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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Serranochromis: Latin, serra = saw + Greek, chromis = a fish, perhaps a perch (Ref. 45335); alvum: The specific name, alvum, a noun in apposition, is derived from the Latin, which means blotches and refers to the prominent lateral pigmentation (Ref. 123822).
Environment: milieu / climate zone / depth range / distribution range
Οικολογία
; Γλυκού νερού βενθοπελαγικό; εύρος βάθους 2 - 2 m (Ref. 123822). Tropical
Africa: junction of the Cuito and Cuanavale rivers, tributary to the Okavango River in Angola (Ref. 123822).
Μέγεθος / Βάρος / Age
Maturity: Lm ? range ? - ? cm
Max length : 15.2 cm SL αρσενικό/απροσδιόριστο; (Ref. 123822)
Short description
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Ραχιαίες άκανθες (συνολικά) : 14 - 15; Μαλακές ραχιαίες ακτίνες (συνολικά) : 13 - 15; Εδρικές άκανθες: 3; Μαλακές εδρικές ακτίνες: 9 - 10. Diagnosis: The presence of ocelli throughout the anal fin of breeding males distinguishes Serranochromis alvum from S. robustus and S. jallae in which the ocelli in breeding males are restricted to the posterior 4-5 membranes of the anal fin (Ref. 123822). The exposed teeth of S. alvum differs from those of S. stappersi and S. altus, which possess small teeth that are buried in the lips; Serranochromis alvum has an emarginate caudal fin, while S. macrocephalus, S. janus, and S. angusticeps have rounded caudal fins; the shorter jaw of S. alvum, 43.4-53.5% of head length, separates it from S. spei, 53.5-57.2% of head length; Serranochromis alvum has 34-36 lateral-line scales, while S. thumbergi possesses more than 39 lateral-line scales; the acute angle of the cleft of the mouth, 50-60° of horizontal, of S. meridianus delimits it from the 30° angle of S. alvum; the long dark pectoral fins which reach past the middle of the dorsal fin separates S. longimanus from S. alvum; the interorbital width, 14.3-15.9% of head length, of S. alvum is narrower than that of S. swartzi, 17.6-19.8% of head length, S. cuanza, 16.3-18.0% of head length, and S. cacuchi, 20.0-21.7% of head length (Ref. 123822).
Found in riverbed which was mostly sand substrate with occasional marginal aquatic weed beds and fringing emergent beds of Phragmites (Ref. 123822).
Life cycle and mating behavior
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
Stauffer, J.R., Jr., R. Bills and P.H. Skelton, 2021. Four new species of Serranochromis (Teleostei: Cichlidae) from the Cuanza and Okavango river systems in Angola, including a preliminary key for the genus. Zootaxa 4908(1):66-84. (Ref. 123822)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
Εργαλεία
Special reports
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Διαδικτυακές πηγές
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [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).
Τροφικό Επίπεδο (Ref.
69278): 3.8 ±0.6 se; based on size and trophs of closest relatives
Ελαστικότητα (Ref.
120179): Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
