| differential expression of serine protease inhibitors 1 and 2 in crassostrea corteziensis and c. virginica infected with perkinsus marinus. | proliferation of perkinsus marinus (dermo) in vitro is inhibited by the action of 2 serine protease inhibitors belonging to the i-84 family. we compared the levels of expression of serine protease inhibitors 1 and 2 (spi-1 and spi-2) in 2 oyster species (crassostrea virginica and c. corteziensis) inoculated with the parasite p. marinus. c. virginica is well known to be susceptible to this parasite, whereas c. corteziensis is apparently more tolerant. oysters were inoculated with trophozoites (1 ... | 2015 | 25590769 |
| epizootiology of perkinsus marinus, parasite of the pleasure oyster crassostrea corteziensis, in the pacific coast of mexico. | the protozoan parasite perkinsus marinus is the etiological agent of "dermo disease". this pathogen is considered by the world organization for animal health (oie) as reportable due to the high mortalities that it produces in the eastern oyster crassostrea virginica in the us. in 2006, this parasite was detected in the pleasure oyster crassostrea corteziensis in nayarit on the pacific coast of mexico, indicating a new host and an extension of its known distribution. epizootiological data of p. m ... | 2016 | 27403560 |
| molecular analysis of bacterial microbiota associated with oysters (crassostrea gigas and crassostrea corteziensis) in different growth phases at two cultivation sites. | microbiota presumably plays an essential role in inhibiting pathogen colonization and in the maintenance of health in oysters, but limited data exist concerning their different growth phases and conditions. we analyzed the bacterial microbiota composition of two commercial oysters: crassostrea gigas and crassostrea corteziensis. differences in microbiota were assayed in three growth phases: post-larvae at the hatchery, juvenile, and adult at two grow-out cultivation sites. variations in the micr ... | 2012 | 22450510 |
| [effect of probiotic bacteria on survival and growth of cortez oyster larvae, crassostrea corteziensis (bivalvia: ostreidae)]. | disease control problems have major constraints in aquaculture production, and the use of probiotics in larviculture is a valid alternative to antibiotics. this study analyzed the effect of probiotic bacteria on survival and final size of cortez oyster larvae crassostrea corteziensis. two different probiotic concentrations were evaluated, 1 x 10(4) and 1 x 10(5) cfu/ml of lactic acid bacteria (strain ns61) isolated from nodipecten subnodosus, and bacilli isolated from the white leg shrimp, litop ... | 2011 | 21516645 |
| parasites of the pleasure oyster crassostrea corteziensis cultured in nayarit, mexico. | the pleasure oyster crassostrea corteziensis is collected and cultured in nayarit on the pacific coast of mexico, and the improvement and promotion of its culture are seen as a possible source for the economic development of coastal populations. however, information about the parasite fauna of the pleasure oyster is almost completely lacking. a histopathological survey carried out in two estuaries, boca del camichín and pozo chino, revealed the presence of hypertrophied gametes, rickettsiales-li ... | 2010 | 21192543 |
| acetylcholinesterase and metallothionein in oysters (crassostrea corteziensis) from a subtropical mexican pacific estuary. | substantial efforts have been devoted to developing and applying biomarkers for ecological risk assessment. bivalve mollusks, such as mussels and oysters, are commonly used in environmental monitoring programs because of their wide geographical distribution, great sensitivity to environmental pollutants, and ability to accumulate anthropogenically derived chemicals at a high rate. acetylcholinesterase (ache) activity and metallothionein (mt's) content are representative specific biomarkers that ... | 2010 | 20091118 |
| cadmium, copper, lead and zinc contents of the mangrove oyster, crassostrea corteziensis, of seven coastal lagoons of nw mexico. | the ranges of concentrations of cd, cu, pb and zn of the soft tissues of c. corteziensis collected in seven coastal lagoons of nw mexico were 1.55-7.45, 17.50-166.36, 4.13-9.49 and 245.34-2,304.12 microg/g (dry weight), respectively. their distributions were not consistent and there were no seasonal trends, indicating different point sources of the metals in each lagoon. the mean cd and pb concentrations were 5.34 and 6.30 microg/g (dry weight), which are higher than the values indicative of pol ... | 2009 | 19629367 |
| perkinsus marinus in pleasure oyster crassostrea corteziensis from nayarit, pacific coast of méxico. | culture of the pleasure oyster crassostrea corteziensis is emerging as an alternative to the pacific oyster (crassostrea gigas) for oyster producers, who face severe mortalities since 1997 in northwest méxico. for determining the health status of this species, we conducted a histopathological analysis of cultured populations from two estuaries in the pacific coast of méxico. macroscopical analysis revealed animals with transparent and retracted mantle. histopathological analysis of these specime ... | 2008 | 18423484 |
