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effects of stanniectomy and hypophysectomy on total plasma cortisol levels in the eel (anguilla anguilla l.). 19724340079
the effects of calcium on branchial sodium fluxes in the sea-water adapted eel, anguilla anguilla, l.1. the sodium influx through the gills of eels placed in calcium-free sea water for 15 hr was double that of controls. the effect was reversed in 1 hr by addition of calcium.2. the total sodium outflux through the gills of fish placed in calcium-free sea water for 15 hr was double that of controls. the effect was only partially reversed in 15 hr by addition of calcium.3. the passive outflux component of the total outflux was increased fourfold when calcium was removed and was restored to normal ...19725033473
[autoradiographic localization of cl- and na+ ions in the chloride cells of sea water adapted eel (anguilla anguilla l.) gills (author's transl)]. 19734795839
[preliminary research on hemoglobin of anguilla anguilla (l.) caught in abruzzo]. 19734790672
two types of lateral line afferents in the eel (anguilla anguilla). 19734724993
[experimental data on the contamination of anguilla anguilla (l.) by chromium 51 and its excretion]. 19734196613
kinetics of water and chloride exchanges during adaptation of the european eel to sea water. 19734705619
metabolic effects of epinephrine and norepinephrine in the eel anguilla anguilla l. 19734689582
metabolic effects of starvation in the eel, anguilla anguilla l. 19734145756
[retinal pigmentary dynamics in the eel (anguilla anguilla)]. 19734794671
[phosphorus absorption by the intestine of the eel (anguilla anguilla l). 1. demonstration and characteristics of in vitro phosphate ion transport in the fresh water eel]. 19734794582
[experimental arguments in favor of an intragranular localization of the hypothalamo-neurohypophysial hormones of anguilla anguilla l]. 19734726040
on the question of american eels, anguilla rostrata versus european eels, anguilla anguilla. 19734724735
the nature and properties of the inducible sodium-plus-potassium ion-dependent adenosine triphosphatase in the gills of eels (anguilla anguilla) adapted to fresh water and sea water.1. gill tissue from eels adapted to fresh water or to sea water was disrupted in 0.32m-sucrose containing 0.1% (w/v) sodium deoxycholate and the subcellular distribution of (na(+)+k(+))-dependent adenosine triphosphatase was determined. 2. about 70% of the recovered enzyme was in a fraction sedimenting between 225000g(av.)-min and 6000000g(av.)-min; the specific activities of enzymes from tissues of freshwater and seawater eels were 16 and 51 mumol of phosphate/h per mg of protein respectively. ...19744282472
proceedings: in-vitro electrolyte metabolism of kidney slices of freshwater- and seawater-adapted eels, anguilla anguilla l. 19744443699
the effect of change of background colour on the ultrastructure of the pars intermedia of the pituitary of the eel (anguilla anguilla). 19744138974
coupling of transmural flows of nacl and water in the intestine of the eel (anguilla anguilla). 19744832995
urea, inulin and para-amino-hippuric acid (pah) excretion by the gills of the eel, anguilla anguilla l. 19744156279
metabolic and hematological studies on the yellow and silver phases of the european eel, anguilla anguilla l. ii. fatty acid composition. 19744452231
[absorption of phosphate ion by eel intestine (anguilla anguilla l.). comparison of two methods of studying in vitro transport at the muscosal level]. 19744141409
[the influence of adaptation to seawater on the function of the interrenal gland of auguilla (anguilla anguilla l.)]. 19744411166
plasma cortisol concentrations in two teleost fishes, anguilla anguilla l. and carassius auratus l.: a comparison of two assay systems. 19744608521
effects of insulin and of metabolite loading on blood metabolites in the european silver eel, (anguilla anguilla l.). 19744413146
[histological, histochemical and histophysiological changes of the exocrine pancreas and stomach fundus in anguilla anguilla l. in the course of postlarval development].during the postlarval development of eels exocrine status of pancreas and fundus was investigated. therefore results of histomorphological, histophysiological and histochemical tests were interpreted. the conclusion is that there is no secretory activity till stage i. no relation exists between secretory activity and food-supply.19751158098
