Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| effects of third ventricle injection of prostaglandins on gonadotropin secretion in goldfish, carassius auratus. | 1976 | 1010304 | |
| fish swimbladder: an excellent mesodermal inductor in primary embryonic induction. | swimbladder of the crucian carp, carassius auratus, was found to be better as a vegatalizing tissue than other tissues, such as guinea-pig bone marrow, when presumptive ectoderm of triturus gastrulae was used as reacting tissue. swimbladder usually induced assemblies of highly organized mesodermal tissues, such as notochord, somites and pronephric tubules, some of which were covered by mesodermal epithelium without any epidermal covering. a special character of the effect of swimbladder was the ... | 1976 | 1003076 |
| mescaline: its effects on learning rate and dopamine metabolism in goldfish (carassius auratus). | the pharmacological action of mescaline on goldfish was studied with the bitterman-agranoff shock-avoidance test. in short term experiments with high mescaline doses an increase in learning rates was observed. similar results were obtained with apomorphine and l-dopa. however, when the fish were exposed to smaller mescaline doses (or to fluphenazine) for 3 days, their ability to avoid electric shock was reduced. apparently, mescaline induced a release of dopamine which stimulated central dopamin ... | 1976 | 991995 |
| the effects of photoperiod and temperature on the release of prolactin from the pituitary gland of the goldfish, carassius auratus l. | 1976 | 991019 | |
| reactions of the goldfish (carassius auratus auratus l.) to quantified mechanical and thermal stimuli. | goldfish can differentiate between mechanical and thermal stimuli components in combined stimulations. reactions to heated thermode (deltat = + 3 degrees c) differ from those to isotherm thermode by up to 30%. additional pretension (0.5 p) increases the reaction more than double; at simultaneously varied temperature (deltat = + 3 degrees c and + 5 degrees c), there is a further increase in reaction of 25% and 35%. the significance for the organism of the two stimuli components is discussed. | 1976 | 976435 |
| a light and electron microscopic study of the structure of the nucleus preopticus and nucleus lateral tuberis of the goldfish, carassius auratus. | 1976 | 974938 | |
| immediate response of the hemoglobin system of the goldfish, carassius auratus, to temperature change. | 1976 | 974934 | |
| fine structure of the olfactory bulb in the goldfish, carassius auratus. | ultrastructural studies have aided in identifying the principal cell types and the layers of the olfactory bulb in goldfish. the concentrically arranged four layers are: the primary olfactory nerve layer (most peripheral), the glomerular layer, the mitral cell layer, and the granule cell layer (deepest). three types of cell bodies were differentiated by their size and cytoplasmic organelles: mitral cells, granule cells and short axon cells. the axons of the primary olfactory nerve formed synapti ... | 1976 | 974743 |
| [the action of hormones on the male germinal cells of carassius auratus l. in organ culture]. | 1976 | 955396 | |
| [action of hormones on the female germinal cells of carassius auratus l. in organ culture. sex reversal and oogenesis in vitro]. | 1976 | 955382 | |
| histochemistry and ultrastructure of pre- and post-ovulatory follicles in the ovary of the goldfish, carassius auratus. | 1976 | 949659 | |
| [life cycle of the trematode, crowcrocaecum skrjabini (iwanitzky, 1928) (allocreadiata, opecoelidae)]. | crowcrocaecum skrjabini has an intermediate and additional hosts. the mollusk lithoglyphus naticoides serves as an intermediate host; the invasion extensity is 43.88% in summer and 28.57% -- in autumn and winter. in the experiment gammarus (rivulogammarus) balcanicus has turned to be an additional host and carassius auratus givelia -- a definitive hot. the descriptions are given of cercaria (which belongs to a cotylocercal type), metacercaria and marita, reared in the experiment. | 2007 | 940689 |
| [multiplicity of the molecular forms of acetylcholinesterase and thermal acclimatization in carassius auratus]. | multiple forms of acetylcholinesterase have been studied in goldfish adapted to 15 degrees c and 25 degrees c. three forms of enzyme (sedimenting at 18s, 12s and 5s) could be distinguished by sucrose gradient centrifugation. their molecular and enzymatic properties did not vary with environmental temperature. it was noted that the relative proportion of the three forms differed between brain and muscle extracts, the 18s forms predominating in muscle (about 75 per cent) the 12s forms being more a ... | 1976 | 938690 |
