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 / depth range / distribution range
Sinh thái học
Biển gần đáy. Subtropical; 33°S - 35°S, 83°W - 76°W
Southeast Pacific: Endemic to Juan Fernández Is.
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: 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
Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng
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 2024-2)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
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).
Mức dinh dưỡng (Ref.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Thích nghi nhanh (Ref.
120179): Trung bình, thời gian nhân đôi của chủng quần tối thiểu là 1.4 - 4.4 năm (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
