Streptocephalus proboscideus (Frauenfeld, 1873), Khartoum, Sudan.
OTHER COMMON NAMES
English: Freshwater fairy shrimp.
S. proboscideus is a medium-sized species that will attain 1.2 in (three cm) in size. The colour varies from virtually translucent to virtually black. The Latin identify of the species, proboscideus, means “with a proboscis,” and refers to a median appendage on the entrance of the pinnacle between the antennae. The male antennae are the principle characteristic used to establish this species.
Arid and semiarid areas of jap Africa, from northern Sudan to southern Africa and Namibia. (Specific distribution map not out there.)
The Sudanese fairy shrimp is thought primarily from shallow, turbid rain swimming pools through which it could type large swarms. Its cysts might lie dormant in dry mud for a number of years.
The Sudanese fairy shrimp is an lively swimmer requiring a water temperature of 77°F (25°C) or larger. It might filter as a lot as 2.11 quarts (2 liters) of water each 24 hours. S. proboscideus might stay so long as 9 months beneath laboratory situations.
FEEDING ECOLOGY AND DIET
S. proboscideus is an omnivore that may filter out particles as small as yeast cells and unicellular algae on the decrease finish of the spectrum, and as massive as 0.008 in (0.2 mm) on the higher finish. This fairy shrimp will eat its personal nauplii (larvae) and these of associated species indiscriminately.
Under optimum feeding situations, an S. proboscideus nauplius turns right into a mature particular person in lower than two weeks. The females then produce clutches of 100–300 eggs each 23 days. An common feminine might produce 35–40 such clutches in her lifetime. She should copulate and be fertilized after every clutch.
Not listed by the IUCN.
SIGNIFICANCE TO HUMANS
S. proboscideus is extensively utilized in toxicity assays of water samples. It is cultivated as of 2003 for take a look at kits used to measure the presence of heavy metallic compounds, pesticides, ethylene glycol, PCP, and related contaminants in our bodies of water. Attempts at cultivating S. proboscideus in addition to the American species Thamnocephalus platyurus to produce dry cysts for the house aquarium market, nonetheless, have failed to be commercially viable.