| the life cycle of echinochasmus bagulai (trematoda: echinostomatidae). | the life history of echinochasmus bagulai, an echinostomatid trematode in birds, is reported and stages in the life cycle are described. natural infections with cercariae, which are of the gymnocephalous type, were found in the thiarid snail thiara tuberculata. metacercarial cysts were found in the gills of aplocheilus panchax, oryzias melastigma, gambusia affinis and channa punctata. adults were obtained in the small intestine of ardeola grayi. in laboratory experiements development of cercaria ... | 1991 | 1869362 |
| bioconcentration of endosulfan and monocrotophos by labeo rohita and channa punctata. | | 2000 | 11014846 |
| fly ash leachate induces oxidative stress in freshwater fish channa punctata (bloch). | oxidative stress inducing potential of fly ash leachate (fal) was studied in a freshwater fish, channa punctata (bloch). fish were exposed to fly ash leachate for 24 h and lipid peroxidation (lpo) was studied as a marker of oxidative stress. catalase (cat), glutathione s-transferase (gst) activities and levels of reduced glutathione (gsh) were also estimated in the exposed fish. fal (1 ml/l) induced lpo in all the organs and most prominent response was in the gill. it also caused induction of en ... | 2004 | 15196841 |
| evaluation of genotoxic potential of chromium (vi) in channa punctata fish in terms of chromosomal aberrations. | chromium, a widely recognized carcinogenic, mutagenic and redox active metal, is released into aquatic environments by electroplating, tannery and textile industries. elevated concentrations in sediments and interstitial waters are well documented. fishes dwelling in chromium waste infested waters are presumed to be affected by its deposits. to evaluate the genotoxic potential of chromium [cr(vi)] on aquatic bio-system, bottom feeding fishes, channa punctata, as model fish, were exposed to [cr(v ... | 2006 | 17059348 |
| correlation between biochemical properties and adaptive diversity of skeletal muscle myofibrils and myosin of some air-breathing teleosts. | functional properties of myofibrils and relative stability of myosin of five teleosts channa punctata, clarias batrachus, m astacembalus armatus, labeo rohita and catla catla adapted to different breathing modes were compared. myofibrillar contractility and m-atpase of air-breathing organ (abo) possessing c.punctata and c. batrachus were low and least affected by ph in the range of 7.1-8.5. however, their myosin isoforms were relatively thermostable, more soluble at sub-neutral ph values, betwee ... | 2006 | 17133765 |
| effects of exposure to multiple trace metals on biochemical, histological and ultrastructural features of gills of a freshwater fish, channa punctata bloch. | the trace metals are frequently encountered as mixtures of essential and non-essential elements. therefore, evaluation of their toxic effects individually does not offer a realistic estimate of their impact on biological processes. we studied effects of a mixture of four essential and toxic metals (cu, cd, fe and ni) on biochemical and morphological characteristics of the gills of a biomarker freshwater fish channa punctata (bloch) using environmentally relevant concentrations. fish were exposed ... | 2008 | 18586230 |
| heavy metals in eight edible fish species from two polluted tributaries (aik and palkhu) of the river chenab, pakistan. | concentration of heavy metals (lead (pb), cadmium (cd), chromium (cr), and copper (cu)) was determined in the liver, gills, kidneys, and muscles of eight edible fish species (channa punctata, cirrhinus reba, labeo rohita, heteropneustes fossilis, mystus cavasius, oreochromis niloticus, puntius sophore, and wallago attu) from upstream and downstream zones of the nullah aik and palkhu tributaries of the river chenab located in the sialkot district known for its tanning industries worldwide. the pa ... | 2011 | 21424780 |
| the interactive effect of elevated temperature on deltamethrin-induced biochemical stress responses in channa punctata bloch. | there are reports showing interactive effect of environmental factors with the toxic outcome of chemicals. we studied the interactive effect of elevated temperature as an abiotic stressor on deltamethrin-induced biochemical stress responses in a freshwater fish, channa punctata bloch. heat stress (~12°c above ambient temperature for 3h) and pesticide exposure (deltamethrin 0.75ppb for 48h) showed significant induction of heat shock protein-70 (hsp70) in liver, kidney and gills of fishes. elevate ... | 2011 | 21801715 |
