National Agricultural Research Organisation. National Fisheries Resources Research Institute Annual Report 2011/2012

The annual report presents present activities and achievements for the reporting year 2011/2012. The Objectives of NaFIRRI are highlighted below: a) Generation of knowledge and technologies of strategic importance for the management, development and conservation of fisheries resources and water quality. b) Establishment and management of the human, physical and financial resources of the National Fisheries Resources Research Institute. c) Provision of technical backstopping and capacity building to the Ministry of Agriculture, Animal Industry and Fisheries (MAAIF), Zonal Agricultural Research and Development Institutes (ZARDIs) and other agencies dealing in fisheries research and water quality. d) Development and management of fisheries research information and ensuring collaboration with stakeholders. e) Planning, monitoring and evaluation of all fisheries research programmes undertaken by the institute to ensure conformity with national research strategy. f) Ensuring the quality of knowledge and technologies developed, multiplied and disseminated through uptake pathways. g) Generation of periodic reports on fisheries and water quality research programmes to National Agricultural Research Council (NARC) and other stakeholders. h) Establishment of sustainable linkages and partnerships with local, regional and international research bodies.

National Agricultural Research Organization. National Fisheries Resources Research Institute (NaFIRRI) Annual Report 2010/2011

The Mandate of the National Fisheries Resources Research institute (NaFIRRI) is to manage, promote and undertake applied and basic research of strategic and national importance in aquaculture, capture fisheries, water environment, socio-economics and marketing, information communication management and any emerging issues in the fisheries

Results of the Austrian-Ceylonese hydrobiological mission 1970 of the Institute of Zoology of the University of Vienna (Austria) and the Department of Zoology of the University of Sri Lanka, Vidyalankara Campus, Kelaniya. Pt. 19. Aquatic and semiaquatic Hemiptera of Sri Lanka from the Austrian Indo-Pacific expedition, 1970-71

This report concerns the aquatic and semiaquatic Hemiptera collected in Sri Lanka by Prof. Starmühlner and Prof. Costa during November and December 1970. A surprising number of new species have been found in the Starmühlner-Costa material, even in groups for which comprehensive revisions exist. Seven new species are described here.

Lake Nabigaga: a field survey undertaken by the National Fisheries Resources Research Institute (NaFIRRI)

The field survey was undertaken by NaFIRRI technical staff. The terms of reference for the survey were to make an assessment of the lake for possible cage fish farming. The survey was undertaken on the 26 August 2010 by a team composed of the several. The lake supports small subsistence fishing activities by the local communities living around it. Information from the local community indicates that the fish species/types occurring in the lake include the Ngege, Nile perch, the African catfish and the lung fish. The fishing crafts in operation are largely Dug-out and Bao Tatu canoes and the main fishing gears are nylon and monofilament gillnets, hooks and beach seines.

On farm trial of Bangladesh Fisheries Research Institute (BFRI) evolved two aquaculture technologies

Two BFRI evolved aquaculture technologies - integrated rice fish farming and carp polyculture with over-wintered fingerlings under different stocking densities were tested during 2003-04. The study was coordinated with two local NGOs namely NICHAITA and JNDP, Muktagacha, Mymensingh. Integrated rice fish farming technology was demonstrated in 9 plots each having an area between 60-100 dec. during boro season. Fifteen days after transplantation of rice seedlings, fingerlings of rajpunti (Barbodes gonionotus) of 7-10 g of individual weight were stocked in the rice fields at the density of 3,000 (T1), 3,750 (T2) and 4,500/ha (T3). The corresponding final weight of fish after three and half months in treatments 1, 2 and 3 were 110±14.21, 101±16.55 and 86±22.28 g, respectively. The mean weight of fish in treatments 1 and 2 was significantly higher than treatment 3. Fish production obtained from treatments 1, 2 and 3 were 218.16±18.29, 239.70±25.11 and 236±24.66 kg/ha, respectively. On-farm demonstrations of carp polyculture using over-wintered fingerlings rohu (25-28 g), catla (24-26 g), mrigal (21-26 g) and grass carp (20-24 g) under different stocking densities were undertaken in nine earthen ponds (1,200-1,600 square meters) for a period of six months at three different stocking densities. The stocking densities of treatment 1 (T1), treatment 2 (T2) and treatment 3 (T3) were 2,000, 3,000 and 4,000/ha, respectively. Fish were fed with rice bran and mustard oil cake (3:1). Soft green grass and banana leaves were provided mainly for grass carp. At harvest, the production obtained in treatments 1, 2 and 3 were 2,325±74.75, 2,620±49.66 and 2,982± 171.52 kg/ha, respectively. The results demonstrated higher growth of fish in treatment 1 than those of treatments 2 and 3. However, treatment 3 contributed relatively higher production than those of treatments 1 and 2, whereas, highest net benefit was received from treatment 2.

