| parasite communities in eels of the island of reunion (indian ocean): a lesson in parasite introduction. | eel populations from the small rivers on the island of reunion (french overseas department in the indian ocean) were investigated with respect to the occurrence and abundance of helminths during the autumn of 2005. the native species anguilla marmorata (n = 80), anguilla bicolor (n = 23), and anguilla mossambica (n = 15) were studied. six species of helminths were identified, four of them having a definitely nonnative status. furthermore, unidentified intra-intestinal juvenile cestodes and extra ... | 2008 | 18288491 |
| distribution of trace metals and methylmercury in soft tissues of the freshwater eel anguilla marmorata in vietnam. | this study investigated trace metals in water, sediment, and various organs of the mature eel anguilla marmorata in the ba river, vietnam. the metal concentrations in water and sediment did not exceed the vietnam water criteria and sediment background concentration, except for mn and pb in sediment. the results of metal analysis in eel specimens indicated that the liver and kidney were the dominant organs for almost all trace metals, whereas muscle tended to accumulate high levels of hg and appr ... | 2010 | 20162263 |
| the role of three heat shock protein genes in the immune response to aeromonas hydrophila challenge in marbled eel, anguilla marmorata. | heat shock proteins (hsps) are highly conserved molecular chaperones that play critical roles in both innate and adaptive immunity. however, little information about hsps from marbled eel anguilla marmorata is known. in this study, the full-length amhsp90 (2527 bp), amhsp70 (2443 bp) and amhsc70 (2247 bp) were first cloned from a. marmorata, using rapid amplification of cdna ends, containing open reading frames of 2181, 1932 and 1950 bp in length, and encoding proteins with 726, 643 and 649 amin ... | 2016 | 27853553 |
| protein transduction domain of transactivating transcriptional activator fused to outer membrane protein k of vibrio parahaemolyticus to vaccinate marbled eels (anguilla marmorata) confers protection against mortality caused by v. parahaemolyticus. | although immersion and oral vaccination are the most practical methods for fish farmers, their applications are very limited due to low immune stimulation effect. we used the protein transduction domain (ptd) of transactivating transcriptional factor (tat) derived from hiv tat protein to increase the delivery efficiency of aquatic protein vaccines. vibrio parahaemolyticus outer membrane protein k (ompk), a reported vaccine candidate for the prevention of v. parahaemolyticus infection, was fused ... | 2015 | 25919337 |
| helminths from the giant mottled eel anguilla marmorata quoy & gaimard in japan, with a description of acanthocephalus longiacanthus n. sp. (acanthocephala: echinorhynchidae). | five helminths, including a new echinorhynchid acanthocephalan acanthocephalus longiacanthus n. sp., are described based on specimens from the giant mottled eel anguilla marmorata quoy & gaimard caught in a small river, western japan. the new acanthocephalan is distinguished from the other congeners in terms of hook arrangement (8-9 longitudinal rows with 5-6 hooks per row) on proboscis, maximum length of hook blade (81-95 μm in male, 150-190 μm in female), lemnisci being longer than proboscis r ... | 2014 | 24711116 |
| illegal trade of regulated and protected aquatic species in the philippines detected by dna barcoding. | illegal trade has greatly affected marine fish stocks, decreasing fish populations worldwide. despite having a number of aquatic species being regulated, illegal trade still persists through the transport of dried or processed products and juvenile species trafficking. in this regard, accurate species identification of illegally traded marine fish stocks by dna barcoding is deemed to be a more efficient method in regulating and monitoring trade than by morphological means which is very difficult ... | 2016 | 24841434 |
| diverse migration strategy between freshwater and seawater habitats in the freshwater eel genus anguilla. | the freshwater eels of the genus anguilla, which are catadromous, migrate between freshwater growth habitats and offshore spawning areas. a number of recent studies, however, found examples of the temperate species anguilla anguilla, anguilla rostrata, anguilla japonica, anguilla australis and anguilla dieffenbachii that have never migrated into fresh water, spending their entire life history in the ocean. furthermore, those studies found an intermediate type between marine and freshwater reside ... | 2012 | 22803719 |
| evolution of microsatellite loci of tropical and temperate anguilla eels. | anguilla eels are divided into temperate and tropical eels, based on their major distributions. the present study collected two temperate eels, anguilla japonica and anguilla anguilla, and two tropical eels, anguilla marmorata and anguilla bicolor pacifica, to examine two questions: do temperate and tropical anguilla eels have different genetic polymorphic patterns?; and do temperate anguilla japonica and anguilla anguilla have a closer relationship to each other than to tropical eels? in total, ... | 2012 | 22605978 |
