Journal ArticleDOI
Underwater Daylight and Moonlight Measurements in the Eastern North Atlantic1
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TLDR
The R.R.S. "Discovery" as discussed by the authors provided the opportunity for short-term estimation of the penetration of daylight at midday into three regions of the eastern North Atlantic, evaluation of the fluctuations in the character of noonday light at depth in a restricted area over a 2-month period, and a determination of penetration of moonlight in this area at the full of the moon.Abstract:
SOND Cruise 1965 aboard the R.R.S. ‘Discovery’ afforded the opportunity for short-term estimation of the penetration of daylight at midday into three regions of the eastern North Atlantic, evaluation of the fluctuations in the character of noonday light at depth in a restricted area over a 2-month period, and a determination of the penetration of moonlight in this area at the full of the moon.read more
Citations
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Journal ArticleDOI
The ecology of cone pigments in teleost fishes
E.R. Loew,J. N. Lythgoe +1 more
TL;DR: The relevance of these findings to contrast enhancement, adaptation to rapid changes in spectral quality of the water, and formation of “ghost” pigments through opponancy is also discussed.
Book ChapterDOI
Evolutionary Adaptations of Fishes to the Photic Environment
F.W. Munz,W.N. McFarland +1 more
TL;DR: This chapter is concerned mainly with the evolutionary adaptation of visual systems in bony fishes living in aquatic environments, and shall concentrate on retinal mechanisms, especially on the receptors themselves.
Journal ArticleDOI
Midwater fishes in the eastern North Atlantic—I. Vertical distribution and associated biology in 30°N, 23°W, with developmental notes on certain myctophids
Julian Badcock,N. R. Merrett +1 more
TL;DR: The overall catches were dominated by non-migrants, and at depths greater that 200 m these comprised the most abundant species per depth at all times, while Cyclothone constituted the most most abundant genus sampled and provided greatest insight into distributional and biological detail.
Book ChapterDOI
Adaptations to the Deep-Sea Environment
Abstract: The world’s oceans cover some 70% of the surface of the globe, and of this area 75% is deeper than 3000 m Unaided, man can explore only the surface and edges of this mass of water; he requires diverse probes and samplers to investigate the habitat of deep-sea fishes
Book ChapterDOI
The Adaptation of Visual Pigments to the Photic Environment
TL;DR: In 1936 Clarke wrote: “These results [clear ocean water selectively transmits blue light] raise the question of the possibility of a shift in sensitivity of the eyes of a deep water fish towards the blue end of the spectrum”, which must be one of the most accurate in biology.
References
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Journal ArticleDOI
Light as an ecological factor
Journal Article
Submarine Illumination and the Twilight Movements of a Sonic Scattering Layer
TL;DR: It has long been recognized that many zooplankton organisms exist in distinct strata during the day and that they may undergo extensive diurnal vertical migrað tions as discussed by the authors.
Journal ArticleDOI
Submarine Illumination and the Twilight Movements of a Sonic Scattering Layer
Journal ArticleDOI
An Aspect of Euphausiid Ecology Revealed By Echo-Sounding in a Fjord 1)
TL;DR: In this article, a tagliche Auf-and-absteigen einer teilweise isolierten Gemeinschaft des Planktonkrebschens Euphausia pacifica wurde mittels Echolot in a kanadischen Fjord beobachtet.