Classification / Names
প্রচলিত নাম সমূহ | প্রতিনাম সমূহ | Catalog of Fishes(গণ , প্রজাতি ) | ITIS | CoL | WoRMS | Cloffa
>
Siluriformes (Catfishes) >
Claroteidae (Claroteid catfishes) > Claroteinae
Etymology: Chrysichthys: Greek, chrysos = golden + Greek, ichthys = fish (Ref. 45335); praecox: From the Latin 'praecox', meaning early ripening or precocious, in reference to the small size at which this species matures (Ref. 78725).
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
; স্বাদু পানি তলদেশ বিহারী. Tropical
Africa: only known from Lake Mai-Ndombe (middle Congo River basin), Democratic Republic of the Congo (Ref. 78725).
আকৃতি / ওজন / Age
Maturity: Lm ? range ? - ? cm
Max length : 6.3 cm SL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 78725)
Short description
সনাক্তকারী নির্দেশক | বহিঃ অঙ্গ সংস্থান | মরফোমেট্রিক্স
This species is distinguished from other Chrysichthys by having vomerine accessory toothplates forming a smooth arc, narrowly separated in midline and broadening posteriorly in adult males; narrow and sharply pointed supraoccipital process; upper jaw extending beyond lower jaw; strong postcleithral process; maxillary barbel length 2,7-4,8 times in standard length; nasal barbel reaching the orbit; uniformly dark pigmentation; and 14-19 gill rakers on the first gill arch (Ref. 78725).
Lac Mai-Ndombe is a 'blackwater' lake with an acidic pH (4.0-5.5); maximum depth is 10 m; limits increase dramatically during seasonal rains; C. praecox is a small claroteid catfish with marked secondary sexual dimorphism; matures at small size (Ref. 78725).
Life cycle and mating behavior
Maturities | প্রজনন | Spawnings | Egg(s) | Fecundities | শুককীট
Hardman, M. and M.L.J. Stiassny, 2008. A sexually dimorphic species of Chrysichthys (Siluriformes: Claroteidae) from Lac Mai-Ndombe, Democratic Republic of the Congo. Ichthyol. Explor. Freshwat. 19(2):175-184. (Ref. 78725)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
হাতিয়ার
Special reports
Download XML
ইন্টারনেট সুত্র
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00471 - 0.02328), b=2.99 (2.81 - 3.17), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
স্থিতিস্থাপক (Ref.
120179): উচ্চ, সর্বনিম্ন প্রজন দ্বিগুনের সময় ১৫ মাস (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
