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Overview |
Main identification features
- uniform color
- pectorals reach anus
Dorsal rays XI,I,17-18; anal rays III, 17; lateral-line scales 56-60; gill rakers on lower limb of first arch 17; body elongate, depth 3.2-3.5 in standard length; dorsal fin deeply notched, but two portions joined at base; pectoral fins long and somewhat curved, reaching to level of anal fin origin; base of spinous part of dorsal fin shorter than base of soft part; eye large, about 2.7 in head length; lower jaw projecting; margin of preopercle finely serrated.
Silvery bluish without distinguishing marks.
Size: to 22 cm.
Habitat: forms schools in rocky shallows.
Depth: 3-20 m.
Galapagos Islands.
Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo).
Depth Range Max: 20 m.
Depth Range Min: 3 m.
Diet: zooplankton; pelagic fish larvae.
Eastern Pacific Range: Northern limit=2; Southern limit=-2; Western limit=-93; Eastern limit=-90; Latitudinal range=4; Longitudinal range=3.
Egg Type: Pelagic; Pelagic larva.
Feeding Group: Planktivore.
FishBase Habitat: Reef Associated.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Reef associated (reef + edges-water column & soft bottom); Water column.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 22 cm.
Regional Endemism: Island (s); Island (s) only; TEP endemic; TEP oceanic island (s) endemic; Galapagos Islands endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Mid Water; Near Bottom; Water column only;
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Names |
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Links to other sites |
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References |
- Allen , G.R. and Robertson, D.R., 1994., Fishes of the Tropical Eastern Pacific., Crawford House Press Pty Ltd:1-332.
- Humann, P., 1993., Reef Fish Identification: Galapagos., New World Publishing:192pp.
- Jordan , D.S. and Evermann, B.W., 1898., The fishes of North and Middle America: a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America, north of the Isthmus of Panama. Part II., Bull. U.S. Nat. Mus., 47:1241-2183.
- Kendall , W.C. and Radcliffe, L., 1912., The shore fishes. Reports on the scientific results of the expedition to the eastern tropical Pacific, ... by the U.S. Fish Commission steamer ALBATROSS, from October, 1904, to March, 1905, Lieut. Commander L.M. Garret, U.S.N., Commanding. XXV., Mem. Mus. Comp. Zool., 35(3):75-171.
- Molina, L., Danulat, E., Oviedo, M., González, J.A., 2004., Guía de especies de interés pesquero en la Reserva Marina de Galápagos., Fundación Charles Darwin / Agencia Espeñola de Cooperación Internacional / Dirección Parque Nacional Galápagos, 115pp.
- Snodgrass , R. E. and Heller, E., 1905., Papers from the Hopkins Stanford Galapagos expedition, 1898-1899. XVII. Shorefishes of the Revillagigedo, Clipperton, Cocos and Galapagos Island., Proc. Wash. Acad. Sci., 6:333-427.
- Steindachner, F., 1876., Ichthyologische Beiträage (III). Bemerkungen über Serranus nebulifer und S. clathratus sp. Gird., Sitzungsber. Akad. Wiss. Wien, 72:29-96.
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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=Xenichthys&speciesname=agassizii ---> http://192.134.151.83/Summary/speciesSummary.php?genusname=Xenichthys&speciesname=agassizii http://192.134.151.83/Summary/speciesSummary.php?genusname=Xenichthys&speciesname=agassizii ---> https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Xenichthys&speciesname=agassizii https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Xenichthys&speciesname=agassizii ---> https://fishbase.mnhn.fr/summary/Xenichthys-agassizii.html
Xenichthys agassizii
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Xenichthys agassizii
Picture by
Allen, G.R.
Teleostei (teleosts) >
Eupercaria/misc
(Various families in series Eupercaria) >
Haemulidae
(Grunts) > Haemulinae
Etymology:
Xenichthys:
Greek, xenos = strange + Greek, ichthys = fish (Ref.
45335
)
.
More on author:
Steindachner
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 3 - 18 m (Ref.
5227
), usually 3 - 11 m (Ref.
5227
). Tropical
Southeast Pacific: endemic to the Galapagos Islands.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 20.0 cm TL male/unsexed; (Ref.
11482
)
Forms large, dense, polarized schools along walls and over rocky slopes, often in somewhat protected areas (Ref.
5227
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Oviparous, distinct pairing during breeding (Ref.
205
).
Allen, G.R. and D.R. Robertson
, 1994. Fishes of the tropical eastern Pacific. University of Hawaii Press, Honolulu. 332 p. (Ref.
11482
)
IUCN Red List Status (Ref.
130435
)
Vulnerable (VU)
(B2ab(iii,v)c(iv); D2); Date assessed:
15 September 2022
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 23.5 - 24.6, mean 23.7 °C (based on 20 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01318 (0.00632 - 0.02751), b=2.99 (2.82 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.3 se; based on size and trophs of closest relatives
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).
Nutrients (Ref.
124155
): Calcium = 68.6 [22.4, 135.1] mg/100g; Iron = 0.689 [0.358, 1.240] mg/100g; Protein = 19.3 [17.4, 21.1] %; Omega3 = 0.14 [0.07, 0.23] g/100g; Selenium = 22.5 [13.1, 39.5] μg/100g; VitaminA = 109 [43, 272] μg/100g; Zinc = 1.42 [0.97, 2.17] mg/100g (wet weight);
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Updated: 2024-03-28 14:37:08 gmt
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