Population Dynamics of the Marine Clam, Mya arenaria 1
نویسندگان
چکیده
منابع مشابه
The Double Innervation of Muscles in the Clam {mya Arenaria)
IT is a matter of common observation that lamellibranch molluscs may close the valves of their shell by a fairly rapid twitch-like contraction of the adductor muscles, and may thereafter in certain circumstances relax the adductors, immediately allowing the valves to gape, while in other circumstances these muscles may be maintained for a considerable time in the shortened state even when large...
متن کاملZoosporulation of a new Perkinsus species isolated from the gills of the softshell clam Mya arenaria.
A gill-associated Perkinsus sp. isolated from the softshell clam (Mya arenaria) is described as a new species, P. chesapeaki sp. nov. Examination of the parasite in seawater cultures revealed life cycle stages and zoosporulation processes similar to those described for other species of the genus Perkinsus. Prezoosporangia developed thickened cell walls upon contraction of the cytoplasm and deve...
متن کاملBioaccumulation and depuration of enteroviruses by the soft-shelled clam, Mya arenaria.
Low levels of feces-associated natural virus, simulating virus numbers estimated to exist in moderately polluted shellfish-growing waters, were used to evaluate the effectiveness of depuration as a virus depletion procedure in soft-shell clams. Depuration effectiveness depended upon the numbers of virus bioaccumulated and whether virus was solids associated. Virus uptake was greatest when virus...
متن کاملReverse transcriptase activity associated with haemic neoplasia in the soft-shell clam Mya arenaria.
Reverse transcriptase (RT) activity has been reported in bivalves affected by haemic neoplasia (HN). Since all retroviruses have RT, detection of RT activity was regarded as evidence for the retroviral etiology of HN. This study investigates the relationship between RT levels and the progress of HN as indicated by percentages of tetraploid cells in soft-shell clams Mya arenaria. The percentages...
متن کاملChronic Natural Occurrence of Disseminated Neoplasia in Select Populations of the Soft-shell Clam, Mya arenaria, in New England
Disseminated neoplasia, a diffuse tumor of the hemic system, is characterized in many bivalve mollusks by hemolymph containing 1–100% mitotic hemocytes. Little is known about the onset and chronic distribution of neoplasia in populations of Mya arenaria (Soft-shell Clam), though studies have reported episodic exposure to environmental contaminants or an infectious agent as a potential cause of ...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 1956
ISSN: 0024-3590
DOI: 10.4319/lo.1956.1.1.0026