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Overview |
Main identification features
- nape scaleless
- back ~6 dark saddles
- side: row dark and yellow blotches;
- upper jaw ~to end preopercle
- pectoral: top ray with free tip
Moderately elongate, body compressed; head large (>25% of total length), broad, more depressed and pointed than in G. mirabilis; narrow bony ridge over eye, no median bony ridge between eyes; eyes small, far apart; sensory papillae on head few and separated (small, crowded and numerous in G. mirabilis); jaws very long - lower extends past eye 1/2 way to gill opening, upper extends to edge of preopercle in adults; preopercle covered with skin; teeth small, conical, in bands of 4-5 rows on each jaw; first dorsal fin low, rounded, 6 spines, 10-11 rays; anal fin short, 9-11 rays; pectoral broad, rounded, 20-23 rays, small top ray free from fin for ~1/4 of its length (completely joined to fin in G. mirabilis); tail rounded; membrane between pelvic fin spines with large side lobes; scales small, imbedded, rough in juveniles, smooth in adults; ~65 in lateral row, nape, scaleless (present on nape in G. mirabilis) or head, base of pectoral or throat; skin covered with thick mucous.
Sides light brown, with alternating dark brown and pale yellow blotches; ~6 irregular diffuse black saddles on back; belly yellowish.
Size: 6 cm.
Habitat: rocky tide pools with fine sand bottoms.
Depth: 0-2 m.
Northern Gulf of California.
Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California); Northern Subtropical (Cortez Province + Sinaloan Gap).
Depth Range Max: 2 m.
Depth Range Min: 0 m.
Diet: mobile benthic crustacea (shrimps/crabs); mobile benthic worms.
Eastern Pacific Range: Northern limit=32; Southern limit=29; Western limit=-115; Eastern limit=-112; Latitudinal range=3; Longitudinal range=3.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: TEP non-endemic; East Pacific endemic; All species.
Habitat: Estuary; Mud; Sand & gravel; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 6 cm.
Regional Endemism: Continent; Temperate Eastern Pacific, primarily; Tropical Eastern Pacific (TEP) non-endemic; Northern Gulf of California endemic; Continent only; All species.
Residency: Vagrant.
Salinity: Brackish; Non Marine.
Water Column Position: Bottom; Bottom only;
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Names |
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Links to other sites |
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References |
- Barlow, G. W., 1961., Gobies of the genus Gillichthys, with comments on the sensory canals as a taxonomic tool., Copeia, 1961:423-437.
- Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versión 1.0. Projecto de la Macrofauna del Golfo . Derechos reservados de los autores y Conservación Internacional.
- Ginsburg, I., 1938., Eight new species of gobioid fishes from the American Pacific coast., Allan Hancock Pacific Expeditions, 2(7):109-121.
- Thomson , D.A. , Findley , L.T. and Kerstitch, A.N., 2000., Reef fishes of the Sea of Cortez., University of Texas Press(Revised Ed.):353.
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Acknowledgements |
I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.
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http://www.fishbase.org/Summary/speciesSummary.php?genusname=Gillichthys&speciesname=seta ---> http://192.134.151.83/Summary/speciesSummary.php?genusname=Gillichthys&speciesname=seta http://192.134.151.83/Summary/speciesSummary.php?genusname=Gillichthys&speciesname=seta ---> https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Gillichthys&speciesname=seta https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Gillichthys&speciesname=seta ---> https://fishbase.mnhn.fr/summary/Gillichthys-seta.html
Gillichthys seta, Shortjaw mudsucker
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Shortjaw mudsucker
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drawing shows typical species in Gobiidae.
Teleostei (teleosts) >
Gobiiformes
(Gobies) >
Gobiidae
(Gobies) > Gobionellinae
Etymology:
Gillichthys:
Theodore Nicolas Gill (1837-1914) researcher of abyssal fishes and systematics + Greek, ichthys = fish (Ref.
45335
)
.
More on author:
Ginsburg
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal. Subtropical
Eastern Central Pacific: known from the type locality, Puerto Refugio, Isla Angel de la Guarda, Gulf of California.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Facultative air-breathing (Ref.
126274
); Found in high intertidal pools and tidal rivulets of rocky and sandy shores (Ref.
90849
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Swift, C.C., L.T. Findley, R.A. Ellingson, K.W. Flessa and D.K. Jacobs
, 2011. The Delta Mudsucker,
Gillichthys detrusus
, a valid species (Teleostei: Gobiidae) endemic to the Colorado River Delta, Northernmost Gulf of California, Mexico. Copeia 1:93-102. (Ref.
90849
)
IUCN Red List Status (Ref.
130435
)
Vulnerable (VU)
(B2ab(iii)); Date assessed:
22 May 2007
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
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00349 - 0.02862), b=3.09 (2.85 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.6 ±0.5 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (11 of 100).
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Updated: 2024-05-23 03:46:12 gmt
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