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Praealticus caesius (Seale, 1906)

Blackmargin rockskipper
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Praealticus caesius
Picture by Randall, J.E.

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (Straalvinnigen) > Perciformes (Perch-likes) > Blenniidae (Combtooth blennies) > Salariinae
Etymology: Praealticus: Latin, prae = in front of + Latin, altus, alticus = nutritious.  More on author: Seale.

Environment: milieu / climate zone / depth range / distribution range Ecologie

; marien.   Tropical; 21°S - 24°S, 176°W - 128°W

Verspreiding Landen | FAO regio's | Ecosystems | Voorkomen | Point map | Introducties | Faunafri

Western Central Pacific. Eastern Central Pacific: Pitcairn (Ref. 41650) and French Polynesia (Ref. 46206).

Size / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 7.9 cm SL mannelijk/geslacht niet bekend; (Ref. 54980)

Korte beschrijving Morfologie | Morfometrie

Dorsale stekels (totaal): 13; Dorsale zachte stralen (totaal): 17-20; Anale stekels 2; Anale zachte stralen: 19 - 22. Lip margins smooth; females dorsally whitish to light gray and ventrally white with a series of 6 paired black spots (anterior 2 pairs irregular with a row of spots above) on upper side of body, and 1 spot on caudal peduncle, each connected by a gray bar to a lower series; a black line on back at spinous portion of dorsal fin, and 4 pairs of small black spots along base of soft portion; small bluish white spots on posterior half of body, mostly on upper half; narrow black bars ventrally on head angling on to throat; a white line at posterior edge of eye continuing below to upper lip; median fins with blackish margins; posterior part of crest with a narrow pink margin and a broad, submarginal black band; dorsal-fin base with alternating black and whitish blotches; a black spot at midbase of caudal fin; males similar except with darker body; bluish white spots on body generally elliptical; faint oblique black bands on throat; oblique white lines in soft portion of dorsal fin. Last spine of dorsal fin very small; dorsal soft rays usually 19; anal soft ray rarely 19 or 22; middle 6-9 of 14 segmented caudal rays branched; lateral-line pores 5-9 (Ref. 54980).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

Adults are found in tidepools (Ref. 54980). Oviparous. Eggs are demersal and adhesive (Ref. 205), and are attached to the substrate via a filamentous, adhesive pad or pedestal (Ref. 94114). Larvae are planktonic, often found in shallow, coastal waters (Ref. 94114).

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Oviparous, distinct pairing (Ref. 205).

Voornaamste referentie Upload your references | Referenties | Coördinator : Williams, Jeffrey T. | Medewerkers

Springer, V.G., 2001. Blennidae. Blennies (combtooth and sabertooth blennies). p. 3538-3546. In K.E. Carpenter and V. Niem (eds.) FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Vol. 6. Bony fishes part 4 (Labridae to Latimeriidae), estuarine crocodiles. FAO, Rome. (Ref. 12848)

Status op de Rode Lijst van het IUCN (Ref. 119314)

  Niet bedreigd (LC) ; Date assessed: 27 March 2009

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 24.7 - 25.9, mean 25.6 (based on 21 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5001   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00324 - 0.01411), b=2.99 (2.81 - 3.17), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.0   ±0.00 se; Based on food items.
Weerstandsvermogen (Ref. 69278):  Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Kwetsbaarheid (Ref. 59153):  Low vulnerability (19 of 100) .