Packard explained that the spiny water flea produces a thick-walled resting egg
that can remain dormant for long periods of time and is resistant to environmental extremes of temperature and dryness.
production and oviductal cycling in two sympatric species of alpine diaptomids (Copepoda:Calanoida) in relation to temperature and food availability.
Sex, parthenogenesis and genetic structure of rotifers: microsatellite analysis of contemporary and resting egg
'Ancient' DNA in the resting egg
bank of a microcrustacean can serve as a palaeolimnological database.
Of 195 patients with abnormal resting EGG
results, 102(52%) had abnormal scans and 60 of them had scans considered high risk.
The resting egg
bank presented 20 taxa in the different environments, 12 cladocerans and 8 of rotifers, with prominence of the family Sididae (4 taxa) among the first group, and the family Brachionidae (6 taxa), for the second group (Table 1).
They also noted that exposure of daphnids to 31 nM pyriproxyfen for 14 days significantly reduced fecundity and stimulated resting egg
(1997) attributed the dispersal of this genus in the Neotropics to the transport of resting eggs
of these individuals by migratory birds.
These fertilised, resting eggs
remain enclosed in a specially thickened part of the female's brood pouch and, at the mother's next moult they are discarded.
In inhospital conditions, mating spiny water fleas produce "resting eggs
" that are first carried in the females' brood pouches and later released to sink to lake sediments, where they lie dormant until the water warms in spring or summer.
Even in dry portions of tanks, organisms can often survive within tiny, hardy cysts called resting eggs
, says Reid.
Belk (1989) discussed the species-specific nature of the surface structure of resting eggs
for Eulimnadia (Fig.