| differential expression of skin mucus c-type lectin in two freshwater eel species, anguilla marmorata and anguilla japonica. | two types of lactose-specific lectins, galectin (ajl-1) and c-type lectin (ajl-2), were previously identified in the mucus of adult anguilla japonica. here, we compared the expression profiles of these two homologous lectins at the adult and juvenile stages between the tropical eel anguilla marmorata and the temperate eel a. japonica. only one lectin, predicted to be an orthologue of ajl-1 by lc-ms/ms, was detected in the mucus of adult a. marmorata. we also found that an orthologous gene to ajl ... | 2016 | 27026508 |
| [fish population structure in the fishway of changzhou hydro-junction]. | the fishway of changzhou hydro-junction, located in the main stream of xijiang river, is the biggest fishway in china up to now. efficiency assessment of the changzhou fishway is important for fish resource and ecosystem protection of the pearl river, and can provide basic data for design, construction and management of other fishways in china. a total of 40 fish species in the changzhou fishway were sampled on 11 occasions from april to june during 2011-2014 by using blocking method. migratory ... | 2015 | 26571676 |
| morphological and physiological changes of female tropical eels, anguilla celebesensis and anguilla marmorata, in relation to downstream migration. | the morphological and physiological characteristics of migrating and non-migrating female tropical eels, anguilla celebesensis and anguilla marmorata were examined in relation to their downstream migration on central sulawesi island, indonesia. migrating eels (64 a. celebesensis and 37 a. marmorata) were obtained from weirs set near the outlet area of poso lake and non-migrating eels (21 a. celebesensis and 21 a. marmorata) were sampled by set-lines and eel pots in poso lake, its inlet rivers, a ... | 2012 | 22803717 |
| sympatric spawning but allopatric distribution of anguilla japonica and anguilla marmorata: temperature- and oceanic current-dependent sieving. | anguilla japonica and anguilla marmorata share overlapping spawning sites, similar drifting routes, and comparable larval durations. however, they exhibit allopatric geographical distributions in east asia. to clarify this ecological discrepancy, glass eels from estuaries in taiwan, the philippines, indonesia, and china were collected monthly, and the survival rate of a. marmorata under varying water salinities and temperatures was examined. the composition ratio of these 2 eel species showed a ... | 2012 | 22675481 |
| sympatric spawning of anguilla marmorata and anguilla japonica in the western north pacific ocean. | extensive collections were made of the larvae of the temperate japanese eel anguilla japonica and the tropical giant mottled eel anguilla marmorata in an overlapping area of the north equatorial current region of the western north pacific ocean. collections of 189 a. marmorata and > 2500 a. japonica larvae during nine surveys from 1991 to 2007 showed that these two anguillid eels have similar spawning areas just west of the southern west mariana ridge. in july to august 2006 and august 2007, mor ... | 2009 | 20735676 |
| na(+)/k(+)-atpase response to salinity change and its correlation with fxyd11 expression in anguilla marmorata. | the na(+)/k(+)-atpase (nka) is a primary electrogenic protein that promotes ion transport in teleosts. fxyd11 is a putative regulatory subunit of the nka pump. the regulation of na (+)/k (+) -atpase and fxyd11 is of critical importance for osmotic homeostasis. to investigate the changes of the two genes under different salinity environments, we first identified nka (amnkaα1) and fxyd11 (amfxyd11) in anguilla marmorata, and then evaluated the mrna levels of nka and fxyd11 as well as the activity ... | 2017 | 28280923 |
| genome sequence of a marbled eel polyoma-like virus in taiwan. | we report here the complete genome sequence of a virus isolated from a diseased marbled eel (anguilla marmorata) in taiwan. the virus has been characterized as being related to japanese eel endothelial cell-infecting virus (jeecv), with a large t-antigen-like protein. the sequence of the marbled eel virus displays low homology to the jeecv. | 2017 | 28183770 |
| effects of salinity change on two superoxide dismutases (sods) in juvenile marbled eel anguilla marmorata. | salinity is one of the most important factors that affect the fish growth and survival. superoxide dismutases (sods), as the primary antioxidant enzymes, play a first role in the process of preventing oxidative stress caused by excessive superoxide anion (o[formula: see text]) in living organisms. in the present study, we investigated the effects of salinity on the gene expressions as well as enzymatic activities of mnsod and cu/znsod in gill, intestine, kidney, liver and muscle tissues of the m ... | 2016 | 27547518 |
| itraq proteomic analysis of salinity acclimation proteins in the gill of tropical marbled eel (anguilla marmorata). | osmoregulation plays an important role in the migration process of catadromous fish. the osmoregulatory mechanisms of tropical marbled eel (anguilla marmorata), a typical catadromous fish, did not gain sufficient attention, especially at the molecular level. in order to enrich the protein database of a. marmorata, a proteomic analysis has been carried out by itraq technique. among 1937 identified proteins in gill of marbled eel, the expression of 1560 proteins (80 %) was quantified. compared wit ... | 2016 | 26721661 |
