Results 151 to 160 of about 1,542 (192)

Photophores of Porichthys notatus: Ultrastructure of innervation

The Anatomical Record, 1969
AbstractPhotophores in Porichthys notatus are bioluminescent organs composed of a lens, photogenic tissue, and an underlying reflector. Nerves penetrate through the reflector and branch, free of their Schwann cells, among the photogenic tissue elements. The tortuous pathways of axons have been followed by electron microscopical serial sections.
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GABA inhibition of luminescence from lantern shark (Etmopterus spinax) photophores

Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology, 2011
Photogenic organs (photophores) of the velvet belly lantern shark (Etmopterus spinax) are under hormonal control, since melatonin (MT) and prolactin (PRL) trigger luminescence while α-melanocyte-stimulating hormone (α-MSH) prevents this light to be emitted.
Julien M, Claes, Jenny, Krönström, Susanne, Holmgren, Jérôme, Mallefet   +3 more
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Studies on photophores in the Euphausiacea

Sarsia, 1968
Abstract The present investigation concerns the adult morphology and histology of the photophores of some euphausiids and some notes on the development of the abdominal photophores of Meganyctiphanes norvegica. Some of the more important results are abstracted. The posterior cell mass inside the reflector layer is more complicated than earlier believed.
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Pharmacomorphological study of denervation induced by 6-hydroxydopamine in Porichthys photophores

Cell and Tissue Research, 1976
The effects of 6-hydroxydopamine (6-OHDA) on the bioluminescent response of Porichthys photophores were investigated as part of a pharmacological study of the neural control of luminescence in this fish. Subcutaneous injections of 6-OHDA induce a luminescent response similar to that of norepinephrine (NE), suggesting a sympathomimetic action.
M, Anctil, J F, Case
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The photophores of the squid family Cranchiidae (Cephalopoda: Oegopsida)

Journal of Zoology, 2002
AbstractExamples of the ocular, digestive gland and brachial end‐organ photophores of specimens from all 13 cranchiid genera are described. The cranchiine and taoniine subgroups have different ocular photophore morphologies, but very similar brachial end‐organs in adult females.
Herring, P.J., Dilly, P.N., Cope, C.
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An unusual squid paralarva (Cephalopoda) with tentacular photophores

1993
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Loffler, D L, Vecchione, Michael
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Effects of ouabaïn on isolated photophores of luminescent fish

Comparative Biochemistry and Physiology Part C: Comparative Pharmacology, 1988
Abstract 1. Isolated photophores from Porichthys, Argyropelecus and Maurolicus consume oxygen at a rate of 0.10 ± 0.01, 0.85 ± 0.11 and 0.89 ± 0.17 nmol min−1 respectively in saline at 20°C. 2. Ouabain 10−4mol l−1 reduces the resting oxygen consumption of isolated photophore of Porichthys by 38% and by 30% for Argyropelecus without inducing ...
J. Mallefet, F. Baguet
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The comparative morphology of hepatic photophores in decapod Crustacea

Journal of the Marine Biological Association of the United Kingdom, 1981
The hepatic photophores of species ofSergestes(organs of Pesta) contain fluorescent paracrystalline platelets which are the sources of the luminescence. The cells containing these crystals are contiguous with cells filled with lipid droplets which act as a diffuse reflector.
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The filter in photophores of the deep-sea fish Neoscopelus (Neoscopelidae: Myctophiformes) and its role in counterillumination spectra.

Journal of Fish Biology
Neoscopelus is a genus of deep-sea fishes with ventral-lateral photophores, likely used for counterillumination. In this study, we report a novel functional structure of spectral filter in the bioluminescence mechanism of Neoscopelus microchir ...
José Paitio, Daichi Yano, Teerapong Seesamut, Gaku Mizuno, Masakazu Iwasaka, Shiro Takei, Yuichi Oba   +6 more
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Functions of Scales and Photophores in Mesopelagic Luminescent Sharks

Acta Zoologica, 1985
AbstractIn sharks bioluminescence is only known from the family Squalidae. It evolved independently in two out of six squalid subfamilies, Dalatiinae and Etmopterinae. The distribution of photophores was mapped in several species. It is suggested that in the Dalatiinae, which do not school, but migrate vertically, luminescence serves as ventral ...
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