Results 271 to 280 of about 65,697 (317)
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Osmotic balance in gastropod molluscs—I some marine and littoral gastropods
Comparative Biochemistry and Physiology, 1965Abstract 1. 1. Blood and urine concentrations of Turritella communis, Littorina saxatilis and other common littoral Gastropods were measured in normal, dilute and concentrated sea-waters and on exposure and reimmersion. The body fluids of active animals were isosmotic with the medium under all tolerated conditions and there was no evidence of ...
A C, Avens, M A, Sleigh
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2012
O estatólito, análogo aos otólitos, tem-se revelado como um instrumento importante para a determinação da idade e para estudos de crescimento em invertebrados. Localiza-se dentro dos orgãos de equilíbrio, os estatocistos. Apesar de terem sido já bem estudados na classe Cephalopoda, pouco se sabe atualmente sobre a sua estrutura, composição química e ...
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O estatólito, análogo aos otólitos, tem-se revelado como um instrumento importante para a determinação da idade e para estudos de crescimento em invertebrados. Localiza-se dentro dos orgãos de equilíbrio, os estatocistos. Apesar de terem sido já bem estudados na classe Cephalopoda, pouco se sabe atualmente sobre a sua estrutura, composição química e ...
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The Adaptive Significance of Gastropod Torsion
Evolution, 1966Unique among mollusks, the Gastropoda are characterized by a curious asymmetry, resulting from a rotation of the visceral hump and shell. Thus in the earlier stages of their embryonic development, gastropods have the same arrangement of parts as other mollusks, with the rudiments of the mantle cavity, gills, coelomic ducts, and associated structures at
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A phylogenetic classification of gastropod aquaporins
Marine Genomics, 2018Successful responses to the multifarious challenges of controlling water balance are critical for snails' survival in the great diversity of habitats they occupy. Advances are being made in understanding how such challenges are approached at the molecular level, including through the study of aquaporins, which are proteins functioning to facilitate the
D J, Colgan, R P, Santos
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Biological Reviews, 1983
Summary(I). Gastropods use chemoreception for a wide variety of behaviours including feeding, homing, escape from predators and a variety of social and reproductive behaviours. Chemoreception is used to locate distant food sources, and to discriminate between potential foods.
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Summary(I). Gastropods use chemoreception for a wide variety of behaviours including feeding, homing, escape from predators and a variety of social and reproductive behaviours. Chemoreception is used to locate distant food sources, and to discriminate between potential foods.
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What Are the Origins of Ecdysteroids in Gastropods?
General and Comparative Endocrinology, 1995Terrestrial gastropods contain ecdysteroids, the origins of which are unknown. Whether they are synthesized by the animals or they arise from the diet is an open question. To address this problem, labeled cholesterol and various molecules which are efficiently converted into ecdysone by arthropods were tested as possible ecdysone precursors in ...
M, Garcia, B, Griffond, R, Lafont
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Quaternary Structure of Gastropod Haemocyanin
Nature, 1972Three-dimensional image reconstruction shows haemocyanin to be made of three distinct parts. At the ends of the particle are a five-fold “collar” and a central “cap”. The cylindrical wall consists of sixty dimers which may be correlated with 120 oxygen binding sites.
J E, Mellema, A, Klug
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1992
Abstract Gastropods (snails and slugs) constitute by far the largest and most diverse class of Mollusca, with an estimated 40 000 marine, 3000 freshwater and 24 000 terrestrial species (Solem 1974). They are characterized by a distinct head with eyes and tentacles, and a usually coiled shell.
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Abstract Gastropods (snails and slugs) constitute by far the largest and most diverse class of Mollusca, with an estimated 40 000 marine, 3000 freshwater and 24 000 terrestrial species (Solem 1974). They are characterized by a distinct head with eyes and tentacles, and a usually coiled shell.
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2017
Prädation durch molluskivore, bohrende Organismen hat großen Einfluss auf die Zusammensetzung einer Gemeinschaft und die Biodiversität von Regionen. In dieser Studie wurden Bohrspuren auf Gastropoden untersucht, um zeitliche und räumliche Muster von Prädation in der Nördlichen Adria zu verstehen.
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Prädation durch molluskivore, bohrende Organismen hat großen Einfluss auf die Zusammensetzung einer Gemeinschaft und die Biodiversität von Regionen. In dieser Studie wurden Bohrspuren auf Gastropoden untersucht, um zeitliche und räumliche Muster von Prädation in der Nördlichen Adria zu verstehen.
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The proteolytic activity of the gastropod egg
Experimental Cell Research, 1957Abstract Two proteolytic enzymes, cathepsin III and leucine aminopeptidase, have been identified in the gastropod egg. The activity of cathepsin III was followed throughout the period of embryonic development.
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