catecholamine fluorescence in the pituitary of the eel, anguilla anguilla, with special reference to its variation during background adaptation.in the neuro-intermediate lobe (nil) of the eel, anguilla anguilla, a specific formaldehyde-induced fluorescence, indicating a catecholamine (ca) innervation, has been demonstrated in the neural lobe processes. microspectrofluorimetric analyses and pharmacological treatments indicate noradrenaline or dopamine or both to be responsible for the fluorescence. the fluorescence in the nil has displayed a definite tendency toward variation during the adaptation to a white and to a black background. th ...19751122533
effect of environmental changes on the lipid composition and (na+ + k+)-dependent adenosine triphosphatase in the gills of the eel, anguilla anguilla. 1975127730
[water balance in the european eel (anguilla anguilla l.). role of the oesophagus in the utilisation of drinking water and a study of the osmotic permeability of the gills (author's transl)].10 new experimental devices are described which allow chonic measurements of drinking rate and osmotic gill permeability in the eel. 20 the oesophagus of the seawater (sw) silver eel plays a role in osmoregulation. it decreases the concentration of cl- and na+ of the ingested sw without losing water in the serosal to mucosal direction. this allows for immediate water absorption in the intestine and decreases the quantity of ions actively absorbed by the intestine. in the freshwater (fw) silver e ...19751223264
responses of the ultimobranchial body in eels (anguilla anguilla l.) maintained in sea water and experimentally matured, to injections of synthetic salmon calcitonin.the effect of a synthetic salmon calcitonin (sct) treatment on ultimobranchial body (ub) activity in eels (anguilla anguilla l.) maintained in seawater and submitted to experimental maturation, has been studied histologically. 2. the activity of the glands of a control group of eels maintained in sea water was taken as a reference. 3. the ub parenchyma showed a marked atrophy in the fish treated with sct alone and serum calcium decreased significantly in this group. 4. immature female silver eel ...19751201598
metabolic and hematological effects of starvation in the european eel, anguilla anguilla l. ii. hematology. 1975241538
metabolic and hematological effects of starvation in the european eel, anguilla anguilla l. i. carbohydrate, lipid, protein and inorganic ion metabolism. 1975241537
[electroencephalographic study of the eel (author's transl)].1 this paper describes a method for electroencephalographic recording from unanesthetized and unraistrained european eels (anguilla anguilla l.). 2 eeg's records from the cerebellum, tectum opticum, telencephalon and olfactory bulb of the eel are compared with other fish previously studied by other authors. 3 averaged evoked visual potentials from the telencephalon, tectum opticum and cerebellum are presented. 4 this study provides a reference point for future research on fish vigilance depth an ...19751206586
[structural modifications of the esophagus linked to osmoregulation in eels].in comparison with the fresh-water eel (anguilla anguilla l.), the oesophagus of the sea-water eel displays an almost complete regression of the multilayered epithelium and consequently the disappearance of mucous cells. in contrast, a large development of a columnaƕ epithelium is associated with a tremendous proliferation of the subepithelial vascularization. these modifications enable one to interpret the changes in ionic permeability of the oesophagus during transfer from freshwater to seawat ...1975807408
activities and localization of succinic dehydrogenase and na-+/k-+-activated adenosine triphosphatase in the gills of fresh water and sea water eels (anguilla anguilla). 1975124643
[the esophagus, osmoregulatory organ of the euryhaline teleost, the eel (anguilla anguilla l)]. 1975808277
effect of salmon calcitonin on calcium and sodium efflux in the european eel (anguilla anguilla l.) 19751142281
[isoenzymes of carbonic anhydrase of an euryhaline fish. variations related to the osmoregulation].a chemical study of carbonic anhydrase (ec 4.2.1.1) from the red blood cells and the gills of an euryhaline fish (anguilla anguilla) is presented. animals adapted to fresh water were compared to those adapted to sea water. the physiochemical constants of the various molecular formsisolated by chromatography and isoelectric focusing were determined; isoelectric ph, molecular weight, and the km and v/e of the enzyme dehydration activity were compared. in both red cells and gills of fish adapted in ...1975234255
