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Monognathus bertini
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drawing shows typical species in Monognathidae.
Teleostei (teleosts) >
Saccopharyngiformes
(Swallowers and gulpers) >
Monognathidae
(Onejaws)
Etymology:
Monognathus:
Greek, monos = one + Greek, gnathos = jaw (Ref.
45335
)
;
bertini:
Named for Leon Bertin in recognition of his pioneer contributions to the systematics of this family.
.
More on authors:
Bertelsen
&
Nielsen
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathypelagic. Deep-water
Northeast and Southeast Atlantic. Also known from the Southwest Pacific.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 10.3 cm TL male/unsexed; (Ref.
34506
)
Short description
Morphology
|
Morphometrics
Dorsal
soft rays
(total): 91-98;
Anal
soft rays
: 43 - 58.
M. bertini
differs from all other species of the genus by the great distance between anal fin origin and anus (13-19 myomeres). It is further distinguished by the following combination of characters: head short, snout relatively long, skull length 3.6-4.9% TL, rostral fang with dorsal profile slightly convex forming an almost straight line with frontal part of skull, dorsal fin origin above myomere number 5-7, pectoral fin 5.3-10.5% TL and no lateral, subdermal spots of pigmentation (Ref.
34506
).
All specimens were caught in the water column far above the bottom (Ref.
34506
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Bertelsen, E. and J.G. Nielsen
, 1987. The deep sea eel family Monognathidae (Pisces, Anguilliformes). Steenstrupia, 13(4):141-198. (Ref.
34506
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
11 October 2018
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 2.2 - 2.6, mean 2.4 °C (based on 499 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.2 ±0.40 se; based on food items.
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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Page last modified by :
mrius-barile
- 20 July 2016
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