| isolation of a novel polyomavirus, related to japanese eel endothelial cell-infecting virus, from marbled eels, anguilla marmorata (quoy & gaimard). | marbled eels, anguilla marmorata (quoy & gaimard), cultured in taiwan exhibited haemorrhage and mortality in january 2012. the severely diseased eels bled from the gills and showed congestion of the central venous sinus of the gill filaments and haemorrhage throughout the body similar to viral endothelial cell necrosis of eel. in this study, a novel polyomavirus (ampyv) was isolated from the diseased eels using the ampf cell line established from the pectoral fin of healthy marbled eels. ampyv w ... | 2016 | 26566584 |
| microrna-sequence profiling reveals novel osmoregulatory microrna expression patterns in catadromous eel anguilla marmorata. | micrornas (mirnas) are a class of endogenous small non-coding rnas that regulate gene expression by post-transcriptional repression of mrnas. recently, several mirnas have been confirmed to execute directly or indirectly osmoregulatory functions in fish via translational control. in order to clarify whether mirnas play relevant roles in the osmoregulation of anguilla marmorata, three srna libraries of a. marmorata during adjusting to three various salinities were sequenced by illumina srna deep ... | 2015 | 26301415 |
| molecular cloning, characterization, and expression of vacuolar-type-h⁺-atpase b1 (vhab1) gene in the gill of anguilla marmorata. | we explored the molecular mechanism of the regulation of vacuolar-type-h+-atpase b1 (vhab1) in elvers in the response to salinity. the full-length cdna of vhab1 in anguilla marmorata (designated as amvhab1), which was 1741 base pairs (bp) in length, was found to encompass a 1512-bp open reading frame encoding a polypeptide with 503 amino acids (55.9 kda), an 83-bp 5'-untranslated region, and a 146-bp 3'-untranslated region. the mrna and protein expression levels of amvhab1 in the gill were evalu ... | 2015 | 26214483 |
| expression and activity of v-h+ -atpase in gill and kidney of marbled eel anguilla marmorata in response to salinity challenge. | the full-length complementary (c)dna of vacuolar-type-h(+) -atpase b1 gene (vhab1) in marbled eel anguilla marmorata with 1741 base pairs (bp) was identified. it contained a 1512 bp open reading frame encoding a polypeptide with 503 amino acids (55·9 kda), an 83 bp 5'-untranslated region (utr) and a 146 bp 3'-utr. the expression levels of a. marmorata vhab1 in gill and kidney of a. marmorata were evaluated at different intervals during the exposure to various salinities (0, 10 and 25). the resul ... | 2015 | 26040212 |
| the giant mottled eel, anguilla marmorata, uses blue-shifted rod photoreceptors during upstream migration. | catadromous fishes migrate between ocean and freshwater during particular phases of their life cycle. the dramatic environmental changes shape their physiological features, e.g. visual sensitivity, olfactory ability, and salinity tolerance. anguilla marmorata, a catadromous eel, migrates upstream on dark nights, following the lunar cycle. such behavior may be correlated with ontogenetic changes in sensory systems. therefore, this study was designed to identify changes in spectral sensitivity and ... | 2014 | 25101636 |
| what do the occurrences of migratory fishes in the upper mekong mean? | this paper examines the recent appearance of four migratory species in the upper mekong: dasyatis laosensis, anguilla bicolor, anguilla marmorata, and chitala ornata. since 2006 these species have been continually sampled in an area below jinghong dam in xishuangbanna, china. this region is far beyond their historical upstream distribution, and the reasons for these appearances and their subsequent impact on river ecosystem are considered. | 2013 | 23828312 |
| regional variation in otolith sr:ca ratios of african longfinned eel anguilla mossambica and mottled eel anguilla marmorata: a challenge to the classic tool for reconstructing migratory histories of fishes. | otolith sr:ca ratios of the african longfinned eel anguilla mossambica and giant mottled eel anguilla marmorata from nine freshwater sites in four rivers of south africa were analysed to reconstruct their migratory life histories between freshwater and saltwater habitats. for a. mossambica, the sr:ca ratios in the otolith edge differed significantly among rivers and had large effect sizes, but did not differ among sites within a river. otolith sr:ca ratios did not differ among rivers for a. marm ... | 2012 | 22803718 |
| within-population structure highlighted by differential introgression across semipermeable barriers to gene flow in anguilla marmorata. | in the marine environment, differential gene exchange between partially reproductively isolated taxa can result in introgression that extends over long distances due to high larval dispersal potential. however, the degree to which this process contributes to interlocus variance of genetic differentiation within introgressed populations remains unclear. using a genome-scan approach in the indo-pacific eel anguilla marmorata, we investigated the degree of interpopulation genetic differentiation, t ... | 2011 | 22133215 |