| the effects of vision on the general locomotor behaviour of the goldfish, carassius auratus. | comparison of the locomotor behaviour of normal, unilaterally and bilaterally blinded goldfish (carassius auratus) demonstrated the roles of perspective vision (depth perception), which requires binocular vision, and of vision provided by only one eye, in the control of locomotion. because normal and bilaterally blinded fish exhibited similar size and direction of angles of turn, a similar number of consecutive turns in the same direction and the same turning frequency, normal, binocular vision ... | 1976 | 937768 |
| fine structure of the olfactory epithelium in the goldfish, carassius auratus. a study of retrograde degeneration. | the fine structure of the goldfish olfactory epithelium was studied by transmission and scanning electron microscopy. six different cell types were distinguished. identification of the olfactory receptor cell was accomplished by use of retrograde degeneration studies. two morphologically distinct types of olfactory receptor cells were identified: one type bears radially oriented cilia (type i cell); the other type bears microvilli (type ii cell). the other four cell types were not identifiable a ... | 1977 | 922848 |
| uptake, distribution, and turnover of catecholamine radiolabel in the goldfish, carassius auratus l. | 1977 | 922609 | |
| correlation of activity and weight in comet goldfish (carassius auratus) at differing water temperatures. | correlations of activity and weight at three water temperatures, 20 degrees, 26 degrees, and 30 degrees c, were examined in the comet goldfish (carassius auratus). for the 12 subjects general activity scores increased as water temperature increased. heavier subjects were more active at low temperatures while lighter subjects were more active at higher temperatures. | 1977 | 905098 |
| effects of dexamethasone and metopirone on ovulation in the goldfish, carassius auratus. | 1977 | 902179 | |
| anaerobic metabolism in goldfish (carassius auratus). | 1977 | 902178 | |
| cue validity in a goldfish (carassius auratus) respiratory conditioning situation. | 1977 | 897041 | |
| behavioural thresholds for diffuse illumination in the goldfish. | thresholds for diffuse, broad-band illumination were obtained for the goldfish (carassius auratus) by avoidance conditioning. the light source was a television cathode-ray tube whose output was controlled over a range of 140 db by a combination of 'brightness' control, blanking of scan lines, and neutral density filters. the threshold was calculated in terms of irradiance to be 2-9 x 10(-6) muw cm-2 (+/- a standard deviation of 1-4). the determination of absolute, rather than relative, values, a ... | 1977 | 894180 |
| the oxygen consumption of some tissues from hypophysectomized goldfish, carassius auratus l. | hypophysectomy has no effect on the o2 consumptios reduction in liver o2 consumption is attributed to the increased glycogen content that follows hypophysectomy which has the effect of increasing the nonmetabolizing dry weight component of the cells. | 1977 | 891861 |
| genetic and developmental analysis of some new color mutants in the goldfish, carassius auratus. | the genotypes of three color mutants in goldfish: a depigmentation character of larval melanophores, albinism and a recessive-transparent character, were analyzed by crossing experiments. the depigmentation character in the common goldfish is controlled by two dominant multiple genes, dp1 and dp2, and only fish with double recessive alleles dp1dp1 dp2dp2 can retain larval melanophores throughout life. albinism is also controlled by double autosomal genes, p and c. the genotype of an albino fish ... | 1977 | 885340 |
| amebiasis in goldfish. | five cases of amebiasis were diagnosed in goldfish (carassius auratus) from home aquariums and from a laboratory aquarium. granulomas containing amoebae were in many organs but were most numerous in kidneys. because there were pseudopods, food vacuoles, vesicular nucleoli and other ultrastructural characteristics of the organisms, we identified the organisms as amoebae. on the basis of mitotic stages it is possible they belong in the family hartmannellidae. | 1977 | 883087 |
| estradiol-17 beta effects on lipid and carbohydrate metabolism and on the induction of a yolk precursor in goldfish, carassius auratus. | 1977 | 881939 | |
| phylogenetic origins of immune recognition: lymphoid heterogeneity and the hapten/carrier effect in the goldfish, carassius auratus. | 1977 | 872223 | |
| mitochondria-rich (chloride) cells in the gill epithelia from four species of stenohaline fresh water teleosts. | the mitochondria-rich (chloride) cells have been found to be present in the gill epithelia of four species of stenohaline fresh water teleosts. the cytoplasm of these chloride cells contains an extensive network of cytoplasmic tubules which communicate with intercellular spaces bordering the lateral and basal cell surfaces. numerous vesicles with fairly electron-dense interiors are also present in the apical cytoplasm of chloride cells. the apical surface of a chloride cell forms an apical pit, ... | 1977 | 872189 |
