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Gobiiformes (Gobies) >
Gobiidae (Gobies) > Sicydiinae
Etymology: Sicydium: Greek, sika, sikya = cucumber ; diminutive (Ref. 45335).
Eponymy: Gabriel de Bustamenté was a Brazilian slave trader on São Tomé Island, Gulf of Guinea. His occupation did not stop Greef describing him as the ‘hospitable and intelligent’ (translation) owner of a farm situated on São Tomé. (Ref. 128868), visit book page.
Taxonomic Remarks
This species is validated by Risch et al. (1979: Ref. 89459) who found the types, thus it is not a nomen nudum and the name is available. The species is confirmed under this name by Pezold et al. (2006: Ref. 59380). Therefore, the species should not be attributed to Boulenger, 1916 (as Sycidium bustamantaei).
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
; zoet water benthopelagisch; amfidroom (Ref. 92840). Tropical
Eastern Atlantic: islands of Bioko, Sao Tome, Principe and Pagalu (= Annobon) in the Gulf of Guinea, up to altitudes of 1,200 m; might also occur in the Lobe and Kribi Rivers of Cameroon, but this requires confirmation (Ref. 79590).
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ?  range ? - ? cm
Max length : 100.0 cm SL mannelijk / geslacht onbekend; (Ref. 79590)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 6 - 7; Dorsale zachte stralen (totaal) : 9 - 10; Anale stekels: 1; Anale zachte stralen: 9 - 10. Diagnosis: posterior tip of upper jaw extends to vertical level of anterior third, or half, of eye; single row of long, slender, unicuspid setiform teeth on upper jaw, 19-49 teeth on each half (left and right) of upper jaw, separated by median tubercle (Ref. 79590). Upper lip smooth (Ref. 57403, 79590), with an inner longitudinal furrow and a small, median tubercle (fleshy swelling)(Ref. 79590). Median notch in upper lip absent or small (Ref. 79590). 3 pores in preopercular canal; flanks with checker-board arrangement of small, light and dark patches (Ref. 57403, 79590).
Body shape (shape guide): elongated.
Amphidromous endemics living as adults in clearwater streams from the rivers Lobe and Kribi, Southern Cameroon. Also from a stream located above several hundred meter high cascade of Rio Ilady, Bioko Island at an altitude of over 100m (Ref. 92840).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Risch, L. and D.F.E. Thys van den Audenaerde, 1979. On the West African species of the genera Sicydium Cuv. & Val. and Lentipes Gthr. Revue de Zoologie Africaine 93(4):882-900. (Ref. 89459)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van geen belang
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Schattingen op basis van modellen
Fylogenetische diversiteitsindex (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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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). |
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0 |
Weerstandsvermogen (Ref. 120179) |
Zeer laag, minimale populatieverdubbelingstijd meer dan 14 jaar (Preliminary K or Fecundity.). |
Kwetsbaarheid van de visserij (Ref. 59153) |
High to very high vulnerability (70 of 100). 🛈 |