Occurrence of Neoechinorhynchus curemai (Acanthocephala: Neoechinorhynchidae) in Prochilodus nigricans (Characiformes: Prochilodontidae), in southwestern Amazon
| Autor: | Dionatas Ulises de Oliveira Meneguetti, Luciano Negreiros, Luís Marcelo Aranha Camargo, Ricardo Massato Takemoto, Lucena Rocha Virgilio, Fabricia da Silva Lima |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
biology
QH301-705.5 Prochilodontidae Amazon rainforest Zoology Characiformes biology.organism_classification Microbiology QR1-502 General Biochemistry Genetics and Molecular Biology condition factor endoparasite host parasite length-weight population upper Juruá river Neoechinorhynchidae Prochilodus nigricans Biology (General) General Agricultural and Biological Sciences Acanthocephala |
| Zdroj: | Acta Scientiarum. Biological Sciences; Vol 43 (2021): Publicação contínua; e57163 Acta Scientiarum. Biological Sciences; v. 43 (2021): Publicação contínua; e57163 Acta Scientiarum Biological Sciences Universidade Estadual de Maringá (UEM) instacron:UEM Acta Scientiarum : Biological Sciences, Vol 43, Iss 1 (2021) |
| ISSN: | 1807-863X 1679-9283 |
| Popis: | Prochilodus nigricans is extensively exploited in fishing and aquaculture activities in the Brazilian Amazon, it is the definitive host for Neoechinorhynchus curemai Noronha, 1973. Thus, the present study aimed to evaluate the occurrence of N. curemai in P. nigricans and the parasite-host relationship in three rivers (Juruá, Crôa and Môa) in the municipality of Cruzeiro do Sul, state of Acre, Brazil. Fish were caught, weighed, measured, and subjected to necropsy, and the gastrointestinal tract and viscera were analyzed. A total of 178 specimens of N. curemai were found in 61 infected fish, with the (p= 58.62%). The prevalence, mean intensity, and mean abundance were higher in hosts from the Môa River, and lower from the Juruá River. Regarding the length-weight relationship, the b-value did not differ statistically from three (b=3) for fish species in the three locations, nor in parasitized and non-parasitized species. In addition, growth was considered isometric, and in the case of the relative condition factor, there was no difference in fish hosts between the three rivers. The correlation between parasite intensity, condition factor, length, and weight of P. nigricans was not significant. Thus, this parasite infestation varied between the habitats. However, this did not influence the growth and development of the hosts. Prochilodus nigricans is extensively exploited in fishing and aquaculture activities in the Brazilian Amazon, it is the definitive host for Neoechinorhynchus curemai Noronha, 1973. Thus, the present study aimed to evaluate the occurrence of N. curemai in P. nigricans and the parasite-host relationship in three rivers (Juruá, Crôa and Môa) in the municipality of Cruzeiro do Sul, state of Acre, Brazil. Fish were caught, weighed, measured, and subjected to necropsy, and the gastrointestinal tract and viscera were analyzed. A total of 178 specimens of N. curemai were found in 61 infected fish, with the (p= 58.62%). The prevalence, mean intensity, and mean abundance were higher in hosts from the Môa River, and lower from the Juruá River. Regarding the length-weight relationship, the b-value did not differ statistically from three (b=3) for fish species in the three locations, nor in parasitized and non-parasitized species. In addition, growth was considered isometric, and in the case of the relative condition factor, there was no difference in fish hosts between the three rivers. The correlation between parasite intensity, condition factor, length, and weight of P. nigricans was not significant. Thus, this parasite infestation varied between the habitats. However, this did not influence the growth and development of the hosts. |
| Databáze: | OpenAIRE |
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