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the perception of weak electric d.c. currents by the european eel (anguilla anguilla). 19763328
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
effects of catecholamines on the heart and on branchial and peripheral resistances of the eel, anguilla anguilla (l.). 19768269
effects of adrenergic blocking drugs on the cardiovascular system of the eel, anguilla anguilla (l.). 19768270
[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
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
insulin secretion from the in situ perfused pancreas of the european silver eel, anguilla anguilla l. 197937145
circadian rhythm in brain catecholamine concentrations in the teleost: anguilla anguilla l. 197938036
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
[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
[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 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
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
[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
[electron microscopical and ultrahistochemical investigations of erythrocytes from eel (anguilla angiulla) and rainbow-trout (salmo giardneri) under the specific consideration of the segregation apparatus and the marginal band (author's transl)].comparative studies were carried out on the fine structure of the erythrocytes of the european eel (anguilla anguilla) and the rainbow trout (salmo gairdneri) using electron microscopy and ultrahistochemistry. the cell organelles, the marginal band and the segregation apparatus were investigated. the 2 organelles revealed specific differences. an alkaline phosphatase activity was revealed by ultrahistochemistry at the cell surface only, while alternating activities between the nuclear membranes, ...1998104531
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
effect of environmental changes on the lipid composition and (na+ + k+)-dependent adenosine triphosphatase in the gills of the eel, anguilla anguilla. 1975127730
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
[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
cerebrospinal fluid-contacting neurons, ciliated perikarya and "peptidergic" synapses in the magnocellular preoptic nucleus of teleostean fishes.the magnocellular preoptic nucleus of fishes (anguilla anguilla, amiurus nebulosus, cyprinus carpio, carassius auratus, ctenopharyngodon idella, cichlasoma nigrofasciatum) has been studied by light and electron microscopy. two kinds of neurons were found: a) large, electron-dense, gomori-positive cells with moderate acetylcholinesterase (ache) positivity which contain granulated vesicles of 1400 to 2200 a (in average 1600 to 1800 a), adn b) small, strongly ache-positive, electron-lucent neurons ...1987174818
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
[stimulation of intestinal absorption of ca in the eel anguilla anguilla l. by vd3 and 1,25-(oh)2d3 (author's transl)]. 1979228027
[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
metabolic and hematological effects of starvation in the european eel, anguilla anguilla l. i. carbohydrate, lipid, protein and inorganic ion metabolism. 1975241537
metabolic and hematological effects of starvation in the european eel, anguilla anguilla l. ii. hematology. 1975241538
the adrenergic innervation of the pituitary of the eel, anguilla anguilla, with special reference to the control of the pars intermedia. 1977273367
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
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
immunofluorescent identification of the cells of origin of eel (anguilla anguilla) pituitary hormones separated by polyacrylamide gel electrophoresis. 1977319041
[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
capillary limitation of oxygen distribution in the isolated rete mirabile of the eel (anguilla anguilla). 1979428046
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
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
control of prolactin and growth hormone secretion in the eel anguilla anguilla. 1978570533
plasma insulin and glucose responses to glucagon and catecholamines in the european silver eel (anguilla anguilla l). 1977598687
[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
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
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
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
low molecular weight calcium-binding protein from the kidney and gill of the freshwater eel (anguilla anguilla) [proceedings]. 1978731161
phosphate-binding peptide in the gill and kidney of the eel (anguilla anguilla) [proceedings]. 1978731162
c-banding pattern in chromosomes of the european eel (anguilla anguilla). 1978738466
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
[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
[the esophagus, osmoregulatory organ of the euryhaline teleost, the eel (anguilla anguilla l)]. 1975808277
adrenalin induced turnover of phosphatidic acid and phosphatidyl inositol in chloride cells from the gills of anguilla anguilla. 1977838064
