Classification / Names
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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Rivulinae
Etymology: kirovskyi: Named in honor of the biologist Alexandre Kirovsky, collector of most specimens of the type series..
More on author: Costa.
Environment: milieu / climate zone / depth range / distribution range
Οικολογία
; Γλυκού νερού βενθοπελαγικό. Tropical
South America: lower rio Negro drainage in Brazil.
Μέγεθος / Βάρος / Age
Maturity: Lm ? range ? - ? cm
Max length : 2.3 cm SL αρσενικό/απροσδιόριστο; (Ref. 54752); 1.7 cm SL (female)
Short description
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Μαλακές ραχιαίες ακτίνες (συνολικά) : 6 - 7; Μαλακές εδρικές ακτίνες: 9 - 10; Σπόνδυλοι: 29 - 30. Similar to Rivulus amanapira, R. atratus, R. ornatus, R. rectocaudatus, R. romeri, R. tecminae and R. uakti and differs from all other species of the genus by having a frontal squamation pattern consisting of one scale with all margins exposed just posterior to snout (vs. scale with all margins exposed near the center of median portion of frontal region) and an oblique infraorbital dark gray bar through chin (vs. never a similar color pattern). Also similar to R. atratus, R. ornatus and R. romeri and distinguished from the remaining congeners by possessing fewer anal-fin rays (8-10, vs. 11-19). Differs from R. atratus, R. ornatus and R. romeri by having a marginal dark reddish brown stripe on the caudal fin in males (vs. dark marginal stripes absent). Differs further from R. atratus and R. ornatus by the absence of dermosphenotic (vs. presence), absence of preopercular canal (vs. conspicuous short canal), and frontal scales arranged transversally (vs. circularly). Distinguished from R. romeri by having short anal fin, its tip reaching vertical through caudal peduncle (vs. long anal fin in males, tip reaching vertical through caudal-fin base), 32 scales on the longitudinal series (vs. 29-30), 16 scale rows around caudal peduncle (vs. 12) and six branchiostegal rays vs. five (Ref. 54752).
Life cycle and mating behavior
Maturities | Αναπαραγωγή | Spawnings | Egg(s) | Fecundities | Προνύμφες
Costa, W.J.E.M., 2004. Rivulus kirovskyi, a new killerfish from the central Amazon, Brazil (Cyprinodontiformes: Rivulidae). Neotrop. Ichthyol. 2(1):9-12. (Ref. 54752)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Εργαλεία
Special reports
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Διαδικτυακές πηγές
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=0.00661 (0.00311 - 0.01404), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Τροφικό Επίπεδο (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Ελαστικότητα (Ref.
120179): Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