[demonstration of leucine aminopeptidase in the peritoneal epithelium of early post-larval stages of anguilla anguilla l.)].the coelom of elvers (anguilla anguilla l.), eel0, is contenting glycoproteids, but these are not improvable in following stages of development. in peritoneal epithelium of eel0 activity of leucinamino-peptidase is present, but absent in the stage 2a. we can suppose that glycoproteids vanish by enzymatic catabolism and resorption within the peritoneal epithelium.19751213251
[comparative metabolism of phospholipids of osmoregulation effector organs in european eel (anguilla anguilla)].the phospholipid composition from various organs of the fresh water eel, such as gill, kidney, gut, liver and muscle, were determined by thin-layer chromatography. the major phosphatides found in these tissues were pc, pe and sph and minor constituents ps, pi, dpg, ap and also lpc in the gut. a greater percentage of ps and sph occurs in the osmoregulatory effector organs such as gill, kidney, and gut. from in vivo comparative kinetic studies of the 32p incorporation into the phospholipids, betwe ...19751182217
sensitivity of eels (anguilla anguilla) and carp (cyprinus carpio) to type c and e botulinum toxin.this study has shown for the first time that fish such as eels (anguilla anguilla l.) and carp (cyprinus carpio l.) are sensitive to type e botulinum toxin. with oral administration the mld for eels was 27.500 mouse ld50 per kg body weight, while for carp it was only 236 mouse ld50 per kg. carp were also found to be sensitive to a slight degree to type c botulinum toxin, the mld of the most virulent toxin of this type being 457,000 mouse ld50 per kg with oral administration. eels, however, showe ...19751179868
endocrine and environmental influences upon plasma cortisol concentrations and plasma renin activity of the eel, anguilla anguilla l.the plasma concentrations of cortisol, sodium, potassium and calcium and plasma osmolarity were determined in freshwater silver eels, after intravascular injections of eel renin preparations, mammalian acth, mammalian angiotensin ii and eel muscle extracts. arterial blood specimens were taken before and after injection of test substances. partially purified eel and rat renal renins gave prolonged pressor responses in intact and hypophysectomized eels and in the nephrectomized rat anaesthetized w ...1976180226
[feeding and growth of elvers of anguilla anguilla l. (eel-like teleosten fish) experimentally reared at various temperatures in the laboratory].in france, there are few researches carried out on the eel's elvers rearing. so, we have undertaken to do, in a first time, a study of their alimentation and growth, in relation to the temperature, at laboratory. the structure of european eels' elvers population, drawn in its natural environment, shows a polymodal frequency distribution of individual weights. the temperature has a direct effect on general metabolism of animals and consequently on their growth. for temperatures included between 1 ...197613699
effects of adrenergic blocking drugs on the cardiovascular system of the eel, anguilla anguilla (l.). 19768270
effects of catecholamines on the heart and on branchial and peripheral resistances of the eel, anguilla anguilla (l.). 19768269
the perception of weak electric d.c. currents by the european eel (anguilla anguilla). 19763328
effect of environmental salinity change on osmotic permeability of the isolated gill of the eel, anguilla anguilla l.net water fluxes in the isolated gills of anguilla anguilla were studied during incubation in fresh water (fw) and in sea water (sw). when incubated in fw, water entry was greater in sw-adapted eels than in fw-adapted eels. in contrast, water loss in sw was less in sw-adapted eels than in fw-adapted eels. rectification of osmotic water fluxes was observed for both fw and sw-adapted eels, net water fluxes in the mucosal-serosal (m-s) direction being greater than those in the opposite (s-m) direct ...19761263144
metabolic and hematological effects of starvation in the european eel, anguilla anguilla l.--iii. fatty acid composition. 19761261240
