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Enteromius pallidus, Goldie barb : fisheries, aquarium
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Enteromius pallidus
Picture by
van Zyl, P.E.
Teleostei (teleosts) >
Cypriniformes
(Carps) >
Cyprinidae
(Minnows or carps) > Smiliogastrinae
Etymology:
Enteromius:
Greek, enteron = intestine + Greek, myo, mys = muscle (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Subtropical; 24°S - 33°S
Africa: endemic to the eastern Cape Fold Ecoregion in South Africa, where it is distributed from the Krom to the Great Fish river system (Ref.
52193
,
122070
). Specimens identified as
Enteromius pallidus
from tributaries of the Orange-Vaal, Tugela, Mfolozi, Pongolo, Incomati and Limpopo rivers (Ref.
7248
,
13332
) are not related and should be treated as misidentifications (Ref.
122070
).
Length at first maturity / Size / Weight / Age
Maturity: L
m
?
, range 4 - ? cm
Max length : 7.0 cm SL male/unsexed; (Ref.
52193
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 10;
Anal
spines
: 0;
Anal
soft rays
: 8. Diagnosis:
Enteromius pallidus
can be identified by the slightly convex dorsal surface; posterior barbel 2.0 to 3.0 times the length of anterior barbel; a slightly prominent snout; an incomplete lateral line; deep translucent light brown to golden sheen with the presence of irregular and scattered spots in mature adults; and the presence of 3-7 bold spots above the lateral line in juveniles and subadults (Ref.
122070
). This species belongs to the group of
Enteromius
species in southern Africa that is characterised by a simple and flexible unbranched primary dorsal fin ray (Ref.
122070
). It is distinguished from
E. amatolicus
,
E. anoplus
,
E. annectens
,
E. toppini
and
E. radiatus
by possession of two pairs of prominent and long barbels vs. single pair and/or minute oral barbels in other species; it is distinguished from
E. lineomaculatus
,
E. viviparus
and
E. unitaeniatus
by absence of distinct chevron markings on the lateral line vs. presence of conspicuous chevron markings on the lateral line in the other three species, and from
E. bifrenatus
by absence of a distinct lateral stripe and absence of black tubular markings around lateral line pores vs. presence in
E. bifrenatus
; it is distinguished from
E. anoplus
,
E. amatolicus
,
E. annectens
,
E. unitaeniatus
,
E. bifrenatus
,
E. gurneyi
,
E. motebensis
,
E. radiatus
,
E. toppini
,
E. treurensis
and
E. viviparus
by the presence of scattered black spots on the body, particularly in juveniles vs. absence of scattered black spots in the other species (Ref.
122070
). Lateral pigmentation pattern of
E. pallidus
is closely similar to that of
E. brevipinnis
and
E. neefi
, but it is distinguished from these two species by having an incomplete lateral line vs. complete lateral line in both
E. neefi
and
E. brevipinnis
; it is further separated from
E. neefi
by absence of wavy lines along the scale rows vs. presence of conspicuous wavy lines along the scale rows in
E. neefi
, and from
E. brevipinnis
by lack of black pigmentation around the borders of the scales vs. presence of distinct black pigmentation around the scales in
E. brevipinnis
, giving a mesh-like pattern on the lateral side of the fish (Ref.
122070
).
Inhabits pools in clear, rocky streams often streams with emergent marginal vegetation (Ref.
7248
,
52193
). Spawning is likely to begin in summer, from October to November (Ref.
122070
); breeding pairs lay eggs in vegetation (Ref.
7248
,
52193
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Skelton, P.H.
, 2001. A complete guide to the freshwater fishes of southern Africa. Cape Town (South Africa): Struik Publishers, 395 p. (Ref.
52193
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
05 February 2018
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: ; aquarium: commercial
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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=0.00525 (0.00226 - 0.01220), b=3.11 (2.90 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.0 ±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).
Price category (Ref.
80766
):
Unknown
.
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- 20 July 2016
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