glucose and amino acid-stimulated insulin release in vivo in the european silver eel (anguilla anguilla l.). 1977844682
effect of deterlon (dbs) on the electrocardiogram of eel anguilla anguilla (l).effect of deterlon (dbs) on the electrocardiogram of eel anguilla anguilla (l). acta physiol. pol. 1977, 28 (2): 179--186. the investigations of the effect of a detergent deterlon-dbs present in industrial and community sewage on ecg changes in the eel anguilla anguilla (l) showed that it causes disturbances in the impulse-generating centres and in the mechanism of impulse conduction in the heart. it was found that the threshold concentration of deterlon-dbs in aqueous medium is 3 mg sa/1 for th ...2006868536
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
[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
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
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
[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
effects of ultimobranchialectomy (ubx) upon the bone catabolism and anabolism and on some aspects of the calcium metabolism regulation in anguilla anguilla l. 1976953845
[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
further investigations on the chromosomes of anguilla anguilla. 1976955167
metabolic effects of insulin in the european eel, anguilla anguilla l. 1976955394
further studies of eel virus (berlin) isolated from the blood of eels (anguilla anguilla) with skin papilloma. 1976981684
[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
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
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 salmon calcitonin on calcium and sodium efflux in the european eel (anguilla anguilla l.) 19751142281
[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
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
[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
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
[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
[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
[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
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
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
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
metabolic and hematological effects of starvation in the european eel, anguilla anguilla l.--iii. fatty acid composition. 19761261240
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
the use of texture analysis for the discrimination of nissl substance in neurons.structural changes induced by cordotomy in the nissl substance of identifiable spinal motoneurons innervating the white musculature of the european eel were quantified with the use of texture features calculated from digitized images. data were evaluated and the motoneurons classified by using multivariate analysis. the study shows that there are differences in the structural organization of the nissl substance of motoneurons taken from control and cordotomized fishes. distinction could only be ...19921282188
h+/glycyl-glycine cotransport in eel intestinal brush-border membrane vesicles: studies with the ph-sensitive dye acridine orange.monitoring the fluorescence quenching of the ph-sensitive dye acridine orange, proton accumulation in the presence of an inside-negative transmembrane potential was measured in eel (anguilla anguilla) intestinal brush-border membrane vesicles. it was demonstrated that the proton accumulation was specifically increased by the presence of the dipeptide glycyl-glycine in the extravesicular space, showing saturation kinetics at increasing dipeptide concentrations and was specifically inhibited by di ...19921327139
atrial natriuretic peptide in the eel, anguilla anguilla l.: its cardiac distribution, receptors and actions on isolated branchial cells.the presence of atrial natriuretic peptide (anp) and the nature of its binding sites were studied in fresh-water (fw)- and seawater (sw)-adapted eels using a heterologous analogue, that of the rat (ranp). rat anp-like immunoreactivity was demonstrated in the cardiac atria and ventricles of both fw and sw eels, and electron-dense anp-like granules were observed. the atria and ventricles of fw eels contained significantly more granules than those of sw animals and, in both types, the atria were mo ...19921329803
lindane-induced changes in carbohydrate metabolism in anguilla anguilla.1. anguilla anguilla (l.) was exposed to a sublethal concentration of 0.167 ppm (0.25 of the 96-hr lc50) of lindane for 6, 12, 24, 48, 72 and 96 hr. 2. changes in glycogen, glucose, pyruvate and lactate contents of liver and muscle after lindane exposure, were studied. 3. muscle and liver glycogen levels decreased significantly during the exposure time. muscle glucose values increased but on the other hand we found a decrease in those of liver. 4. muscle and liver pyruvate content increased as d ...19921379899
