S. Yamashita

Publications40
h-index11
Citations447
Highly Influential Citations12
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Spectral sensitivities of jumping spider eyes
TLDR
Spectral sensitivities of the anterior lateral, posterior lateral and anterior median eyes of the jumping spider have been studied by recording electroretinograms (ERGs) and receptor potentials, suggesting that each receptor layer contains a different photopigment.
Molecular Evolution of Arthropod Color Vision Deduced from Multiple Opsin Genes of Jumping Spiders
TLDR
Phylogenetic analyses of jumping spider opsins revealed a birth and death process of color vision evolution in the arthropod lineage, and sequence comparison between jumping spider Rh3 and the shorter wavelength-sensitive opsins of insects predicted that an opsin of the ancestralArthropod had the lysine residue responsible for UV sensitivity.
Photoreceptor Cells in the Spider Eye: Spectral Sensitivity and Efferent Control
Most species of spiders have four pairs of simple eyes arranged in two rows, anterior and posterior, in the frontal part on the prosoma. These eyes are referred to as the anterior median, anterior…
Learning and discrimination of colored papers in jumping spiders (Araneae, Salticidae)
TLDR
It seems that jumping spiders can discriminate the blue, green, yellow and red papers by their hue, although brightness may also be used together with the color cue to discriminate colored papers.
Isolation, Characterization and Application to Off-Gas Treatment of Toluene-Degrading Bacteria
TLDR
Acinetobacter genospecies Tol 5 showed a sufficiently high ability in toluene elimination within 24 h after starting the operation without preliminary operation for immobilization, suggesting that this strain was effective to shorten the adaptation period, which had been considerably long on the TBAB inoculated with the original activated sludge.
Spectral Sensitivities of the Anterior Median Eyes of the Orb Web Spiders, Argiope Bruennichii and A. Amoena
Spectral sensitivities of the anterior median eyes of the orb web spiders, Argiope bruennichii and A. amoena have been studied by recording extracellular ERGs and intracellular receptor potentials.…
Cerebral photosensitive neurons in the orb weaving spiders,Argiope bruennichii andA. amoena
Summary1.The frequency of efferent impulses in the optic nerves of the orb weaving spidersArgiope bruennichii andA. amoena increased by illumination of the brain. Addition of 2 mmol/l Co2+, a…
Intracellular stainings of the large ocellar second order neurons in the cockroach
TLDR
The large ocellar second order neurons (L-neurons) in the cockroach, Periplaneta americana have been studied physiologically and morphologically by intracellular and whole nerve cobalt stainings.
Phototactic Behavior of Nocturnal and Diurnal Spiders: Negative and Positive Phototaxes
Abstract Phototactic behaviors of the garden spider Araneus ventricosus and the jumping spiders Menemerus confusus and Hasarius adansoni were examined as they walked on a Y-maze globe. On both dark-…
Efferent neural control in the eyes of orb weaving spiders
TLDR
Efferent spikes have been recorded from the optic nerves of the orb weaving spiders, Argiope bruennichii and A. amoena, indicating a diurnal periodicity which is maintained in constant darkness.
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