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  • 1
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    A baseline report of water quality and invertebrate assessment in River Hohwa, Lake Albert: final report (2021)
    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17202 | 4230 | 2016-02-19 09:21:41 | 17202 | National Fisheries Resources Research Institute, Uganda
    Details
    Publication Date: 2021-07-11
    Description: Tullow Oil plc is to launch an onshore Early Production System (EPS) of oil drilling rated at 4,000 barrels of oil per day by 2009. The location of the EPS is in the Kaiso-Tonya area of Block 2 Oil Exploration Zone along Lake Albert within the Albertine graben. Tullow Oil plc contracted Environmental Resources Management (ERM) Southern Africa (Pty) Ltd in conjunction with Environmental Assessment Consult Limited (EACL) to undertake an Environmental Impact Assessment (EIA) for pre-construction and operation of the proposed EPS. ERM in association with EACL requested National Fisheries Resources Research Institute (NaFIRRI) to conduct a baseline survey of water quality and invertebrates in River Hohwa. This study was requested as part of an earlier baseline survey conducted at the Kaiso-Ngassa spit oil exploration area in Block 2. It was conducted at five selected sites (Fig. 1 & Table 1) within the Hohwa River basin in the Kaiso-Tonya Exploration Area 2. The study was pertinent because the targeted oil wells for EPS are upstream this river which drains the Kaiso-Ngassa valley into Ngassa lagoon.
    Description: Environmental Assessment Consult Limited (EACL)
    Keywords: Environment ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 19
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  • 2
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    A baseline survey of water quality, invertebrates, fisheries and socioeconomics on Lake Edward for proposed seismic surveys in block 4B : Final report (2021)
    National Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20388 | 4230 | 2016-03-18 07:41:57 | 20388 | National Fisheries Resources Research Institute, Uganda
    Details
    Publication Date: 2021-07-09
    Description: The National Fisheries Resources Research Institute (NaFIRRI) on behalf of OPEP Consult Ltd undertook a baseline survey of the transition zone (basically along the shoreline) and near shore habitats of the Uganda apart of Lake Edward and Kazinga channel during December 2007 to January 2008. A major objective of the baseline survey was to generate baseline information on the aquatic ecosystem features related to the fisheries and socio-economics of the fish catch including issues raised by residents in the fish landing sites. Therefore, the baseline survey captured information on water quality, the aquatic invertebrate fauna, aspects of fish biology and ecology, the fish catch including facilities at fish landings, value in the catch and related fisheries socio-economic issues perceived by residents in the settled areas along the shores.
    Keywords: Environment ; Fisheries ; Sociology
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 67
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  • 3
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    A basis for the rational exploitation of the Tilapia esculenta stock of the North Buvuma Island area, Lake Victoria (2021)
    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19604 | 4230 | 2020-11-09 02:43:06 | 19604 | National Fisheries Resources Research Institute, Uganda
    Details
    Publication Date: 2021-07-02
    Description: It is a well established feature of biological systemsthat the constituent organisms are in balance with each other.This is true of a fish population which is in balance with theother organisms of its own ecosystem, and within itself insofaras the numbers of fish entering a fish stock are approximatelyequal to those dying by natural causes.It is also true that 9 as fish grow through the population,they reach a particular size where the increase in weight in a year 9 due to the growth of all the fish in the population of that size, is balanced by the loss of weight due to natural death.The maximum yield of a fishery could thus be obtained by removing all fish as they reach this age. In practice it would require an infinite amount of fishing to accomplish this 9 and it is generalpractice in fishery management to begin cropping fish just before they reach this ideal size and age.
    Keywords: Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 12
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  • 4
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    A brief report on a survey of the fish and fisheries of the Tana river, with special reference to the probable effects of the proposed barrages (2021)
    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16898 | 4230 | 2015-06-04 18:00:02 | 16898 | National Fisheries Resources Research Institute, Uganda
    Details
    Publication Date: 2021-07-09
    Description: The construction of several barrages in order to develop the hydroelectric and irrigation potential of the Tana river has been proposed and the probable effects of these developments upon the fish and fisheries of the area' has been investigated. Briefly in the highest reaches the sport fishery will be unaffected, in the middle reaches the sparse subsistence fisheries will be only slightlyinconvenienced but in the terminal reaches of the river the subsistence and commercial fishing enterprises are expected to be seriously reduced by the progressive re-regulation of river-flow. However each new dam will support a new and productive reservoir fishery and with proper development the annual yield of fish from the Tana basin is expected to increase considerably.
