TABLE 1 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection

TABLE 1 | Association of the development of hooks on anal fins with reproductive cycle in males of Brycon orbignyanus. TL = Total length; TM = Weight of specimens; PRH = Position of the rays with hooks; GSI = Gonadosomatic index; N = Number of specimens.
Reproductive PhaseN totalN with hooksPRHTL (cm)TM (g)GSIImmature2612–3º21.5 ± 3.1126.5 ± 86.50.05 ± 0.2Immature/Intersex212–3º22.5 ± 1.06135 ± 170.019 ± 0.021Regressing432–3°33 ± 6.06571 ± 2430.046 ± 0.04Regenerating612–3°31.6 ± 5.4452.2 ± 235.60.009 ± 0.009Spawning Capable/ primary male10102–15°32.5 ± 3.5726.58 ± 184.70.917 ± 0.67Spawning Capable/ secondary male222–10°21.5 ± 0.7114.28 ± 1.010.10 ± 0.10Total of specimens50