Results 161 to 170 of about 13,724 (192)
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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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Comparative hemostasis: Studies on elasmobranchs
Comparative Biochemistry and Physiology Part A: Physiology, 1972Abstract 1. 1. Elasmobranch blood contains thrombocytes, which are agglutinated by thrombin but not by ADP. Dogfish thrombocytes appear to adhere to dogfish collagen. 2. 2. Elasmobranch blood clots very slowly often being still uncoagulated after 48 hr. 3. 3. Adding calcium accelerates elasmobranch clotting.
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2015
1. Introduction 2. Overview of the Elasmobranch Gill 3. Evolution of the Gill: Elasmobranch Gill Structure in Relation to Other Fishes 4. Elasmobranch Versus Teleost Ventilation 5. Details of the Elasmobranch Gill 5.1. Gross Morphology – Unique Features 5.2. Gill Vasculature 5.3. The Gill Epithelium 6.
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1. Introduction 2. Overview of the Elasmobranch Gill 3. Evolution of the Gill: Elasmobranch Gill Structure in Relation to Other Fishes 4. Elasmobranch Versus Teleost Ventilation 5. Details of the Elasmobranch Gill 5.1. Gross Morphology – Unique Features 5.2. Gill Vasculature 5.3. The Gill Epithelium 6.
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2011
Few studies of sex differentiation in elasmobranchs exist. Chieffi's comparative work on Torpedo ocel/ata, T. marmora/a, and Scy!iorhinus canicula are the most complete, and his comparisons with other published accounts of sex differentiation (Picon 1962) show parallels.
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Few studies of sex differentiation in elasmobranchs exist. Chieffi's comparative work on Torpedo ocel/ata, T. marmora/a, and Scy!iorhinus canicula are the most complete, and his comparisons with other published accounts of sex differentiation (Picon 1962) show parallels.
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Spermatogenesis in Elasmobranchs
International ...Sourdaine, Pascal, Jeanne, Fabian
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Electrophysiology of the Elasmobranch Stomach
Science, 1959A consequence of the recent study of the mechanism of gastric secretion has been the presumption, implicit ( 1 ) if not explicit ( 2 ), that the distinctive gastric transmucosal potential has a fundamental role in the formation of hydrochloric acid.
C, ADRIAN, M, HOGBEN
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The Acoustical Biology of Elasmobranchs
Environmental Biology of Fishes, 2001A report on the auditory capabilities and their associated functions of elasmobranch fishes along with a brief review of the physics of underwater sound as it relates to hearing by fishes is provided. The inner ears of elasmobranchs possess structures that are no different from other fishes, except for an enlarged macula neglecta, which is unique among
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