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Tatia brunnea
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Tatia brunnea
Picture by
Schönherr, K.
Teleostei (teleosts) >
Siluriformes
(Catfishes) >
Auchenipteridae
(Driftwood catfishes) > Centromochlinae
Etymology:
Tatia:
Because of Mr. C. Tate Regan (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
South America: Suriname and Marowijne River basins in Suriname; Maroni and Sinnamary River basins in French Guiana; Negro River drainage and at a single locality in Central Amazon basin in Brazil; Trombetas river drainage in Brazil.
Length at first maturity / Size / Weight / Age
Maturity: L
m
 
?
, range 7 - ? cm
Max length : 11.6 cm SL male/unsexed; (Ref.
79512
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 1;
Dorsal
soft rays
(total): 5;
Anal
soft rays
: 10 - 11;
Vertebrae
: 34 - 36. Diagnosed from all other species of
Tatia
by the following characters: male anal fin with sharp pointed tip; the first unbranched anal-fin ray divided into 3-4 segments; and the last branched ray reduced. Can be distinguished from most of its congeners, except
Tatia aulopygia
Tatia intermedia
and
Tatia gyrina
, by having a wide mouth, width 54.0-59.7% HL (vs. 39.0-53.3% HL). Additional characteristics for recognition of
Tatia brunnea
are diagnostic in combination: nasal ossified with wide medial flanges partially sutured to lateral margin of mesethmoid; ribs 9-10; post-Weberian vertebrae 34-36. Other features useful for distinguishing
Tatia brunnea
include details in coloration, such as: border of mouth whitish, contrasting with dark head; posterior border of nuchal shield usually whitish or pale; pectoral-fin spine usually with transverse bands; caudal fin usually whitish with scattered dark brown blotches; and head width 86.6-93.4% HL (Ref.
79512
).
Sympatric with
Tatia intermedia
in some rivers in Suriname and French Guiana and also in the Trombetas river (Ref.
79512
). Rather rare, occurs in the slow parts of creeks. May easily be mistaken as juveniles of
Glanidium leopardus
with which it is distinguished by means of the pectoral spines (having projections vs. smooth) and by the number of rays in the anal fin (8-9 vs. 12-14). Sexual dimorphism in males appear at a length of 3.5-4.0 cm. Its small size makes it interesting for aquarists (Ref.
35381
). Reported sizes at sexual maturity are above 5.46 cm SL and above 7.0 cm SL (Ref.
79512
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Sarmento-Soares, L.M. and R.F. Martins-Pinheiro
, 2008. A systematic revision of
Tatia
(Siluriformes: Auchenipteridae: Centromochlinae). Neotrop. Ichthyol. 6(3):495-542. (Ref.
79512
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
19 August 2020
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.4 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).
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- 20 July 2016
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