Nitrate toxicity to Penaeus monodon protozoea
. Marine Biology, vol.
Three isotrypsins were detected from protozoea
to postlarvae, and particularly in the midgut gland of adults.
Next, the shrimp mature to protozoea
stage during which time they develop antennal locomotion and begin free swimming.
Initially, nauplii utilize yolk granules within their body as food and subsequently feeding on microalgae begins at the protozoea
Chymotrypsin showed a significantly lower activity in protozoea
3, a peak of activity between postlarvae 1 and 10, and a decrease in the following postlarval stages (Table 3).
Early larval stages (protozoea
and myses) migrate vertically in a diel cycle and there is no cross-shelf displacement during the first 15 days of development.
and Penaeus aztecus Ives larvae fed Artemia beginning at the protozoea
two substage versus the mysis-one substage.
Among the recorded taxa, 27.8% were very frequent (Table 1), especially the protozoea
of Lucifer faxoni and Acetes americanus with 91.7% each, followed by zoea of Pinnixa sp.
I, and Mysis I and III and juvenile I), C.
All the known members of the family Penaeidae have a similar life cycle: planktonic larval stages; including nauplius, protozoea
, mysis, and postlarva; followed by juvenile and adult stages (Dall et al.