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.
Interestingly, offspring number (as well as female condition and egg sac mass) was marginally, positively correlated with egg mass amongst desert females ([r.
vagans provided maternal care by turning the egg sac so the eggs on the bottom were at the top for a while, preventing adherence between the eggs (Baxter 1993).
These spiderlings have just hatched from a spherical silken egg sac, which the female dragged around behind her, attached to her spinnerets (wolf spiders do not make a permanent web).
Other floral motifs appear latent and gestative--the tapered petals of an oblong lotus bud are tightly bound like a capsule, simultaneously connoting the gleaming metallic hardness of a yogic murti and the discrete larval enclosure of a membranous egg sac or chrysalis.
Plants were infested by transferring adult female mealybugs with attached egg sac to the apical bud of terminals with a micro-pin tool.
and put her finger through a poisonous spider's egg sac.
When the spiderlings are developed, she opens the egg sac wall and the spiderlings climb on to her abdomen, where they hang onto her hairs.
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.
This can be removed using a pin, but if the egg sac is ruptured, it can lead to re-infection from chigger fleas or bacteria.
In channel catfish, spawning through the egg sac nutrition period spans 10 to 20 days.