Age and growth patterns of the ten spotted live-bearing fish (Cnesterodon decemmaculatus) along a polluted freshwater system.

Autor: Zambrano MJ; Instituto de Diversidad y Ecología Animal (IDEA), CONICET (Consejo Nacional de Investigaciones Científicas Y Técnicas), Córdoba, Argentina.; Facultad de Ciencias Exactas, Físicas y Naturales, Cátedra de Diversidad Biológica IV, Universidad Nacional de Córdoba, Córdoba, Argentina., Bolzán AD; Laboratorio de Citogenética y Mutagénesis, Instituto Multidisciplinario de Biología Celular (IMBICE, CICPBA-UNLP-CONICET La Plata), La Plata, Argentina.; Facultad de Ciencias Naturales y Museo, UNLP, La Plata, Argentina., Bonifacio AF; Instituto de Diversidad y Ecología Animal (IDEA), CONICET (Consejo Nacional de Investigaciones Científicas Y Técnicas), Córdoba, Argentina.; Facultad de Ciencias Exactas, Físicas y Naturales, Cátedra de Diversidad Biológica IV, Universidad Nacional de Córdoba, Córdoba, Argentina., Brito JM; Instituto de Diversidad y Ecología Animal (IDEA), CONICET (Consejo Nacional de Investigaciones Científicas Y Técnicas), Córdoba, Argentina.; Facultad de Ciencias Exactas, Físicas y Naturales, Cátedra de Diversidad Biológica IV, Universidad Nacional de Córdoba, Córdoba, Argentina., Amé MV; Facultad Ciencias Químicas, Dto. Bioquímica Clínica-CIBICI, Universidad Nacional de Córdoba-CONICET, Haya de La Torre Esq. Medina Allende, Ciudad Universitaria, Córdoba, Argentina., Hued AC; Instituto de Diversidad y Ecología Animal (IDEA), CONICET (Consejo Nacional de Investigaciones Científicas Y Técnicas), Córdoba, Argentina.; Facultad de Ciencias Exactas, Físicas y Naturales, Cátedra de Diversidad Biológica IV, Universidad Nacional de Córdoba, Córdoba, Argentina.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2024 Dec 10. Date of Electronic Publication: 2024 Dec 10.
DOI: 10.1111/jfb.16028
Abstrakt: Age and growth patterns of fish provide important information about the effects of environmental disturbances, which can be used as comparative tools in subsequent studies that attempt to assess freshwater quality. The main goal of our study was to provide information on relevant biological aspects of a native fish species used as a bioindicator in an extensive area of South America. In particular, we evaluated the age and growth patterns of Cnesterodon decemmaculatus (Poeciliidae) to establish reference species values and to compare them in different sites along an environmental quality gradient in a South American freshwater system. Water quality assessments indicated increasing environmental degradation downstream, reflecting anthropogenic impacts. The estimated ages of C. decemmaculatus along this quality gradient varied across sampling sites. The longest-lived individuals were those from the reference site, also presenting the highest average age value (almost 2 years). The best model to describe the growth in length of the individuals was the Logistic model. According to the parameters estimated from the growth curves, individuals from the most disturbed site showed slower growth although they reached greater maximum lengths than fish from the other sites. These results suggest that fish would tolerate the adverse conditions of the most altered sites, allocating their energy differentially. Our study provides valuable information on the age and growth patterns of C. decemmaculatus, a species endemic to the Neotropical region and a useful bioindicator in ecotoxicological studies.
(© 2024 Fisheries Society of the British Isles.)
Databáze: MEDLINE
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