Zoea

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zoea

[zō′ē·ə]
(invertebrate zoology)
An early larval stage of decapod crustaceans distinguished by a relatively large cephalothorax, conspicuous eyes, and large, fringed antennae.

Zoea

 

a pelagic larva, one of the developmental stages of decapods. The body consists of a cephalothorax and a segmented abdomen. Only the front thoracic appendages (maxillipeds) and only the hind abdominal appendages (uropods; absent in crab zoea) are developed; the rest are in the embryonic state. The eyes are sessile. The zoea swims with the aid of its maxillipeds. The unique crab zoea have an almost spherical cephalothorax (with long fore, dorsal, and two lateral spines) and narrow abdomen.

References in periodicals archive ?
Nevertheless, snow crab zoeae are also found at salinities ranging from 24 to 32 in the Gulf of St.
The first grapsid zoeae can be distinguished from other grapsid larvae by the reduction of the antennal exopod to a small seta (Fransozo et al.
The null hypothesis was that there are no differences in the development rate or survival of zoeae brooded in or developing in waters of southern Californian embayments when compared with zoeae developing in a nearby exposed coastal environment.
The completed life cycle of the octopus (Octopus vulgaris, Cuvier) under culture conditions: paralarval rearing using Artemia and zoeae, and first data on juvenile growth up to 8 months of age.
first and second zoeae) are found mainly at depths shallower than 150 m, and megalopae are found in deeper strata than zoeae (Kon et al.
Growth and development of the portunid crab Callinectes arcuatus Ordway: zoeae, megalopae and juveniles.
The following measurements were taken from preserved larvae by using an ocular micrometer: total length (TL), from the tip of the rostrum to the tip of the caudal end or telson; carapace length (CL), from the anterior margin of the carapace to the midposterior margin of the carapace for zoeae, from the postorbital margin to the midposterior margin of the carapace for mysis and first postlarvae; body width (BW), the greatest width across the body for nauplii.
decussata, the first zoeae of the crab Chasmagnathus granulata, and the young crab Chasmagnathus granulata were 62,4 [micro]g/L (LaBreche 1998, LaBreche et al.
The fiddler crab Uca pugnax was by far the more abundant of the 2 species, had higher mean density within patches of zoeae, and was more widely distributed in the study area.
Red king crab zoeae migrate vertically from depth at night to surface waters during the day (Shirley & Shirley 1988); it is not known whether, like some other planktonic decapod larvae, RKC larvae affect the directionality of their lateral movement by migrating vertically to take advantage of favorable currents (e.
For example, zoeae of both the blue crab Callinectes sapidus and fiddler crabs Uca spp.