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Teleostei (teleosts) >
Cyprinodontiformes
(Rivulines, killifishes and live bearers) >
Rivulidae
(Rivulines) > Rivulinae
Etymology:
Trigonectes:
Greek, trygon = a sting ray + Greek, nekton = swimmer (Ref.
45335
)
;
rubromarginatus:
From the Latin ruber (red) and marginatus (with margin), referring to the red stripe along the ventral margin of the caudal fin (Ref.
26656
)
.
More on author:
Costa
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Dorsal
soft rays
(total): 10-14;
Anal
soft rays
: 16 - 18. Distinguished from other species of the genus, except
T. strigabundus
, by having straight mouth cleft. Differs from
T. strigabundus
and all other species of the genus by the elongated pelvic fin of the males, whose tip is reaching to the base of 11th to 15th anal rays and the presence of a bright red stripe along the ventral margin of the male caudal fin. Seems to differ from
T. strigabundus
by having a larger size (Ref.
26656
).
Costa, W.J.E.M.
, 1990. Systematics and distribution of the neotropical annual fish genus
Trigonectes
(Cyprinodontiformes, Rivulidae), with description of two new species. Ichthyol. Explor. Freshwat. 1(2):135-150. (Ref.
26656
)
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00315 - 0.03034), b=3.03 (2.78 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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- 20 July 2016
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