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Pseudauchenipterus nodosus, Cocosoda catfish : fisheries, bait
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Pseudauchenipterus nodosus
Picture by
Rotundo, M.M.
Teleostei (teleosts) >
Siluriformes
(Catfishes) >
Auchenipteridae
(Driftwood catfishes) > Auchenipterinae
Etymology:
Pseudauchenipterus:
Greek, pseudes = false + Greek, auchen = neck + Greek, pteron = wing, fin (Ref.
45335
)
.
More on author:
Bloch
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; brackish; demersal; pH range: 6.5 - 8.0; dH range: ? - 30. Tropical; 20°C - 25°C (Ref.
2060
)
South America: Lower reaches of rivers and into estuaries from Venezuela to Brazil, at least to Bahia, including southern Trinidad.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 22.0 cm SL male/unsexed; (Ref.
37098
); common length : 25.0 cm TL male/unsexed; (Ref.
3270
)
Dorsal
spines
(total): 1;
Dorsal
soft rays
(total): 6;
Anal
spines
: 0;
Anal
soft rays
: 20 - 25. Body is thick compared to that of
Auchenipterus
. Snout is very rounded, with a recessed lower jaw. The moderately large eyes are lateral in position. The zigzag lateral line is complete. The branchiospines are short and numerous. The caudal fin has 17 spines (Ref.
35381
).
Found over muddy bottoms in brackish river mouths. Probably prefers large rivers and slightly brackish waters (Ref.
11225
,
27188
). Occurs in very thick schools over muddy bottoms. Omnivorous, with a tendency towards detritivorous feeding. Searches for food in the zones of the village waste waters. During reproduction, towards the month of December, the ventral fins and the mandible turn pink. At this time, the weight of the male and female's mature gonads account for 10% and 25%, respectively, of the body weight (Ref.
35381
). Marketed fresh.
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Ferraris, C.J. Jr.
, 2003. Auchenipteridae (Driftwood catfishes). p. 470-482. 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.
37098
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
13 August 2020
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: minor commercial; bait: usually
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Zoological Record
Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01259 (0.00903 - 0.01756), b=2.89 (2.80 - 2.98), in cm total length, based on LWR estimates for this species (Ref.
93245
).
Trophic level (Ref.
69278
): 2.0 ±0.00 se; based on food items.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (17 of 100).
Price category (Ref.
80766
):
Unknown
.
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