| neurofilamentous changes in goldfish (carassius auratus l.) brain in relation to environmental temperature. | the presence of neurofilaments in the synaptic boutons in the brains of goldfish maintained at 5 degrees c for 177 days or more is reported. neurofilaments are not found in boutons of control fish kept at 15degreesc. it is suggested that the neurofilaments may be equated with neurofibrillary rings seen by light microscopy. neurofilaments have been implicated in axoplasmic transport and, therefore, irregularities in the occurrence or appearance of these filaments may reflect alterations in their ... | 1977 | 859011 |
| delayed regeneration of the retino-diencephalic projections in the goldfish, carassius auratus. | 1977 | 851868 | |
| direct ipsilateral retinal projections in goldfish (carassius auratus). | 1977 | 851864 | |
| differential biosynthesis of molecular species of 1,2-diacyl-sn-glycerols and phosphatidylcholines in cold and warm acclimated goldfish (carassius auratus l.). | the initial incorporation of glycerol-3h into the molecular species of liver 1,2-diacyl-sn-glycerols and phosphatidylcholines was studied in vivo using goldfish acclimated to 10 c and 30 c. a 1.5- and 2.2-fold higher proportion of the total radioactivity in the diacylglycerols from cold acclimated fish was found to be associated with the trienoic and pentaenoic species, respectively, when compared to warm acclimated fish. in the phosphatidylcholines, 1.9- and 1.3-fold greater percentages of the ... | 1977 | 846321 |
| pituitary control of pigmentation in xanthic, moor, and white carassius auratus l. | 1977 | 837295 | |
| effects of thyroxine administration on plasma thyroxine levels in the goldfish, carassius auratus l. | 1977 | 837279 | |
| [effects of the temperature on the level of plasma gonadotropins and spermatogenesis of the goldfish, carassius auratus]. | 1977 | 837278 | |
| cytochemical characterization of goldfish (carassius auratus l.) dermis with special reference to the pigment cells. | the dermal cells in grey, xanthic, and white goldfish integuments were cytochemically characterized for the following enzymatic activities: tyrosinase, dopa-oxidase, cytochrome oxidase, monoamine oxidase, peroxidase, non-specific esterase, cholinesterase, nad-diaphorase, nadp-diaphorase, aryl sulfatase, nucleotide phosphodiesterase, beta-glucuronidase, acid phosphatase, alkaline phosphatase, adenosine triphosphatase, thiamine pyrophosphatase, glucose-6-phosphatase, aldolase, as well as succinate ... | 1976 | 827186 |
| differentiation of antigen-binding cells in the teleost carassius auratus and in the anuran bufo marinus. | 1975 | 816712 | |
| effect of catecholamines and synthetic mammalian hypothalamic hormones on the adenylyl cyclase activity of the pituitary of the teleost, carassius auratus. | 1975 | 805742 | |
| effects of gold thioglucose on food intake, growth and forebrain histology in goldfish, carassius auratus. | 1976 | 792914 | |
| stimulation of gonadotropin secretion by intraventricular injection of hypothalamic extracts in the goldfish, carassius auratus. | 1976 | 791745 | |
| effect of synthetic luteinizing hormone-releasing hormone (lh-rh) on ovulation and pituitary cytology of the goldfish carassius auratus. | 1976 | 782674 | |
| effect of synthetic luteinizing hormone-releasing hormone (lh-rh) on ovulation and pituitary cytology of the goldfish carassius auratus. | 1976 | 782673 | |
| synaptic contacts of the horizontal cells in the retina of the marine teleost, callionymus lyra l. | the horizontal cell system in the retina of the fish callionymus lyra l. was investigated light microscopically and electron microscopically. one type of rod horizontal cells, which are only found in the mixed ventral part, exclusively contacts spherules with lateral endknobs in the triads. three types of cone horizontal cells occur. the first type, c-h1, contacts pedicles of pale and dark double cones and single cones. the processes always have a lateral position in the triads. this type has a ... | 1979 | 762279 |
| effects of forebrain ablation on growth in teleost fishes. | the effect of forebrain extirpation on food uptake and growth was studied in different teleost species. in the case of wild species such as carassius gibelio and macropodus opercularis concolor, a prolonged enhancement of food uptake and body growth was found following forebrain ablation. in the case of domesticated species such as the common goldfish (carassius auratus) and macropodus opercularis, there was no effect of forebrain extirpation on either food uptake or growth. | 1978 | 754418 |
| head-kidney thyroid in some indian teleosts. | six species of fishes, with different habits and belonging to different habitats and families, have been investigated. only four, namely discognathus lamta, carassius auratus, glossogobius giuris and polynemus sexfilis have shown the presence of heterotopic thyroid follicles in their head-kidneys. the heterotopic thyroid follicles of discognathus lamta appear to be functional while those of the rest of fishes are in non-functional state. | 1978 | 749388 |
