Efek Perbedaan Salinitas Dan Tempertur Air Terhadap Pertumbuhan Dan Efisiensi Pakan Ikan Nila Gift (Oreochromis SP.)

Six treatments and five replications on randomized complete design (RCD) has been conducted to evaluate the growth dan food efficiency of nile Gift (Oreochromis sp.). The treatments as follow : fish rearing on 0 ppt salinity and 26oC water temperature; fish rearing on 0 ppt salinity and 30oC water temperature; fish rearing on 10 ppt salinity and 26oC water temperature; fish rearing on 10 ppt salinity and 30oC water temperature; fish rearing on 20 ppt salinity and 26oC water temperature; fish rearing on 20 ppt salinity and 30oC water temperature. Fish with average body weight 15,22±1,72 g was used in this experiment. The result showed that the specific growth rate in both wet weight and dry weight, both food eficiency ratio and protein eficiency ratio of nile Gift tilapia were not affected by salinity and temperature different (P>.05). Conclution, the growth and food efficieny of nile Gift are not changed with different of water salinity and temperature. Key words : Oreochromis sp., salinity, temperature, growth rate, food efficienc

Preliminary studies on bamboo floating cage and net enclosure culture in Kainji Lake basin

The main objective of this paper is to introduce bamboo floating cage and net enclosure fish culture technology aimed at producing fish from almost all available inland bodies of water in Nigeria. The experimental approach embarked upon at Kainji Lake Research Institute is discussed. Results obtained from these experiments would help in identifying the inherent problems of this culture system and in determining the urgently needed information that will serve as management and production guidelines for adapting the technology to local conditions of varying ecological characteristics in Nigeria. Ultimately, the project is aimed at increasing the productivity of fishermen/fish farmers and hastening the development of rural communitie

Helminth fauna of Oreochromis leucostictus (Pisces: Cichlidae) from a tropical lake, Lake Naivasha, Kenya

The helminth fauna of Oreochromis leucosticus (Trewavas) from Lake Naivasha is described. The study was carried out on 1,050 gillnetted fish caught over a period of 24 months at different sites within the lake. Oreochromis leucosticus which is a commercially important fish was observed to be a host of four helminth parasites. These were an acanthocephalan polyacanthorhynchus kenyensis (Schmidt and Canaris), a nematode contracaecum sp.. a trematode clinostomum sp. and a dilepidid cestode Amirthalingamia sp. Seasonal variation in prevalence, intensity of infection, organs infected and the variation in infection with the size, sex and body condition of the host are described. There was no seasonal variation in prevalence but intensity of infection was observed to increase with the age of the fish. Although male fish were observed to be more heavily infected, the parasites did not seem to have any significant effect on the body condition of the fish

Isolation, identification and prevalence of parasites on Oreochromis niloticus from three selected river systems

The prevailence of protozoan and helminthic parasite species occurring on and in the internal organs of Oreochromis niloticus were studied. Twenty samples of a mixture of adult and juvenile individuals of Oreochromis niloticus were randomly obtained from fishermen landing at the jetties of Epe water side, Ikorodu (Odoguyan) river and a brackish water (makoko), between September and and October, 2009, during a period of low rainfall. Samples were eviscerated and the parasites were excised, identified and each specie of parasites was counted. Most of the parasites encountered were of the Protozoa, manogenea, Digenea, Cestoda and Nematoda groups. The infestation was predominantly by Nematoda species and followed by protozoan species. Protozoan parasites like Trichodina sp and Ichyobodo sp were found to be prevalent, in varying magnitude, in most of the fish samples without clear age discrimination. The study reveals that the prevailence of parasites infestation increases with increasing length, size and age of the fish host and different pars of the fish

Zooplankton-fish interactions in the littoral zone of Nyanza Gulf, Lake Victoria

Samples of zooplankton and fish were collected from six sampling points in Nyanza Gulf, Lake Victoria in Kenya from June to December 1998, using 76 mu m memo-filament mesh size strainer and an 80 mu m mesh size plankton net. Identification and enumeration were done in the laboratory. Occurrence, numerical and points methods were used in stomach anlaysis of fish. Copepoda, Rotifera and Cladocera were the major zooplankton groups identified, zooplankton such as Moina, Daphnia and Caridina nilotica were important prey items for Lates niloticus, Oreochromis niloticus and Rastrineobola argente

Development of Aquaculture Environmental Management for the Improvement of Production Capacity for Sustainable Aquaculture Activities

