INSTITUTO DE DIVERSIDAD Y ECOLOGIA ANIMAL
Unidad Ejecutora - UE
Caracterización del consumo de larvas de culícidos (Diptera) en dos especies de peces indígenas de la zona central de Argentina
BONIFACIO, ALEJO FABIAN; AUN, LILIANA; MARTORI, RICARDO
IHERINGIA. SÃ©RIE ZOOLOGIA
FUNDACAO ZOOBOTANICA RIO GRANDE SUL
Lugar: Porto Alegre; Año: 2014 vol. 104 p. 284 - 284
Characterization of Culicidae larvae (Diptera) consumption in two species of native fish in the central zone of Argentina.Mosquitoes represent a threat to human health and animals because they act as vectors of several diseases. Native fish species are potential candidatesto be considered for biological control populations of mosquitoes. Tests of half-hour and 24-hour consumption of Culex pipiens (Linnaeus, 1758)larvae by Cnesterodon decemmaculatus (Jenyns, 1842) and Jenynsia multidentata (Jenyns, 1842) were carried out, measuring the standard length,mouth width and weight in individuals of the two species of fishes. In both tests J. multidentata consumed more C. pipiens than C. decemmaculatus,being C. decemmaculatus female consumption higher than male consumption (and equal than both sexes of J. multidentata in the 24-hour test). Theseresults remained unchanged when making comparisons of absolute or relative consumption in the half-hour test, but when consumptions relativeto weight were compared no difference between species was found in the 24-hour test. Regression analysis between morphometric variables andweight vs. consumption rates showed low explanatory value for the half-hour test, while in the 24-hour test these variables had higher explanatoryvalue, especially for the mouth width. Finally, a half-hour test was performed over C. decemmaculatus females using C. pipiens and Aedes aegypti(Linnaeus, 1742) larvae and it showed a strong preference for the latter ones. This work allowed us to observe that there are large differences inconsumption rates of C. pipiens larvae between the fish species under study in short periods. Differences are attenuated when consumption timesare longer and may even disappear when weight is taken into account.