| the effects of pinealectomy on pituitary prolactin levels in carassius auratus exposed to various photoperiod-temperature regimes. | pinealectomy has an influence on pituitary prolactin levels in goldfish maintained under certain photoperiod-temperature regimes. the effects of pinealectomy on pituitary prolactin content depend on photoperiod and time of sampling. thus, differences between pinealectomized and sham operated animals may be due to a shift of a daily variation in pituitary prolactin levels. the pineal in fishes may thus be involved in photoperiod influences on daily prolactin rhythms. | 1978 | 747999 |
| topography of estrogen target cells in the forebrain of goldfish, carassius auratus. | the topographical distribution of estradiol-concentrating cells in the brain of male and female teleost, carassius auratus, was determined by autoradiography, after injection of 3h estradiol-17beta. radioactively labeled neurons are found in specific regions of the forebrain, with a similar topographical distribution both in males and females. regions of accumulation of estrogen target cells include the supracommissural area of the telencephalon, the preoptic area, the central hypothalamic area ... | 1978 | 721971 |
| [behavioral and ultrastructural study of the effect of colchicine application to mauthner neurons of the goldfish carassius auratus]. | 2013 | 716711 | |
| microspectrophotometric studies on the visual pigment in the intact retina of the goldfish, carassius auratus (linn.). | the visual pigments in intact retinas of the common goldfish were examined by microspectrophotometry. difference spectra free of photoproduct contamination had absorbance maxima at lambda527 nm +/- 2 nm. the average pigment density, about 0.32, was almost invariant with regard to retinal location and specimen size. traces of a photoproduct absorbing maximally at lambda480-490 nm were found. the normalized "absorbance" curve deviated from standard templates. it was suggested that this was an effe ... | 1978 | 715263 |
| seasonal effects of pinealectomy on gonadal activity in the goldfish, carassius auratus. | 1978 | 687709 | |
| external inhibition in a goldfish (carassius auratus) classical conditioning situation. | goldfish were classically conditioned with a light as the cs and shock as the us. the ur was a decrease in respiration. after 15 or 60 conditioning trials the fish were tested with novel stimuli (clicks) during the cs-us interval. high and moderate intensity novel stimuli produced a significant decrease in crs (external inhibition) for fish with 60 conditioning trials (5.5 or 10.5 sec cs-us interval), but not fish with 15 conditioning trials. low intensity novel stimuli produced no evidence for ... | 2003 | 683725 |
| the kidney of the prussian carp, carassius auratus gibelio (cyprinidae). iii. glycogen-rich cells in the distal segment of nephronic tubule. | glycogen may be present in considerable amount in the distal segment of the nephronic tubule of a teleost freshwater fish, as revealed by light- and electron-microscopical observation. adaptation of crassiss auratus gibelio to increased salinity causes alterations of the cell fine structure (e.g. mitochondria and baso-lateral infoldings) but apparently does not influence deposition of glycogen. however glycogen storage is directly controlled by environmental temperature and may be part of an ann ... | 1978 | 675668 |
| auditory masking patterns in the goldfish (carassius auratus): psychophysical tuning curves. | the masking effects of tones on the detection auditory signals were studied in goldfish using the psychophysical tuning-curve paradigm. for signals below 350 hz, masking is an inverse function of the frequency separation between masker and signal; a finding consistent with previous masking studies on fishes, birds and mammals. for signals above 350 hz, masking peaks occur both in the 350 hz region and at the frequency of the signal. quantitative comparisons with recent neural tuning curves for g ... | 1978 | 670874 |
| the effect of training on the swimming muscles of the goldfish (carassius auratus). | goldfish (carassius auratus) were exercised continuously for periods of 28 days at swimming speeds of 1.5, 3.0 and 4.5 body lengths per second and their rates of growth were determined. changes in muscle fibre size were examined, as were changes which occurred in the concentrations of the major chemical constituents of these cells. these fish, typical of the carp family in that they are found only in still or slowly moving water, did not adapt well to the flowing water environment at any swimmin ... | 1978 | 670869 |
| effects of pinealectomy and melatonin treatment on liver and plasma metabolites in the goldfish, carassius auratus. | 1978 | 669253 | |
| medulloepithelioma of the ciliary body in the goldfish (carassius auratus). | a medulloepithelioma of the ciliary body in the right eye of a 1-year-old goldfish (carassius auratus) had spindle and epithelial cells arranged either in columns or around a central lumen. vitreous-like material was found within the tumor. a medulloepithelioma is a most unusual tumor in fish in which ocular tumors are rare. | 1978 | 664187 |