| the metal content of bivalve molluscs of a coastal lagoon of nw mexico. | the lagoonal system altata-ensenada del pabellón supports important traditional fisheries and mollusc cultures and receives urban and agricultural effluents. the annual mean cd contents of the oyster and mussel crassostrea gigas and mytella strigata of the inner mangrove swamps were higher than that of the clam megapitaria squalida, which lives in areas under marine influence. crassostrea corteziensis had the highest cu and zn contents, showing that it is a strong accumulator of both metals and ... | 2008 | 18058043 |
| heavy metals in the oyster crassostrea corteziensis from urias lagoon, mazatlán, mexico, associated with different anthropogenic discharges. | | 2005 | 16097337 |
| trace metals in tropical coastal lagoon bivalves, crassostrea corteziensis. | | 1990 | 2279116 |
| polymorphism at the its and nts loci of perkinsus marinus isolated from cultivated oyster crassostrea corteziensis in nayarit, mexico and phylogentic relationship to p. marinus along the atlantic coast. | prevalence of the protozoan perkinsus spp. in the gills of the pleasure oyster crassostrea corteziensis from two estuaries in nayarit, mexico, was measured. the protozoan was identified by pcr amplification of the internal transcribed spacer (its) region of the rdna of perkinsus spp. the pathogen was found in 92% of oysters from boca de camichín and 77% of oysters from pozo chino. its sequences characterized from c. corteziensis showed 96-100% similarity to perkinsus marinus. the most frequent i ... | 2015 | 23607743 |
| natural and cultured populations of the mangrove oyster saccostrea palmula from sinaloa, mexico, infected by perkinsus marinus. | the mangrove oyster saccostrea palmula coexists with the pleasure oyster crassostrea corteziensis in coastal lagoons of northwest mexico. recent discovery of perkinsus marinus infecting the pleasure oyster in the region prompted evaluation of s. palmula as an alternative p. marinus host. an analysis to determine the possible presence of p. marinus in natural and cultured populations of s. palmula at four coastal lagoons in sinaloa, mexico was carried out during october-november 2010. tissues fro ... | 2012 | 22465628 |
| vibrio mexicanus sp. nov., isolated from a cultured oyster crassostrea corteziensis. | a bacterial strain was taxonomically characterised by means of a genomic approach comprising 16s rrna gene sequence analysis, multilocus sequence analysis (mlsa), the dna g+c content, whole genome analyses (ani and ggdc) and phenotypic characterisation. the strain caim 1540(t) was isolated from a cultured oyster crassostrea corteziensis in la cruz, sinaloa state, méxico. the isolate was found to be catalase and oxidase positive, cells were observed to be motile, o/129-sensitive and facultatively ... | 2015 | 26021481 |
| comparative bioaccumulation of trace metals using six filter feeder organisms in a coastal lagoon ecosystem (of the central-east gulf of california). | the tobari lagoon, located in the central-east coast of the gulf of california, receives effluents from the yaqui valley, one of the most extensive agricultural areas of méxico. the tobari lagoon also receives effluents from nearby shrimp farms and untreated municipal sewage. surface sediment samples and six different species of filter feeders (crassostrea corteziensis, crassostrea gigas, chione gnidia, anadara tuberculosa, chione fluctifraga, and fistulobalanus dentivarians) were collected duri ... | 2013 | 22527455 |
| seasonal variations of biochemical, pigment, fatty acid, and sterol compositions in female crassostrea corteziensis oysters in relation to the reproductive cycle. | wild female crassostrea corteziensis oyster (n=245) were analyzed over one year to understand the main ecophysiological events associated to gonad development. different indicators (mainly biochemical) were analyzed to infer: i) utilization and accumulation of energy reserves (e.g. neutral lipids, carbohydrates, proteins; vitellogenin), ii) membrane components provided by the diet as essential nutrients and indicative of cell proliferation (e.g. highly unsaturated fatty acids linked to phospholi ... | 2012 | 22613818 |
| arsenic and arsenic species in cultured oyster (crassostrea gigas and c. corteziensis) from coastal lagoons of the se gulf of california, mexico. | the aim of this study was to evaluate the bioavailability of arsenic (as) through cultured oyster crassostrea gigas and crassostrea corteziensis from four coastal lagoons (se gulf of california). organisms were collected in two seasons (rainy and dry season), and they were analyzed for total arsenic and chemical speciation of this element. the concentrations of as in oyster soft tissue fluctuated between 5.44 and 9.56 μg/g for rainy season and 6.46 and 8.33 μg/g for dry season (dry weight) in c. ... | 2013 | 23129525 |
