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- VIMS Books and Book Chapters (69)
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Articles 61 - 70 of 70
Full-Text Articles in Life Sciences
The Effects Of Tropical Storm Agnes On Fishes In The James, York, And Rappahannock Rivers Of Virginia, Walter J. Hoagman, Woodrow L. Wilson
The Effects Of Tropical Storm Agnes On Fishes In The James, York, And Rappahannock Rivers Of Virginia, Walter J. Hoagman, Woodrow L. Wilson
VIMS Books and Book Chapters
Intensive trawl surveys during and after Tropical Storm Agnes were mounted on the James, York, and Rappahannock Rivers to measure the effects of the floodwaters on the distribution and abundance of fish. The direct effect of Agnes on the fish populations was minor and temporary. The normal zone was extended downriver. A substantial portion of the lower-river (marine) species was also displaced downstream and into Chesapeake Bay, but had returned by the follow-up surveys. No adult mortalities due to Agnes were detected. Although we know vast quantities of fish larvae and other plankton were swept into Chesapeake Bay, the overall …
Effects Of Tropical Storm Agnes On Zooplankton In The Lower Chesapeake Bay, George C. Grant, Burton B. Bryan, Fred Jacobs, John E. Olney
Effects Of Tropical Storm Agnes On Zooplankton In The Lower Chesapeake Bay, George C. Grant, Burton B. Bryan, Fred Jacobs, John E. Olney
VIMS Books and Book Chapters
Sampling techniques in use since August 1971 were employed to study effects of Tropical Storm Agnes on lower Chesapeake Bay zooplankton following the storm's passage on June 21, 1972. Mean catches of copepods, cladocerans, barnacle larvae, decapod larvae, chaetognaths, and fish eggs and larvae were calculated for the entire study area and six subareas from 8" bongo net collections. A single subarea was selected for specific identifications within major taxa of zooplankton.
Patterns Of Distribution Of Estuarine Organisms And Their Response To A Catastrophic Decrease In Salinity, Peter F. Larsen
Patterns Of Distribution Of Estuarine Organisms And Their Response To A Catastrophic Decrease In Salinity, Peter F. Larsen
VIMS Books and Book Chapters
The occurrence of Tropical Storm Agnes during an ongoing study on the community structure of the macrobenthos associated with the James River oyster reefs provided a unique opportunity to document the responses of this assemblage to such a disturbance. The spatial and temporal patterns of abundance of 18 important taxa are examined in this paper. Eight species exhibited limited up estuary penetration, six were most successful in the upper part of the estuarine segment studied, two were most abundant in the mid-section of the study area, and two were ubiquitous. In the post-Agnes period, .six species exhibited reduced population levels, …
The Effect Of Tropical Storm Agnes On Oysters, Hard Clams, Soft Clams, And Oyster Drills In Virginia, D. S. Haven, W. J. Hargis Jr., J. G. Loesch, J. P. Whitcomb
The Effect Of Tropical Storm Agnes On Oysters, Hard Clams, Soft Clams, And Oyster Drills In Virginia, D. S. Haven, W. J. Hargis Jr., J. G. Loesch, J. P. Whitcomb
VIMS Books and Book Chapters
Tropical Storm Agnes had a major effect on the molluscan fisheries of Virginia. One effect was the direct mortality of oysters, Crassostrea virginiaa, in the upper parts of many estuaries. Typical losses on leased bottoms were: the James River, 10%; the York River, 2%; the Rappahannock River, 50%; and the Potomac River tributaries (Virginia) 70%. Economic loss was in excess of 7.9 million dollars. There was a nearly complete absence of oyster larvae attachment (setting) in 1972. Other effects of Agnes included a nearly complete loss of soft clams, Mya arenaria, in the Rappahannock River. Hard clams, Meraenaria meraenaria, were …
Public Health Aspects Of Tropical Storm Agnes In Virginia's Portion Of Chesapeake Bay And Its Tributaries, M. P. Lynch, J. Claiborne Jones
Public Health Aspects Of Tropical Storm Agnes In Virginia's Portion Of Chesapeake Bay And Its Tributaries, M. P. Lynch, J. Claiborne Jones
VIMS Books and Book Chapters
All Virginia waters within Chesapeake Bay were closed for the taking of shellfish for direct consumption on 23 June 1972. This initial closing was in anticipation of high microorganism levels accompanying flood waters moving downstream. Various areas beginning with the lower portion of Chesapeake Bay were reopened beginning )n 20 July 1972. By 5 October 1972 all areas closed as a result )f Tropical Storm Agnes were reopened. No increased incidents of infectious diseases caused by waterborne microorganisms were noted in Virginia which could be attributed to Tropical Storm Agnes.