| distribution of fibres reacting with an alpha-endorphin antiserum in the neurohypophysis of carassius auratus and cyprinus carpio. | a strong positive immunoreaction with an alpha-endorphin antiserum occurs in two distinct sites of the goldfish and carp neurohypophysis. fluorescent nerve terminals are found in the laminar nerve processes located in the rostral pars distalis, but the immunocytological reaction is mainly localised on the nerve processes of the posterior neurohypophysis lying between the intermediate lobe cells. almost all the digitations of the neurohypophysis are strongly fluorescent. the immunoreactive fibres ... | 1978 | 657242 |
| antigen recognition and immune response in goldfish carassius auratus at different temperatures. | 1978 | 640118 | |
| some observations on the morphological evidence for mechanism of the bile secretion. | the morphological evidence of the intracellular route of bile secretion was investigated in the liver of goldfish (carassius auratus) as revealed by electron microscopy. smooth surfaced tubules or cisterns within or adjacent to the golgi apparatus showed linear saccular forms and contained sparse particulate or cloudy materials of low electron density. the isolated vacuoles were restrictedly found between the golgi apparatus and the intracellular bile canaliculus or hepatocytic side at the zone ... | 1978 | 636824 |
| effects of actinomycin d on brain rna synthesis and discrimination learning in the goldfish (carassius auratus). | intracranial injection of actinomycin d 2 microgram inhibited about 70% of the brain rna synthesis from 3 hr to 4 days after injection in the goldfish. under these conditions, fish were given 4-day-training of visual discrimination between a card with vertical stripes and one with horizontal stripes. fish injected intracranially with actinomycin d showed deficits in between-day retention (long-term memory) but not interruption of within-day acquisition (short-term memory). it is suggested that b ... | 1977 | 607238 |
| [study of 50 strains of aeromonas hydrophilia isolated from fishes]. | a bacteriological survey of the healthy goldfish (carassius auratus) demonstrated the frequent occurrence of a. hydrophila. the biochemical characters and the sensitivity to 29 chemiotherapics and 15 antiseptics of 50 fish originating strains were studied and compared with a number of strains, implicated in human pathology. the results of this study indicate a good agreement for the biochemical characters and the sensitivity to chemiotherapics between the fish and the human strains. owing to thi ... | 1977 | 603101 |
| neurofibrillar changes in goldfish (carassius auratus l.) brain in relation to environmental temperature. | neurofibrillar changes occur in the brains of goldfish, carassius auratus l., maintained at 5 degrees c for 177 days or more under a 12-hour photoperiod. in paraffin sections impregnated by the silver method of holmes, the light microscopic appearance of the neurofibrillary change was evidenced by black rings 1 micrometer to 2 micrometer in outside diameter. a quantitative study showed the mean number of rings to be: optic tectum layer 3, 1.34 x 10(2)/mm(3), layer 5, 1.14 x 10(2)/mm(3), nucleus ... | 1977 | 598442 |
| [subcutaneous fibroma of the "hibuna", carassius auratus (author's transl)]. | 1977 | 596119 | |
| role of the thyroid gland in ovarian maturation of the goldfish, carassius auratus l. | 1977 | 589528 | |
| microelectrophoretic identification of pituitary prolactin in carassius auratus. | 1978 | 581757 | |
| studies on fish scale formation and resorption. iii. fine structure and calcification of the fibrillary plates of the scales in carassius auratus (cypriniformes: cyprinidae). | electron microscopic investigation of scales of the goldfish carassius auratus revealed that the lamellae of fibrillary plates contain sheet-like structures composed of vertically oriented collagen fibers embedded in an organic matrix. the fibers (tc fibers) are smaller in diameter (35-45 nm) than those of the lamellae and the matrix is stained intensely with lead citrate. the sheet-like structures as well as the lamellae are formed by fibroblasts located beneath the lamellae. the orientation of ... | 1979 | 574424 |
| gonads of carassius auratus (teleosts) in organ culture: a new technique and the effects of testosterone. | the use of a semi-natural medium (eagle's mem supplemented with chicken embryo extract) appears to be satisfactory for ovarian and testicular fragment cultures of carassius auratus. the male germ cells show a normal degeneration which might be attributed to a lack of pituitary hormones: gonadotropic and, possibly, somatotropic hormone. the ovarian fragments maintain a normal organization during 21 days of culture. only the oocytes in late vitellogenesis massively atresiate at the beginning of cu ... | 1977 | 558153 |