further studies of eel virus (berlin) isolated from the blood of eels (anguilla anguilla) with skin papilloma. 1976981684
further investigations on the chromosomes of anguilla anguilla. 1976955167
[blood morphology of the european eel (anguilla anguilla). ii. studies on granulopoiesis].it was found that the granulocytes for anguilla anguilla mainly form in the kidney. the stem cell of granulocytes is the large hemocytoblast. sequences of development were established for the heterophil, cosinophil and basophil granulocytes. myeloblasts, promyelocytes, metamyelocytes, mature red-shaped and segmented forms were described as stages of development of the heterophil granulocytes. in the case of the eosinophil and basophil granulocytes the myeloblastic and myelocytic stages could be ...197664409
[studies on blood morphology in the european eel (anguilla anguilla). i. erythrocytes and their developmental stages].by means of heart tapping we produced a larger loss of blood in the european eel, anguilla anguilla. this resulted in enriching the peripheric blood with erythroblasts and proerythrocytes. by panoptic staining erythroblasts, proerythrocytes and mature erythrocytes could be prepared and described. by the aid of supravital staining it was possible to detect mitochondria and substantia granulofilamentosa in all stages of development. phase contrast observations proved that the erythrocytes of angui ...197661916
[a method to measure the rate of metabolic clearance and secretion of cortisol in the eel (anguilla anguilla l.)].classical methods for the analysis of steroid dynamics were adapted to measure the metabolic clearance rate and the secretion rate of cortisol in the european eel using (1, 2-3h) cortisol as a tracer. 1. measurements were made whilst the eels were in the steady state; stresses which usually result from anaesthesia and handling were avoided by chronic catheterization of the blood vessels of the swim bladder. in this way, the plasma cortisol level were constant; thus, it was possible to obtain val ...1976953857
effects of calcitonin and ultimobranchialectomy (ubx) on calcium and bone metabolism in the eel, anguilla anguilla l.prolonged administration of synthetic salmon calcitonin (sct) to immature female silver eels, maintained in sea water, provoked a decrease of the serum calcium concentration and an increase of both the osteoblastic apposition and of the degree of mineralization of the intercellular matrix in the vertebral bone. the osteoclastic resorption and osteocytic osteolysis were not significantly affected, however the osteoclastic index was reduced. the ultimobranchial body, site of ct secretion, was caut ...19761260486
trying to explain an effect of "per se" hydrostatic pressure on heart rate in fish.specific effects of "per se" hydrostatic pressure on mean heart rate have been studied on eels (anguilla anguilla l.), both untreated and treated with atropine and propranolol, and on isolated eel's heart. because temperature brings, by itself, heart rate modifications in fish, a quantitative study was performed in order to take away the increment of heart rate due to the water warming, which cannot entirely be suppressed during compression. the specific effects of "per se" pressure have been id ...19761259668
eel esophagus as an osmoregulatory organ.ion and water permeabilities were measured in the isolated esophagus of the eel (anguilla anguilla and a. japonica), and compared with those in the stomach and the intestine. the freshwater eel esophagus was impermeable both to na+ and cl- ions and to water, whereas permeabilities to the ions increased selectively after seawater adaptation. the ion permeabilities of both the freshwater and the seawater eel stomach were lower than in the seawater eel esophagus, although water permeability was gre ...19761063415
[influence of the acclimation temperature on the phospholipid metabolism of the fresh water ell (anguilla anguilla) (author's transl)].lowering of the acclimation temperature of the eel induced a reduction of 32p incorporation into the lipid phosphorus of various tissues. this effect was partly the result of a slight decrease of the inorganic phosphate exchange and metabolism of tissues. 2. the variation of the 32p incorporation into the various phosphatides was different according to the tissue ; gill and kidney phospholipids being the most effected. at high temperature (22 degrees c), the turnover of sphingomyelin and phospha ...1976933075
