1989 Fiscal Year Final Research Report Summary
Comparative Study on Visual Processing in Arthropod Eyes
| Project/Area Number |
62480018
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
動物発生・生理学
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| Research Institution | Kyushu University |
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Principal Investigator |
TATEDA Hideki Kyushu Univ., Fac. of Sci., Prof., 理学部, 教授 (10037179)
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| Co-Investigator(Kenkyū-buntansha) |
MIZUNAMI Makoto Kyushu Univ., Fac. of Sci., Assistant Prof., 理学部, 助手 (30174030)
ICHIKAWA Toshio Kyushu Univ., Fac. of Sci., Assistant Prof., 理学部, 助手 (50136420)
TOH Yoshihiro Kyushu Univ., Fac. of Sci., Associate Prof., 理学部, 助教授 (60037265)
MIZUNAMI Makoto Kyushu Univ., Fac. of Sci., Assistant Prof. (30174030)
MIZUNAMI Makoto Kyushu Univ., Fac. of Sci., Assistant Prof. (30174030)
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| Project Period (FY) |
1987 – 1989
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| Keywords | Arthropod / Insect / Spider / Vision / Visual Information Processing / Ocellus / Movement Detection / Color Discrimination |
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| Research Abstract |
Information processing in the ocellar system has been examined in four species of arthropods. Many insects possess two or three ocelli on their frontal part of the head in addition to a pair of compound eyes, and they are called dorsal ocelli. The dorsal ocelli are thought to contribute to control of locomotion and flight under weak light condition. In the present study a neural pathway from the dorsal ocellus to the thoracic motor center was morphologically and physiologically identified in the cockroach Periplaneta americana. A neural presented and discussed. The photoreceptor of the larva of the holometabolous insect consists of several ocelli located on either side of the head, which are called lateral ocelli. Lateral ocellar systems of two species of larvae with distinct visual behavior have been examined. A larva of the tiger beetle Cicindela chinensis ambushes its preys in a burrow and catch them by visual clues. A larva of the swallowtail butterfly Papilio xuthus wanders slowly for fresh green leaves.
Many movement sensitive visual interneurons were identified in the ocellar neuropil in the tiger beetle larva, whereas many color opponent neurons were identified in that of the swallowtail butterfly larva. Neural mechanism for movement detection and color discrimination were analyzed in these larval insects. Movement detection of the ocellar system of the jumping spider Hasarius adansoni were also examined with that of the tiger beetle larva.
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