| [the effect of the distribution of practice on the learning and forgetting in carassius auratus auratus linné]. | the significance of massed and distributed practice in discrimination learning to criterion by goldfish was studied. all animals were trained to discriminate between 6 horizontal black and white stripes (positive stimulus) and 2 vertical black and white stripes (negative stimulus). 5 groups of animals, 12 ss each, got different training programs. groups varied in number of trials per day (30, 10, 5 successive trials) and in distribution of trials over the day (30 trials given in blocks of 5 with ... | 1979 | 547582 |
| histological observation of some of the endocrine glands in the sterile carp-funa hybrid (f1), with special reference to the hypophysis. | some endocrine glands of the carp-funa hybrids were studied with a light microscope to elucidate their detailed structure and the possible causal factor of sterility in the males. adult specimens of carp (cyprinus carpio), gengoroh-buna (carassius auratus cuvieri), and their hybrid (f1) were examined. the hybrid males are sterile as manifested by the failure of meiosis and seminomatous neoplasm in their testes. the hybrid females revealed well-developed ovaries, but their fertility was not teste ... | 1979 | 539886 |
| metabolism of 14c-heptachlor in goldfish (carassius auratus). | 1979 | 539836 | |
| non-simultaneous auditory masking in the goldfish, carassius auratus. | auditory thresholds were determined for 500 hz pure tone pulses of 15, 25 and 50 ms duration presented leading, following or simultaneously with noise pulses of 50 or 250 ms duration. masking by the noise decreased: (i) with an increase in tone pulse duration; (ii) with a shortening of the noise pulse duration; and (iii) as the interval between tone and noise pulses was increased from 0 to 350 ms. the effect of the noise was independent of whether the noise led or followed the pure tone. it is s ... | 1979 | 536700 |
| effects of outboard motor exhaust emissions on goldfish (carassius auratus). | goldfish (carassius auratus) were exposed to outboard exhaust products in water or to toluene (a constituent of outboard motor exhaust water) via a continuous flow bioassay dosing apparatus. various physiologic and pathologic changes were noted. in the blood a consistent decrease (p less than 0.05) in the partial pressure of oxygen, a significant increase (p less than 0.05) in the partial pressures of carbon dioxide, and significant decreases (p less than 0.05) in ph and oxygen saturation were f ... | 2013 | 528841 |
| [parasitofauna of the silver crucian (carassius auratus gibelio bloch, 1783) catched in the carp ponds of the leczyn-włodawa lake district]. | 2004 | 524892 | |
| the culture of tissue from the ovary of the goldfish carassius auratus. | small pieces of ovarian tissue derived from immature goldfish have been maintained in culture periods of up to three months. the progress of the culture was monitored by light and electron microscopy and showed that although degenerative changes occurred in the large oocytes the small oocytes and oogonia survived for the duration of the culture. quantitative studies indicate that both oogonia and small oocytes increase in number during the first three weeks of culture and observations from exper ... | 1979 | 519709 |
| visual pigment absorbance and scotopic spectral sensitivity in the goldfish, carassius auratus. | factors relating to the comparison of the absorbance spectra of visual pigments to experimentally determined relative spectral sensitivities of the eye are discussed with specific reference to the goldfish. it is concluded that the experimentally determined scotopic sensitivity of the goldfish can be directly related to the absorbance of goldfish porphyropsin without the need to infer input from long wavelength-sensitive cones. | 1979 | 515480 |
| fate of 14c-cis-chlordane in goldfish, carassius auratus (l.). | 1979 | 497443 | |
| liquid chromatographic demonstration of catecholamine release in fish heart. | high-pressure liquid chromatography (hplc) was used to assay for catecholamines released into the heart of the goldfish (carassius auratus l.) upon stimulation of vagal nerve fibers. stimulation induced the release of norepinephrine, epinephrine and dopamine into the lumen of the perfused, isolated heart. the results suggest that heart activity in teleosts is directly modulated by functional adrenergic, cardioacceleratory nerve fibers. | 1979 | 490140 |
| dna reassociation kinetics in diploid and phylogenetically tetraploid cyprinidae. | four diploid and three phylogenetically tetraploid cyprinidae (ostariophysi) have been characterized as for nuclear dna content, modal chromosome number and dna reassociation kinetics (hydroxyapatite chromatography). among the diploid species nuclear dna content (10(-12) g dna/2c) was 1.62 for tinca tinca, 1.87 for scardinius erythrophthalmus, 2.53 for leuciscus cephalus and 2.75 for alburnus alburnus, while the phylogenetically tetraploid species carassius auratus, barbus barbus and cyprinus ca ... | 1979 | 490124 |
