| discovery of an opportunistic starfish pathogen, orchitophrya stellarum, in captive blue crabs, callinectes sapidus. | histophagous scuticociliate infections were discovered in blue crabs, callinectes sapidus, held in research facilities at the virginia institute of marine science. ciliates were observed infecting every tissue examined including the gills, heart, muscle, hepatopancreas, and epidermis. hemolymph smears and histological tissue sections indicated a morphological similarity to mesanophrys chesapeakensis, the only recorded histophagous ciliate infecting blue crabs. however, subsequent analysis of the ... | 2013 | 23954308 |
| conservation in the first internal transcribed spacer (its1) region of hematodinium perezi (genotype iii) from callinectes sapidus . | hematodinium spp. infections have been reported from blue crabs callinectes sapidus in high-salinity waters of the usa from new jersey to texas. recently, h. perezi (genotype iii) has been proposed as the parasite species and genotype infecting blue crabs from virginia; however, it is unknown whether this same genotype is present in blue crabs from other locations. to address this question, we collected 317 blue crabs from massachusetts, virginia, georgia, florida, louisiana, and texas to test f ... | 2013 | 23482386 |
| diet selectivity of juvenile blue crabs (callinectes sapidus) in chesapeake bay. | shallow coves in chesapeake bay have abundant food and serve as nursery grounds for juvenile blue crabs. in this study, we examined the relationships between the diet of very small (4-40 mm cw) juvenile blue crabs and the benthic infauna in shallow, unvegetated nursery coves. we compared infauna in benthic samples with gut contents of juvenile blue crabs from six shallow coves in each of two sub-estuaries (rappahannock and york rivers) in chesapeake bay, virginia, usa. benthic communities differ ... | 2011 | 21859782 |
| a community-based assessment of seafood consumption along the lower james river, virginia, usa: potential sources of dietary mercury exposure. | the use of community-based participatory research (cbpr) methods to conduct environmental exposure assessments provides valuable insight about disparities in seafood consumption and contaminant exposure. ninety-five community-specific seafood consumption surveys were administered to low-income african-american women (ages 16-49) residing in the southeast community of newport news, va, usa, for the purpose of assessing potential dietary mercury exposure. only the results of the seafood consumptio ... | 2010 | 20129605 |
| a disease of blue crabs (callinectes sapidus) in maryland and virginia. | | 1966 | 5939400 |
| overwintering of the parasitic dinoflagellate hematodinium perezi in dredged blue crabs (callinectes sapidus) from wachapreague creek, virginia. | parasitic dinoflagellates in the genus hematodinium cause disease and mortality in several commercially important marine decapod crustaceans. one species, hematodinium perezi, occurs in blue crabs, callinectes sapidus, along the eastern seaboard and gulf coast of the usa. the parasite infects blue crabs, other decapods, and amphipods in the high salinity waters of coastal bays. epizootics of the parasite often reach prevalence levels of 75-80% during outbreaks with diseased crabs dying from the ... | 2015 | 26232044 |
| the role of alternate hosts in the ecology and life history of hematodinium sp., a parasitic dinoflagellate of the blue crab (callinectes sapidus). | abstract abstract: hematodinium sp. infections are relatively common in some american blue crab (callinectes sapidus) populations in estuaries of the western atlantic ocean. outbreaks of disease caused by hematodinium sp. can be extensive and can cause substantial mortalities in blue crab populations in high salinities. we examined several species of crustaceans to determine if the same species of hematodinium that infects c. sapidus is found in other crustaceans from the same localities. over a ... | 2011 | 21812642 |
| derelict fishing gear in chesapeake bay, virginia: spatial patterns and implications for marine fauna. | derelict fishing gear is a source of mortality for target and non-target marine species. a program employing commercial watermen to remove marine debris provided a novel opportunity to collect extensive spatially-explicit information for four consecutive winters (2008-2012) on the type, distribution, and abundance of derelict fishing gear and bycatch in virginia waters of chesapeake bay. the most abundant form of derelict gear recovered was blue crab pots with almost 32,000 recovered. derelict p ... | 2014 | 24507451 |
| exposure to the cyanotoxin microcystin arising from interspecific differences in feeding habits among fish and shellfish in the james river estuary, virginia. | the cyanotoxin, microcystin (mc), is known to accumulate in the tissues of diverse aquatic biota although factors influencing exposure, such as feeding habits and seasonal patterns in toxin production, are poorly known. we analyzed seasonal variation in the mc content of primary and secondary consumers, and used dietary analysis (gut contents and stable isotopes) to improve understanding of cyanotoxin transport in food webs. periods of elevated toxin concentration were associated with peaks in t ... | 2014 | 24694322 |