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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Rivulinae
Etymology: kayabi: The specific name kayabi is in reference to the name of an indigenous tribe (Tupi group) formerly inhabiting a vast region of the Teles Pires drainage, Tapajós river basin, central Brazil..
More on author: Costa.
Environment: milieu / climate zone / depth range / distribution range
البيئة
; المياه العذبة قاعية التغذية و المعيشة; pH range: 5.7 - 6.0. Tropical
South America: middle and upper reaches of the Tapajós river basin in Brazil.
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 3.0 cm SL ذكر/ مختلط الجنس; (Ref. 76937); 2.9 cm SL (female)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشعة الظهرية الناعمة (المجموع) : 8 - 10; أشعه شرجية لينه: 12 - 14; فقرات: 30 - 31. Differs from all other species of the subgenus Melanorivulus by the possession of the following combination of characters: flank with red marks arranged in chevron-like pattern with vertex on the ventral part of the flank; pelvic fin usually with 6 rays, or sometimes 7 when including a rudimentary ray; scales in the longitudinal series 31-33; dorsal portion of the caudal fin in females with a horizontal series of white spots; pectoral fin with 13 rays; caudal fin with 28-31 rays; and flank in both sexes with conspicuous red bars (Ref. 76937).
Inhabits shallow portions of streams and swamps, usually about 0.10-0.30 m deep, with clear water (Ref. 76937).
Life cycle and mating behavior
Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae
Costa, W.J.E.M., 2007. Rivulus kayabi, a new killifish from the Tapajós river basin, southern Brazilian Amazon (Cyprinodontiformes: Rivulidae). Ichthyol. Explor. Freshwat. 18(4):345-350. (Ref. 76937)
IUCN Red List Status (Ref. 130435)
استخدامات بشرية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
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).
مستوى غذائي (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
المرونه (Ref.
120179): عالي, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أقل من 15 شهر (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
