Lake Tumba dwarf sprat
📖 Overview
Found in rivers and lakes, apparently in both running and still water, often in huge schools . Feeds on plankton, including unicellular algae, diatoms and especially copepods, but also hydracarians and aquatic insects . It breeds in Lake Tumba, ripe fishes being caught in late August and ripe and some spent fishes occurring in about mid-September .
🔬 Taxonomy
🐟 Physical Description
Dorsal spines (total): 0; Dorsal soft rays (total): 12 - 15; Anal spines: 0; Anal soft rays: 20 - 23; Vertebrae: 39 - 40. Diagnosis: Body slender, depth about 20% of standard length; scutes beginning at isthmus, or just behind, very strongly keeled, 12-15 pre-pelvic and 6-8 post-pelvic scutes; lower jaw projecting, toothless; no teeth on premaxillae or maxillae; posterior supra-maxilla as deep as maxilla blade and with long slender anterior shaft; lower gill rakers 24-31; pelvic fin with 1 unbranched and 6-7 branched rays, its insertion just before dorsal fin origin; anal fin rays 20-23; scales in lateral series 35-40 . It differs from Nannothrissa stewarti in having more gillrakers, 24-31 vs. 20-23, more anal fin rays, 20-23 vs. 17-19, and more scales in lateral series, 35-40 vs. 34-35 . : fusiform / normal; Cross section: compressed.
🌀 Behaviour
Behavioural data for Lake Tumba dwarf sprat is currently being reviewed.
🦐 Diet
Diet information for Lake Tumba dwarf sprat is currently being compiled.
🥚 Reproduction
Reproduction data for Lake Tumba dwarf sprat is currently being compiled.
🌍 Habitat & Distribution
Freshwater; pelagic. Tropical; 6°N - 3°S
🌿 Ecology
plankton, including unicellular algae, diatoms and especially copepods, but also hydracarians and aq
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🌐 Names & Taxonomy
Scientific Synonyms
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Microthrissa parva | Regan | 1917 | Synonym |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) — 14 records indexed .
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