egg sac


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egg sac

[′eg ‚sak]
(zoology)
The structure containing the eggs of certain microcrustaceans.
References in periodicals archive ?
In this study, brown widow egg production was fairly steady for a 5-month period bracketing the summer with a significant monthly difference of brown widow egg sac clutch size between June and September (Fig.
The globular or pear-shaped egg sacs, which measure 10 - 15 mm in diameter, are white to greyish yellow with a smooth silky surface.
6) adult females and their egg sac did not significantly affect the latency to the first terminal exhibiting feeding symptoms (F = 2.
Despite laying thousands of eggs, black widow spiderlings - typically about five weeks after egg sac production - are highly cannibalistic, feeding on their siblings, resulting in few reaching adulthood.
punctulata were brought into the lab prior to egg sac construction, were placed in containers and monitored for burrow construction.
A few days later she found a dead spider and an empty egg sac on them and soon afterwards she started finding the tiny, fast-moving creatures on her curtains and walls.
Emma said: 'One egg sac can produce up to 400 spiders.
There may always be an egg sac waiting to release an egg.
The female hunting spiders, such as the wolf spider, carry a large egg sac around under their abdomen wherever they go and, once hatched, the young cling on and are carried everywhere for weeks, operating nocturnally, they hunt crawling insects relying on their own speed and size to gain their prey.
He had never encountered the eyes of a lone army ant, marching in defiance of falling rocks and rushing water along the great Amazon, the wingless queen who cannot fly from danger, blindly dragging her bloated egg sac as long as at least one leg is left uncrushed; so the dilated pupils in front of him registered insanity.
Her eggs are the same color and are laid in an egg sac that is 3 or 4 times the length of her body, which is entirely covered with white wax," says Miller.