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Full-Text Articles in Life Sciences
Discocilia And Paddle Cilia In The Larvae Of Mulinia Lateralis And Spisula Solidissima (Mollusca: Bivalvia), Bernardita Campos, Roger L. Mann
Discocilia And Paddle Cilia In The Larvae Of Mulinia Lateralis And Spisula Solidissima (Mollusca: Bivalvia), Bernardita Campos, Roger L. Mann
VIMS Articles
The bivalve larval velum contains four bands of cilia: inner and outer preoral bands, an adoral band, and a postoral band. The preoral bands of compound cilia are generally considered to be used for both locomotion and food gathering. The adoral and postoral bands function in concert with the preoral bands in food gathering and transfer of food to the mouth. Cilia are usually described as cylindrical structures which taper to a blunt tip. Modified cilia with disc-shaped (discocilia) or pad dle-shaped ends have been recorded in several invertebrate species. Here, for the first time, we demonstrate the presence of …
Distribution Of Bivalve Larvae At A Frontal System In The James River, Virginia, Roger L. Mann
Distribution Of Bivalve Larvae At A Frontal System In The James River, Virginia, Roger L. Mann
VIMS Articles
James River is the southernmost of the major subestuaries of the Chesapeake Bay, USA. A frontal system develops on the early flood tide in the Hampton Roads region of the lower James. This system, together with a cyclonic gyre in Hampton Roads, is in part responsible for partial retention of downstream-flowing water in the estuary and it's injection into deeper, upstream-flowing water. The role of the frontal system in retention of bivalve larvae in the James was investigated In a 2-part study: a field exammation of larval distr~bution versus depth along a transect across the front in relation to salinity …
Seasonal Abundance Of Oyster Spat And Four Animal Associates On An Oyster Reef In The James River, Virginia, Reinaldo Morales-Alamo, Carrollyn Cox, Kevin J. Mccarthy, Roger L. Mann
Seasonal Abundance Of Oyster Spat And Four Animal Associates On An Oyster Reef In The James River, Virginia, Reinaldo Morales-Alamo, Carrollyn Cox, Kevin J. Mccarthy, Roger L. Mann
VIMS Articles
Five species of invertebrates collected at bi-weekly to monthly intervals from an oyster reef in the James River, Virginia. between September 1984 and August 1985 exhibited similar patterns of fluctuation in abundance throughout most of the period. The species were: spat of the oyster Crassostrea virginica: two species that feed on oysters. the flatworm Stylochus ellipticus, and the gastropod Boonea impressa. as well as two others with no known direct trophic interactions with the oyster. the isopod Cassidinidea lunifrons and the nudibranch Doridella obscura. B. impressa was many times more abundant than S. ellipticus but because of the difference in …
Rehabilitation Of The Troubled Oyster Industry Of The Lower Chesapeake Bay, William J. Hargis Jr., Dexter S. Haven
Rehabilitation Of The Troubled Oyster Industry Of The Lower Chesapeake Bay, William J. Hargis Jr., Dexter S. Haven
VIMS Articles
After 1885 Virginia's lower Chesapeake Bay system produced more oysters per year than any other area in the United States and remained predominant until 1960. Since then she has surrendered supremacy as annual harvests of her troubled oyster industry have steadily declined. Numerous factors were responsible for the tremendous productivity of the lower Bay's oyster beds; a number have been involved in its decline. Natural events, such as the catastrophic epizootics of the early 1960's, continuing disease and predation, increased salinities of drought years and great freshets of tropical storms have contributed significantly to the reduction. Pollution and other man-related …
Nearshore Ichthyoplankton Associated With Seagrass Beds In The Lower Chesapeake Bay, Je Olney, Gw Boehlert
Nearshore Ichthyoplankton Associated With Seagrass Beds In The Lower Chesapeake Bay, Je Olney, Gw Boehlert
VIMS Articles
Estuaries serve as important nursery habitats for larvae and juveniles of many species of fishes and invertebrates. Within the estuary, however, partitioning may occur among main channel. mud flat, tidal creek, and vegetated habitats. In this study we describe the egg, larval, and juvenile fish assemblages in shallow areas of submerged aquatic vegetation (SAV) of the lower Chesapeake Bay and compare them with those over the adjacent, shallow sand habitat. Densities at night over all habitats were about 1 order of magnitude higher than daytime densities, and were highest in summer. The SAV habitats were not important spawning sites for …
Field Studies Of Bivalve Larvae And Their Recruitment To The Benthos: A Commentary, Roger L. Mann
Field Studies Of Bivalve Larvae And Their Recruitment To The Benthos: A Commentary, Roger L. Mann
VIMS Articles
A list of factors influencing the recruitment of bivalve larvae might include, but not be limited to, the following: egg quality, physical environment, food availability, loss to predation and disease during larval development, interplay of passive dispersal (horizontally) by water currents and depth regulation by active swimming, proximity of suitable and available substratum as metamorphic competency is achieved, and availability of sufficient metabolic reserves to complete metamorphosis to the benthic form. While tractable methods exist to quantify aspects of certain members of the above list, the focus of such work has usually been biased towards laboratory experiments or hatchery production. …
Distribution And Abundance Of The Bottlenose Dolphin, Tursiops-Truncatus (Montagu, 1821), In Virginia, Robert A. Blaylock
Distribution And Abundance Of The Bottlenose Dolphin, Tursiops-Truncatus (Montagu, 1821), In Virginia, Robert A. Blaylock
VIMS Articles
No abstract provided.
A Limited Information Approach For Determining Capital Stock And Investment In A Fishery, James E. Kirkley, Dale E. Squires
A Limited Information Approach For Determining Capital Stock And Investment In A Fishery, James E. Kirkley, Dale E. Squires
VIMS Articles
No abstract provided.
Synchronous Emergence And Mass Migration In Juvenile Queen Conch, Aw Stoner, Rom Lipcius, Ls Marshall, At Bardales
Synchronous Emergence And Mass Migration In Juvenile Queen Conch, Aw Stoner, Rom Lipcius, Ls Marshall, At Bardales
VIMS Articles
No abstract provided.