physiological properties of eel haemoglobin: hypoxic acclimation, phosphate effects and multiplicity.unlike the whole body oxygen affinity, which adapts readily to environmental oxygen tensions, haemoglobins, prepared from normoxic- and hypoxic-accimated eels (anguilla anguilla) show no adaptive changes in oxygenation properties or in multiplicity. hypoxic acclimation is, howeveer, accompanied by a strong decrease in red cell nucleoside triphosphates, particularly guanosine triphospphate (gtp), which depresses oxygen affinity of the composite and component haemoglobins more strongly than does t ...19765572
the effects of transecting the ixth and xth cranial nerves on hydromineral balance in the eel anguilla anguilla.the ixth and the xth cranial nerves in anguilla anguilla were transected, and the effects upon ion and water balance were studied in fresh water and sea water, and during transfer from fresh water and vice versa. in fresh water there is a slow demineralization due to an excess loss of na and cl ions. during freshwater to seawater transfer the eel survives only for 4-5 days. the fish do not drink and na efflux does not increase enough to extrude excess ions. in sea water the glossopharyngeal and ...1976932628
steroid biosynthesis by the ovary of the european eel, anguilla anguilla l., at the silver stage. 1976133849
endocrine effects on the cation-dependent atpases of the gills of european eels (anguilla anguilla l.) and efflux of na. 1976136378
[electroencephalographic activity of a fish (anguilla anguilla l.) exposed to various hyperbaric conditions (author's transl)].1. as a continuation of previous work where our methods were fully described (barthelemy et al., j. physiol., paris, 1975, 70, 173-183), the present paper consists of research on eeg activity modifications in the eel (anguilla anguilla l.) submitted to different hyperbaric conditions (fig. 1). 2. in contrast with mammals, the fish makes it possible to isolate the specific effects of per se pressure: those were researched to a maximum pressure of 101 ata. slow and sharp-pointed theta waves appear ...19761011173
metabolic effects of insulin in the european eel, anguilla anguilla l. 1976955394
effects of ultimobranchialectomy (ubx) upon the bone catabolism and anabolism and on some aspects of the calcium metabolism regulation in anguilla anguilla l. 1976953845
the saccus vasculosus of anguilla anguilla (l.) from larva to adult. i. ultrastructural modifications of the coronet cells.the ultrastructure of coronet cells of the saccus vasculosus has been studied in specimens of anguilla anguilla (l.) at different stages of its life cycle. at all the stages observed coronet cells are composed of a basal and an apical part, the latter bearing globules with primary vesicles. in the larva (a marine form) and in the fully metamorphosed small eel at the time of entry into freshwater the narrow lumen and the vesicles within the apical globules are filled with electron-dense material. ...19761253249
plasma insulin and glucose responses to glucagon and catecholamines in the european silver eel (anguilla anguilla l). 1977598687
comparative study of toxicity, uptake and distribution of cadmium and mercury in the sea water adapted eel anguilla anguilla. 1977922183
relative estimation of ventilatory fow rate in the eel (anguilla anguilla l.)freshwater eels (anguilla anguilla l.) were experimented on in order to measure ventilatory flow rate (by means of a direct method of collecting expired water), and simultaneously, to record sub-opercular pressure changes and opercular displacements (operculogram). significant correlations (p less than 0.01) were found between the ventilatory flow rate (v) and various characteristics of operculiogram records. the relationships which are significant in each fish experimented on are; v = a(f.lo) + ...1977928851
[morphological, cytological, and biochemical changes of anguilla anguilla l. gills deprived of stannius corpuscles (s. c.) (author's transl)].in the silver female eel (anguilla anguilla l.) maintained in fresh water, surgical removal of stannius corpuscles (sc) resulted in: a) a significant increase of wet weight of gill cells and the dry weight of gill filaments expressed as function of body weight. b) a proliferation and a hypertrophy of chloride cells shown by a significant rise of cell volume expressed as a precentage of the epithelial volume. c) an increase of the calcium (ca) binding protein activity in the total branchial mucos ...1977886479
