Metazoários parasitos de Astronotus ocellatus (Agassiz, 1831) e Astronotus crassipinnis (Heckel, 1840) (Perciformes: Cichlidae) em lagos de várzea na Amazônia, Amazonas, Brasil
Forty-nine specimens of the genus Astronotus were collected: 25 Astronotus ocellatus and 24 A. crassipinnis during the months of March (flood season), June (full season), September (low water season) and December (dry season) of 2012, in six floodplain lakes (five from the Solimões river and one...
| Autor principal: | Atroch, Fernando Márcio Paes Barreto |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/11367 http://lattes.cnpq.br/6868117588379706 |
| Resumo: |
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Forty-nine specimens of the genus Astronotus were collected: 25 Astronotus ocellatus and 24
A. crassipinnis during the months of March (flood season), June (full season), September (low
water season) and December (dry season) of 2012, in six floodplain lakes (five from the
Solimões river and one from the Purus river): Baixio, Preto, São Tomé, Ananá, Araçá and
Maracá. The individuals of A. ocellatus showed an average standard length of 18.2 cm and
average weight of 234.4 g. Individuals of A. crassipinnis showed 16.6 cm average length and
an average weight of 182.7 g. All hosts analyzed were parasitized by at least one parasite
species. The parasitic fauna of A. ocellatus increased from 19 to 25 species with 15 new
occurrences and 3082 parasites collected: 1098 specimens of Monogenoidea; 145 Digenea;
1800 Nematoda; 20 Copepoda; 7 Branchiura and 12 Pentastomida. For A. crassipinnis were
registered 11 new occurrences and 2539 parasites were collected: 1318 Monogenoidea; 107
Digenea; 1090 Nematoda; 9 Copepoda; 11 Branchiura and 4 Pentastomida. The new records
for A. ocellatus were the Monogenoidea species: Sciadicleithrum sp.; Tereancistrum sp.;
Urocleidoides eremitus and U. paradoxus; Digenea: metacercaria Diplostomidae;
Glaphyrostomum sp.; Crassicutis cichlasomae. Nematoda: Pseudoproleptus sp.;
Brevimulticaecum sp.; Pseudocapillaria sp. and Spiroxys sp. Copepoda: Ergasilus sp. and
Therodamas elongatus; Branchiura: Argulus multicolor; Pentastomida: Subtriquetra sp.. For
A. crassipinnis except the Monogenoidea species: Gussevia asota, G. astronoti and G.
rogersi, all other species were new records. The species with the highest prevalence in A.
ocellatus was Gussevia asota (Monogenoidea) (P = 60%) and for A. crassipinnis was G.
rogersi (Monogenoidea) (P = 79.12%). Brevimulticaecum sp. (Nematoda) was the most
dominant species for the infracommunities in both hosts. The similarity of the host
infracommunities was 67%. Astronotus ocellatus and A. crassipinnis are direct and indirect
responsible for the upkeep of 26 parasite species, acting as definitive, intermediate or
paratenic hosts. All metazoan parasites registered were larval forms except the
Monogenoidea, Copepoda species and the Nematoda Procamallanus (Spirocamallanus)
inopinatus. |