Occurrence of parasites of the freshwater mugilid fish Liza abu (Heckel) from Basrah, southern Iraq

Abstract

In monthly samples of Liza abucollected November 1981-October 1982 from Mehaijerdn Creek, a western branch of Shalt-Al-Arab river south of Basrah, fishes were infected with the third larval stage of the nematode Contracaecum sp., the acanthocephalan Neoechinorhynchus agilis and the gill crustacean Ergasilus rno.ru/ensi.r.Generdlly, the changes in the percentagc prevalence coincided with the changes in the mean intensity of infection. There were no significant differences between the infection of male and female fishes in the cases of the monthly variations of infection with Contracaecum sp. and of infection with both Contracaecum sp. and E. mosulmsis, according to fish length, but in other cases more female fishes were infected than males.Infection with Contracaecum sp. decreased gradually in the larger fishes. In the case of both N . agilis and E. rnosulensis, the infection at first increased with increase in fish length but decreased in larger fishes.Infection with Conrracaecum sp. occurred only during May-August and disappeared during September. The peak for N. agilis was in April, and it disappeared during summer. Infection with E. riiosulensis disappeared during winter months.

Determination of the infection densities of mudfish <i>Eustrongylides</i> in <i>Clarias gariepinus</i> and <i>C. anguillaris</i> from Bida floodplain of Nigeria

“…This observation agreed well with the findings of Mhaisen et al (1988) that female fishes were generally more liable than males to infections with cestode, nematode, acanthocephalan, crustacean and copepod parasites. The mean prevalence, intensity and abundance of Eustrongylides africanus larvae in Clarias for the dry season is higher than the wet season of the year.…”

Prevalence of Internal Parasitic Helminthes Infected Oreochromis niloticus (Nile Tilapia), Clarias gariepinus (African Catfish) and Cyprinus carpio (Common Carp) in Lake Lugo (Hayke), Northeast Ethiopia

“…The difference between sexes was not statistically significant, but the prevalence was a bit higher in females (48.31%) than males (47.4%). This observation correspond to the findings of Imam and Dewu [19], Bichi and Ibrahim [20] and Mhaisen et al [24], that stated female fishes were generally more liable than males to infestations with cestodes, nematodes and trematodes. This could be due to the difference of their physiological condition of the females especially gravids ones [25] which could have had reduced resistance to infection by the parasites [26].…”

Temporal and spatial variations in the metazoan parasite communities of the Panama spadefish,Parapsettus panamensis(Pisces: Ephippidae), from the Pacific coast of Mexico

“…These parasite communities exhibit temporal and spatial structural changes in response to seasonal and local variations in several biotic and abiotic environmental factors; these variations can be reflected in parasite species composition and infection levels over time (Fiorillo & Font, ; Zander, , , ; Zander & Kesting, ; Zander, Reimer, & Barz, ). Most studies of variations in parasite community composition have been done in freshwater or brackish‐water fish species in temperate regions (Fellis & Esch, ; Kennedy, ; Klimpel, Seehagen, & Palm, ; Mhaisen, Al‐Salim, & Khamees, ; Simkova, ; Zander, , , ; Zander & Kesting, ; Zander et al., ). Many processes may influence temporal and spatial variations in parasite communities in these regions, including fluctuations in abiotic factors such as temperature, salinity, and dissolved oxygen concentrations (Chubb, ; Eure, ; Granath & Esch, ; Miguez‐Lozano, Pardo‐Carranza, Blasco‐Costa, & Balbuena, ), as well as intermediate host abundance (Esch & Fernandez, ; Fellis & Esch, ; Zander, ; Zander & Kesting, ; Zander et al., ), changes in final host abundance, and reproductive and feeding behavior (Fellis & Esch, ; Klimpel et al., ; Mhaisen et al., ; Simkova, ).…”