brine shrimp

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brine shrimp,

common name for a primitive crustaceancrustacean
, primarily aquatic arthropod of the subphylum Crustacea. Most of the 44,000 crustacean species are marine, but there are many freshwater forms. The few groups that inhabit terrestrial areas have not been particularly successful in an evolutionary sense; most require
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 that seldom reaches more than 1-2 in. (1.3 cm) in length and is commonly used for fish food in aquariums. Brine shrimp, which are not closely related to true shrimp, can be found almost everywhere in the world in inland saltwaters, although they are completely absent from oceans. They can live in water having several times the salinity of seawater, but they can also tolerate water having only one tenth the marine salt concentration. Brine shrimp usually occur in huge numbers and can be seen in vast windblown lines in the Great Salt Lake. Their absence from the sea has been explained by their vulnerability to attack by predators and the absence of the latter in their inland saline habitat. Although brine shrimp are considered to be members of a single genus, Artemis, and possibly a single species, there are several varieties. Generally, they have stalked, compound eyes and tapered bodies with a trunk that bears 11 pairs of leaflike legs. Females have a brood pouch from which active young are liberated under favorable conditions. Otherwise eggs are laid parthenogenetically (unfertilized by sperm) or fertilized and can either hatch immediately or be dried and remain viable for many years. These eggs are remarkably resistant to adverse environmental conditions, which is why they can be hatched so easily in saltwater and used for fish food; adult brine shrimp are also used as food in aquariums and are generally sold frozen. Brine shrimp are classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
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, subphylum Crustacea, class Branchiopoda, order Anostraca.
References in periodicals archive ?
I the cytotoxicity assay, at 3000ug/mlconcentrations maximum death of brine shrimp was reported.
Keywords: brine shrimp lethality test, paper disc diffusion assay, peripheral blood micronucleus test, Coriolus versicolor
The biological activities such as antibacterial, antifungal, antitumor, DNA damage activities and brine shrimp toxicity were thoroughly evaluated.
0 individual dead shrimp were highly toxic to the brine shrimps.
The American brine shrimp as an exotic invasive species in the western Mediterranean.
poopoensis on Artemia nauplii is probably the main factor reducing the abundance of the brine shrimps with salinity concentrations <90 g L (1) (Hurlbert et al.
The brine shrimp lethality bioassay was carried out on the methanol extracts using standard procedure described by Ayo et al.
The brine shrimp lethality test was used to predict the presence of cytotoxic activity in the extracts [3,4] with some modifications.
Knipholone was screened for cytotoxicity against brine shrimp nauplii in a micro-dilution assay and showed a weak cytotoxic effect with E[D.
Cytotoxic effect of the Cardia obaliqua methonolic crude extracts was measured and noted against brine shrimps growth as shown in Table 1.
Phytochemical screening was done to support the results of the following tests: toxicity test by calculating LC50 using brine shrimp lethality test; antioxidant screening using thin-layer chromatography; and purgative test by anthelmintic assay using Eudrilus eugeniae as test organisms.