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Serrasalmus marginatus
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Serrasalmus marginatus
Picture by
Janzon, L.-A.
Teleostei (teleosts) >
Characiformes
(Characins) >
Serrasalmidae
(Piranhas and pacus) > Serrasalminae
Etymology:
Serrasalmus:
Latin, serran, serranus, saw and a fish of genus Serranus + Latin, salmo = salmon (Ref.
45335
)
.
More on author:
Valenciennes
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
South America: Paraguay-Paraná River basin.
Length at first maturity / Size / Weight / Age
Maturity: L
m
12.2
  range ? - ? cm
Max length : 27.1 cm TL male/unsexed; (Ref.
115169
); 32.4 cm TL (female); max. published weight: 440.00 g (Ref.
115169
); max. published weight: 440.00 g
Feeds mainly during the daytime, though some large fish (15-20 cm SL) extend their foraging activity to dusk (about 1800-1900H). Night is spent sheltered among vegetation. Small-sized to medium-sized fish (7-10 cm) are solitary and patrol feeding territories (3-4 square m.) in a way similar to that reported for the scale-eating
Catoprion mento
. Stalking with some use of plant cover is a frequent mode of hunting employed by
S. marginatus
. It approaches its prey with a slow, stealthy movement from behind or below. It strikes its prey on the tail or anal fin, of which a piece is clipped out with a jerking motion of the body. This clipping is audible underwater. Lurking is also employed during daytime (Ref.
9080
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Jégu, M.
, 2003. Serrasalminae (Pacus and piranhas). p. 182-196. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref.
39031
)
IUCN Red List Status (Ref.
130435
)
Not Evaluated
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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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=0.01318 (0.01065 - 0.01632), b=3.17 (3.12 - 3.22), in cm total length, based on LWR estimates for this species (Ref.
93245
).
Trophic level (Ref.
69278
): 3.6 ±0.56 se; based on food items.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (22 of 100).
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- 20 July 2016
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