Resumo

PEDRAZA-GARCIA, Milton J.; ORTEGA-LARA, Armando  e  IREZ, Marco CORREA-RAM. Reproductive aspects and fisheries management of the cardinal (Paracheirodon axelrodi, Characidae), relationship with the climatological pattern in the Inírida region of Colombia. Acta biol.Colomb. [online]. 2022, vol.27, n.3, pp.415-425.  Epub 13-Jun-2024. ISSN 0120-548X.  https://doi.org/10.15446/abc.v27n3.90362.

The Cardenal (Paracheirodon axelrodi) is the ornamental fish species most commercialized in Inírida region of Colombia. Structure of size and weights, reproductive periods and maturity mean length estimations were obtained from specimens collected from the local fishing activity. Records of precipitation and flow rate of the Inírida river (for the period 1972 - 2016), were used to determine the climatological pattern of the study area. A size range between 8.18 and 29.28 mm was detected, with a highest frequency of small sizes and weights registered both during February-April and August-September, suggesting a recruitment processes during these periods of the year. The Gonado-Somatic Indicator suggests increased reproductive activity concentrated in specimens over 20 mm (Lm50% = 26.3 mm) in total length; observing a main reproductive period between the months of June and July, and a secondary process at the end of the year (November). The climatological pattern of the region is characterized by a gradual process of "ascending waters" until reaching a maximum river flow (August, 5685.1 ± 966.6 m3 s-1) and rainfall (June, 518.6 ± 182. 7 mm), followed by a process of "descending waters" that reaches a seasonal minimum of the flow (890.3 ± 310.5 m3 s-1) during March after the minimum of rainfall (January, 92.8 ± 53.2 mm); This hydrological pattern seems to modulate both the dynamics of reproductive processes and the fishing exploitation of this resource. The results suggest moving towards specific closed seasons, aimed at protecting cardinal reproductive processes, and implementing a management considering minimum sizes in the capture and commercialization stages of the main ornamental fish exploited in the country.

Palavras-chave : Hydrological cycle; spawning season; structure of size; closed season; artisanal fishing.

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