| mercury content of some marine fish from the southern caribbean sea. | the mercury concentration in muscle and liver of 63 specimens, comprising 17 species of edible fish from coastal waters of the caribbean sea near cumaná, was determined by cold vapour atomic absorption spectrophotometry. the hg content of edible muscle tissue, expressed on a fresh weight basis, varied from 0.048 microgram g-1 in lisa (mugil curema) to 0.190 microgram g-1 in tajali (trichiurus lepturus), with an average value of 0.096 +/- 0.042 microgram g-1. the corresponding values for liver va ... | 1988 | 3212454 |
| evidence for arylamine n-acetyltransferase in the nematode anisakis simplex. | n-acetyltransferase activities with p-aminobenzoic acid and 2-aminofluorene were determined in anisakis simplex, a nematode found in the intestine of the salt water fish trichiurus lepturus. the n-acetyltransferase activity was determined using an acetyl coa recycling assay and high pressure liquid chromatography. the n-acetyltransferase activity from a number of anisakis simplex whole tissue homogenizations was found to be 2.89 +/- 0.52 nmol/min per mg for 2-aminofluorene and 2.54 +/- 0.45 nmol ... | 1996 | 8827040 |
| new species of metacaligus (caligidae, copepoda) parasitic on the cutlassfish (trichiurus lepturus) of taiwan, with a cladistic analysis of the family caligidae. | metacaligus latus n. sp. (copepoda, caligidae) is described from specimens found parasitic in the oral and gill cavities of the cutlassfish, trichiurus lepturus linnaeus, caught from the strait of taiwan and landed at dong-shih fishing port in chiayi county, taiwan. it is close to m. uruguayensis (thomsen, 1949), but can be distinguished from the latter by the possession of shorter caudal rami in both sexes and wider cephalothorax and genital complex in the male. cladistic (phylogenetic) analysi ... | 2002 | 12520096 |
| parasitic helminth fauna of the cutlass fish, trichiurus lepturus l., and the differentiation of four anisakid nematode third-stage larvae by nuclear ribosomal dna sequences. | the helminth fauna of the gastrointestinal tract and abdominal cavity of cutlass fish, trichiurus lepturus l., off the taiwanese coast of the north-western pacific was investigated. the following helminths were found: (1) nematodes--anisakis simplex, hysterothylacium aduncum, porrocaecum decipiens, raphidascaris trichiuri; (2) digeneans--adult lecithochirium trichiuri; and (3) cestodes-plerocercoids of proteocephalus spp. the third-stage larvae of these four anisakid nematodes were characterized ... | 2004 | 15133659 |
| seasonal differences in mercury accumulation in trichiurus lepturus (cutlassfish) in relation to length and weight in a northeast brazilian estuary. | at tropical latitudes, and especially on the semi-arid coasts of the brazilian northeast, the rainfall regime governs the water quality of estuaries due to the pronounced difference between the rainy and dry seasons. these changes may be responsible for seasonal changes in bioavailability of mercury (hg) and other pollutants to the estuarine and coastal biota. mercury bioaccumulates along estuarine-marine food chains usually result in higher concentrations in tissues of top predators and posing ... | 2009 | 19290559 |
| [occurrence of neobenedenia melleni (monogenea: capsalidae) in trichiurus lepturus (perciformes: trichiuridae), naturally infested of coastal zone of rio de janeiro, brazil]. | neobenedenia melleni (maccallum, 1927) is a widely spread pathogen in teleost maricultures with a very low host specificity. between july of 2006 to june of 2007, 120 specimens of trichiurus lepturus linnaeus, 1758 were acquired of local fishermen in the guanabara bay (22 degrees 57' s and 42 degrees 41' w), state of rio de janeiro, brazil, to the study of the parasite fauna. the surface of the host body was scraped and the monogeneans obtained were identified as n. melleni, which showed prevale ... | 2009 | 20040197 |
| simultaneous detection and prevalence of allergens in anisakis species isolated from marine fishes. | this study was conducted to develop a multiplex reverse transcription (rt) pcr for the detection of anisakis allergens and to investigate the relationship between allergen profiles and anisakid larvae isolated from scomber japonicus, trichiurus lepturus, and conger myriaster in korea. the species of anisakis was determined using anisakis pegreffii-specific pcr and restriction fragment length polymorphism analysis. the prevalence and profiles of five ani s allergens were examined by multiplex rtp ... | 2016 | 27296426 |
| morphological and molecular diagnosis of anisakid nematode larvae from cutlassfish (trichiurus lepturus) off the coast of rio de janeiro, brazil. | anisakid nematode larvae from trichiurus lepturus off coast of rio de janeiro were studied using light, laser confocal and scanning electron microscopy, in addition to a molecular approach. mitochondrial cytochrome c-oxidase subunit 2 (mtdna cox-2), partial 28s (lsu) and internal transcribed spacers (its-1, 5.8s, its-2) of ribosomal dna were amplified using the polymerase chain reaction and sequenced to evaluate the phylogenetic relationships between the nematode taxa. the morphological and gene ... | 2012 | 22792329 |
