Short Description: Fisheries and Aquaculture Journal (FAJ) publishes peer-reviewed research articles, reviews and research notes. FAJ is a HYBRID OPEN ACCESS journal publishing quality research in Fish and Shellfish Nutrition, Health, Genetics, Genomics, Ecology, Biodiversity, Population/Conservation Biology, and Oceanography.
Publisher: AstonJournals - Longdom Publishing
Email: [email protected]
May 16, 2023
A cross-sectional study was conducted in different Lakes of South Wollo Zone of the Eastern Amhara Regional State of Ethiopia, from November 2018 to April 2019, with the aim of determining the prevalence and identifying the species of internal and external parasites from fresh water fish. A total of 506 Oreochromis niloticus and 215 Cyprinus carpio fish (n=721) were collected and examined for the presence of fish helminthes parasites. The prevalence of parasites in Lake Luggo, Ardibo, Golbo and Maibar were found to be 49.4%, 41.7%, 46.7% and 36.0% respectively. The overall prevalence of parasites of both fish species was 45.1%. The prevalence of parasites in O. niloticus was found to be 42.3% and that of Cyprinus carpio was 51.6%. There was statistical significant difference (X2=5.311, p= 0.021) between the two fish species in the overall prevalence of the parasite infestations. However, the difference in prevalence of parasites among study site was not statistically significant X2=3.263, p=0.064). In this study, five parasites namely Contracecum spp and Camallanus spp. (nematoda), Clinostomum spp., Diplostomum spp. (eye fluck) and Posthodiplostomum spp. (Black spot), (trematoda) were recovered with a prevalence of 29.4% (n=212), 13.2% (n=93), 25.3% (n=183), 2.5% (n=18), and 14.8% (n=107) with the overall prevalence of 45.1% (n=325) respectively. There was a statistically highly significant difference (X2=126.504, p=0.000) in the prevalence and distribution of parasite between the study area. No significant variations (P>0.05) in prevalence of helminthes parasite were noticed in relation to sex and study sites of fishes, but in case of age significant variation was observed (p<0.05) except in which prevalence was observed to significantly increase when age is decreased. Among the parasites recovered Clinostomum spp. and Contracaecum spp. have been reported to be zoonotic and therefore, more research is required to characterize them and determine their zoonotic importance. Meanwhile, the present study revealed that helminthes parasites are among the major health constrains of fishes in the aforementioned water bodies, demanding an urgent control Intervention.
Apr 26, 2023
Dhanusha is one of the leading fish producing districts in Nepal and the fish farming is increasing in the district to establish the district as a ‘fisheries center’. However, with the increasing fish farming and intensity, a number of diseases find their way to the farm which may hinder the progress of fish farming. Present study was carried out in CFPCC21/22 to assess the fish farming practices and the diseaseoccurrence in fish farms of Dhanusha district. Questionnaire based personal interviews were conducted with 64 fish farmers selected from all over the district using simple random sampling. Majority of therespondents were males (89.1%), in the active age group of 30-50 years (71.9%), with average experience of more than 15 years (39%) in fish farming. The widely adopted farming system was carp polyculture, however, some of the farmers also culture other species like Pangas, African catfish, Rupchand,Puntius etc. Only earthen ponds were common with water depths of 5 ft-7 ft (54.7%). Majority of the respondents relied on private hatcheries (34.4%) for fish seeds and the most common stocking size was fingerlings (42.2%) and fry (29.7%). The major source of information and technical support for the farmers were successful farmers (82.8%) and government offices (73.4%). Approximately 65.6% of thefarmers had received trainings on fish production and disease management. The most common feed materials were mustard oil cake (100%); rice bran (96.9%) and commercial pellet feed (54.7%). Cattle dung (87.5%); poultry manure (28.1%) and urea/DAP (95.3%) were the major fertilizers used by the farmers. The most prevalent fish disease was argulosis (96.9%), Lernaea (90.6%) and EUS (85.9%), but asphyxiation (82.8%) caused the reportedly highest mortality of 346.1 ± 305.5 kg/ha. Similarly, the most susceptible species to disease was naini (65.6%) followed by silver carp (49.0%) and bighead carp (34.0%), while the least infected species was grass carp (0.8%). Winter (70.3%) was reported to be the main season for the occurrence of fish diseases in Dhanusha district. The average B/C ratio in pond aquaculture in the study area was 1.36.
Mar 31, 2023
For hundreds of people worldwide, fishing and aquaculture continue to be vital sources of food, nutrition, revenue, and livelihoods. The development of innovative culture techniques and the enhancement of culture systems for the blue revolution are products of the expansion of the fisheries and aquaculture industries. Integrated Multi- Trophic Aquaculture is one such system (IMTA). Using water-borne nutrients and energy transfer, IMTA is an intense and synergistic cultivation of numerous species inhabiting different trophic levels of the water column. One species' waste becomes a valuable resource for another aquatic species. By turning leftovers and uneaten feed from fed organisms into harvestable crops, IMTA encourages economic viability and increases ecological sustainability. Also, it has been the subject of several initiatives in numerous nations. This article is a brief description of the IMTA, its design, and relevance to sustainability. Furthermore, with a final conclusion, a later section will discuss its specific benefits and projects implemented around the world.