| comparative analysis of innate immune parameters of the skin mucous secretions from certain freshwater teleosts, inhabiting different ecological niches. | the innate immune system of fish is considered first line of defense against a broad spectrum of pathogens. being a component of innate immunity and lying at the interface between fish and the aqueous environment, skin mucus plays a frontier role in protecting fish from infections. in the present study, skin mucus of cirrhinus mrigala, labeo rohita, catla catla, rita rita and channa punctata, inhabiting different ecological niches, was analyzed to characterize potential innate immune factors suc ... | 2012 | 22350522 |
| impact of tannery effluents on the aquatic environment of the buriganga river in dhaka, bangladesh. | this study presents an overview of the existence and effects of six heavy metals, chromium (cr), lead (pb), cadmium (cd), mercury (hg), manganese (mn), and aluminum (al), in tannery effluents released to the buriganga river in dhaka, bangladesh. the pollutants were found in three different sources, such as effluents from tanneries, contaminated river water and three species of fish-climbing perch (anabas testudineus), spotted snakehead (channa punctata), and black tilapia (oreochromis mossambicu ... | 2016 | 25216801 |
| peptide mapping of polymorphic myosin heavy chain isoforms in different muscle types of some freshwater teleosts. | a modified sds-page system has been employed to resolve polymorphic myosin heavy chain (myhc) isoforms in different muscle types of three freshwater teleosts displaying different modes of respiration, adaptive features and life styles. investigated species include accessory air-breather channa punctata along with exclusive aquatic breather major carps labeo rohita and catla catla. all the selected species show specificity and expressivity of at least three myhc isoforms, one each in red, head an ... | 2013 | 23086608 |
| redescription of pallisentis (brevitritospinus) indica (acanthocephala: quadrigyridae) from channa punctatus bloch & schneider (channidae) in aligarh, india with new understandings of old structures. | pallisentis indica mital and lal, 1976 was originally described from channa gatchua hamilton (channidae) in kali nadi river, aligarh, india. it was later placed in the subgenus brevitritospinus amin, heckmann, ha, luc, and doanh, 2000. our collection from the spotted snakehead channa punctatus bloch & schneider in another locality of the same stream in aligarh produced many specimens with variable traits revealing new structures that have never before been described in the acanthocephala, especi ... | 2017 | 28335683 |
| de novo sequencing and comparative analysis of testicular transcriptome from different reproductive phases in freshwater spotted snakehead channa punctatus. | the spotted snakehead channa punctatus is a seasonally breeding teleost widely distributed in the indian subcontinent and economically important due to high nutritional value. the declining population of c. punctatus prompted us to focus on genetic regulation of its reproduction. the present study carried out de novo testicular transcriptome sequencing during the four reproductive phases and correlated differential expression of transcripts with various testicular events in c. punctatus. the ill ... | 2017 | 28253373 |
| redescription of henneguya chaudhuryi (bajpai & haldar, 1982) (myxosporea: myxobolidae), infecting the gills of the freshwater fish channa punctata (bloch) (perciformes: channidae) in india. | during a survey of myxosporean parasites of freshwater fishes in meerut, uttar pradesh (up), india, spores of henneguya chaudhuryi (bajpai & haldar, 1982) were found in the gill lamellae of the spotted snakehead fish channa punctata (bloch) (perciformes: channidae). this species was described lacking several characteristics in the original description, which makes challenging the accurate diagnosis. here, we supplemented its description based on morphological, histological and molecular data. pl ... | 2017 | 28190174 |
