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Ogilbia robertsoni P. R. Møller, W. Schwarzhans and J. G. Nielsen, 2005
BROWN BROTULA
Life   Vertebrata   Fish   Bythitidae   Ogilbia

Ogilbia robertsoni
© Copyright Ross Robertson, 2006 · 12
Ogilbia robertsoni

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Ogilbia robertsoni
© Copyright Photographer/SFTEP, 2002 · 0
Ogilbia robertsoni
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Overview
Main identification features
  • top jaw - end low
  • dorsal fin 66-77
  • lower jaw - rear 3 pores small
  • anal fin origin under dorsal fin 20-25
Body elongate, slender and somewhat compressed; head relatively long (24.1-28.1% of SL), and low (height 13.6-16.2 % of SL); rear end of top jaw low; rear 3 pores of bottom jaw small; snout rounded; mouth large; a sharp spine on opercle that has 1 tip; eye relatively large (2.1-2.6% of SL); wide between eyes; upper part of preopercle with a pore; gill rakers 13-17; origin of dorsal fin at level of middle of pectoral fins; pelvic fins inserted below rear part of head; dorsal rays 66-77; anal rays 51-57; origin of anal fin under dorsal rays 20-25; pectoral rays 18-22; tail fin rays 15-16; body covered with relatively large overlapping scales, about 110 in midlateral series; patch of cheek scales with 8 (6-9) vertical rows of scales; belly with scales; penis long, curved, tapering, thin; 2 pairs of long pseudoclaspers associated with penis, outer pair slender, ending in a spine-like tip, inner pair long, thin, with a fleshy appendix at rear.

Light brown, belly yellowish; dorsal fin with brown base, yellow center, pale outer part; tail and anal fins yellow.

Size: reaches 8 cm.

Inhabits shallow reefs.

Depth: 6-27 m.

The SE Gulf of California to northern Costa Rica.
Attributes
Cites: Not listed.
Climate Zone: Northern Tropical (Mexican Province to Nicaragua + Revillagigedos); Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo).
Depth Range Max: 27 m.
Depth Range Min: 6 m.
Diet: mobile benthic crustacea (shrimps/crabs); zooplankton.
Eastern Pacific Range: Northern limit=21; Southern limit=7; Western limit=-106; Eastern limit=-81; Latitudinal range=14; Longitudinal range=25.
Egg Type: Live birth; Pelagic larva.
Feeding Group: Carnivore.
Global Endemism: East Pacific endemic; Tropical Eastern Pacific (TEP) endemic; All species.
IUCN Red List: Not evaluated / Listed.
Length Max: 8 cm.
Regional Endemism: TEP endemic; Continental TEP endemic; Mexican + Panamic provinces endemic; Continent only; Continent; All species.
Residency: Resident;


Links to other sites

References
  • Møller, P.R., Schwarzhans, W., Nielsen, J.G., 2005., Review of the American Dinematichthyini (Teleostei: Bythitidae). Part II. Ogilbia., Aqua, 10:133-207.

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=Ogilbia&speciesname=robertsoni ---> http://52.67.158.155/Summary/speciesSummary.php?genusname=Ogilbia&speciesname=robertsoni
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Ogilbia robertsoni, Brown brotula
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Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Ogilbia robertsoni Møller , Schwarzhans & Nielsen , 2005

Brown brotula Add your observation in Fish Watcher
Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Ogilbia robertsoni   AquaMaps   Data sources: GBIF OBIS
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Google image Image of Ogilbia robertsoni (Brown brotula) No image available for this species;
drawing shows typical species in Dinematichthyidae.

Classification / Names Common names | Synonyms | Catalog of Fishes( genus , species ) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Ophidiiformes (Cusk eels) > Dinematichthyidae (Viviparous brotula)
Etymology: Ogilbia: Taken from Ogilby, 1887-1915, icthiologist and zoologist (Ref. 45335 ) ;   robertsoni: Named for Dr. D. Ross Robertson, Smithsonian Tropical Research Institute, Panama (STRI). .
More on authors: Møller , Schwarzhans & Nielsen .

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; demersal; depth range 6 - 27 m (Ref. 57883 ). Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Eastern Pacific: Mexico to Costa Rica.

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 7.1 cm SL male/unsexed; (Ref. 57883 )

Short description Morphology | Morphometrics

Dorsal soft rays (total): 67-77; Anal soft rays : 51 - 57; Vertebrae : 39 - 41. This species is distinguished by the following characters: Vertebrae 11 + 28-30 = 39-41, dorsal fin rays 67-77, anal fin rays 51-57, outer pseudoclasper with a single, long supporter, extruding into spine-like tip; inner pseudoclasper is slender with a long, straight supporter, almost length of supporter of outer pseudoclasper with ligamentous connection to outer pseudoclasper anteriorly; penis tapering; opercular spine with single sharp tip; scale patch on cheeks with 6-9 vertical scale rows; otolith length: height ratio 2.2-2.3 (Ref. 57883 ).

Biology     Glossary (e.g. epibenthic)

Habitat not known; no ripe females were observed (Ref. 57883 ).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Møller, P.R., W. Schwarzhans and J.G. Nielsen , 2005. Review of the American Dinematichthyini (Teleostei: Bythitidae). Part II. Ogilbia . aqua, J. Ichthyol. Aquat. Biol. 10(4):133-207. (Ref. 57883 )

IUCN Red List Status (Ref. 130435 )

  Least Concern (LC)  ; Date assessed: 29 April 2008

CITES

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans

  Harmless





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Estimates based on models

Preferred temperature (Ref. 123201 ): 26.8 - 29.1, mean 28.3 °C (based on 118 cells). Phylogenetic diversity index (Ref. 82804 ):  PD 50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245 ). Trophic level (Ref. 69278 ):  3.3   ±0.5 se; based on size and trophs of closest relatives Fishing Vulnerability (Ref. 59153 ):  Low vulnerability (10 of 100).

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Updated: 2024-04-25 11:17:02 gmt
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