Polyploidy in the Manila clam,Ruditapes philippinarum. II. Chemical induction of tetraploid embryos
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15 صفحه اولDispersal, recurrence and settlement of Manila clam, Ruditapes philippinarum
The majority of the marine benthos is pelagic in their larval stage. The Manila clam Ruditapes philippinarum, is widely distributed on sandy tidal flats across Japan and a commercially important shellfish. The clam has a planktonic larval stage, which lasts 2 to 3 weeks after hatching. In this stage, the most clam larvae are able to disperse over wide areas with the currents and then settle on ...
متن کاملEcophysiology of Brown Ring Disease in the Manila clam Ruditapes philippinarum, experimental and modelling approaches
Brown Ring Disease (BRD) in the Manila clam, Ruditapes philippinarum, is a disease caused by the bacterium Vibrio tapetis. This pathology was first observed in Northern Brittany (France) in 1987. The pathogenic agent enters in the extrapallial cavity (i.e. the space between mantle and shell), disrupts the normal production of periostracal lamina and causes an anomalous deposition of periostracu...
متن کاملEffects of hydrocarbon-protein conjugates on frog embryos. II. Induction and persistence of polyploidy in tail epithelium.
For many years observers have recognized that the sizes of cells and nuclei in tumors are more varied than in corresponding normal tissues (18) and tend to be grouped at multiples of the diploid mode (12). While high chromosome counts in tu mor cells (25) were at first thought to be aberrant, Winge (see 23) and Lewis and Lockwood (26) sug gested that the persistent malignant cells of some pknt ...
متن کاملVirus-like particles associated with mortalities of the Manila clam Ruditapes philippinarum in England.
Mortalities of the Manila clam Ruditapes philippinarum (Adams & Reeve, 1850) were reported in southern England (Kent and Poole Harbour) during late spring of 2008. In response to these reported mortalities, samples were collected from 5 sites across the south coast of England. Clams were sampled for both histology and electron microscopy. Transmission electron microscopy (TEM) revealed unenvelo...
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ژورنال
عنوان ژورنال: Aquatic Living Resources
سال: 1990
ISSN: 0990-7440
DOI: 10.1051/alr:1990010