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Cathorops melanopus, Dark sea catfish
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Cathorops melanopus
Picture by
Ayala Pérez, L.A.
Teleostei (teleosts) >
Siluriformes
(Catfishes) >
Ariidae
(Sea catfishes) > Ariinae
Etymology:
Cathorops:
Greek, kathorao = to observe, to watch + Greek, ops = appearance (Ref.
45335
)
.
More on author:
Günther
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
Central America: Rio Motagua, Guatemala; probably in the Honduran portion of the rio Motagua near itsmouth. Reports from Mexico, Nicaragua, Costa Rica and Panama by previous authors are erroneous.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 23.0 cm TL male/unsexed; (Ref.
58022
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 1;
Dorsal
soft rays
(total): 7;
Anal
soft rays
: 19 - 20. Distinguished from all other species of
Cathorops
by the possession of the following features: gill rakers on first arch 16-18; anal fin with 19-20 rays; snout length 5.3-5.5% SL; and posterior margin of pectoral-fin spine with prominent serrations, except in
Cathorops aguadulce
,
Cathorops kailolae
,
Cathorops multiradiatus
, and
Cathorops tuyra
. Can be further differentiated from other congeners by the following combination of characters: distance from tip of snout to dorsal-fin origin 30.0-32.6% SL; distance from tip of snout to posterior margin of dorsomedian groove of neurocranium 17.9-19.1% SL; absence of fleshy papillae intercalated with gill rakers on first two arches; head length 22.3-23.0% SL; distance between lateral cornu of lateral ethmoid and external limb of supracleithrum 19.3-19.6% SL; distance between the anterior nostrils 3.6-4.4% SL; distance between posterior nostrils 4.4-5.1% SL; orbital diameter 4.5-5.0% SL; interorbital distance 11.1-12.1% SL; mouth width 8.9-9.7% SL; premaxilla width 5.1-5.8% SL; intense black pigmentation on pelvic fin; distance from tip of snout to pelvic-fin origin 46.2-49.1% SL; dorsal-fin spine length 17.2-18.1% SL; caudal-peduncle height 8.7-9.0% SL; width of cephalic shield at supracleithrum area 16.7-16.9% SL; and body width 19.6-20.1% SL (Ref.
75004
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Marceniuk, A.P. and C.J. Ferraris Jr.
, 2003. Ariidae (Sea catfishes). p. 447-455. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the freshwater fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref.
39852
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
06 February 2020
CITES
Not Evaluated
Not Evaluated
Threat to humans
Traumatogenic (Ref.
58010
)
Human uses
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Zoological Record
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=0.00851 (0.00523 - 0.01386), b=3.10 (2.96 - 3.24), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245
).
Trophic level (Ref.
69278
): 4.2 ±0.8 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 (13 of 100).
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