| studies on the alterations in haematological indices, micronuclei induction and pathological marker enzyme activities in channa punctatus (spotted snakehead) perciformes, channidae exposed to thermal power plant effluent. | the present study was conducted to assess the toxicity of thermal power plant effluent containing heavy metals (fe > cu > zn > mn > ni > co > cr) on haematological indices, micronuclei, lobed nuclei and activity of pathological marker enzymes [alkaline phosphatase (alp), aspartate transferase (ast), alanine transferase (alt) and creatine kinase (ck)] in channa punctatus. total erythrocyte count (-54.52 %), hemoglobin (-36.98 %), packed cell volume (-36.25 %), mean corpuscular hemoglobin concentr ... | 2016 | 27386247 |
| evaluation of genetic toxicity caused by acid mine drainage of coal mines on fish fauna of simsang river, garohills, meghalaya, india. | fishery ecology of the simsang river, meghalaya is being threatened by large scale environmental degradation due to acid mine drainage (amd) of coal mines. in the present paper, effort has been made to evaluate the genotoxicity caused due to amd of coal mines on channa punctata under laboratory condition through comet assay, micronucleus and chromosome aberration tests. water samples were collected seasonally from affected and unaffected sites of the river and physico-chemical quality of water i ... | 2016 | 27213561 |
| seasonality of reproduction in male spotted murrel channa punctatus: correlation of environmental variables and plasma sex steroids with histological changes in testis. | the present study was undertaken to develop a comprehensive understanding of how environmental cues and sex steroids relate with cyclic changes in spermatogenesis in freshwater spotted snakehead channa punctatus that is nutritious and economically important. the seasonal histological changes in testis and annual profile of gonadosomatic index (gsi) of c. punctatus delineated the testicular cycle into four phases: regressed (december-march), preparatory (april-june), spawning (july and august) an ... | 2016 | 26961127 |
| histo-architectural alterations induced by euclinostomum heterostomum (metacercariae) infected liver of channa punctata (bloch). | present investigation was carried out to study the effect of digenetic trematode, euclinostomum heretostomum on the histo-architecture of liver of channa punctata. in case of mild infection, the metacercariae were found attached to the external surface of hepatic tissue. while in case of acute or chronic infection, the encysted metacercariae of euclinostomum heterostomum were found deeply embedded in the entire hepatic tissue due to which liver appeared thin, compressed and pale with yellowish- ... | 2012 | 24082526 |
| estimation of length-weight relationship and condition factor of spotted snakehead channa punctata (bloch) under different feeding regimes. | comparative study was conducted to observe the efficacy of different feeding regimes on growth of channa punctata. six iso- proteinous diets were prepared by using different agro industrial by-products. maximum weight gain was recorded with diet having 66.75% rice bran, 11.50% mustard cake, 23.0% groundnut cake, 5% molasses, 1.5% vitamin-mineral mixture and 0.5% salt with specific growth rate of 0.408. the experimental fish recorded the value of exponent 'b' in the range of 2.7675 to 4.3922. the ... | 2013 | 24040586 |
| chromosome breakages associated with 45s ribosomal dna sequences in spotted snakehead fish channa punctatus. | it is well known that transcriptionally inactive rrna genes are correlated with dna hyper-methylation and histone hypo-methylation and there is clear evidence in humans that dna and histone modification which alter chromatin structure are related to chromosome fragility. very little is known about the biological cause of 45s rdna fragility. in this report we characterized the chromosome breakage or gap associated with 45s rdna in a fish species channa punctatus. the rdna mapping in c. punctatus, ... | 2013 | 23065230 |