The Displacement And Loss Of Larval Fishes From The Rappahannock And James Rivers, Virginia, Following A Major Tropical Storm, Walter J. Hoagman, John V. Merriner
The Displacement And Loss Of Larval Fishes From The Rappahannock And James Rivers, Virginia, Following A Major Tropical Storm, Walter J. Hoagman, John V. Merriner
VIMS Books and Book Chapters
Two days after Tropical Storm Agnes, the Virginia Institute of Marine Science (VIMS) established an anchor station at Mile 15 in the Rappahannock and Mile 10 in the James River. Both stations were in mainstream, manned constantly for 10 days, and took continuous current data from meters placed at 0, 6, 8, and 15 min the Rappahannock and 0, 4, 5, 8, and 14 min the James. Concurrently, 0.85 m diameter plankton nets of No. 1 nylon mesh were hung in the flowing surface water for 10 minutes hourly. A small collection of midwater (4 m) plankton samples was obtained …
Effect Of Tropical Storm Agnes On Setting Of Shipworms At Gloucester Point, Virginia, Marvin L. Wass
Effect Of Tropical Storm Agnes On Setting Of Shipworms At Gloucester Point, Virginia, Marvin L. Wass
VIMS Books and Book Chapters
Surveillance of shipworm infestation at Gloucester Point, Va., began in 1958. Borer attack by Bankia gouldi occurred in July to early October each year until the passage of Agnes greatly reduced setting. Populations returned to near normal in 1975. Salinity was shown to vary with watershed rainfall.
The Effect Of Tropical Storm Agnes On The Benthic Fauna Of Eelgrass, Zostera Marina, In The Lower Chesapeake Bay, Robert J. Orth
The Effect Of Tropical Storm Agnes On The Benthic Fauna Of Eelgrass, Zostera Marina, In The Lower Chesapeake Bay, Robert J. Orth
VIMS Books and Book Chapters
Tropical Storm Agnes caused major changes in the macroinvertebrate assemblages of both epifauna and infauna in eelgrass, Zostera marina, beds. Species abundance and density of infauna declined by one-third to one-half of values found prior to Agnes. Typical members of the infaunal community such as the amphipods, Ampelisca spp. and Lysianassa alba, the polychaetes Sabella microphthalma and Exogone dispar, ostracods and gastropods were either absent or rare following Agnes. Epifaunal density was much higher than that recorded before Agnes but the number of species was reduced. This high density was attributed to several species, e.g. Molgula manhattensis, which appeared to …
Biodeposition As A Factor In Sedimentation Of Fine Suspended Solids In Estuaries, Dexter S. Haven, Reinaldo Morales-Alamo
Biodeposition As A Factor In Sedimentation Of Fine Suspended Solids In Estuaries, Dexter S. Haven, Reinaldo Morales-Alamo
VIMS Books and Book Chapters
Filter feeders, such as mollusks, tunicates, and barnacles, ingest particles as small as 1 micron during their feeding process and void them in fecal pellets which range from 500 to 3,000 microns in length; these pellets settle at a much faster rate than their component particles. Feces and pseudofeces that settle to the bottom are termed biodeposits. Oyster biodeposits contain 77 to 91 percent inorganic matter, 4 to 12 percent organic carbon, and about 1.0 gram per kilogram of phosphorus. Fecal pellets are alternately deposited and resuspended by tidal currents. They settle and accumulate in areas of estuaries where the …
Nutrient Assimilation In A Virginia Tidal System, Morris L. Brehmer
Nutrient Assimilation In A Virginia Tidal System, Morris L. Brehmer
VIMS Books and Book Chapters
Over-enrichment leading to environmental degradation and the production of aquatic nuisance conditions have destroyed the multi-use potential of several coastal tidal systems in the United States. The Middle and South Atlantic and the Gulf Coast drainage basins are especially vulnerable to this type of destruction because of their hydraulic characteristics. Many are drowned pre-Pleistocene river valleys having a large basin capacity relative to the fresh-water inflow. This results in a horizontal-boundary type estuary characterized by higher salinities on the left side (looking downstream) and the absence of a sharp salinity gradient from surface to bottom of the water column . …