Environment: milieu / climate zone / depth range / distribution range
البيئة
; المياه العذبة القاع. Tropical; 3°N - 10°S, 14°E - 30°E
Africa: present throughout the Congo River basin (Ref. 78218). In the Lukuga (Tanganyika outflow) up to the Kisimba-Kilia rapids (Ref. 93587). Reports of this species from Inga and the Luongo River (Zambian Congo) refer to Congoglanis inga and C. sagitta, respectively (Ref. 88958). Reports from the Luachimo River (Ref. 11970) are C. howesi (Ref. 92838).
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 14.1 cm SL ذكر/ مختلط الجنس; (Ref. 88958)
الأشواك الظهرية (المجموع) : 0; الأشعة الظهرية الناعمة (المجموع) : 8; شوكة شرجية: 0; أشعه شرجية لينه: 9 - 11. Diagnosis: Congoglanis alula differs from C. inga in having a shorter maxillary barbel not reaching to vertical through anterior margin of orbit, vs. extending well past anterior margin of orbit, respectively; a longer pelvic fin, 24–28% of standard length, vs. 19–21%; a shorter postorbital length, 27–31% of head length, vs. 32–35%; a relatively narrow interorbital width, 1.5 times eye diameter, vs. 2 times; and shorter anal-fin rays, posterior rays of adpressed anal fin extend to, rarely slightly beyond, vertical through posterior limit of adipose fin, vs. posterior rays extend well past vertical through posterior limit of adipose fin (Ref. 88958). Congoglanis alula differs from C. sagitta in having a longer pectoral fin, 28–29% of standard length, vs. 23–27%; a longer pelvic fin, 24–28% of standard length, vs. 19–21%; a shorter caudal peduncle, 18–22% of standard length, vs. 21–24%; and deeper caudal peduncle, caudal-peduncle depth 2.6–3.3 times in caudal-peduncle length, vs. 3.1–4.0 times; a relatively narrow interorbital width, 1.5 times eye diameter, vs. 2 times; a more posteriorly placed anal fin, anal-fin origin approximately at tip of adpressed pelvic fin, vs. origin well in advance of tip of adpressed pelvic fin; and fewer vertebrae, 36–39, vs. 39–41 (Ref. 88958).
Typically found in fastest flowing portions of rivers and always associated with large rocks; appears to congregate underneath rocks near where water breaks over the rocks during the day, and will move out onto the tops of rocks at night (Ref. 88958).
Life cycle and mating behavior
Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae
Ferraris, C.J. Jr., R.P. Vari and P.H. Skelton, 2011. A new genus of African loach catfish (Siluriformes: Amphiliidae) from the Congo River basin, the sister-group to all other genera of the Doumeinae, with the description of two new species. Copeia 2011(4):477-489. (Ref. 88958)
IUCN Red List Status (Ref. 130435)
استخدامات بشرية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
المرونه (Ref.
120179): وسيط, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 1.4-4.4 سنة (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