| in vivo cytogenetic and oxidative stress-inducing effects of cypermethrin in freshwater fish, channa punctata bloch. | synthetic pyrethroids are considered to be safe over other insecticides. many of the newest pyrethroids lack ecotoxicity data. however, animal data indicate that their use may pose risk to environmental biota. the cytogenetic effects of cypermethrin, an α-class type ii pyrethroid were evaluated using robust genotoxicity assay of chromosomal aberration (ca) and micronucleus (mn) tests in highly mitotic kidney cells and in erythrocytes of a freshwater fish, channa punctata bloch. in order to under ... | 2011 | 20934752 |
| sublethal exposure of heavy metals induces micronuclei in fish, channa punctata. | present studies were designed to evaluate toxic potential of three common heavy metals, adequately present in agro-industrial effluents, viz. mercury, arsenic and copper using in vivo micronucleus assay in an actinopterygiian fish, channa punctata (2n=32). ten days laboratory acclimatized fishes were divided into five groups. groups i and ii served as negative and positive controls, respectively and fishes of group iii-v were subjected uninterrupted to sublethal concentrations (10% of 96 h lc50) ... | 2009 | 19880156 |
| chromosomal aberrations in a fish, channa punctata after in vivo exposure to three heavy metals. | the studies were designed to assess the extent of chromosomal aberrations (ca) under the exposure of three common heavy metalic compounds, viz. mercuric chloride, arsenic trioxide and copper sulphate pentahydrate, in vivo using fish, channa punctata (2n=32), as a test model. prior acclimatized fishes were divided into five groups. group i and ii served as negative and positive control, respectively. an intramuscular injection of mitomycin-c (@ 1mg/kg body wt.) was administered to group ii only. ... | 2009 | 19545645 |
| relative potencies of natural estrogens on vitellogenin and choriogenin levels in the indian freshwater spotted snakehead, channa punctata: in vivo and in vitro studies. | the relative efficacies of three natural estrogens viz., estrone (e(1)), estradiol-17beta (e(2)) and estriol (e(3)) to induce synthesis of vitellogenin (vg) and choriogenin (chg) were assessed in primary hepatocyte cultures of the indian freshwater spotted snakehead, channa punctata. hepatocytes were isolated from the spotted snakehead liver by a non-enzymatic protocol. optimum culture conditions were standardized for ensuring their viability and functioning. isolated hepatocytes were cultured f ... | 2010 | 19452256 |
| genotoxic and oxidative stress-inducing effects of deltamethrin in the erythrocytes of a freshwater biomarker fish species, channa punctata bloch. | deltamethrin, an alpha-cyano class of pyrethroid insecticide is used in insect pest control and antimalaria programs in several countries including india. although various toxic manifestations of deltamethrin are reported in mammals, its ecotoxicologic dimensions are not adequately researched in ecologically and commercially important fishes. in this study, we report genotoxic effect of deltamethrin in a biomarker fish channa punctata (bloch). adult fish were exposed to three concentrations of t ... | 2009 | 18937308 |
| channa punctata brain metallothionein is a potent scavenger of superoxide radicals and prevents hydroxyl radical-induced in vitro dna damage. | mammalian brain metallothioneins (mts) have been shown to scavenge free radicals. however, a similar role for fish brain mt has not been established yet. previously, we have reported that mt from the liver of a freshwater fish, channa punctata bloch, had free-radical-scavenging activity in vitro. in this study, we report on the induction of mt in brain and other tissues of c. punctata treated with a low concentration of zinc chloride. we partially purified mt (zn-mt)-rich fraction from the brain ... | 2012 | 18561335 |
| toxicity studies of butachlor to the freshwater fish channa punctata (bloch). | the toxicity studies were conducted on the fish channa punctata (bloch) by employing static and continuous flow through systems, for the toxicant butachlor (technical grade+) and its commercial formulation+ (machete 50% ec). the lc50 values are 297.89 ppb and 247.46 ppb for 24 hr and 48 hr in static for technical and 636.45 and 546.09 for machete. in continuous flow through the values are 270.05, 233.52 to the technical and 567.85 and 481.49 respectively for machete. the tissues show qualitative ... | 2007 | 17929770 |
