Euryphorus brachypterus (Copepoda: Caligidae) on wild pacific bluefin tuna from the Tsugaru Strait, northern Japan.
Parasitol Int
; 65(3): 268-70, 2016 Jun.
Article
em En
| MEDLINE
| ID: mdl-26861209
ABSTRACT
Parasitic copepods infecting large scombrid fishes have been known for a long time because their hosts are economically important. Most studies, however, have focused on their morphology or their infection status in aquaculture from pathological viewpoints, and very few quantitative surveys have been conducted under conditions in the wild. This study therefore investigated the prevalence of Euryphorus brachypterus (Caligidae) in wild Pacific bluefin tuna (PBF). Results of sampling from August to September 2014 at the western area of the Tsugaru Strait, Japan showed that 13.2% of the PBF individuals (n = 1978) were infected with this copepod. The prevalence of infections was highest in larger fish but varied among landing dates, which were classified into three clusters and in all smaller fish, the prevalence of infections was zero. This suggests that E. brachypterus mainly uses the larger PBF, which becomes sources of further infections in other seas, and that at least two host populations with different infection statuses at the strait.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Atum
/
Copépodes
/
Doenças dos Peixes
Tipo de estudo:
Risk_factors_studies
Limite:
Animals
País/Região como assunto:
Asia
Idioma:
En
Revista:
Parasitol Int
Assunto da revista:
PARASITOLOGIA
Ano de publicação:
2016
Tipo de documento:
Article