    Description: Top of title page: EAFFRO Occasional Paper, 10
    Keywords: Fisheries ; EAFFRO
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 13
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  • 5
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    A new water weed, giant salvinia (Salvinia molesta), invades Lake Kyoga (2021)
    National Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20322 | 4230 | 2016-06-15 12:23:31 | 20322 | National Fisheries Resources Research Institute, Uganda
    Details
    Publication Date: 2021-07-09
    Description: Giant salvinia (Salvinia molesta) is an introduced invasivewater weed in the tropics and subtropics It is a free floating weed that grows rapidly and forms extensive dense mats over still or slow moving waters.
    Keywords: Environment ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 2
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  • 6
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    A note on a second survey of the fisheries of the Tana river, Kenya (2021)
    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19861 | 4230 | 2021-02-14 02:02:11 | 19861 | National Fisheries Resources Research Institute, Uganda
    Details
    Publication Date: 2021-07-05
    Description: A preliminary report upon a survey of the fisheries of the Tana River,Kenya undertaken during the dry season, August-September 1965, wasissued in September the same year (Mann 1965), and a shortened accountwas subsequently published (Mann 1966). However during 1967 the survey,which had been interrupted, was resumed and a second visit was made tothe area during the wet season of April-May
    Keywords: Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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  • 7
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    A note on length frequency and "species group" composition of Haplochromis populations in lake Victoria (2021)
    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19909 | 4230 | 2021-02-14 02:18:07 | 19909 | National Fisheries Resources Research Institute, Uganda
    Details
    Publication Date: 2021-07-05
    Description: During the preliminary part of a survey on Haplochromis in a small area of Lake Victoria off Entebbe some interesting information was collected on the composition of the Haplochromis populations. Because of the complex nature of the taxonomy it is very difficult to divide the genus Haplochromis into all its species when working in the field. Certain broad types however can usually be recognized and the genus has been classified into eighteen "species-groups" comprising eight groups of predators and ten groups of non-predators.
    Keywords: Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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  • 8
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    A note on Lernaea bistricornis Harding, a parasitic Copepod from Lake Tanganyika, 1958. (2021)
    East African Fisheries Research Organisation | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16887 | 4230 | 2020-08-23 07:41:40 | 16887 | National Fisheries Resources Research Institute, Uganda
    Details
    Publication Date: 2021-07-09
    Description: The parasitic Copepod Lernaea bistricornis Harding was described by Harding (1950) from a single specimen found in Lake Tanganyika on the endemic Cichlid fish Cardio pharynx schoutedeni POLL. No further specimens were known until when several individuals were collected in the same lake by Dr. G. MARLIER from the endemic Cichlid fishes Cyathopharynx Furcifer (Boulenger) and Callochromis pleurospilus (Boulenger). These records indicate that L. bistricornis has fairly wide host preferences, at least within the fainily Cichlidae, and suggest that, like its relative L. lophaira Harding which parasitizes the Cichlid fishes of L. Nyasa, it is capable of parasitizing any member of this group within its range of distribution.
    Keywords: Fisheries
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 214-216
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  • 9
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    A note on some of the major parasites of Bagrus docmoc (Forskahl) from Lake Victoria (2021)
    Uganda Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19936 | 4230 | 2020-10-19 13:55:59 | 19936 | National Fisheries Resources Research Institute, Uganda
    Details
    Publication Date: 2021-07-05
    Description: Although the Biology of Bagrus docmac of Lake Victoria and its associated rivers is fairly known, comparatively little information appears to have been published on the major parasites and their effect on growth rate and morality of this commercially important species.
    Keywords: Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 5
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  • 10
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    A note on some physico-chemical features of river Nzoia (2021)
    UFFRO | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19929 | 4230 | 2020-09-04 02:32:20 | 19929 | National Fisheries Resources Research Institute, Uganda
    Details
    Publication Date: 2021-07-05
    Description: Preliminary analyses for some of the major physicochemicalfeatures of River Nzoia, in Western Kenya, effluent to LakeVictoria are given. Some fear is expressed concerning the possible chemical, physical and consequently biological pollution from the effluents of a paper factory situated along the course of the river.
    Keywords: Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 2
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