Evaluation of a summer institute on fish processing technology

The utility of Summer Institute Efficiency Index (SIEI) is demonstrated using data from evaluation of a summer institute in fish processing. The SIEI worked to 76.16 showing high efficiency rating. The acquisition of skills appears to be independent of coverage and utility perception. The three dimensions of evaluation correlate highly with SIEI.

Fisheries Research Institute (FIRI) Annual Report 1994

This is the first annual report of Fisheries Research Institute (FlRl) under the National Agricultural Research Organization (NARO). NARO was formed by a statute of the government of Uganda in 1992 and became fully operational in 1994. NARO is charged with coordinating and managing national agricultural research in crop. livestock. forestry and fisheries. FIRI is one of the research institutes of NARO. It is charged with generating information and technology to facilitate increased and, sustainable utilization of aquatic resources.

National Agricultural Research Organisation. Fisheries Resources Research Institute Annual Report 1998/99

The annual report presents research programs carried out by the institute during the reporting period. FIRRI has the mandate is to promote, undertake and coordinate all aspects of research in fisheries, fish production systems and the water environment, aquaculture and socio-economics while conserving the natural resource.

Preliminary observations on cage culture of Tilapia esculenta Graham and Tilapia xillii (Gervais) in Lake Victoria waters, at the Freshwater Fisheries Institute, Nyegezi, Tanzania

Cage culture of Tilapia is not suggested as a substitute for any known techniques in fish culture, but as one of the various techniques of obtaining more fish under controlled conditions. This fact has been very well accepted in various countries. Whererever facilities exist, this line of fish culture should be vigorously explored as a possible avenue in increasing fish production. High density stocking, management under controlled conditions, easy technique of fabricating the cage at relatively low cost, having no demand on land area, absence of prolific and effective breeding and easy availability of fish when a person needs it are a few of the attractions of the technique. The studies indicate that it is desirable to have different meshes for the cages, such as, small meshed cages for rearing fry to fingerlings stages, and larger meshed cages for rearing fingerlings to table sized fishes. II' the meshes are small, the resistance will be more and less water wilt pass through. While feeding with powdered food material, because of brisk activity of feeding fish, a part of the feed appeared wasted. This can be easily overcome if we would resort to feeding fish with cheap pelleted feeds which will no doubt reduce wastage. Precaution has to be taken against damage of the net and thereby loss of fish and against poaching by unauthorised persons. In the present attempt has been demonstrated the possibility of utilizing locally available species of Tilapia for cage culture and obtaining moderately satisfactory growth rates.

Hybridization between Tilapia zillii (Gervais) and Tilapia andersonii (Casteinau) at the Freshwater Fisheries Institute, at Nyegezi, Tanzania

As a part of an overall project on fishculture development techniques in Tanzania, hybridization between Tilapia zillii and Tilapia andersonii was carried out at the Freshwater Fisheries Institute, Nyegezi, Tanzania. T. andersonii, a plankton feeder, is not indigenous to Tanzania but was introduced in 1968 from Zambia for certain specific purpose. T. zillii, a macrovegetation feeder, is present locally and is common. In the present studies T. zillii (245.0 mm/260.0 g) female was hybridized with T. andersonii (288.0 mm/350.0 g) male. Under cement cistern conditions it was only after about four months of acclimatization that hybridization between the two occurred. About 1,637 interspecific hybrid fry were produced in a single brood. Eggs were adhesive and parental care shown by the female, the male being driven away. Growth under cistern conditions was slow, attaining a size of 134.8 mm/44.3 g in 10 months. But this growth rate need not be taken as ideal. In body shape, colouration and other morphometric characters the hybrids had inherited from both parents. The number of gill rakers among the hybrids was eighteen which was intermediate between T. zillii (12) and T. andersonii (27). Among one hundred and seventy two specimens (106.0 mm - 168.0 mm) cut and examined the sex ration was hundred per cent males and all of them were between II and IV stages of maturity. This is the first report of fish hybridization from Tanzania and possibly the first report on hybridization between T. zillii and T. andersonii. The full significanoe of the findings and its role in African fishculture is discussed.