Multiparasitism in gills of Metynnis lippincottianus from the environmental protection area of Curiaú river, Eastern Amazon

Abthyllane Amaral De Carvalho,Marcela Nunes Videira,Roger Leomar Da Silva Ferreira,Priscila Gomes De Araújo,Márcio Charles Da Silva Negrão

doi:10.1590/0103-8478cr20190028

Abthyllane Amaral De Carvalho, Marcela Nunes Videira + Show 3 more

Open Access

https://doi.org/10.1590/0103-8478cr20190028

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Abstract

ABSTRACT: The high fish diversity of the Amazon has been the subject of study for several research projects because of the importance of its ecosystems. The Environmental Protection Area of the Curiaú River is composed of permanent and temporary lakes within the floodplain forests, favoring a rich diversity of fish species. Pratinha. (Metynnis lippincottianus) is an ornamental fish, widely distributed throughout Brazil and French Guiana. Fish parasites may reflect the environmental quality, as well as the habits of their host. Considering the importance of understanding and contributing to the expansion of studies on fish parasites, the present study aimed to investigate the gills of Metynnis lippincottianus from the Curiaú River basin in the municipality of Macapá (Eastern Amazon). A total of 200 specimens of Metynnis lippincottianus from the Curiaú River were examined and 89% of the analyzed fish were parasitized by metacercariae, Dactylogyridae gen. sp., Piscinoodinium pillulare, Trichodina sp., Henneguya sp., and Myxobolus sp. Despite this high parasitic load, body conditions were not affected. This is the first documented incidence of a species belonging to the Phylum Cnidaria: Myxozoa in Metynnis lippincottianus.

Highlights

The high ichthyological diversity of Amazon has been a subject of study for researchers (TAVARES et al, 2018; DE ANDRADE et al, 2018; ZATTI et al, 2018; BITTENCOURT et al, 2014), but still many issues are need to be studied and understood. (MOREIRA et al, 2010)
The 200 specimens of M. lippincottianus examined from the Curiaú River, had a mean total length of 7.77±0.78 cm; standard mean length of 6.21±0.64 cm; and mean weight of 9.17±2.82 g
Cnidarian Henneguya sp. presented the highest prevalence (89%) among the parasites reported in gills; metacercariae showed the lowest prevalence (15%)

Summary

Introduction

The high ichthyological diversity of Amazon has been a subject of study for researchers (TAVARES et al, 2018; DE ANDRADE et al, 2018; ZATTI et al, 2018; BITTENCOURT et al, 2014), but still many issues are need to be studied and understood. (MOREIRA et al, 2010). In the state of Amapá, floodplain forests are the second largest ecosystem in the state, occupy 4.8% of the territory while the rainforest occupies approximately 70% of the state of the Amapá. Since this area is a suitable habitat for many native species A species of ornamental importance, Metynnis lippincottianus (Serrasalmidae) known popularly as Pratinha is widely distributed in the Brazilian basins and some French Guiana rivers It has a diet based on vegetables, seeds, phytoplankton, mollusks and some arthropods and detritus (MOREIRA et al, 2009; HOSHINO et al, 2014)

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