a comparison of highly unsaturated fatty acid levels in wild and farmed eels (anguilla anguilla).1. absolute and relative amounts of eicosapentaneoic acid (epa) and docohexaenoic acid (dha) in muscle of eels from four different fish farms were compared with samples from wild eels from two different areas of northern italy. 2. farmed eels were richer in dha and epa than wild animals. 3. the addition of cod liver oil to the diet of farmed eels led to a significant accumulation of epa and dha, but no change in total lipid content. 4. the calculation of two indices related to highly unsaturated ...19921499279
chlorinated hydrocarbons in eels (anguilla anguilla l.) from the river rhine. 19921522922
white muscle differentiation in the eel (anguilla anguilla l.): changes in the myosin isoforms pattern and atpase profile during post-metamorphic development.myosin isoforms and their light and heavy chains subunits were studied in the white lateral muscle of the eel during the post metamorphic development, in relation with the myosin atpase profile. at elver stage vi a1 the myosin isoforms pattern was characterized by at least two isoforms, fm3 and fm2. the fast isomyosin type 1 (fm1) appeared during subsequent development. it increased progressively in correlation with the increase in the level of the light chain lc3f. fm1 became predominant at sta ...19941534545
acute toxicity, uptake and clearance of diazinon by the european eel, anguilla anguilla (l.).the toxicity, accumulation, and elimination of diazinon were investigated for the european eel, anguilla anguilla. the 24, 48, 72 and 96-h median lethal concentrations (lc50) were 0.16, 0.11, 0.09 and 0.08 mg/l, respectively. fish exposed to sublethal concentration (0.042 mg/l) accumulated diazinon in liver and muscle tissues. bioconcentration factors (bcf) of diazinon were 1850 in liver, and 775 in muscle over the 96-h exposure period. upon removal from diazinon containing water the contaminate ...19921593096
affinity purification of antigen-specific serum immunoglobulin from the european eel (anguilla anguilla).immunization of specimens of the european eel with a hapten-carrier conjugate resulted in a significant rise in anti-hapten titres. antigen-specific immunoglobulin was purified on a matrix onto which the hapten-carrier conjugate had been immobilized. rabbit antisera raised against the product of the affinity purification recognized two molecular moieties. the first was eel immunoglobulin as inferred by the polypeptide composition, i.e. disulphide-linked heavy and light chains of 72 kda and 25 kd ...19921615286
[implication of growth hormone in experimental induction of vitellogenesis by estradiol-17 beta in female silver eel (anguilla anguilla l.)].the effect of different preparations of growth hormone (gh) was assayed with 17 beta-estradiol on vitellogenesis in hypophysectomized or normal female silver eels. vitellogenin (vg) plasma levels were taken as the index of hepatic vitellogenesis. the e2 doses were chosen to give the same pattern for the plasma vg level as in the controls. they decreased or remained undetectable in hypophysectomized or normal animals. gh also failed to induce alone a significant modification. when e2 was injected ...19921638433
lectins from triticum vulgaris and limax flavus are universal antagonists of botulinum neurotoxin and tetanus toxin.lectins from anguilla anguilla, artocarpus integrifolia, canavalia ensiformis, datora stramonium, glycine max, limax flavus, ricinus communis and triticum vulgaris were tested for their abilities to antagonize the binding of botulinum neurotoxin and tetanus toxin to rat brain membranes and to antagonize the ability of these toxins to block neuromuscular transmission in mouse phrenic nerve-hemidiaphragm preparations. lectins from limax flavus and triticum vulgaris, both of which have affinity for ...19911653841
age-related decrease in the density of benzodiazepine recognition sites in the brain of the fresh water eel (anguilla anguilla).the binding parameters of benzodiazepine receptors labeled with [3h]flunitrazepam were investigated in the brain of male adult eels at the trophic phase (4 years old) and of male silver eels (6 year old ocean migrants). the density of [3h]flunitrazepam binding sites was significantly decreased (-26%) in the brain of silver eels compared with younger counterparts. in contrast, the apparent dissociation constant (kd) was not significantly different in the two experimental groups. these results are ...19911667812
significant year-to-year variation of the response to radiation-induced stress shown by gill fatty acid metabolism in eels (anguilla anguilla) captured from the wild.1. in eels captured in roskilde fjord in 1972 and 1975, a specifically enhanced synthesis was found from 14c-acetate of 14c-labelled mono-unsaturated fatty acids (c16:1 and c18:1) relative to saturated fatty acids (c16:0 and c18:0) in sea water 4 days after irradiation (10 gy, 60co). 2. corresponding experiments in 1976 and 1982 showed rather the opposite: irradiation resulted in more 14c-labelled saturated fatty acids relative to unsaturated fatty acids, both in fresh and sea water. 3. the latt ...19911677881
