Larval trematodes Paronatrema mantae and Copiatestes sp. parasitize Gulf of California krill (Nyctiphanes simplex, Nematoscelis difficilis).
Dis Aquat Organ
; 116(1): 23-35, 2015 Sep 17.
Article
em En
| MEDLINE
| ID: mdl-26378405
During 4 quantitative-systematic oceanographic cruises at 99 sampling stations in the Gulf of California (January and July 2007, August 2012, and June 2013), we found 2 trematode species (non-encysted mesocercaria stage) parasitizing the hemocoel of 2 krill species at near-shore locations. Copiatestes sp. parasitized Nematoscelis difficilis in January 2007, and Paronatrema mantae parasitized Nyctiphanes simplex in July 2007. Both trematode species had an intensity of 1 parasite per host. This is the first endoparasite known for N. difficilis, the first record of P. mantae infecting zooplankton, and the first confirmed trematode parasitizing krill species in the Gulf of California. We provide quantitative evidence that these 2 trematode species infect krill with considerably low station prevalence (0.03-0.16%) and low population abundances (<1.2 trematodes 1000 m(-3)). A review of trematodes parasitizing krill indicates that syncoeliid trematodes also have (with few exceptions) low population densities and prevalence and lower species diversity than previously thought (suggesting a broader zoogeographic distribution range of these parasites). Due to the low host specificity of syncoeliid trematodes that typically infect more than 1 secondary intermediate host species in their complex life cycle, we propose that N. simplex and N. difficilis are intermediate hosts (although non-conspicuous) for the transmission of syncoeliid trematodes in the Gulf of California.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Trematódeos
/
Euphausiacea
Tipo de estudo:
Risk_factors_studies
Limite:
Animals
País/Região como assunto:
Mexico
Idioma:
En
Revista:
Dis Aquat Organ
Assunto da revista:
BIOLOGIA
/
MEDICINA VETERINARIA
/
MICROBIOLOGIA
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
México
País de publicação:
Alemanha