Gravid females, recognized by the white
ovisacs found on each plant, were counted and recorded every wk for a total of 14 wk.
Although a few unmated females produced
ovisacs, while they neither produced eggs nor gave birth any crawlers in the
ovisacs.
salvator present grouping of oocytes into a structure similar to
ovisacs. This condition appeared to be apomorphic and was associated with the small size of these species (< 10 mm) and their short life cycle.
They laid 310-625 ( X =470.3) creamy white oblong eggs in 3-5 white waxy
ovisacs produced under the abdomen at different time intervals during oviposition period.
The mRNA was prepared from embryos harvested from different periods (the embryos collected from
ovisacs and the activated embryos) and used as a template for cDNA by the same protocol mentioned above.
According to Shalash (1965) and El-Wishy (1988), the presence of numerous
ovisacs on the surface of the camel ovary gave it the appearance of bunch of grapes, while the circular shape of the ovary during pregnancy was subjected to many variations depending on size, position and form of corpus luteum.
- For the tests with Epioblasma spp., mature glochidia were obtained by excising the marsupial gills from gravid female mussels and rupturing the
ovisacs with a probe.
To avoid contaminating the newly emerged crawlers, viable
ovisacs were removed from cuttings.
The dispersion of this insect can occurs locally by crawlers, 0.3 mm long, and
ovisacs, readily transported by wind or animals.
Females were viewed through a Leica MZ8 stereo-microscope and counted, and most of them were dissected from the surrounding bone with their tubes and
ovisacs intact, though the filamentous extensions of the roots could not be extracted.
viburni was initiated in Oct 2012 with nymphs, adult females, and
ovisacs collected from infested "fruits" of organically managed strawberry Fragaria x ananassa Duch.
quadripustulatus to changes in the coccid Eupulvinaria hydrangeae life stages as newly produced
ovisacs increased egg-laying of the predator.