EXPLORANDO CORRELACIONES ENTRE DATOS BIOMETRI-COS DE Cnesterodon decemmaculatus Y SUS INFECCIONES PARA-SITARIAS: CONOCIENDO LA ABUNDANCIA, RIQUEZA DE ESPE-CIES Y DIVERSIDAD

CROCI, YASMIN; ACOSTA ALBARRACIN,MARTIN; DE MARTINO, MACARENA SOLEDAD; BARNECHE, JORGE; MARTORELLI, S.R.; MONTES, MIGUEL MARTIN

Ciudad del Carmen

Congreso; XI Congreso Internacional de Parasitología Neotropical, IV Simposio de Ictioparasitología Neotropical, I Simposio de Leishmaniasis en el Neo-trópico, I Simposio de Fitoparasitología Neotropical y I Simposio One Health-Una Salud COPANEO 2023; 2023

In freshwater bodies of Argentina, seasonal variation in parasitism has been more studied in turtles and snails than in fish hosts. To improve the knowledge of this subject, the present study was focused on the parasitic fauna of Cnesterodon decem-maculatus (Cyprinodontiformes: Poeciliidae) from a partially protected stream. It is an ovoviviparous, omnivorous, and non-migratory fish occurring at high den-sities in subtropical reservoirs of South America. The study was conducted in Juan Blanco Stream located in The Southern Coastal Park Biosphere Reserve, Argen-tina. The stream dissipates in a wetland at the end of its route within the coastal plain of the Río de la Plata and most of the time it does not exceed the levee that separates it from it. It has a basin of 115 km2 which mostly presents extensive livestock with 14% of cultivated area and a length of approximately 29 km. A total of 238 fish were collected with cast nests for each season between winter 2018 to autumn 2019. A complete parasitological analysis of the fish was carried out with the determination of the total length (TL), and sex. Mean abundance, richness and diversity index were calculated for each sample. Changes in abundance were analyzed using the Kruskal Wallis test. Spearman´s rank correlation coefficient (rs) was calculated to determine possible correlations between the host´s total length and parasite´s abundance. We found six parasite taxa represented by: larvae of Echinostomatidae (Stephanoprora sp.) in gill filaments, larvae of Heterophyidae in gill filaments (Ascocotyle sp.1), heart arterial bulb (Ascocotyle sp.2), muscles (Ascocotyle sp.3), adults of Haploporidae (Saccocoelioides kirchneri) and adults of Neoechi-norhynchidae (Wolffhugelia matercula) in the digestive tract. The abundances of Stephanoprora sp. and S. kirchneri were different (p