| highly polymorphic microsatellite loci from the giant mottled eel (anguilla marmorata). | eighteen polymorphic microsatellite loci from the giant mottled eel (anguilla marmorata) were identified and their characteristics were described. these markers were tested in two wild populations from china (n = 20) and australia (n = 20) respectively. the number of alleles ranged from 9 to 14 with an average of 11.28 per locus. the mean expected heterozygosity (h(e) ) was 0.8696 in the population from china, 0.8823 in the population from australia. no locus deviates significantly from hardy-we ... | 2009 | 21564954 |
| development of a key using morphological characters to distinguish south-western indian ocean anguillid glass eels. | two morphological characters were examined in 4099 anguillid glass eels sampled in four south-western indian ocean islands, and resulting identifications were tested using genetic analysis. distance between the origin of the dorsal and anal fins as related to total length and tail and caudal fin pigmentation enabled formulation of a useful field identification key, which was able to discriminate 4036 glass eels of the regional species anguilla bicolor bicolor, anguilla marmorata and anguilla mos ... | 2009 | 20735695 |
| morphological and meristic evaluation of the population structure of anguilla marmorata across its range. | the population structure of the giant mottled eel anguilla marmorata was evaluated using statistical analysis of 21 morphological characters among 13 representative localities across the indo-pacific region and as far north as japan. there were no clear differences in 15 proportional and six vertebral characters using principal component analysis. the total number of vertebrae (n(v)) of a. marmorata at these localities had the widest variation among the morphological and meristic characters exam ... | 2009 | 20735689 |
| molecular characterization of marbled eel (anguilla marmorata) gonadotropin subunits and their mrna expression profiles during artificially induced gonadal development. | three cdna sequences encoding the gonadotropin subunits, common glycoprotein alpha subunit (gthalpha), fshbeta and lhbeta subunits were isolated from marbled eel. the cdna of gthalpha encodes 116 amino acids with a signal peptide of 24 amino acids and a mature peptide of 92 amino acids. the fshbeta subunit consists of 127 amino acids with a 22 amino acid signal peptide and a 105 amino acid mature peptide, while the lhbeta subunit consists of 140 amino acids with a 24 amino acid signal peptide an ... | 2009 | 19327361 |
| seasonality of spawning by tropical anguillid eels around sulawesi island, indonesia. | remarkably little is known about the life histories of the many tropical anguillid eels distributed across the indo-pacific region, and since the danish expedition to study eels in the region in 1928 and 1929, research on these eels has only begun again in recent years. sampling for anguillid leptocephali in the indonesian seas has been carried out recently to learn about the spawning ecology and larval distributions of tropical eels there. the leptocephali of anguilla marmorata, anguilla bicolo ... | 2009 | 18850081 |
| multiple population structure of the giant mottled eel, anguilla marmorata. | the population structure of the giant mottled eel, anguilla marmorata, was investigated with mitochondrial and microsatellite dna analyses using 449 specimens from 13 localities throughout the species range. control region f-statistics indicated the north pacific (japan, taiwan, philippines, sulawesi), south pacific (tahiti, fiji, new caledonia, papua new guinea), eastern indian ocean (sumatra), western indian ocean (réunion, madagascar), ambon, and guam regions were significantly different (phi ... | 2008 | 18522690 |
| a new species of procamallanus (nematoda: camallanidae) from pacific eels (anguilla spp.). | a new species of parasitic nematode, procamallanus (procamallanus) pacificus n. sp., is described from the stomach of the pacific shortfinned eel, anguilla obscura (type host), and from the speckled longfin eel, anguilla reinhardtii, from northern new caledonia (melanesia, south pacific); from anguilla sp. (cf. obscura) from the fiji islands (melanesia, south pacific); and from the giant mottled eel anguilla marmorata from futuna island (wallis and futuna islands, polynesia). although a total of ... | 2006 | 16629326 |
| cucullanus oceaniensis sp. n. (nematoda: cucullanidae) from pacific eels (anguilla spp.). | a new species of parasitic nematode, cucullanus oceaniensis sp. n., is described from the intestine of the giant mottled eel anguilla marmorata (type host) from futuna island (wallis and futuna islands, polynesia) and from a. marmorata and anguilla sp. (cf. obscura) from fiji islands (melanesia, south pacific). the main distinguishing characteristics are the length of spicules (668-1,020 microm), situation of deirids (slightly anterior to the oesophago-intestinal junction) and the excretory pore ... | 2005 | 16405298 |