| the effects of lithium chloride on response to salient and nonsalient stimuli in carassius auratus. | the exploratory behaviour of 20 goldfish was investigated to see whether it was affected by treatment with lithium chloride. when familiar and novel stimuli were readily discriminable, lithium treatment had no effect on exploration. in a second study, using 20 fish, it was shown that when novel and familiar stimuli were less markedly different from each other, exploratory responses to the novel stimulus were reduced by lithium. the findings may be related to a general suppressant action of lithi ... | 1979 | 489261 |
| in vitro estradiol-17 beta actions on hypothalamic monoamine oxidase activity in the goldfish, carassius auratus. | 1979 | 488689 | |
| hypothalamic monoamine oxidase, a component in the serotonergic control of pituitary prolactin content in carassius auratus l. | 1979 | 488682 | |
| the effects of light reception on circulating estrogen levels in female goldfish, carassius auratus: importance of retinal pathways versus the pineal. | 1979 | 488670 | |
| ultrastructure of the swim bladder of the goldfish, carassius auratus. | the swim bladder of the cyprinid carassius auratus (goldfish) is a two-chambered organ connected to the esophagus by a pneumatic duct. the anterior chamber is lined by a single type of squamous epithelial cell. two types of epithelial cells are present in the posterior chamber. flattened cells with differences in the electron density of the cytoplasm line most of the chamber. darker cells generally contain large amounts of glycogen. cuboidal epithelial cells also occur in the posterior chamber. ... | 1979 | 476786 |
| effects of lithium on visual perceptual thresholds in the goldfish (carassius auratus). | 1979 | 460680 | |
| ruffed cell: a new type of neuron with a distinctive initial unmyelinated portion of the axon in the olfactory bulb of the goldfish (carassius auratus) i. golgi impregnation and serial thin sectioning studies. | a new type of neuron was recognized in the olfactory bulb of the goldfish (carassius auratus) by means of light and high voltage electron microscopy of golgi-impregnated material, combined golgi-electron microscopy, and electron microscopy of serial thin sections. the neuron is located in the layer between the olfactory nerve layer and the anterior olfactory nucleus. it has a spherical cell body, about 10--20 microns in diameter, and several dendrites which form a spherical dendritic field, abou ... | 1979 | 457934 |
| lithium effects on social aggregation in the goldfish (carassius auratus). | in the first experiment, using 240 goldfish in pairs, the effects of lithium chloride on social aggregation were observed. it was found that aggregation was reduced between two fish when both had received lithium treatment. when, in the second experiment, 24 fish were investigated in groups of three, it was found that maximal disruption of aggregation occurred when all three fish were lithium treated, but that partial social disruption occurred following lithium treatment of two out of three fis ... | 1979 | 449426 |
| ovulatory surge of gonadotropin in the goldfish, carassius auratus. | 1979 | 447065 | |
| electron microscopic localization of [125i]alpha-bungarotoxin binding sites in the outer plexiform layer of the goldfish retina. | light and electron microscope autoradiography were performed on goldfish (carassius auratus) retinas incubated in [125i]labelled alpha-bungarotoxin. the toxin was bound preferentially to membrane receptors in the inner and outer plexiform layers. binding was suppressed by 10(-5) m nicotine or 10(-5) m native alpha-bungarotoxin. electron microscopic analysis of the outer plexiform layer (opl) strongly suggested that alpha-bungarotoxin binding sites were located on small bipolar cell dendritic pro ... | 1979 | 438870 |
| the effect of pinealectomy on serum k+ and cl- levels in the goldfish, carassius auratus. | 1979 | 437492 | |
| effects of forebrain ablation on taste aversion in goldfish (carassius auratus). | 1979 | 437009 | |
| tectal projections in the goldfish (carassius auratus): a degeneration study. | efferents revealed by degeneration staining following tectal lesions in goldfish are presented. four major projections were found. ascending ipsilateral projections to pretectal-diencephalic areas exit the tectum rostrally and laterally and terminate in the area pretectalis (ap), lateral geniculate (lgn), nucleus pretectalis (np), and nucleus rotundus (nr). ascending contralateral projections exit rostrally and possibly laterally, enter the posterior and postoptic commissures and terminate in th ... | 1973 | 422751 |
