Ewaso Nyiro barb

📖 Overview

Ewaso Nyiro barb (Enteromius mimus) is a ray-finned fish of the family Cyprinidae. It inhabits freshwater waters. This species can reach a maximum total length of 4.6 cm. With a trophic level of 3, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Least Concern on the IUCN Red List.

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 10 - 11; Anal spines: 0; Anal soft rays: 8 - 9. Diagnosis: Enteromius mimus belongs to the group of species of Enteromius with a flexible last unbranched dorsal fin ray that lacks serrations along its posterior edge . Enteromius mimus can easily be distinguished from the other species of this group from the East Coast and Nilo-Sudan ichthyofaunal regions by the following combinations of characteristics: a complete lateral line vs. an incomplete lateral line in E. atkinsoni, E. pumilus, E. serengetiensis, E. tongaensis and E. toppini; two pairs of barbels vs. one pair in E. pseudotoppini, and no barbels in E. anema and E. profundus; one to three dark spots on the flanks, which sometimes fuse into a mid-lateral line in preserved specimens, starting posterior to the operculum vs. a dark line running from the tip of the snout to the caudal fin base in E. bifrenatus and E. yongei, and a thin dark line from the beginning of the operculum to the caudal fin base in E. viviparus; 11-12 scales around the caudal peduncle vs. 8 in E. leonensis, 9-10 in E. venustus, and 10 in E. magdalenae and E. yeiensis; 24-27 lateral line scales vs. 30 in E. lineomaculatus, and 31 in E. innocens; 3.5-4.5 scales between the dorsal fin base and the lateral line vs. 5.5 in E. unitaeniatus and 6 in E. usambarae; 3-4 scales between the lateral line and the pelvic fin vs. 2 in E. trispilopleura, and 2-2.5 in E. neglectus; 7-8 branched dorsal fin rays vs. 9 in E. quadripunctatus; a body depth which is larger than the head length vs. a body depth which is equal to the head length in E. nigeriensis; a smaller snout length, 4.1-7.1% of standard length vs. 7.1-10.1% in E. radiatus . It differs from E. perince by a combination of a lower number of lateral line scales, 24-27 vs. 29-30, a lower number of scales between the dorsal fin base and lateral line, 3.5-4.5 vs. 5.5, a lower number of scales around the caudal peduncle, 11-12 vs. 14, a smaller interorbital width, 6.3-8.3% of standard length vs. 9.8-10.2%, a larger pre-pectoral distance, 26.0-29.0% of standard length vs. 23.1-24.5%, a lower minimum caudal peduncle depth, 11.1-14.0% of standard length vs. 15.0-16.4%, a lower maximum caudal peduncle depth, 12.9-16.5% of standard length vs. 17.7-19.4%, and a smaller anal fin base length, 7.3-8.7% of standard length vs. 8.5-9.6% . It differs from E. stigmatopygus by a combination of a smaller pre-pectoral distance, 26.0-29.0% of standard length vs. 29.1-33.1%, and a larger anal fin length, 18.0-19.7% of standard length vs. 12.6-17.4% . Enteromius mimus differs from E. alberti by a lower number of lateral line scales, 24-27 vs. 27-34, a larger pre-anal distance, 68.4-74.8% of standard length vs. 65.1-73.0%, a smaller post-anal distance, 16.3-19.3% of standard length vs. 16.3-24.2%, a larger body depth, 26.5-34.3% of standard length vs. 21.7-31.2%, a larger head depth, 17.8-21.8% of standard length vs. 15.1-19.0%, and a larger pelvic fin length, 18.2-22.4% of standard length vs. 15.0-20.9% . Specimens from E. mimus differ from the specimens of the population of E. cf. mimus from the Lake Edward system by a lower number of scales between the origin of the dorsal fin and the lateral line, 3.5-4.5 vs. 3.5-4.5, a larger pelvic fin length, 18.2-22.4% of standard length vs. 14.4-21.3%, a smaller snout length, 4.1-7.1% of standard length vs. 4.6-8.3%, a smaller interorbital width, 6.3-8.3% of standard length vs. 6.9-9.9%, a larger post-dorsal distance, 34.8-40.4% of standard length vs. 31.0-39.9%, and a larger anal fin length, 18.0-19.7% of standard length vs. 14.4-21.8% .

🌀 Behaviour

Behavioural data for Ewaso Nyiro barb is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical; 5°N - 5°S

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🌐 Names & Taxonomy

Scientific Synonyms

🦠 Common Diseases

The following diseases are known to affect Ewaso Nyiro barb.

🐠 Related Species

🔍 Similar Species

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .

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