Issue
Vera & Pequeño
(2001) compared the insular populations of Sicyases with
those of continental Chile and supported the differentiation
between insular and continental species. Vera & Pequeño
(2001) followed De Buen (1960) in considering the
insular species as S. hildebrandi rather than the earlier S.
brevirostris. Sicyases brevirostris is considered by us as
senior synonym of S. hildebrandi following Briggs’ (1955)
conclusion based on examination of type material, rather
than following De Buen’s doubt that Guichenot (1848)
ever had specimens from the islands and his ascription
of S. brevirostris as junior synonym of S. sanguineus.
Briggs (1955) distinguished Sicyases brevirostris from S.
sanguineus by a smaller head (>30% vs. <30% SL) and
more anal fin rays (9 vs. 7-8). Vera & Pequeño’s (2001)
study included an additional feature to distinguish both
species: S. brevirostris with smooth skin and S. sanguineus
with rugose skin except in the smallest specimens. Further
research is needed, possibly at the molecular level, in
order to determine whether these island populations are
indeed distinct from their continental counterparts and if
there has been any dispersal.
Environment: milieu / climate zone / distribuzione batimetrica / distribution range
Ecologia
marino demersale. Subtropical; 33°S - 35°S, 83°W - 76°W
Southeast Pacific: Endemic to Juan Fernández Is.
Size / Peso / Age
Maturità: Lm ? range ? - ? cm
Facultative air-breathing in the genus (Ref. 126274); Species distinct from continental ones, and not syntopic with Gobiesox marmoratus Jenyns, 1842 (Ref. 89357).
Life cycle and mating behavior
Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve
Dyer, B.S. and M.W. Westneat, 2010. Taxonomy and biogeography of the coastal fishes of Juan Fernández Archipelago and Desventuradas Islands, Chile. Rev. Biol. Mar. Oceanogr. 45(S1):589-617. (Ref. 89357)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Strumenti
Special reports
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Fonti Internet
Estimates based on models
Phylogenetic diversity index (Fonte Biblio.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00617 (0.00250 - 0.01521), b=3.15 (2.94 - 3.36), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Fonte Biblio.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Resilienza (Fonte Biblio.
120179): Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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