Se presenta la biodiversidad parasitaria de Paralabrax clathratus (Girard, 1854) y P. humeralis (Valenciennes, 1828) (Pisces: Serranidae) del Pacífico Oriental, su especificidad hospedatoria y el papel que desempeñan en el ciclo de vida de los parásitos. La información es una compilación de los registros de diversos autores durante la revisión de los parásitos de los peces estudiados. Se encontró que la biodiversidad parasitaria de ambas especies de peces está agrupada en 22 familias (entre helmintos y crustáceos), dos órdenes y una clase. Paralabrax humeralis presenta mayor riqueza parasitaria que P. clathratus (n = 40 vs n = 27): monogeneos (n = 3 vs n = 3), digéneos (n = 10 vs n = 10), céstodos (n = 6 vs n = 1), acantocéfalos (n = 2 vs n = 1), nemátodos (n = 9 vs n = 4), copépodos (n = 8 vs n = 8), isópodos (n = 1 vs n = 0) e hirudineos (n = 1 vs n = 0). De esta rique...

In the Bay and Ensenada de La Paz there is a strong variability in the composition and abundance ofpelagic copepod species but there is no information on parasitic infection level. The early stages oftrematode is unclear because they use jellyfish, ctenophores, molluscs, chaetognaths, copepods and fish larvae as first and second intermediate hosts.The aim of this work was to study the parasitic helminths in calanoid copepods in the Ensenada de la Paz, Baja California Sur, Mexico. Zooplankton was obtainedwith a conical net of 1.5 m in length, mesh size of 300 microns and a digital flowmeter. Net tows weremade in sea surface for 5 min at 0,2 knots/h at a fixed station sampling during the last week of June 2008.Samples were fixed in formalin 4%. Copepods with parasites were sorted and identified. The extractedworms were stained with Gomori Trichome, cleared with methyl salicylate and mounte...

Paranthias colonus(Valenciennes, 1846) is used as fish bait replacing first class fish that have been overfished in the Gulf of California. Due to its recent commercial importance, the parasite fauna of P. colonusfrom of El Sargento, Baja California Sur, Mexico is characterized to define its role in the life cycle of its parasites. 30 fishes were fixed in 4% formaldehyde for later examination. Helminths and copepods were treated with conventional techniques specific to each kind of parasite. P. colonushad 100% prevalence and 46.5 mean intensity of parasites. Adults of Pseudorhabdosynochus sp., Prodistomum orientalis, Brachyphallus sp., Lecithochirium sp., Spinitectus sp., Caligus sp., Pandaridae, and Hatschekia sp. and larevae of Tetragonocephalidae, Scolex pleuronectis and Anisakis sp. were found. There was evidence of host specificity of Pseudorhabdosynochussp. and Hatschekiasp. by ser...