| biomonitoring of arsenic through mangrove oyster (crassostrea corteziensis hertlein, 1951) from coastal lagoons (se gulf of california): occurrence of arsenobetaine and other arseno-compounds. | in this study, we examined the bioavailability of arsenic through the mangrove oyster crassostrea corteziensis sampled from seven coastal lagoons in se gulf of california during the rainy and dry seasons. as concentrations in soft tissue of oysters c. corteziensis fluctuated between 5.2 and 11.6 μg/g on dry weight; organisms from the control site presented the lowest as concentrations in the two sampling seasons. as speciation was evaluated in selected samples and indicated that arsenobetaine wa ... | 2013 | 23412954 |
| evaluation of pollution in camichin estuary (mexico): pro-oxidant and antioxidant response in oyster (crassostrea corteziensis). | the physiological system of molluscs, particularly pro-oxidant and antioxidant mechanisms, could be altered by pollutants and induce disturbance on health status and productive parameters of aquatic organisms, such as oyster. therefore, the aim of this study was to evaluate the chemical contamination in water (total metals and polycyclic aromatic hydrocarbons) and oxidative stress parameters in oysters (crassostrea corteziensis) in camichin estuary, located in mexican tropical pacific. the resul ... | 2013 | 23500622 |
| changes in the composition and diversity of the bacterial microbiota associated with oysters (crassostrea corteziensis, crassostrea gigas and crassostrea sikamea) during commercial production. | the resident microbiota of three oyster species (crassostrea corteziensis, crassostrea gigas and crassostrea sikamea) was characterised using a high-throughput sequencing approach (pyrosequencing) that was based on the v3-v5 regions of the 16s rrna gene. we analysed the changes in the bacterial community beginning with the postlarvae produced in a hatchery, which were later planted at two grow-out cultivation sites until they reached the adult stage. dna samples from the oysters were amplified, ... | 2014 | 24325323 |
| bioavailability of cadmium, copper, mercury, lead, and zinc in subtropical coastal lagoons from the southeast gulf of california using mangrove oysters (crassostrea corteziensis and crassostrea palmula). | cadmium (cd), copper (cu), mercury (hg), lead (pb), and zinc (zn) were assessed in the edible tissues of crassrotrea corteziensis oysters collected during the rainy and dry seasons in 27 sites from 8 coastal lagoons of the southeast gulf of california. in addition, c. palmula oysters were sampled at 9 sites from the same mangrove roots where c. corteziensis oysters were collected. metal analyses were performed by flame atomic absorption spectrophotometry (cd, cu, and zn), graphite furnace (pb), ... | 2015 | 25556031 |
| assessment of pollution of the boca de camichin estuary in nayarit (mexico) and its influence on oxidative stress in crassostrea corteziensis oysters. | boca de camichin estuary is one of the main producers of crassostrea corteziensis oysters in mexico, but the presence of pollutants can affect oyster production. molluscs produce reactive oxygen species (ros) in response to changes in the environment and pollution. these ros induce oxidative damage in biomolecules. the main objective of this study was to evaluate pollution in the estuary and the subsequent oxidative stress in c. corteziensis oysters during the 2010 production cycle. for this aim ... | 2016 | 27156678 |
| comparative bioavailability of trace metals using three filter-feeder organisms in a subtropical coastal environment (southeast gulf of california). | to evaluate the relative bioavailability of cd, cr, cu, fe, mn, ni, pb and zn in the coastal waters of one selected site in mazatlán harbor, different filter feeder organisms, an oyster (crassostrea corteziensis), a mussel (mytella strigata) and a barnacle (fistulobalanus dentivarians), were sampled during 1 year. seasonal and interspecific variations in some metal concentrations were evident, especially for cd, ni, pb and zn. in contrast with fe, pb and zn, the concentrations of cd varied accor ... | 2000 | 15092989 |
| trace metals accumulation patterns in a mangrove lagoon ecosystem, mazatlan harbor, southeast gulf of california. | water, surface sediments, the mussel mytella strigata, the mangrove oyster crassostrea corteziensis, and the green macroalgae caulerpa sertularioides from four locations in mazatlan harbor on the southeast coast of the gulf of california, were analyzed to determine concentrations and distribution patterns of cadmium, copper, mercury, lead, and zinc. total metal concentrations in water in the present study exceed the background levels in open sea and coastal waters. total metal concentrations in ... | 2008 | 18569313 |
| seasonal variations in the concentrations of metals in crassostrea corteziensis from sonora, méxico. | this study examines seasonal variations in the concentrations of cd, cu, pb, and hg in experimentally cultured crassostrea corteziensis, an oyster species known to have high resistance to physical and chemical stressors. the highest levels of cd (4.92 mg/kg), cu (3.45 mg/kg), and pb (0.67 mg/kg) were detected in oyster samples collected during the summer, while hg concentrations were similar (0.03 to 0.04 mg/kg) throughout all seasons. results indicate that except for cd, crassostrea corteziensi ... | 2010 | 20585753 |