Hydropower effects on Prochilodus magdalenae (Prochilodontidae) reproduction: evidence from endocrine response

Revista MVZ Córdoba

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Title Hydropower effects on Prochilodus magdalenae (Prochilodontidae) reproduction: evidence from endocrine response
Efectos de la generación de energía hidroeléctrica en la reproducción de Prochilodus magdalenae (Prochilodontidae): evidencia de la respuesta endocrina
Creator De Fex-Wolf, Daniela
López-Casas, Silvia
Jiménez-Segura, Luz Fernanda
Description Objective. Describe the endocrine response associated with the reproduction of a tropical potamodromous fish under changes in the flow discharge produced by hydropower in an Andean. Materials and methods. We analyzed Prochilodus magdalenae reproduction in individuals from two sectors of a Neotropical river basin: one with the natural flow and the other with a regulated hydrological regime. Results. In the sector of the basin with the natural flow we found that the production of hormones related with fish reproduction (FSH and LH) was correlated with the gonadosomatic index, while in fish experiencing hydropeaking due to hydroelectric operation no such correlation was detected. Conclusions. Hormone production associated to reproduction of the Potamodromous fish was sensitive to changes in water level and discharge. Then, fish exposed to hydropeaking would be receiving ambiguous stimuli that affect hormone production, reproduction synchronization with environmental cues, and ripening, which are essential for reproductive success.
Objetivo. Describir la respuesta endocrina asociada con la reproducción de un pez potamódromo tropical ante cambios en el régimen de descarga de caudal producido por la generación de hidro-energía en un río Andino. Materiales y métodos. Se analizó la reproducción de Prochilodus magdalenae en individuos de dos sectores de una cuenca neotropical: uno con flujo hidrológico natural y otro con un régimen regulado. Resultados. En la sección de la cuenca con flujo natural, se encontró que la producción de hormonas relacionadas con la reproducción de peces (FSH y LH) estaba correlacionada con el índice gonadosomático, mientras que en peces bajo la influencia del pulso de agua producto de la operación hidroeléctrica esta correlación no fue detectada. Conclusiones. La producción de hormonas asociadas con la reproducción en peces potamódromos fue sensible a cambios en el nivel/caudal. En consecuencia, peces expuestos a las alteraciones en el pulso de caudal estarían recibiendo estímulos ambiguos que afectan la producción de hormonas, la sincronización de la reproducción con las señales ambientales y la maduración, lo cual es esencial para el éxito reproductivo.
Publisher Universidad de Córdoba
Date 2019-04-07
Type info:eu-repo/semantics/article
Format application/pdf
Identifier https://revistamvz.unicordoba.edu.co/article/view/1606
Source Journal MVZ Cordoba; Vol 24 No 2 (2019): Revista MVZ Córdoba Volumen 24(2) Mayo-Agosto 2019; 7180-7187
Revista MVZ Córdoba; Vol. 24 Núm. 2 (2019): Revista MVZ Córdoba Volumen 24(2) Mayo-Agosto 2019; 7180-7187
Language spa
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Rights https://creativecommons.org/licenses/by-nc-nd/4.0/

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