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1.
J Helminthol ; 88(3): 342-8, 2014 Sep.
Article in English | MEDLINE | ID: mdl-23628163

ABSTRACT

The development of cage fish farms has been associated with an increase in parasitic diseases. Organic matter resulting from feed waste and faeces attracts animals such as birds and invertebrates that can act as hosts for parasites. The aim of this study was to evaluate the influence of cage farming on Austrodiplostomum compactum metacercariae infections of Plagioscion squamosissimus collected close to a cage farm in the Chavantes reservoir (Paranapanema River). Thirty-seven fish were collected in an area close to cages (CF), and 28 in an area not influenced by cages (CT). All specimens were weighed, measured and the eyes removed for morphological analyses of metacercariae. The prevalence, mean intensity of infection, mean abundance and condition factor were calculated. The prevalence (CF = 86.4%, CT = 57.1%), mean infection intensity (CF = 20.31 ± 1.13, CT = 4.29 ± 7.14) and mean abundance (CF = 17.70 ± 6.27, CT = 2.35 ± 0.77) were higher in the CF (P< 0.05) group. There were no significant correlations (P> 0.05) between the mean abundance and standard length or the total weight and condition factor in either group (P> 0.05). Fish farms may interfere with the life cycle of A. compactum, leading to more infections with P. squamosissimus. This could be due to an increase in the number of host animals that are attracted by the availability of food resources derived from fish farms.


Subject(s)
Aquaculture/methods , Fish Diseases/epidemiology , Metacercariae/isolation & purification , Perciformes , Trematoda/isolation & purification , Trematode Infections/veterinary , Animals , Brazil , Fish Diseases/parasitology , Parasite Load , Prevalence , Trematode Infections/epidemiology , Trematode Infections/parasitology
2.
Arq. bras. med. vet. zootec ; Arq. bras. med. vet. zootec. (Online);58(6): 1229-1231, dez. 2006. ilus
Article in English | LILACS | ID: lil-455073

ABSTRACT

Relata-se a ocorrência de metacercárias de Diplostomum compactum (Trematoda: Diplostomidae) infectando Geophagus brasiliensis (Teleostei: Cichlidae) do reservatório de Barra Bonita, rio Tietê, estado de São Paulo, Brasil. As metacercárias foram coletadas no globo ocular, fixadas em solução de AFA e coradas com carmim. As análises morfológicas e morfométricas de cinco espécimes foram realizadas por meio do sistema computadorizado de analise de imagem. Este foi o primeiro registro da ocorrência desse parasito no reservatório de Barra Bonita e também o primeiro registro em acará Geophagus brasiliensis.


Subject(s)
Epidemiology , Perciformes/anatomy & histology , Image Processing, Computer-Assisted/methods , Trematoda/isolation & purification
3.
Arq. bras. med. vet. zootec ; 58(6): 1229-1231, dez. 2006. ilus
Article in English | VETINDEX | ID: vti-7341

ABSTRACT

Relata-se a ocorrência de metacercárias de Diplostomum compactum (Trematoda: Diplostomidae) infectando Geophagus brasiliensis (Teleostei: Cichlidae) do reservatório de Barra Bonita, rio Tietê, estado de São Paulo, Brasil. As metacercárias foram coletadas no globo ocular, fixadas em solução de AFA e coradas com carmim. As análises morfológicas e morfométricas de cinco espécimes foram realizadas por meio do sistema computadorizado de analise de imagem. Este foi o primeiro registro da ocorrência desse parasito no reservatório de Barra Bonita e também o primeiro registro em acará Geophagus brasiliensis.(AU)


Subject(s)
Trematoda/isolation & purification , Epidemiology , Perciformes/anatomy & histology , Image Processing, Computer-Assisted/methods
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