Morphometry of Dawestrema cycloancistrium (Dactylogyridae: monogenoidea) collected from Arapaima gigas (Schinz, 1822) “Paiche” (Osteoglossiformes: Arapaimidae) from fish ponds, Loreto-Peru
DOI:
https://doi.org/10.51252/raa.v3i2.508Keywords:
Peruvian Amazon, mortality, parasites, prevalenceAbstract
In the Peruvian Amazon, the study on fish parasitism is little addressed, so it is unknown about the parasites that each fish (ornamental or for consumption) may have, much less about the morphological characteristics and their measurements in particular. The objective of this research work is to morphometrically characterize the monogenoid Dawestrema cycloancistrium collected from moribund specimens of Arapaima gigas from fish ponds on the Iquitos - Nauta highway. The gills of 3 moribund specimens of A. gigas from fish ponds were analyzed, in which a total of 993 parasitic individuals were found with the help of a stereoscope, which were identified as the species Dawestrema cycloancistrium (Monogenoidea: Dactylogyridae), with the aid of Hoyer's clarifying medium and light microscope; at the end of the identification, photos of the characteristic structures that facilitate the identification of D. cycloancistrium were taken; The data obtained were saved in Excel sheets, which allowed calculating the parasite indices of the fish analyzed. The present work concludes that Dawestrema cycloancistrium is a large monogenean parasite based on the morphometric measurements made in the present investigation.
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