A two-year field study was made of a population of the California
Sea Mussel, Mytilus californianus, located on a protected tidal bench
at Yaquina Head on the Central Oregon Coast. This animal was
chosen because it is attached to the rocks, filters particulate matter
from the water, produces large amounts...
Oögenesis in the sea urchin Strongylocentrotus purpuratus
was studied by histological methods and by histochemical techniques
for polysaccharides, lipids, and nucleic acids Urchins were
collected at Yaquina Head, Oregon at regular intervals between
April 1966 and March 1967. An attempt was made to correlate
seasonal variations in the coastal water...
Oogenesis in the sea urchin Strongylocentrotus purpuratus was
studied at the fine structural level, with special emphasis on the relationship
between the two main cell types within the ovary: the egg cells
and the nutritive phagocytes, or accessory cells. The nutritive
phagocytes are flagellated cells with extensive pseudopods which store...
Effects of phorbol myristate acetate (PMA), dibutyryl cyclic
AMP (dbcAMP), 6-dimethylaminopurine (6-DMAP), okadaic acid
(OA), cycloheximide (CHX), actinomycin D (AcD) and tunicamycin
(TuM) on plasminogen activator (PA) activity and maturation rate
in bovine and porcine oocyte-cumulus cell complexes (BOCC and
POCC, respectively) in vitro were determined. Plasminogen
activator activity was...