منابع مشابه
Light and vision in the deep-sea benthos: II. Vision in deep-sea crustaceans.
Using new collecting techniques with the Johnson-Sea-Link submersible, eight species of deep-sea benthic crustaceans were collected with intact visual systems. Their spectral sensitivities and temporal resolutions were determined shipboard using electroretinography. Useable spectral sensitivity data were obtained from seven species, and in the dark-adapted eyes, the spectral sensitivity peaks w...
متن کاملRetinal specializations in the eyes of deep-sea teleosts
Although living beyond the penetration limits of sunlight, many deep-sea teleosts possess large eyes, lenses capable of accommodation, and various adaptations for increasing sensitivity and extending their visual field. However, little is known of the extent of the visual field and whether the spatial resolving power of the eye is constant across the retina. In order to examine whether these fi...
متن کاملEffects of Light Adaptation on the Temporal Resolution of Deep-sea Crustaceans.
The effects of light adaptation on flicker fusion frequency were examined in the photoreceptors of 13 species of deep-sea crustaceans. Light adaptation produced a significant increase in the maximum critical flicker fusion frequency (CFF(max)) in 7 species-all 6 species of euphausiids in the study, and 1 species of oplophorid (Group 1). This is the first example of an increase in temporal resol...
متن کاملShort-term toxicity of 1-methylnaphthalene to Americamysis bahia and 5 deep-sea crustaceans.
There are few studies that have evaluated hydrocarbon toxicity to vertically migrating deep-sea micronekton. Crustaceans were collected alive using a 9-m2 Tucker trawl with a thermally insulated cod end and returned to the laboratory in 10 °C seawater. Toxicity of the polycyclic aromatic hydrocarbon 1-methylnaphthalene to Americamysis bahia, Janicella spinacauda, Systellaspis debilis, Sergestes...
متن کاملVisual eyes: a quantitative analysis of the photoreceptor layer in deep-sea sharks.
The marine environment presents unique visual challenges for a range of organisms, particularly those dwelling at great depths, where sunlight may either be absent or drop to very low levels. Under these environmental conditions, the visual system must maximise light absorption in order to enhance the detection of prey, predators and potential mates. Using stereological analysis of retinal whol...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1937
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1537540