influence of fatty acid composition of diet on cholesterol content of eel liver and muscle.the influence of different diets on cholesterol content of liver and muscle of european eel (anguilla anguilla) was studied for the first time. in control eel, cholesterol constituted near 7.5% of total lipids in liver and about 1% in muscle. feeding herring meal-55% diet produced a drastic increase in hepatic cholesterol after a 30 d period. in muscle, cholesterol content also increased after any dietary treatment. free cholesterol represented about 34% of total cholesterol in liver and about 5 ...19901692683
cloning and sequence analysis of the cdna for the pituitary glycoprotein hormone alpha-subunit of the european eel.a cdna library constructed using mrnas isolated from pituitary glands of estradiol-treated eels was screened with a cdna fragment for the rat glycoprotein hormone alpha-subunit. three out of 10,000 cdna clones were revealed and subcloned in puc13 for characterization and sequencing. all three had the same nucleotide sequence except for a single, silent change in the coding sequence for one of them, and for the location of the poly(a) tail. analysis of the deduced amino acid sequence strongly sug ...19901698669
characterization of pore-forming activity in liver mitochondria from anguilla anguilla. two porins in mitochondria?a fast purification procedure for the isolation and purification of eukaryotic porin (de pinto et al., (1987) biochim. biophys. acta 905, 499-502) was applied to liver mitochondria of the fish anguilla anguilla. a protein preparation was obtained which formed slightly anionically selective pores in reconstitution experiments with lipid bilayer membranes. the distribution of single-channel conductances had two maxima of 2.4 ns and 4.0 ns in 1 m kcl. sodium dodecylsulfate electrophoretograms of th ...19911705440
difference in the ability of blood group-specific lectins and monoclonal antibodies to recognize the abh antigens in human tissues.twelve different kinds of blood group-specific lectins have been used along with monoclonal anti-a, -b and -h antibodies for detecting the corresponding antigens in selected human tissues. although most of the lectins recognized the antigens in the tissue sections examined, they displayed marked differences in their recognition patterns in certain tissues. helix asparsa agglutinin (haa), helix pomatia agglutinin (hpa) and monoclonal anti-a antibody recognized a antigens in the mucous cells of sa ...19901705925
the effect of time on physiological changes in eel anguilla anguilla, induced by lindane.1. eel were exposed to a sublethal concentration of lindane (0.335 ppm) for 6, 12, 24, 48, 72 and 96 hr. 2. concentrations of glycogen, glucose, lactate, pyruvate and lipids were determined in gill tissue after lindane exposure. 3. gill glycogen decreased and glucose levels increased at 6 hr of treatment, lactate and pyruvate concentration increased between 6 and 48 hr. total lipid values decreased between 6 and 24 hr; thereafter, the levels increased up to 72 hr of exposure. 4. clear changes we ...19911713818
galanin-like immunoreactivity in the brain of teleosts: distribution and relation to substance p, vasotocin, and isotocin in the atlantic salmon (salmo salar).the presence of galanin-like substances and their relation to substance p-, vasotocin-, and isotocin-immunoreactive neurons and fibers in the brain of teleosts was investigated with immunohistochemical methods. two specific antisera against synthetic porcine galanin (gal) revealed cell bodies and fibers in the brain of four different teleost species (salmo salar, carassius carassius, gasterosteus aculeatus, and anguilla anguilla). in all four species the main location of galanin immunoreactivity ...19801713923
effects of lindane on fish carbohydrate metabolism.exposure of the european eel (anguilla anguilla) to a high sublethal concentration of 0.335 ppm (0.50 of the 96-hr lc50) of lindane for 6, 12, 24, 48, 72, and 96 hr affected carbohydrate metabolism. muscle glycogen levels decreased significantly (p less than 0.05) at 6, 12, 24, 48, 72, and 96 hr; liver glycogen content did not decline at any time. muscle glucose levels in fish were elevated at 6, 12, 24, 48, 72, and 96 hr but in liver, the levels increased only at 96 hr. mean values of muscle an ...19911717227
changes in selected biochemical parameters in the brain of the fish, anguilla anguilla (l.), exposed to lindane. 19911722731
comparative acute toxicities of selected pesticides to anguilla anguilla.the acute toxicities (24, 48, 72 and 96 hr) of eight pesticides to anguilla anguilla were determined. the organochlorine pesticide, endosulfan was the most toxic, with lc50 values in the range of 0.042 to 0.041 mg/l. endosulfan was followed in order of decreasing toxicity by diazinon, fenitrothion, chlorpyrifos, lindane, methidathion, trichlorfon and methylparathion. when fishes were exposed to the pesticides tested they exhibited signs of restlessness, erratic swimming, convulsions and difficul ...19911723417
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