| molecular studies on larvae of pseudoterranova parasite of trichiurus lepturus linnaeus, 1758 and pomatomus saltatrix (linnaeus, 1766) off brazilian waters. | pseudoterranova larvae parasitizing cutlassfish trichiurus lepturus and bluefish pomatomus saltatrix from southwest atlantic coast of brazil were studied in this work by morphological, ultrastructural and molecular approaches. the genetic analysis were performed for the its2 intergenic region specific for pseudoterranova decipiens, the partial 28s (lsu) of ribosomal dna and the mtdna cox-1 region. we obtained results for the 28s region and mtdna cox-1 that was amplified using the polymerase chai ... | 2015 | 26408586 |
| arsenic and mercury in commercially valuable fish species from the persian gulf: influence of season and habitat. | this study was undertaken to determine the concentrations of arsenic and mercury in edible muscle of pelagic (scomberomorus commerson, chirocentrus dorab, sphyraena jello, rachycentron conadum, thunus tonggol), benthopelagic (trichiurus lepturus, caranx sem, pampus argenteus, parastromateus niger) and demersal (nemipterus japonicas, epinephelus coioides, platycephalus indicus, psettodes erumei, pomadasys argenteus, acanthopagrus latus) fish species from the persian gulf during summer and winter. ... | 2010 | 20667462 |
| ultrastructural characters of the spermatozoa in digeneans of the genus lecithochirium lühe, 1901 (digenea, hemiuridae), parasites of fishes: comparative study of l. microstomum and l. musculus. | this study provides the first ultrastructural data of spermatozoa in the genus lecithochirium. the spermatozoa of l. microstomum (from trichiurus lepturus in senegal) and l. musculus (from anguilla anguilla in corsica) exhibit the general pattern described in the great majority of the digenea, namely two axonemes with the 9 + "1" pattern typical of the trepaxonemata, one mitochondrion, a nucleus, parallel cortical microtubules and external ornamentation of the plasma membrane. spermatozoa of l. ... | 2014 | 25275216 |
| how marine debris ingestion differs among megafauna species in a tropical coastal area. | the marine debris ingested by megafauna species (trichiurus lepturus, chelonia mydas, pontoporia blainvillei, and sotalia guianensis) was recorded in a coastal area of southeastern brazil (21-23°s). marine debris was recorded in all species, mainly consisting of plastic material (flexible and hard plastics - clear, white, and colored- and nylon filaments). the 'pelagic predators' t. lepturus and s. guianesis showed the lowest percent frequencies of debris ingestion (0.7% and 1.3%, respectively), ... | 2014 | 25256299 |
| five new species of philometrid nematodes (philometridae) from marine fishes off java, indonesia. | based on light and scanning electron microscopical studies, the following five species of the philometridae (nematoda: dracunculoidea) are described from female specimens collected from marine fishes off the southwestern coast of java, indonesia: philometra lobotidis sp. n. from the abdominal cavity of the atlantic tripletail lobotes surinamensis (bloch) (lobotidae, perciformes); philometra javaensis sp. n. from the abdominal cavity of the immaculate puffer arothron immaculatus (bloch et schneid ... | 2012 | 22779112 |
| seasonal variation in metazoan parasites of trichiurus lepturus (perciformes: trichiuridae) of rio de janeiro, brazil. | this work aimed to study the temporal variation of metazoan parasites of trichiurus lepturus from the coastal zone of rio de janeiro, brazil. between july 2006 and june 2007, there were four seasonal quarterly samples of 30 specimens of t. lepturus. in addition to a group composed of anisakid larvae, we collected a total of 14 species of metazoan parasites: five digenean; five monogenean, two cestode larvae, one acanthocephalan larvae; and one copepod. with the exception of lecithochirium micros ... | 2011 | 21881803 |
| the parasitic nematodes hysterothylacium sp. type mb larvae as bioindicators of lead and cadmium: a comparative study of parasite and host tissues. | cadmium and lead concentrations were compared in tissues of cutlassfish, trichiurus lepturus l., its intestinal nematode hysterothylacium sp. type mb larvae, and in water from the same location in the sea of oman. metal accumulation in hosts, parasites and sea water was measured by icp-oes. hysterothylacium larvae from the intestinal lumen and visceral cavity showed much higher metal concentrations than in host tissues or sea water. statistical analyses revealed no significant differences in met ... | 2011 | 21816122 |
| molecular identification of hairtail species (pisces: trichiuridae) based on pcr-rflp analysis of the mitochondrial 16s rrna gene. | a rapid pcr-rflp analysis was designed to identify 3 closely related species of hairtails: trichiurus lepturus, t. japonicus, and trichiurus sp. 2, basing on partial sequence data (600 bp) of the mitochondrial dna encoding the 16s ribosomal rna (16s rrna) gene. restriction digestion analysis of the unpurified pcr products of these 3 species, using ecori and vspi endonucleases, generated reproducible species-specific restriction patterns showing 2 fragments (250 bp and 350 bp) for t. lepturus in ... | 2005 | 16278511 |