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Melamphaes macrocephalus
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drawing shows typical species in Melamphaidae.
Teleostei (teleosts) >
Beryciformes
(Sawbellies) >
Melamphaidae
(Bigscale fishes or ridgeheads)
Etymology:
Melamphaes:
Greek, melan, -anos = black + Greek, amphi = both side (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathypelagic; depth range 62 - 500 m (Ref.
51657
). Deep-water; 30°N - 23°S, 120°W - 130°W (Ref.
87970
)
Eastern Pacific Ocean: tropical, endemic to ETP, from the California coast (ca. 30°N) down to northern Chilean coast (ca. 23°S).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 12.8 cm SL male/unsexed; (Ref.
87970
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 3;
Dorsal
soft rays
(total): 13-16;
Anal
spines
: 1;
Anal
soft rays
: 8;
Vertebrae
: 27 - 28. The species is characterized by the following: large head (more than 40% of SL, specimens of SL ? 100.0 mm); first gill arch with 20-22 rakers; total vertebrae 26-28, 11 abdominal; haemal arch of the first caudal vertebra is without a spur; D III,13-16; P14-15; ventral fin with 7 soft rays; ventral fin starts before the vertical line of the posterior margin of the pectoral fin basement; anal fin starts under the vertical line of the 3-4 ray of the dorsal fin (posterior end); operculum with 4 scales (Ref.
87970
).
Adults caught below 400-500 meters; juveniles in shallower water (Ref.
51657
). Specimens were sampled by open-mouth nets at depth range of 1500-0 m; the minimal sampling depth was 62 m (individuals with SL = 12.7-13.3 mm) (Ref.
87970
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Kotlyar, A.N.
, 2011. Revision of genus
Melamphaes
(Melamphaidae). II. Multi-raker species:
M. polylepis
,
M. falsidicus
sp. nova,
M. pachystomus
sp. nova,
M. macrocephalus
,
M. leprus
. J. Ichthyol. 51(8):658-661. (Ref.
87970
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
30 December 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 12.1 - 14.8, mean 13.2 °C (based on 26 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00451 - 0.02668), b=3.10 (2.89 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.7 ±0.2 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).
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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