responses of bone metabolism in the eel (anguilla anguilla) to injections of 1,25-dihydroxyvitamin d3. 1977912521
cutaneous respiration in three freshwater teleosts.cutaneous oxygen consumption and oxygen uptake from the external medium were investigated in three species of freshwater teleosts:eel(anguilla anguilla l.)(silvered stage), trout (salmo gairdnerii r.) and tench (tinca tinca l.). the oxygen consumption of the skin is the same in the three species: 4.5 nmol-cm-2-min-1. it accounts for 35% of total mo2 in the eel; 23% in the tench, which lives in poorly oxygenated water; and 13% in the trout living in highly oxygenated water. cutaneous oxygen consu ...1977882732
glucose and amino acid-stimulated insulin release in vivo in the european silver eel (anguilla anguilla l.). 1977844682
adrenalin induced turnover of phosphatidic acid and phosphatidyl inositol in chloride cells from the gills of anguilla anguilla. 1977838064
formaldehyde-induced fluorescence in the telencephalon and diencephalon of the eel (anguilla anguilla l.). a fluorescence-microscopic and microspectrofluorometric investigation with special reference to the innervation of the pituitary.in the telencephalon and diencephalon of the eel (anguilla anguilla l.) formaldehyde-induced fluorescence was studied microscopically and microfluorometrically with special emphasis on the innervation of the pituitary. in the telencephalon fluorescent fibers contained predominantly noradrenaline fluorophores. fluorescent nuclei could not be established. in the diencephalon fluorescent perikarya were found in: (1) the paraventricular organ (pvo), possessing either dopamine or, to a lesser extent, ...197713933
[electrical activity of the brain of the eel (anguilla anguilla l.) subjected to hypoxia and hypercapnia].the effects of hypoxia and hypercapnia on the electric activity of cerebral vesicles have been studied in 48 unrestrained eels placed in water in a soundproof location. 1. hypoxia (pwo2 less than 5 torr) was well endured for 8 hours after which sharp bursts appeared, rapidly followed by cerebral death. 2. hypercapnia (pwco2 congruent to 14 torr) gave an amplitude decrease in cerebral activity beginning with the first hour, and after 8 hours there was an appearance of slow waves which progressive ...1977615248
immunofluorescent identification of the cells of origin of eel (anguilla anguilla) pituitary hormones separated by polyacrylamide gel electrophoresis. 1977319041
the adrenergic innervation of the pituitary of the eel, anguilla anguilla, with special reference to the control of the pars intermedia. 1977273367
[mannose transfer in liver microsomes of the eel (anguilla anguilla)].a purified eel liver microsomal fraction catalyses the transfer of mannose, from gdp-mannose, to endogenous lipid and proteins. the mannolipid is identified as a polyprenol-phosphate-mannose and its role is discussed.1977146564
[calcitonin in the ultimobrancial body of anguilla (anguilla anguilla l.): cytologic localization by indirect immunofluorescence using human anti-salmon-calcitonin antibodies].the localization of intracellular calcitonin has been achieved by immunofluorescence in the cytoplasm of all cells forming the epithelium of the ultimobranchial body of eels, using a human antiserum against synthetic salmon calcitonin i. the specificity of the reaction is demonstrated by inhibition with synthetic salmon calcitonin (s.c.t.); the fluorescence is not inhibited by synthetic human calcitonin (h.c.t.).1977409547
[studies on the morphology of blood of the european eel (anguilla agnuilla). iii. studies on monocytic and lymphoid cells].investigations concerning the monocytic and lymphocytic cell series were carried out on the peripheral blood and dabbings of the kidney, the spleen and intestines of healthy eels (anguilla anguilla), and eels taken ill with vibrio anguillarum. by means of histological, cytochemical, phaseoptical, and electronmicroscopical examinations independent development lines of the monocytes and lymphocytes were established. the place of origination for the monocytes was found to be the kidney, for the lym ...197772711
