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Praealticus margaritatus, Pearly rockskipper
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Pearly rockskipper
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drawing shows typical species in Blenniidae.
Teleostei (teleosts) >
Blenniiformes
(Blennies) >
Blenniidae
(Combtooth blennies) > Salariinae
Etymology:
Praealticus:
Latin, prae = in front of + Latin, altus, alticus = nutritious
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; pelagic-neritic. Tropical
Western Central Pacific: American Samoa and Fiji.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 7.3 cm SL male/unsexed; (Ref.
54980
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 12 - 13;
Dorsal
soft rays
(total): 17-19;
Anal
spines
: 2;
Anal
soft rays
: 18 - 21. Upper lip edge generally partly crenulate; color note from description: females warm brown, paler on belly; head with a slight purplish tinge, darker on snout and lips; only a slight trace of crossbars; body with small, pale pearly spots, most numerous posteriorly; crest dark brown, thickly dotted with small pearly or bluish spots; pectorals dark brown; spinous dorsal fin dark brown with a series of large, oblique, oblong black spots, 1 on each membrane; second dorsal fin dark brown with numerous narrow, pale oblique streaks; caudal fin dark brown, appearing almost black; anal fin dark brown with darker margin; pelvic fins black. Males paler with pearly spots more distinct and more numerous anteriorly; head covered with small dusky spots; crest without white spots; large black spots only on first 2 membranes of dorsal fin. Anal soft rays rarely 18 or 21; segmented caudal rays 13-14 (typically 14) with middle 3-9 branched; lateral line pores 1-6 (Ref.
54980
).
Facultative air-breathing (Ref.
126274
); 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
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Oviparous, distinct pairing (Ref.
205
).
Springer, V.G., J.T. Williams and T.M. Orrell
, 1991. Catalog of type specimens of recent fishes in the National Museum of Natural History, Smithsonian Institution, 2: Blenniidae. Smithson. Contrib. Zool. 519:28. (Ref.
10697
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
27 March 2009
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Zoological Record
Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00741 (0.00335 - 0.01640), b=3.02 (2.83 - 3.21), 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.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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