| exposure to polybrominated diphenyl ethers associated with consumption of marine and freshwater fish in hong kong. | concentrations of polybrominated diphenyl ethers (pbdes) in market fish have not previously been reported in hong kong. axial and ventral muscles from 10 each common species of freshwater and marine fish purchased from markets in hong kong were analyzed for 22 pbdes. among the 10 freshwater fish species, spotted snakehead (channa maculate) contained the highest level of pbdes in ventral muscle (130 ng g(-1) wet wt.). for marine fish, bigeye (priacanthus macracanthus) showed significantly higher ... | 2008 | 17804034 |
| pro-apoptotic effect of fly ash leachates in hepatocytes of freshwater fish (channa punctata bloch). | the pro-apoptotic effect of fly ash leachates (fal) was studied in the hepatocytes of an indian freshwater fish, channa punctata bloch. hepatocytes were exposed to different concentrations of '7-day' fal for 24 and 48h and various parameters of apoptosis were studied using standardized procedures. fal-induced apoptosis in hepatocytes was indicated by cytological examination, dna fragmentation and dna laddering. the induction in cytochrome-c release, caspases 3, 7, 10 and 9 activities and lactate ... | 2007 | 17052884 |
| in vitro free radical scavenging activity of hepatic metallothionein induced in an indian freshwater fish, channa punctata bloch. | mammalian metallothioneins (mt) have been reported to scavenge free radicals. there is no experimental evidence to show that fish mt has a similar property. in the present study cadmium-induced mt (cd-mt) from the liver of an indian freshwater fish channa punctata bloch was investigated for its free radical scavenging activity using three different in vitro assays. exposure to cadmium chloride (0.2 mg/kg body weight; three doses on alternate days) resulted in a marked induction of cd-mt in liver ... | 2006 | 16872588 |
| preexposure to copper modulates nonenzymatic antioxidants in liver of channa punctata (bloch) exposed to the herbicide paraquat. | | 2006 | 16652271 |
| effects of paraquat on the freshwater fish channa punctata (bloch): non-enzymatic antioxidants as biomarkers of exposure. | paraquat is a quaternary herbicide widely used for broadleaf weed control, which has been known to be a highly toxic compound for humans and animals. therefore, analysis and development of biomarkers of exposure are undoubtedly valuable in evaluating the toxicity of paraquat contaminated water bodies. the effect of a single exposure of paraquat (1 ppm) for 24 h on various non-enzymatic antioxidants was studied in freshwater fish channa punctata (bloch). the levels of the reduced glutathione were ... | 2006 | 16502204 |
| copper modulates non-enzymatic antioxidants in the freshwater fish channa punctata (bloch) exposed to deltamethrin. | the assessment of the ecotoxicological risks caused by pesticides to ecosystems are based on data on the toxicity and effects of pesticide preparations to non-target organisms like fish. deltamethrin is a widely used pesticide based on pyrethroids, which is reported to be extremely toxic to fish species. modulatory effect of copper pre-exposure (10 ppb) on deltamethrin (0.75 microg l-1)-induced oxidative stress was investigated in freshwater fish channa punctata (bloch). non-enzymatic antioxidan ... | 2006 | 16154616 |
| decreased gill atpase activities in the freshwater fish channa punctata (bloch) exposed to a diluted paper mill effluent. | aquatic habitat is affected by paper mill effluent discharge in many ways. the effect of paper mill effluent on the gill atpases was studied in freshwater fish channa punctata (bloch) exposed to 1%(v/v) of effluent for 15, 30, and 60 days. there was a time-dependent significant (p<0.05-0.001) decrease in all the atpase activities measured, viz., total, na(+), k(+)--and ouabain-insensitive atpase in gill. atpases play an important role in maintenance of functional integrity of plasma membrane and ... | 2006 | 16122799 |
| modulatory effect of cadmium injection on endosulfan-induced oxidative stress in the freshwater fish, channa punctata bloch. | | 2005 | 16094894 |
