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

Abstract

An investigation was conducted from November, 2010 and August, 2011 in Lake Lugo (Hayke), northeast Ethiopia, with the aim of determining the prevalence and identifying the species of internal parasites from freshwater fish. A total of 412 randomly selected fishes comprising of 225 Oreochromis niloticus, 72 Clarias gariepinus and 115 Cyprinus carpio were examined for internal helminthes parasites. An overall prevalence of 47.8% (197/412) internal parasitic infestation was assessed. Statistically significant difference at p<0.05 was noted in the prevalence of internal parasites among the different species, length and weight of fish. However, the difference between sexes was not statistically significant at p>0.05, but the prevalence was a bit higher in females (48.31%) than males (47.44%). Prevalence of internal parasites was higher in Clarias gariepinus (91.7%) followed by Oreochromis niloticus (50.22%), and Cyprinus carpio (15.6%) species. Six parasite species: three nematodes (Contracecum spp., Camallanus spp., Eustrongylides spp.); one trematode (Clinostomum spp.) and two cestodes (Ligula intestinalis, Proteocephalus spp.) were identified from the body cavities and gastrointestinal tracts of fishes. In conclusion, the prevalence of internal parasitic infestations was very high and the study determined six parasitic species present in fish, which were not previously examined in this Lake.

Preliminary Survey of Gram-Negative Bacterial Pathogens from Commonly Caught Fish Species (Oreochromis niloticus, Cyprinus carpio and Clarias gariepinus) in Lake Hayiq, Ethiopia

“…It is located 440 kilometer north of Addis Ababa the capital of Ethiopia, situated at 110 15'N latitude, 390 57'E longitudes. It lays two kilometers East of Hayiq town [11]. It can be categorized as sub-humid tropical with an annual rainfall of 1173 mm with ambient temperature of 18.2°C.…”

“…It has a maximum depth of 88.2 meter and is at an elevation of 2,030 meters above sea level. The Lake has no visible outlet and the water appearance looks clear and greenish [11].…”

Parasites of Nile tilapia (<i>Oreochromisniloticus</i>) from selected fish farms and Lake Koftuin central Ethiopia

“…The digenean trematode Clinostomum spp.was one of the most common parasites identified in Lake Koftu and Sebeta ponds. This parasite species was also identified in many water bodies in Ethiopia including Lake Tana (Yimer, 2003), Yemlo and Wonji pond, lake Babogaya and Lake Awassa (Tadesse, 2009), Lake Lugo (Amare et al, 2014), Koka reservoir (Gulilat et al, 2013), Small Abaya Lake (Reshid et al, 2015) and Lake Ziway (Bekelle and Hussien, 2015).…”

“…There are also some recently published articles on fish parasites of Ethiopian water bodies such as Lake Lugo, Lake Small Abaya, Lake Ziway and Lake Awassa. (Florio et al, 2009;Bekelle and Hussien, 2015;Amare et al, 2014;Reshid et al, 2015). Koftu Lake has commercially important fish species where the National Fishery and Aquatic Life Research Center, Sebeta collects fingerlings and disseminate them for small scale fish farmers when there is demand.…”

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“…In this research there was very low abundance of G. limnonephrotus on African catfish C. gariepinus compared to O. niloticus. The prevalence and abundance of the parasites on the catfish and O. niloticus could as well be related to the polyculturing, Amare et al, (2014) and feeding habits of the fish Arkoll et al, (2011). Arkoll et al, (2011 noted that the feeding habits of C. gariepinus and O. niloticus cultured in same pond could affect the exposure to parasites.…”