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Atractosteus spatula, Alligator gar : fisheries, gamefish, aquarium
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Atractosteus spatula
Picture by
Ramani Shirantha
Holostei (gars and bowfins) >
Lepisosteiformes
(Gars) >
Lepisosteidae
(Gars)
Etymology:
Atractosteus:
Greek, atraktos, arrow + Greek, osteon = bone (Ref.
45335
)
;
spatula:
Atractosteus
meaning spindle bone, and
spatula
in reference to the broad, elongated snout (Ref.
79012
)
.
More on author:
Lacepède
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; brackish; demersal; depth range 0 - ? m (Ref.
55223
). Subtropical; 44°N - 20°N, 101°W - 82°W (Ref.
55223
)
North America: ranges from Mississippi River basin from southwestern Ohio and southern Illinois in USA south to Gulf of Mexico; Gulf of Mexico Coastal Plain from Enconfina River in Florida, USA to Veracruz, Mexico.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 305 cm OT male/unsexed; (Ref.
3221
); common length : 200 cm TL male/unsexed; (Ref.
3728
); max. published weight: 137.0 kg (Ref.
58490
)
Large size and broad, short snout. Light dorsal stripe. Dark olivaceous brown above and white to yellowish beneath. Dark brown blotches on all fins (Ref.
37032
).
Facultative air-breathing (Ref.
126274
); Adults inhabit sluggish pools and backwaters of large rivers, swamps, bayous, and lakes. Rarely enter brackish and marine waters (Ref.
5723
). Feed on blue crabs, turtles, waterfowl or other birds and small mammals (Ref.
10294
). Giant of the gars (Ref.
5723
). Marketed fresh (Ref.
37032
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Etnier, D.A. and W.C. Starnes
, 1993. The fishes of Tennessee. The University of Tennessee Press, Knoxville, Tennessee, USA. (pls. check date). (Ref.
10294
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
14 November 2018
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: minor commercial; gamefish: yes; aquarium: public aquariums
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.6406 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00121 - 0.00751), b=3.18 (2.96 - 3.40), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 4.0 ±0.67 se; based on food items.
Resilience (Ref.
120179
): Very Low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Very high vulnerability (90 of 100).
Price category (Ref.
80766
):
Unknown
.
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- 20 July 2016
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