Seasonal occurrence and variation of ectoparasites in Nile tilapia (Oreochromis niloticus) in the Federal District, Brazil
The present study assesses the diversity and seasonal variation of parasites in Oreochromis niloticus (Nile tilapia) cultivated in excavated tanks in the Federal District, Brazil. A total of 120 specimens of O. niloticus were collected in 12 monthly collections. Water quality parameters were checke...
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Maringá
2022-03-01
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| Series: | Acta Scientiarum: Biological Sciences |
| Subjects: | |
| Online Access: | https://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/56963 |
| _version_ | 1811329704664236032 |
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| author | Marcela Tosta Ribeiro Bruna Maria da Silva Caldas Gino Chaves da Rocha Angela Patricia Santana Rodrigo Diana Navarro |
| author_facet | Marcela Tosta Ribeiro Bruna Maria da Silva Caldas Gino Chaves da Rocha Angela Patricia Santana Rodrigo Diana Navarro |
| author_sort | Marcela Tosta Ribeiro |
| collection | DOAJ |
| description |
The present study assesses the diversity and seasonal variation of parasites in Oreochromis niloticus (Nile tilapia) cultivated in excavated tanks in the Federal District, Brazil. A total of 120 specimens of O. niloticus were collected in 12 monthly collections. Water quality parameters were checked at all tanks. The animals, sacrificed by immersion into anesthetic solution, had the gills scraped, in which the mucus was analyzed under an optical microscope. Parasitological examination showed Trichodina sp., Epistylis sp., Ichthyophthirius multifiliis, and Monogenea helminths in the fish gills. We found statistically significant differences between Monogenea parasites collected in the fall and winter and between I. multifiliis protozoans collected in fall-winter and winter-summer periods. Except for Epistylis sp., all parasites showed abundance peaks in O. niloticus specimens collected during the winter, which may characterize the seasonality of these parasites in the Federal District region. Monogenea helminths were the most prevalent among the parasites found, with the highest prevalence during the fall. The mean abundance of parasites was similar between the fall and winter. However, the abundance of monogenetic trematodes was higher between the winter and summer. I. multifiliis showed significant variation between fall-winter and winter-summer periods.
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| first_indexed | 2024-04-13T15:48:39Z |
| format | Article |
| id | doaj.art-7561738eb68941deac920e07402e053b |
| institution | Directory Open Access Journal |
| issn | 1679-9283 1807-863X |
| language | English |
| last_indexed | 2024-04-13T15:48:39Z |
| publishDate | 2022-03-01 |
| publisher | Universidade Estadual de Maringá |
| record_format | Article |
| series | Acta Scientiarum: Biological Sciences |
| spelling | doaj.art-7561738eb68941deac920e07402e053b2022-12-22T02:40:54ZengUniversidade Estadual de MaringáActa Scientiarum: Biological Sciences1679-92831807-863X2022-03-0144110.4025/actascibiolsci.v44i1.56963Seasonal occurrence and variation of ectoparasites in Nile tilapia (Oreochromis niloticus) in the Federal District, BrazilMarcela Tosta Ribeiro0Bruna Maria da Silva Caldas1Gino Chaves da Rocha2Angela Patricia Santana3Rodrigo Diana Navarro4Universidade de BrasíliaUniversidade de BrasíliaUniversidade de BrasíliaUniversidade de BrasíliaUniversidade de Brasília The present study assesses the diversity and seasonal variation of parasites in Oreochromis niloticus (Nile tilapia) cultivated in excavated tanks in the Federal District, Brazil. A total of 120 specimens of O. niloticus were collected in 12 monthly collections. Water quality parameters were checked at all tanks. The animals, sacrificed by immersion into anesthetic solution, had the gills scraped, in which the mucus was analyzed under an optical microscope. Parasitological examination showed Trichodina sp., Epistylis sp., Ichthyophthirius multifiliis, and Monogenea helminths in the fish gills. We found statistically significant differences between Monogenea parasites collected in the fall and winter and between I. multifiliis protozoans collected in fall-winter and winter-summer periods. Except for Epistylis sp., all parasites showed abundance peaks in O. niloticus specimens collected during the winter, which may characterize the seasonality of these parasites in the Federal District region. Monogenea helminths were the most prevalent among the parasites found, with the highest prevalence during the fall. The mean abundance of parasites was similar between the fall and winter. However, the abundance of monogenetic trematodes was higher between the winter and summer. I. multifiliis showed significant variation between fall-winter and winter-summer periods. https://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/56963parasite infestation; helminths; protozoans; fish farming; Brazil. |
| spellingShingle | Marcela Tosta Ribeiro Bruna Maria da Silva Caldas Gino Chaves da Rocha Angela Patricia Santana Rodrigo Diana Navarro Seasonal occurrence and variation of ectoparasites in Nile tilapia (Oreochromis niloticus) in the Federal District, Brazil Acta Scientiarum: Biological Sciences parasite infestation; helminths; protozoans; fish farming; Brazil. |
| title | Seasonal occurrence and variation of ectoparasites in Nile tilapia (Oreochromis niloticus) in the Federal District, Brazil |
| title_full | Seasonal occurrence and variation of ectoparasites in Nile tilapia (Oreochromis niloticus) in the Federal District, Brazil |
| title_fullStr | Seasonal occurrence and variation of ectoparasites in Nile tilapia (Oreochromis niloticus) in the Federal District, Brazil |
| title_full_unstemmed | Seasonal occurrence and variation of ectoparasites in Nile tilapia (Oreochromis niloticus) in the Federal District, Brazil |
| title_short | Seasonal occurrence and variation of ectoparasites in Nile tilapia (Oreochromis niloticus) in the Federal District, Brazil |
| title_sort | seasonal occurrence and variation of ectoparasites in nile tilapia oreochromis niloticus in the federal district brazil |
| topic | parasite infestation; helminths; protozoans; fish farming; Brazil. |
| url | https://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/56963 |
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