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Acheilognathus microphysa
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drawing shows typical species in Acheilognathidae.
Teleostei (teleosts) >
Cypriniformes
(Carps) >
Acheilognathidae
(Bitterlings)
Etymology:
Acheilognathus:
Greek, a = without + Greek, cheilos = lip + Greek, gnathos = jaw (Ref.
45335
)
;
microphysa:
From the Greek mikros (small) and physis (air bladder), alluding to greatly reduced posterior chamber of air-bladder.
.
More on authors:
Yang
,
Chu
&
Chen
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic; depth range 1 - 10 m (Ref.
26748
). Subtropical
Asia: Yunnan, China.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 6.8 cm SL male/unsexed; (Ref.
26748
)
Short description
Morphology
|
Morphometrics
Vertebrae
: 35 - 37. Can be diagnosed by the combination of the following characters: slender body (body depth 28.22-33.90% SL) and caudal peduncle (depth of caudal peduncle 10.10-11.43% SL), large eyes (eye diameter 33.30-39.04% HL), reduced posterior chamber of air-bladder and terminal mouth (Ref.
26748
).
Found in lakes in shallow waters up to 10 m deep among dense vegetation. Feeds mainly on
Spirogyra
,
Microcystis
and Bacillariophyta (Ref.
26748
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Female has an ovipositor which is used to deposit eggs inside bivalves. Young remain in the bivalve until they can swim (Ref.
43281
).
Kottelat, M.
, 1998. Fishes of the Nam Theun and Xe Bangfai basins, Laos, with diagnoses of twenty-two new species (Teleostei: Cyprinidae, Balitoridae, Cobitidae, Coiidae and Odontobutidae). Ichthyol. Explor. Freshwat. 9(1):1-128. (Ref.
27732
)
IUCN Red List Status (Ref.
130435
)
Endangered (EN)
(B1ab(v)+2ab(v)); Date assessed:
02 November 2022
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
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=0.01000 (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
): 2.3 ±0.1 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Assuming Fec < 10,000).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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