| new observations on the fine structure of the liver in goldfish (carassius auratus). | a re-examination of goldfish liver was made through the use of sem of fractured samples and tem of ultrathin-sections and freeze-etch replicas. several new hepatic fine structures described in the present study are morphologically similar to those reported previously in many higher vertebrates including mammals. hepatic sinusoids of goldfish contain fenestrations which are arranged into sieve plates. although the hepatic plates are made up of two layers of hepatocytes, the parenchymal cells of g ... | 1977 | 421256 |
| recovery of tectal nicotinic-cholinergic receptor sites during optic nerve degeneration in goldfish. | the concentration of cholinergic nicotinic-like sites as measured by alphabungarotoxin (alphabutx) binding, decreased in the goldfish (carassius auratus) optic tectum after optic nerve disconnection. initially, the rate of loss of sites is greater than the rate of tissue or protein degradation in experiments where disconnection was achieved either by unilateral optic nerve crush or by enucleation of one eye. when the crushed optic nerve is allowed to regenerate and form behaviorally potent conne ... | 1979 | 421155 |
| [immunocytological localization of peptide analogs of alpha-endorphin in several neurons of the lateral nucleus tuberis of carassius auratus l. and cyprinus carpio l]. | neurons of the pars lateralis of the n.l.t. of carassius auratus and cyprinus carpio display a positive immunocytological reaction with an anti alpha-endorphin serum. it is assumed that the peptides produced by these neurons are similar, if not identical, with alpha-endorphin, but their morphinomimetic properties have still to be established. peptides of this kind may participate in the regulation of pituitary functions. | 1977 | 413644 |
| trysinase positive oculocutaneous albinism in the goldfish, carassius auratus l., and ultrastructural and biochemical study of the eye. | ultrastructural studies, and cytochemical and biochemical determinations of tyrosinase activity were conducted on the pigment epithelium of albino and xanthic goldfish eyes. in eyes of xanthic goldfish, two types of melanosomes are present, spherical and elongated. melanized melanosomes are absent in the eyes of the albino goldfish, but elongated lamellar premelanosomes are observed. internal vesicles are present in both melanosome types in the pigment epithelium of the xanthic goldfish but are ... | 1977 | 411572 |
| immunocytochemical identification of enkephalinergic neurons in the hypothalamic magnocellular preoptic nucleus of the goldfish, carassius auratus. | our immunocytochemical investigation of the magnocellular neuroendocrine system in the goldfish hypothalamus reveals enkephalin (enk)-containing neurons interspersed among the vasotocin (vt)- and isotocin (it)-containing neurons of the preoptic nucleus. the perikarya of the enk, vt, and it neurons do not show distinct morphological differences at the level of light microscopy and are not located preferentially within the nucleus. separate enk, vt and it fibers course laterally and ventrally thro ... | 1979 | 387250 |
| gonadotropin release after implantation of anti-estrogens in the pituitary and hypothalamus of goldfish carassius auratus. | 1977 | 330311 | |
| intestinal peroxisomes of goldfish (carassius auratus)--examination for hydrolase, dehydrogenase and carnitine acetyltransferase activities. | 1. rate sedimentation and isopycnic centrifugation were used to analyse the subcellular sites of enzymes in homogenates of goldfish intestinal mucosa. 2. the results allowed the following allocations to be made: carnitine acetyl transferase-mitochondrial and peroxisomal, xanthine dehydrogenase and nad: alpha-glycerophosphate dehydrogenase soluble phase, nadp: isocitrate dehydrogenase soluble phase and mitochondrial, and 2-naphthyl laurate hydrolase microsomal and/or brush border. 3. histochemist ... | 1979 | 318295 |
| morphologic and biochemical characterization of erythrophoromas in goldfish (carassius auratus). | the properties of spontaneous cutaneous erythrophoromas that occurred in 17 adult goldfish (carassius auratus) were described. this study was based on combined histology, cytochemistry, electron microscopy, and biochemical analysis. tumors that varied from 0.4 to 2.7 cm in maximum diameter were located on various parts of the skin. as shown by light microscopy, tumors were composed of red- to orange-pigmented, dendritic, stellate, or spindle-shaped cells, which coalesced into an excrescence in t ... | 1978 | 281553 |
| effects of hypothalamic lesions on the food intake of the goldfish (carassius auratus). | goldfish were trained to perform an operant in response in order to obtain food, thereby allowing the food intake to be accurately determined. the normal daily food intake was established for each fish before it was given a sham operation or bilateral hypothalamic lesions. it was then observed over a period of up to 60 days. lesions of the lateral areas of the hypothalamus were found to cause cessations of operant feeding of up to 60 days duration, and cessations of feeding on manually presented ... | 1978 | 273462 |
| effects of photoperiodicity on serum glucose levels in goldfish (carassius auratus). | 1975 | 240559 |