Stolothrissa tanganicae Regan, 1917
Lake Tanganyika sprat
photo by Moeremans, L.

Family:  Clupeidae (Herrings, shads, sardines, menhadens), subfamily: Dorosomatinae
Max. size:  10 cm SL (male/unsexed)
Environment:  pelagic; depth range 8 - 60 m
Distribution:  Africa: endemic to Lake Tanganyika (Ref. 28136); in the Lukuga River (connecting the lake with the Lualaba River) known up to Kisimba-Kilia Falls (Ref. 93587).
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 12-18; Anal spines: 0-0; Anal soft rays: 16-27. Body slender. Pre-pelvic scute not strongly keeled, beginning behind base of last pectoral fin ray. Maxilla blade about 2.25 times as long as its shaft, but not continued forward to hind tip of pre-maxilla; second supra-maxilla diamond-shaped or more or less rhomboidal, approximately symmetrical. Lower gill rakers long and slender. A silver stripe along flanks. Snout narrow, appears concave when viewed from above.
Biology:  A lacustrine species forming very large schools. Juveniles tend to stay closer to shore than those 5 cm SL or more. They appear to stay below about 60 m by day, rising up to 8-15 m at night, especially on dark nights. Adults feed on plankton. They breed at about 6 cm SL, with ripe individuals present almost throughout the year, but major spawning in May and June and again in December and January. Adults move inshore to breed. The eggs sink slowly.
IUCN Red List Status: Least Concern (LC); Date assessed: 31 January 2006 Ref. (120744)
Threat to humans:  harmless
Country info:   

Entered by: Binohlan, Crispina B. - 17.10.90
Modified by: Luna, Susan M. - 14.07.14
Checked by: Binohlan, Crispina B. - 23.07.94

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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