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Coregonus alpenae, Longjaw cisco
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Longjaw cisco
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Teleostei (teleosts) >
Salmoniformes
(Salmons) >
Salmonidae
(Salmonids) > Coregoninae
Etymology:
Coregonus:
Greek, kore = pupils of the eye + Greek, gonia = angle (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Temperate
North America: Great Lakes basin in lakes Huron and Michigan.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 45.6 cm TL male/unsexed; (Ref.
3370
); common length : 26.7 cm TL male/unsexed; (Ref.
1998
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 10-13;
Anal
spines
: 0;
Anal
soft rays
: 10 - 14;
Vertebrae
: 56 - 59. Body elongate, compressed laterally but robust. Head heavy, broad and short; eye moderate; snout broad, somewhat rounded; lower jaw heavy, usually projecting beyond the upper jaw, maxillary usually not pigmented, extending posteriorly to beyond the anterior margin of the eye. Overall coloration silvery with pink or purple iridescence, green or blue on back, silvery on sides and white below. Pigmentation on jaws and fins very light.
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Scott, W.B. and E.J. Crossman
, 1973. Freshwater fishes of Canada. Bull. Fish. Res. Board Can. 184: xi+1-966. (Ref.
1998
)
IUCN Red List Status (Ref.
130435
)
Extinct (EX)
; Date assessed:
01 August 1996
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=0.00575 (0.00329 - 0.01007), b=3.22 (3.07 - 3.37), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.3 se; based on size and trophs of closest relatives
Generation time: 8.5 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.13-0.24).
Fishing Vulnerability (Ref.
59153
): Moderate vulnerability (36 of 100).
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- 20 July 2016
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