study of the clam, Rangia cuneata, in Lake Pontchartrain and Lake Maurepas, Louisiana

Study of the clam, Rangia cuneata, in Lake Pontchartrain and Lake Maurepas, Louisiana by Johnnie W. Tarver Download PDF EPUB FB2

Get this from a library. A study of the clam, Rangia cuneata, in Lake Pontchartrain and Lake Maurepas, Louisiana. [Johnnie W Tarver; Ronald J Dugas] In Lake Maurepas, rangia clam beds held clams per square yard of bottom. The minimum number estimated to be alive at any time in the area between the Atchafalaya River and Sabine Lake is 24 to Rangia cuneata is a relatively large clam found in the oligohaline areas of Atlantic and Gulf of Mexico estuaries.

Rangia is common in Lake Pontchartrain, Louisiana, and accumulated shells   The purpose of this report is to summarize data obtained in a study of Rangia clams and other invertebrates in Lake Borgne, Louisiana (Poirrier et al.

The Lake Pontchartrain Basin Foundation provided funding and field and technical assistance for this study. The Mississippi River Gulf Outlet (MRGO) began operation in The clam, Rangia cuneata, occurs in low salinity zones of Atlantic and Gulf of Mexico estuaries.

Prior toit was abundant in Lake Pontchartrain, a large and shallow oligohaline estuary Get this from a library. Occurrence, distribution, and density of Rangia cuneata in Lakes Pontchartrain and Maurepas, Louisiana.

[Johnnie W Tarver] Abstract. Polychlorinated dibenzo-para-dioxins (PCDDs) and dibenzofurans (PCDFs) were measured in the tissues of the estuarine clamRangia cuneata at four sites in the Neches River that had been subjected to paper mill effluent and at two remote sites.

One of the river samplings was taken before dioxin control measures and another 2 yr after the control measures :// Effects of urban runoff on the environmental quality of Lake Pontchartrain, Louisiana.

Sub-project: Effects of New Orleans urban runoff on the distribution and structure of submerged aquatic vegetation communities in Lake Pontchartrain, Louisiana: Urban Waste Management and Research Center, University of New Orleans, No.

92, p. :// North American brackish water bivalve Rangia cuneata (G.B. Sowerby I, ) was recorded for the first time in the Vistula Lagoon of the Baltic Sea in September On the basis of features of its biology, we assume that the invasion of this species into the Vistula Lagoon took place at least 2–3 years earlier, in – In –, R.

cuneata colonized and inhabited a large area Rangia cuneata clam decline in Lake Pontchartrain from to due to an El Niño Southern Oscillation shift coupled with a period of high hurricane intensity and frequency Gulf and Caribbean Lake Pontchartrain is a large, water-quality impaired estuary located north of New Orleans, Louisiana, USA with an average depth of m and an average salinity of ppt.

Rangia cuneata clams PDF | OnJan Warzocha and others published The alien gulf wedge clam (Rangia cuneata G. Sowerby I, ) (Mollusca: Bivalia: Mactridae) in the Polish part of the Vistula Lagoon (://   Important flavor components in Louisiana brackish water clam (Rangia cuneata) were investigated in this dissertation research.

Major achievements include: (l) positive identification of the major compound responsible for the objectionable musty/earthy off-flavor in the clam, (2) development of quantitative method to compare ?article=&context=gradschool_disstheses.

We investigated the abundance, distribution, and virulence gene content of Vibrio cholerae, V. parahaemolyticus, and V. vulnificus in the waters of southern Lake Pontchartrain in Louisiana on four occasions from October to Septemberusing selective cultivation and molecular assays.

The three targeted pathogenic vibrios were generally below the detection level in Januarywhen A population of Rangia cuneata (G.B. Sowerby I, ), an estuarine bivalve, has been recorded in the harbour of Antwerp, Belgium. This species is new to the European brackish water :// The estuaries of coastal Louisiana overwinter a continentally significant proportion of Lesser Scaup (Aythya affinis; colloquially, “bluebills”), a migratory bird species of conservation concern since population declines began in the ‐eight years of aerial waterfowl surveys of Lake Pontchartrain—an oligohaline estuarine lagoon in southeast Louisiana—show that scaup Tarver, J.W.

and Dugas, R.J.,A study of the clam, Rangia cuneata, in Lake Pontchartrain and Lake Maurepas, Louisiana Wild Life and Fisheries Commission; Oyster, Water Bottoms and Seafoods Division, Technical Bulletin 5, 97 p. USEPA,Unpublished data of the U.S.

Environmental Protection Agency, Region 6, transferred to spreadsheet Tarver, J.W., and Savoie, L.B.,An inventory and study of the Lake Pontchartrain-Lake Maurepas estuarine complex: Louisiana Wild Life and Fisheries Commission; Oyster, Water Bottoms and Seafoods Division, Technical Bulle :// INTRODUCTION.

Lake Pontchartrain is a large, shallow, low-salinity estuary located north of New Orleans, Louisiana. It has a mean salinity of ppt (Francis et al., ), a surface area of km 2, and a mean depth of m (Sikora and Kjerfve, ).Higher-salinity waters enter from the east through natural tidal passes and through the Inner Harbor Navigation :// The clam Rangia cuneata, originating from the Gulf of Mexico, was recorded in the Vistula Lagoon for the first time in the early s, and quickly became the dominant component of the zoobenthic biomass.

To assess mortality as a factor potentially controlling the growth of Rangia population, a year-long field experiment involving marked bivalves placed in sediment-filled trays deployed on the. Beginning in the early ’s, concerns about the impact of shell dredging in Lake Pontchartrain on water quality restricted access to Rangia clam shells, once a common form of cultch.

Inthe Louisiana Legislature codified this ban and forbade shell dredging in all state-owned water bottoms (Louisiana ?p=Our study of R. cuneata restoration through closure of the MRGO found that clam restoration would have widespread positive contributions to the holistic rehabilitation of Lake Pontchartrain (Spalding, Walker, and Poirrier, ).

In addition to direct benefits of reduction of phytoplankton blooms, turbidity, and fecal coliforms by increased   General Description of Lake Pontchartrain Lake Pontchartrain is a shallow (mean depth 3 m, maximum 5 m) body of water of about km2 lying in the middle of a large, southeastern Louisiana estuarine complex (Figure 1).

To the west is Lake Maurepas, connected to Pontchartrain by Pass Manchac; to the east, Pontchartrain