Eyes, eye stalks and the visual world of semi-terrestrial crabs

@article{Zeil1986EyesES,
  title={Eyes, eye stalks and the visual world of semi-terrestrial crabs},
  author={Jochen Zeil and Gerbera Nalbach and H. -O. Nalbach},
  journal={Journal of Comparative Physiology A},
  year={1986},
  volume={159},
  pages={801-811}
}
Summary1.We used in vivo optical techniques to study compound eye organisation and the extent of eye stalk development in 17 species of semi-terrestrial crabs (Brachyura).2.‘Narrow-fronted’ species (Ocypodidae, Mictyridae) which have their eyes close together on elongated, vertically oriented eye stalks have a narrow acute zone for vertical resolving power along the horizon (Figs. 2, 4, 6), while ‘broad-fronted’ species (Grapsidae, Xanthidae, Portunidae) which have their eyes far apart on short… 

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References

SHOWING 1-10 OF 34 REFERENCES

ON THE EVOLUTION OF ELONGATE OCULAR PEDUNCLES BY THE BRACHYURA

The distribution of elongate peduncles within the Brachyura; the selective pressures leading to their development; and the structural modifications of the carapace that have resulted from their evolution are discussed.

Maps of the acute zones of fly eyes

It seems likely that there are two kinds of acute zone in insect eyes, one concerned with forward flight and the other with the detection and capture of other insects.

Regionalization in the eye of the crabLeptograpsus variegatus: Eye movements evoked by a target moving in different parts of the visual field

  • D. Sandeman
  • Biology
    Journal of comparative physiology
  • 2004
Measurements of the interommatidial angles and facet diameters around the eye do not reveal differences in the optical array which could explain the larger optokinetic responses which are evoked by movement at the side, of the eye.

Histologische Untersuchungen zum Bau des Auges von Ocypode cursor (Brachyura)

  • P. Kunze
  • Biology
    Zeitschrift für Zellforschung und Mikroskopische Anatomie
  • 2004
SummaryIn the ommatidium of the apposition eye of Ocypode cursor eight retinula cells are found, where the eighth accessory cell has a characteristic shape and position distinct from the other seven

The tree-climbing crabs of Trinidad

An annotated list of the brachyuran and anomuran tree-climbing crabs of Trinidad (West Indies) is presented and Aratus was found to feed mainly on algae and decayed wood, not on mangrove leaves.

Visual system ofNotonecta glauca: A neuron sensitive to movement in the binocular visual field

  • R. Schwind
  • Biology
    Journal of comparative physiology
  • 2004
The observed region of high sensitivity to moving spots is large and is found within the binocular field, and an object moving in the plane of the water surface at any distance would excite the neuron maximally if it were of the appropriate size.

Über die facettenaugen von land- und wasserbewohnenden crustacean

  • H. Thiele
  • Biology
    Zeitschrift für Morphologie der Tiere
  • 2004
Terrestrial crustaceans have larger eyes, more o mmatidia and smaller angles of ommatidial divergence than their nearest aquatic relatives, but the speed of the eyes is greater in aquatic than in terrestrial Crustacea.

A comparative study of some aspects of the biology and ecology of Sesarma catenata Ort. and Cyclograpsus punctatus M.Edw., with additional observations on Sesarma meinerti De Man

The present exploratory study of these two species has been undertaken to enhance the knowledge of their biology as well as the understanding of the relations between these two very similar animals which live in such close proximity one to another.

Geometrical optics of theNotonecta eye: Adaptations to optical environment and way of life

  • R. Schwind
  • Physics
    Journal of comparative physiology
  • 2004
The extent to which the properties of movement-sensitive interneurons (Schwind, 1978) are based on the measured gradients in the optical lattice is discussed.