Sodium-potassium activated adenosine triphosphatase in coelacanth tissues: High activity in rectal gland

Griffith, Robert W.; Burdick, Carolyn J.

doi:10.1016/0305-0491(76)90140-1

Cited by 8 publications

(2 citation statements)

References 13 publications

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“…Nothing is known about the mechanisms of osmotic and ionic regulation by the coelacanth since no studies have been performed on Jiving individuals. It is interesting to note that a post-anal gland is present (Millot and Anthony, 1972) and recent studies indicate that, like the shark rectal gland, it possesses high concentrations of Na + -K +-activated ATPase (Griffith and Burdick, 1976).…”

Section: Crossopterygii and Dipnoimentioning

confidence: 99%

Osmotic and Ionic Regulation by Freshwater and Marine Fishes

Evans

1980

Environmental Physiology of Fishes

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Section: Crossopterygii and Dipnoimentioning

confidence: 99%

Osmotic and Ionic Regulation by Freshwater and Marine Fishes

Evans

1980

Environmental Physiology of Fishes

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“…Ses elements essentiels sont des acino-tubuli de type sereux, densement serr6s les uns contre les autres, tres variables de forme et de diametre interieur. Lemire (1977), dans une etude ultrastructurale de la avec le haut niveau de l'ATPase (Na-K) trouv6 par Griffith & Burdick (1976) dans des homogenats de glande postanale. Ainsi cette glande de Latimeria s'apparenterait a la glande rectale digitiforme des selaciens, a laquelle on a reconnu un role principal de regulation osmotique interne par excretion de solutions salines.…”

Section: Travauxunclassified

Évocation des travaux français sur Latimeria notamment depuis 1972

1980

Proc. R. Soc. Lond. B.

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French research on Latimeria published before 1972 is first briefly recalled. After the Anglo-Franco-American Expedition of 1972, the material obtained enabled us to focus attention on the histology of the kidney and ureter and on ultrastructural aspects of the postanal gland. Ovarian eggs of unusual volume have been collected, measured and weighed. Kinematic analysis of the intracranial articulation was carried out in 1973 on a frozen coelacanth that reached Paris. Studies in 1974 of a 41 cm specimen, the smallest known at that time and estimated to be 3½ years old, showed that the brain still filled the cranial cavity: thus, it is later that allometric growth of the cranial cavity relegates the brain to the posterior part of the skull. In the same specimen, radiographed after injection with colloidal barium oxide, we were able to specify the likely role of the contractile organs fused to the branchial arteries: they may serve to regulate arterial pressure in the head during sudden movements of the jaws, and thus of the anterior cranium, as prey is captured. Lastly, the structural characteristics of the teeth, scale denticles, and spines on the lepidotrichia have been revealed, as also has the lamellar structure of the scales, in which there is a crossed orientation of the fibres in the different layers. Brève évocation des travaux français effectués sur Latimeria avant 1972. Après l’expédition anglo-franco-américaine de 1972 le matériel obtenu a permis une mise au point de l'histologie du rein, de l’uretère et des aspects ultra-structuraux de la glande postanale. Des ovules nus d’un volume inusité, ont été recueillis, mesurés et pesés. Une analyse des mouvements de l’articulation intracrânienne a été réalisée en 1973 sur un coelacanthe arrivé congelé à Paris. En 1974, un spécimen de 41 cm, le plus petit à cette époque, a fait voir qu’à ce stade, dont l’âge a été évalué à trois ans et demi, l’encéphale emplissait encore la cavité crânienne; c’est done plus tard que la cavité crânienne subit une croissance allo-métrique reléguant le cerveau dans l’arrière crâne. Par ce même spécimen, soumis à la cinéradiographie avec injection à la baryte colloïdale, le rôle vraisemblable des organes contractiles greffés sur les artères branchiales a pu être précisé: ils doivent servir à une régulation de la pression artérielle céphalique lors des mouvements brusques des mâchoires, et par conséquent de l’avant-crâne, dans la capture des proies. Enfin l’identité structurale des dents, des denticules des écailles et des épines superficielles des lépidotriches a été mise en évidence, ainsi que la structure lamellaire des écailles avec une orientation régulièrement décalée des fibres de ses différentes couches.

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Osmoregulation and Excretion

Larsen

Deaton

Onken

et al. 2014

Comprehensive Physiology

185

141

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The article discusses advances in osmoregulation and excretion with emphasis on how multicellular animals in different osmotic environments regulate their milieu intérieur. Mechanisms of energy transformations in animal osmoregulation are dealt with in biophysical terms with respect to water and ion exchange across biological membranes and coupling of ion and water fluxes across epithelia. The discussion of functions is based on a comparative approach analyzing mechanisms that have evolved in different taxonomic groups at biochemical, cellular and tissue levels and their integration in maintaining whole body water and ion homeostasis. The focus is on recent studies of adaptations and newly discovered mechanisms of acclimatization during transitions of animals between different osmotic environments. Special attention is paid to hypotheses about the diversity of cellular organization of osmoregulatory and excretory organs such as glomerular kidneys, antennal glands, Malpighian tubules and insect gut, gills, integument and intestine, with accounts on experimental approaches and methods applied in the studies. It is demonstrated how knowledge in these areas of comparative physiology has expanded considerably during the last two decades, bridging seminal classical works with studies based on new approaches at all levels of anatomical and functional organization. A number of as yet partially unanswered questions are emphasized, some of which are about how water and solute exchange mechanisms at lower levels are integrated for regulating whole body extracellular water volume and ion homeostasis of animals in their natural habitats. © 2014 American Physiological Society.

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Sodium-potassium activated adenosine triphosphatase in coelacanth tissues: High activity in rectal gland

Cited by 8 publications

References 13 publications

Osmotic and Ionic Regulation by Freshwater and Marine Fishes

Osmotic and Ionic Regulation by Freshwater and Marine Fishes

Évocation des travaux français sur Latimeria notamment depuis 1972

Osmoregulation and Excretion

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