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Effects of EMFs from Undersea Power Cables on Elasmobranchs and Other Marine Species.
, 2011 Timothy C. Tricas, Andrew B. Gill
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Forebrain Organization in Elasmobranchs
Brain, Behavior and Evolution, 2012It has long been known that many elasmobranch fishes have relatively large brains. The telencephalon, in particular, has increased in size in several groups, and as a percent of total brain weight, it is as large as in some mammals. Little is known, however, about the organization, connections, and functions of the telencephalon in elasmobranchs. Early
Michael H, Hofmann, R Glenn, Northcutt
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Nature, 1958
So long ago as 1858, Staedeler and Frerichs1 discovered the presence of large amounts of urea in three species of elasmobranch fishes. Many more have been examined since that time, and it is known to-day that many, and probably all marine, elasmobranchs, including the Holocephali, contain 2–2.5 per cent of urea in their blood and tissues.
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So long ago as 1858, Staedeler and Frerichs1 discovered the presence of large amounts of urea in three species of elasmobranch fishes. Many more have been examined since that time, and it is known to-day that many, and probably all marine, elasmobranchs, including the Holocephali, contain 2–2.5 per cent of urea in their blood and tissues.
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The elasmobranch pupillary response
Vision Research, 1971Abstract The rate and extent of the pupillary response to light and darkness were determined for a variety of sharks and rays. Dilation required 1–60 min and constriction 1–30 min, depending on the species. All responses were non-consensual. The dilator muscle was controlled by the third cranial nerve, which probably exerts a constant dilatory tonus ...
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Morphological abnormalities in elasmobranchs
Journal of Fish Biology, 2015A total of 10 abnormal free‐swimming (i.e. post‐birth) elasmobranchs are reported from The (Persian–Arabian) Gulf, encompassing five species and including deformed heads, snouts, caudal fins and claspers. The complete absence of pelvic fins in a milk shark Rhizoprionodon acutus may be the first record in any elasmobranch. Possible causes, including the
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Journal of Experimental Zoology, 1990
Man has been fascinated with elasmobranchs — the sharks, skates and rays — for centuries. The visual sense of these sometimes-dangerous creatures has been much maligned; elasmobranchs have been described as seeing poorly and only at night. Since the last large review on vision in elasmobranchs (Gruber and Cohen, 1978), the field has expanded greatly ...
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Man has been fascinated with elasmobranchs — the sharks, skates and rays — for centuries. The visual sense of these sometimes-dangerous creatures has been much maligned; elasmobranchs have been described as seeing poorly and only at night. Since the last large review on vision in elasmobranchs (Gruber and Cohen, 1978), the field has expanded greatly ...
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Corticosteroids in plasma of elasmobranchs
Comparative Biochemistry and Physiology Part A: Physiology, 1972Abstract 1. 1. Free corticosteroids were quantified by double isotope derivative assay in thirteen plasma samples from seven species of elasmobranchs. 2. 2. In each instance, four batoids and three selachians, 1α-hydroxycortico-sterone was the principal plasmatic corticosteroid. 3. 3.
B, Truscott, D R, Idler
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2019
This chapter looks into the differences and similarities between the two groups of fish: the teleosts and the elasmobranchs. In the data analyses done so far in this volume, the fish most considered were the teleosts (Teleostei), which represent by far the dominant group, in terms of both biomass and living number of species.
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This chapter looks into the differences and similarities between the two groups of fish: the teleosts and the elasmobranchs. In the data analyses done so far in this volume, the fish most considered were the teleosts (Teleostei), which represent by far the dominant group, in terms of both biomass and living number of species.
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Journal of Experimental Zoology, 1990
The teleost eye, which is commonly used as a model of the typical aquatic eye, is described as having a spherical lens of elevated equivalent refractive index and an accommodative ability involving lens movement toward the retina. The question of lens aberrations, particularly longitudinal spherical aberration, is important because the lens is ...
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The teleost eye, which is commonly used as a model of the typical aquatic eye, is described as having a spherical lens of elevated equivalent refractive index and an accommodative ability involving lens movement toward the retina. The question of lens aberrations, particularly longitudinal spherical aberration, is important because the lens is ...
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Relative Eye Size in Elasmobranchs
Brain, Behavior and Evolution, 2007Variation in relative eye size was investigated in a sample of 46 species of elasmobranch, 32 species of sharks and 14 species of batoids (skates and rays). To get a measure of eye size relative to body size, eye axial diameter was scaled with body mass using least-squares linear regression, using both raw species data, where species are treated as ...
Lisney, Thomas J., Collin, Shaun P.
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