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Etheostoma sagitta, Arrow darter
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drawing shows typical species in Percidae.
Teleostei (teleosts) >
Perciformes/Percoidei
(Perchs) >
Percidae
(Perches) > Etheostomatinae
Etymology:
Etheostoma:
Greek, etheo = to strain + Greek, stoma = mouth; Rafinesque said "various mouths", but Jordan and Evermann suggest the name might have been intended as "Heterostoma (Ref.
45335
)
;
sagitta:
The specific epithet
sagitta
means arrow (Ref.
10294
)
.
More on authors:
Jordan
&
Swain
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Subtropical; 38°N - 36°N
North America: upper Cumberland River drainage in Kentucky and Tennessee, USA.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 12.0 cm TL male/unsexed; (Ref.
5723
)
Short description
Morphology
|
Morphometrics
Distinguished by having the following characters: body long and slender; snout long and pointed; caudal fin base with 2 black spots partially fused into short bar; straw colored to olive above, 6-9 brown saddles; 7-9 large green Us alternate with orange bars (faint on female) along side; yellow below. Breeding males with bright orange bars on side, red-orange edge on 1st dorsal fin, bands of red -orange spots on 2nd dorsal and caudal fins, blue-green anal and pelvic fins. Lateral line usually incomplete, with 55-69 lateral scales, usually 63 or more; and 49-66 pored lateral-line scales, usually more than 52 (Ref.
86798
).
Inhabits rocky riffles and pools of headwaters, creeks and small rivers (Ref.
5723
,
10294
). Feeds on mayfly nymphs (heptageniids, baetids), blackfly and midge larvae, and lesser numbers of caddisfly, stonefly, and beetle larvae (Ref.
10294
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Page, L.M. and B.M. Burr
, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref.
5723
)
IUCN Red List Status (Ref.
130435
)
Near Threatened (NT)
; Date assessed:
19 January 2012
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=0.00537 (0.00235 - 0.01227), b=3.14 (2.94 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.5 se; based on size and trophs of closest relatives
Generation time: 1.6 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (K=0.67-0.79).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (17 of 100).
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mrius-barile
- 20 July 2016
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