| modulatory effect of cadmium exposure on deltamethrin-induced oxidative stress in channa punctata bloch. | the modulatory effect of cadmium pretreatment (0.2 mg/kg b.w. i.p.) on deltamethrin-induced oxidative stress and alterations of antioxidants was studied in freshwater fish channa punctata bloch. lipid peroxidation (lpo) was measured as one of the indicators of oxidative stress. activities of glutathione peroxidase, glutathione reductase, and glutathione-s-transferase were also studied in liver, kidney, and gills. levels of reduced glutathione (gsh) were measured in various tissues. fish pretreat ... | 2005 | 16001157 |
| protein carbonyls: novel biomarkers of exposure to oxidative stress-inducing pesticides in freshwater fish channa punctata (bloch). | it has been established in mammalian system including humans that direct damage to proteins or chemical modification of amino acids in proteins during oxidative stress can give rise to protein carbonyls. protein carbonyl induction, as a biomarker of oxidative stress was used in laboratory studies to assess the toxic effects of pesticides in freshwater fish, channa punctata (bloch), exposed to deltamethrin, endosulfan and paraquat. protein carbonyls were measured in gills, kidney and liver. signi ... | 2005 | 21783577 |
| microcirculation of gills and accessory respiratory organs from the air-breathing snakehead fish, channa punctata, c. gachua, and c. marulius. | snakehead fish of the genus channa have well-developed air-breathing organs (abo) yet retain their gill arches for respiratory and non-respiratory functions. alterations in the macrocirculation accompany inclusion of the abo and appear to enhance gas exchange efficiency (munshi et al., 1994. anat. rec. 238:77-91). in the present study, the microcirculatory anatomy of gill and abo from two facultative air-breathing channa, c. punctata and c. gachua, and one obligate air-breather, c. marulius, wer ... | 1994 | 8116893 |
| cephalic circulation in the air-breathing snakehead fish, channa punctata, c. gachua, and c. marulius (ophiocephalidae, ophiocephaliformes). | the macrocirculation in the head of three air-breathing species of channa was examined with the aid of vascular corrosion replicas and a scanning electron microscopic study was conducted on the pseudobranch, choroid gland and lentiform body. two facultative air-breathing murrels, c. punctata and c. gachua, and one obligate air-breather, c. marulius were examined. in all three, the air-breathing organs (abo) and systemic circulations were in-parallel, and both were in-series with the branchial ci ... | 1994 | 8116892 |
| response of pectoral adductor muscle of channa punctata to altered workload. | altered workload effects were studied on the pectoral adductor muscle of c. punctata by the method of fin clipping. histochemical and biochemical results revealed the atrophy of muscle fibres and changes in the activities of sdh and m-atpase. | 1989 | 2534392 |
| histochemical and biochemical study of the caudal muscles of two teleost fishes--heteropneustes fossilis and channa punctata. | | 1984 | 6237723 |
| relative toxicity of the technical grade material, isomers, and formulations of endosulfan to the fish channa punctata. | | 1981 | 7296055 |
| life history of genarchopsis goppo ozaki, 1925 (trematoda: hemiuridae) from the freshwater fish channa punctata. | the life cycle of genarchopsis goppo a hemiurid trematode found in the stomach of channa punctata has been worked out in detail. the egg contains a fully developed miracidium at the time of liberation. the miracidium contains a ciliated covering, a long apical gland and a crown of spines at the anterior end. the snail amnicola travancorica acts as the first intermediate hose inside which the miracidium passes through sporocyst and redial generations. the cercaria is of cystophorous type and is i ... | 1978 | 722045 |
| quantitative analysis of the growth of the myotomes of freshwater teleost, ophicephalus punctatus bloch (= channa punctata). | a positive correlation was found to exist between the growth of the myotomes, in thickness, and that of the body length of ophicephalus punctatus bloch, a common freshwater teleost. the changes in the absolute and the relative growth of the myotomes, as observed in this fish, were found to be age-specific. the constancy in the mysosomatic indices as also in the ratios of the differential growth rates of the myotomes did not seem to permit any divergence from the linear relation between the growt ... | 1976 | 976701 |