehade
Keyword(s):  
Ganglion Cell ◽  
Retinal Ganglion Cell ◽  
Ganglion Cell Layer ◽  
Cell Layer ◽  
Cell Loss ◽  
Retinal Ganglion ◽  
Retinal Periphery ◽  
Central Retina ◽  
Retinal Ganglion Cell Layer ◽  
Area Centralis

In adult domestic chickens, the neurones in the retinal ganglion cell layer are very unevenly disposed such that there is a sixfold increase in neurone density from the retinal edge to the retinal centre. The formation of the high ganglion-cell-density area centralis was studied on chick retinal wholemounts from the 8th day of incubation (E8) to 4 weeks after hatching (4WAH). The density of viable neurones and the number and the distribution of pyknotic neurones in the ganglion cell layer were estimated across the whole retina. Between E8 and E10, the distribution of neurones in the ganglion cell layer was anisodensitic with 53,000 mm-2 in the centre compared to 34,000 mm-2 in the periphery of the retina. Thereafter, a progressively steeper gradient of neurone density developed, which decreased from 24,000 mm-2 in the retinal centre to 6000 mm-2 at the retinal periphery by 4WAH. Neuronal pyknosis in the ganglion cell layer was observed between E9 and E17. From E11 onwards, consistently more pyknotic neurones were found in the peripheral than in the central retina. It was estimated that over the period of cell death approximately twice as many neurones died per unit area in the retinal periphery than in the centre. Retinal area measurements and estimation of neurone densities in the ganglion cell layer after the period of neurone generation and neurone death indicated differential retinal expansion, with more expansion in the peripheral than in the central retina. These observations allow us to conclude that the formation of the area centralis of the chick retina involves (1) slightly higher cell generation in the retinal centre, (2) higher rate of cell loss in the retinal periphery and (3) differential retinal expansion.

Long-Term Effect of Optic Nerve Axotomy on the Retinal Ganglion Cell Layer

2015 ◽  
Vol 56 (10) ◽  
pp. 6095 ◽  
Author(s):  
Francisco M. Nadal-Nicolás ◽  
Paloma Sobrado-Calvo ◽  
Manuel Jiménez-López ◽  
Manuel Vidal-Sanz ◽  
Marta Agudo-Barriuso
Keyword(s):  
Optic Nerve ◽  
Ganglion Cell ◽  
Retinal Ganglion Cell ◽  
Ganglion Cell Layer ◽  
Cell Layer ◽  
Term Effect ◽  
Retinal Ganglion ◽  
Long Term Effect ◽  
Retinal Ganglion Cell Layer

scholarly journals A cell population model of retinal ganglion cell layer thickness

2019 ◽  
Vol 19 (10) ◽  
pp. 41c
Author(s):  
Kara N Cloud ◽  
Min Chen ◽  
Jessica I. W. Morgan ◽  
Geoffrey K. Aguirre
Keyword(s):  
Ganglion Cell ◽  
Layer Thickness ◽  
Retinal Ganglion Cell ◽  
Cell Population ◽  
Population Model ◽  
Ganglion Cell Layer ◽  
Cell Layer ◽  
Retinal Ganglion ◽  
Retinal Ganglion Cell Layer ◽  
A Cell
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