This study is aimed to develop the environmental management of fish farming in order to support sustainable farming activities in the form of production of high protein fish pellets using local natural biotas, especially freshwater clams (Anodonta woodiana Lea) and golden snails (Pomacea sp.) and efforts to increase the carrying capacity of water environment of Rawapening. Biosecurity application includes the identification and prevention of disease, controlling the quality of the environment, and implement eradication programs when an outbreak of disease occurs. Physical, chemical and biological tests suggested that pellet using A. woodiana Lea and Pomacea sp. as protein sources is better than commercial pellet. Diseases that generally attack the culture of tilapia (Oreochromis niloticus) in Rawapening waters include parasite Trichodina sp, Trichodinella sp, fungi Saprolegnia sp, and bacteria Streptococcus sp

PENGUJIAN TEPUNG AZOLLA FERMENTASI SEBAGAI BAHAN PENYUSUN PAKAN TERHADAP FCR DAN PERTUMBUHAN IKAN NILA GIFT (Oreochromis sp)

This research have been executed on 20 October - 17 september 2008 [in] Laboratory of Indoor Fishery, Faculty Of Veterinary - Fishery Of University of Muhammadiyah Unlucky. Target of this research is to know Examination Of Flour of Azolla Ferment Upon Which Compiler Of woof To FCR And Growth Of Fish of Nila Gift (Oreochromis sp)\ud Method the used [is] experiment method with complete random device model ( RAL), while data analysis by using manner sidik, by 4 ( treatment empat) that is P0 ( 0 : 100), P1 ( 15 : 85), P2 ( 30 : 70), P3 ( 45 : 55) and also thrice restating.\ud Result of from this research [is] examination of flour of azolla ferment in real influence pakan ( P > 0,01) to ratio convert pankan ( FCR) and growth of fish of nila gift ( Sp Oreochromis). Ratio convert pakan ( Lower FCR) [at] treatment of P1 equal to 3,44 while P2 equal to 4,04, [is] later;then followed [by] treatment of P0 equal to 4,13 and P3 equal to 6,38. specific Growth value have an effect on very real ( P > 0,05) [at] treatment of P1 ( 25 : 85) equal to 6,8% BW / day while treatment of P2 ( 30 : 70) equal to 6,26% BW / day [is] later;then followed with treatment of P0 ( 0 : 100) equal to 6,46% BW / and day of P3 ( 45 : 55) equal to 5,05%BW / day. Quality of water as media live fish [in] earning temperature [among/between] 24,76 - 25,72 oC, dissolve oxygen 5,69 - 6.05 and ppm of pH 7,5 - 7,62..\ud Conclusion of examination of flour of azolla ferment in pakan differ reality to ratio value convert pakan ( FCR) and growth of Fish of Nila Gift ( Oreochromis Sp). Matter this means usage of flour of azolla ferment into pakan can use at degree of comparison 15% for the best

A review of diseases associated with cage culture systems: diagnosis and control in smale scale fish farming

Fish cage culture is a rapid aquacultural practice of producing fish with more yield compared to traditional pond culture. Several species cultured by this method include Cyprinus carpio, Orechromis niloticus, Sarotherodon galilaeus, Tilapia zilli, Clarias lazera, C. gariepinus, Heterobranchus bidorsalis, Citharinus citharus, Distochodus rostratus and Alestes dentes. However, the culture of fish in cages has some problems that are due to mechanical defects of the cage or diseases due to infection. The mechanical problems which may lead to clogged net, toxicity and easy access by predators depend on defects associated with various types of nets which include fold sieve cloth net, wire net, polypropylene net, nylon, galvanized and welded net. The diseases problems are of two types namely introduced diseases due to parasites. The introduced parasites include Crustaseans, Ergasilus sp. Argulus africana, and Lamprolegna sp, Helminth, Diplostomulum tregnna: Protozoan, Trichodina sp, Myxosoma sp, Myxobolus sp. the second disease problems are inherent diseases aggravated by the very rich nutrient environment in cages for rapid bacterial, saprophytic fungi, and phytoplanktonic bloom resulting in clogging of net, stagnation of water and low biological oxygen demand (BOD). The consequence is fish kill, prevalence of gill rot and dropsy conditions. Recommendations on routine cage hygiene, diagnosis and control procedures to reduce fish mortality are highlighte

Selectivity of three aquatic weeds as diet for Nile tilapia (Oreochromis niloticus)

A total of sixty juvenile Oreochromis niloticus (Nile tilapia) were fed three species of aquatic weed, namely Azolla filiculoides (water fern), Elodea sp. and Pistia stratiotes (water lettuce) to determine which of the weeds will be selectively consumed, and preferred of all. A control group of twenty Nile tilapia was fed compounded feed. The selectivity of the weeds was observed based on their utilization as food source, and Azolla filiculoides was found to be highly utilized, followed by Elodea sp. and the roots of Pistia stratiotes. The growth response of the fish to the diets was found to be highest for fish fed compounded feed followed by Azolla filiculoides and Elodea sp., while Pistia stratiotes produced a negative growth trend. It is therefore postulated that Azolla filiculoides and Pista sp. are good feedstuffs for O. niloticus especially when used together with other feedstuff