分類 / Names
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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Coelotilapia: "The genus name Coelotilapia Mayland, 1995 was introduced in a popular aquarium book, but it is not available, because it was treated as a questionable new genus, but was described as a generic name under Tilapia and not used in the combination Coelotilapia joka. The name was chosen to refer to the cave-breeding habit, but Mayland refers to the Latin word coelestis, which mean celestial. Very likely he thought of the Greek word ‘koiloma’, which means cavity.".
Eponymy: Joris Thys van den Audenaerde is the describer’s son. We assume that ‘Joka’ is a nickname, as the etymology says: “dedicated to my young son Joris.” (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性; pH range: 6.0 - 8.0; dH range: 5 - 12. Tropical; 23°C - 25°C (Ref. 2060)
Africa: lower courses of rivers from Sierra Leone and western Liberia.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 9.6 cm TL オス/雌雄の選別がない; (Ref. 5163)
背面の脊椎 (合計) : 15 - 17; 背鰭 (合計) : 11 - 13; 肛門の骨: 3; 臀鰭: 8 - 9. Diagnosis: micro-gillrakers absent (Ref. 52307, 53405). Small-sized specimens; dorsal fin with 15-17 spines and 11-13 soft rays (mean 17.12); anal fin with 3 spines and 8-9 soft rays; narrow scaly sheet at the base of anal fin; 7-9 lower gill-rakers (Ref. 53405).
Mainly feeds on plants, preferring algae; pair-bonding, open substrate spawner with both parents guarding the brood (Ref. 52307).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Female lays around 200 eggs inside the male's cave. Both parents care for their young.
Dunz, A.R. and U.K. Schliewen, 2013. Molecular phylogeny and revised classification of the haplotilapiine cichlid fishes formerly referred to as "Tilapia". Mol. Phylogenet. Evol. 68(1):64-80. (Ref. 93285)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-2)
絶滅危惧 (EN) (B1ab(iii)+2ab(iii)); Date assessed: 06 May 2019
Human uses
用具
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01445 (0.00674 - 0.03099), b=2.99 (2.82 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高い, １５か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