studies on lectins. xxxvi. properties of some lectins prepared by affinity chromatography on o-glycosyl polyacrylamide gels.a number of lectins has been purified by affinity chromatography on o-glycosyl polyacrylamide gels. the lectins isolated (and the particular sugar ligands used in the affinity carriers) are as follows: anguilla anguilla, serum (alpha-l-fucosyl-), vicia cracca, seeds; phaseolus lunatus, seeds; glycine soja, seeds; dolichos biflorus, seeds; maclura pomifera, seeds; sarothamnus scoparius, seeds; helix pomatia, ablumin glands; clitocybe nebularis, fruiting bodies (all n-acetyl-alpha-d-galactosaminyl ...1978563738
cutaneous respiration in seven sea-water teleosts.the oxygen consumption of excised skin (mo2 is.cut.) and the normal cutaneous oxygen uptake by the skin in situ from the external medium (mo2 ext.cut.) were investigated in seven species of teleosts in normoxic sea water: butterfish (pholis gunnellus l.), cod (gadus morhua l.), five-bearded rockling (ciliata mustela l), shanny (blennius pholis l.), flounder (platichthys flesus l.), sole (solea solea l.) and eel (anguilla anguilla l.). in the butterfish, cod and rockling, all the oxygen absorbed ...1978741099
effects of desoxycorticosterone acetate on renal structure in the mouse and in the european eel.the administration of desoxycorticosterone acetate (doca) induces morphological changes in the kidney of mice and eels. such changes mainly concern the cells of the distal tubules and collecting tubules. these changes are consistent with the hypothesis that the hormone would exert a different action in mammals and in teleosts.1978747222
growth of striated muscle fibres in the m. lateralis of the european eel anguilla anguilla (l.) (pisces, teleostei).diameters of red and white muscle fibres were measured in the m. lateralis of eels cultured under laboratory circumstances over a period of 2 years, starting from the glass eel stage. the red fibres of eels less than 10 cm are unique in that their growth involves increase in diameter only. growth of the red fibres in eels greater than 10 cm, and of the white fibres in eels at all lengths considered, is characterized by an increase in number as well as diameter, the relative importance of these t ...1978640952
neurohypophysial hormonal control of kidney function in the furopean eel (anguilla anguilla l.) adapted to sea-water or fresh water.low doses of arginine-vasotocin (avt), isotocin and oxytocin (1 pg-1 ng/kg body weight) were antidiuretic in eels adapted to fresh water but not in those adapted to sea-water. high doses (more than 10 ng/kg) were always diuretic. no effects on tubular water reabsorption were observed and the glomerular filtration rate (gfr) was proportional to the maximum reabsorptive rate for glucose (tm(glucose)) in eels adapted to sea-water. increases in urinary flow appeared therefore to result from glomerul ...1978627824
a golgi study of the hypothalamus of actinopterygii.the preoptic area of a primitive actinopterygian, the polypteriform, calamoichthys calabaricus smithi, and of the teleost, anguilla anguilla l., have been studied by golgi and other neurohistological and histochemical methods. in the preoptic area two regions can be recognized: a cell rich median region and a lateral one, composed mostly of fiber systems. after golgi staining a varied population of neurons is seen, including: (1) magnocellular neurons, endowed with a number of dendrites and an a ...197875069
c-banding pattern in chromosomes of the european eel (anguilla anguilla). 1978738466
[blood morphology of the european eel (anguilla anguilla). iv. thrombocytes and their developmental stages].by the aid of histological special stainings, cytochemical proofs, phase contrast and electron microscopical methods the thrombocytes (spindle cells) of the european ell (anguilla anguilla) and their stages of development were described as an independent series of cells. after an artificial blood loss thrombocytoblasts, prothrombocytes and mature thrombocytes could distinctly be demonstrates. besides the kidney the spleen was found to be the main place of the thrombopoiesis. phase contrast inves ...197879529
phosphate-binding peptide in the gill and kidney of the eel (anguilla anguilla) [proceedings]. 1978731162
low molecular weight calcium-binding protein from the kidney and gill of the freshwater eel (anguilla anguilla) [proceedings]. 1978731161
control of prolactin and growth hormone secretion in the eel anguilla anguilla. 1978570533
