Animal Sciences Commons^™

Larval Development Of The Pelecypod Lyonsia Hyalina, P. Chanley, M. Castagna

VIMS Articles

Lyonsia hyalina (Conrad) is a small ( 1/2 to 3/4 inch) odd shaped clarn (Fig·. I) common along the Atlantic Coast from Nova Scotia to South Carolina (Abbott, 1954). It is usually found in sand in shallow water with a coating of small sand grains attached to the periostracurn. (...)

Aspects Of Biodeposition By Oysters And Other Invertebrate Filter Feeders, Dexter S. Haven, Reinaldo Morales-Alamo

VIMS Articles

Quantities of suspended matter removed by oysters (Crassostrea virginica) and deposited as feces or pseudofeces varied seasonally, reaching maxima in September. Below 2.8C, measurable quantities were not produced. At certain seasons, levels of suspended solids influenced quantities of biodeposits. Laboratory studies indicated that the oysters on 0.405 hectare of an estuarine bottom may produce up to 981 kg of feces and pseudofeces weekly. Of the particles, 95% were under 3 µ in diameter. all types of algal cells present in the surrounding water were represented. The deposits contained 77–91% inorganic matter, mostly illite, chlorite, and mixed‐layer clays, 4–12% …

Oyster Mortality Studies In Virginia .V. Epizootiology Of Msx A Protistan Pathogen Of Oysters, Jay D. Andrews

VIMS Articles

MSX, a pathogen of oysters (Crassostrea virginica), produced a drastic epizootic in high-salinity areas of Chesapeake Bay from 1959 to 1963. The patterns of infection and mortality were determined by imports from disease-free seed-oyster areas. Winter and spring imports became infected in early summer and began dying in late summer. Late-summer imports apparently became infected promptly but infections remained subclinical until the following May. Death rates were highest during warm months but losses occurred throughout the year. MSX was assigned as the cause of a high percentage of deaths by sampling live and dead oysters.

Mortality for the first and …

Investigation Of Oyster Larvae And Spat And Certain Important Environmental Factors In An Horizontally Stratified Estuary : Final Report On Project 3-7-R, William J. Hargis Jr.

Reports

Reasonable progress has been made toward attaining the objectives of this project (No. 3-7-R). Considerable additional and new knowledge of the physical structure and dynamics of a theoretically horizontally-stratified estuary and the movement of the larvae and setting (spatfall) of juvenile Crassostrea virginica has been developed. Sedimentary processes, flushing times and the spatial and temporal distribution of the biological entities have also been investigated. Of especial interest have been the design, construction and verification of an hydraulic model of the system and the use of this scientific device to simulate movement of larvae by dye and to make 11time of …

Larvae Of Bivalve Mollusks Of The Sevastopol Region Of The Black Sea, K. A. Zakhvatkina

Reports

No abstract provided.