high affinity calcium binding peptides from the gills, gut and kidneys of the freshwater eel (anguilla anguilla).we report the isolation of high affinity calcium-binding peptides from homogenates of gills, gut and kidneys of the freshwater eel anguilla anguilla. these peptides show identical gel-filtration profiles on biogel p-6, from which a molecular weight of 3500 was estimated. the average binding constant (kf) for calcium is 7 . 10(7)m-1, and mgcl2 up to 5 mm does not displace calcium.1978708780
temperature-dependent growth and regression of epidermal tumors in the european eel (anguilla anguilla l.).the population of eels in the elbe estuary showed a high rate of affliction with epidermal papillomas. distinct seasonal fluctuations were observed in the frequency of occurrence and tumor size. in spring and autumn, the frequency was low, and the tumors were relatively small. in summer, the tumors reached a maximum in both frequency and size. a distinct influence of water temperature on tumor growth was demonstrated experimentally. summer temperatures of 15--22 degrees c caused very rapid growt ...1978280183
circadian rhythm in brain catecholamine concentrations in the teleost: anguilla anguilla l. 197938036
continuous evaluation of pa,o2 in fish: recording and data processing.1. in the eel (anguilla anguilla l.), the dorsal and ventral aortas and the subhepatic vein were catheterized to provide an external circulatory shunt. po2 in the shunted blood was continuously recorded using a polarographic measuring device. 2. spontaneous interruptions in the eel's ventilatory activity result in rapid changes in pa,o2. the period of these pa,o2 oscillations is sometimes less than 1 min. however, the response time of the measuring system is so great under the conditions of thes ...197911799688
the partial purification of sodium-plus-potassium ion-dependent adenosine triphosphatase from the gills of anguilla anguilla and its inhibition by orthovanadate.1. (na+ +k+)-dependent atpase was partially purified from eel gills by a procedure in which the microsomal fraction of crude preparations of chloride cells was selectively extracted with sodium dodecyl sulphate. 2. the microsomal specific activity was increased 2-fold during optimal treatment with detergent. 3. the final preparation (56% pure) had a specific activity of 341 mumol of atp hydrolysed/h per mg of protein and a turnover number of 3560 min-1. the number of ouabain-binding sties equall ...197939542
capillary limitation of oxygen distribution in the isolated rete mirabile of the eel (anguilla anguilla). 1979428046
insulin secretion from the in situ perfused pancreas of the european silver eel, anguilla anguilla l. 197937145
the electrosensitivity of the lateral line of the european eel, anguilla anguilla l.the lateral line neuromast of the eel (anguilla anguilla) are slightly sensitive to electric current (threshold current density about 1 x 10(-6) a/cm2). a comparison is made with threshold values found by several authors by means of conditioning experiments.1979512967
the influence of environmental salinity, temperature, ionizing irradiation and yellow or silver stage on lipid metabolism in the gills of the european eel (anguilla anguilla).1. the influence of temperature on the incorporation of [32p]phosphate and [14c]acetate into gill lipids in vivo depends also on environmental salinity. 2. ionizing irradiation (1000 r) results in a relatively enhanced incorporation of [32p]phosphate into phosphatidyl choline and of [14c]acetate into triglycerides and wax esters in vivo. 3. when gill tissue is removed from the animal and incubated in vitro, a pronounced dependence of lipid metabolism on previous environmental salinity is not obs ...1979318426
[stimulation of intestinal absorption of ca in the eel anguilla anguilla l. by vd3 and 1,25-(oh)2d3 (author's transl)]. 1979228027
characterization of ev-2, a virus isolated from european eels (anguilla anguilla) with stomatopapilloma.a virus designated ev-2 has been isolated from external tumor tissue and internal organs of european eels (anguilla anguilla) with stomatopapilloma. it contains rna and is ether, acid, and temperature labile above 4 degrees c, and concentrated preparations agglutinate chicken and sheep erythrocytes. the addition of actinomycin d during the first 2.75 h of infection inhibits viral replication. as determined in sucrose gradients, the buoyant density of the virus is 1.19 g/cm(3). ev-2 has a moderat ...197916789177
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