scholarly journals Polychlorinated biphenyls and hexachlorocyclohexanes in sediments and fish species from the Napoleon Gulf of Lake Victoria, Uganda

2014 ◽  
Vol 481 ◽  
pp. 55-60 ◽  
Author(s):  
Patrick Ssebugere ◽  
Mika Sillanpää ◽  
Bernard T. Kiremire ◽  
Gabriel N. Kasozi ◽  
Pu Wang ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Fish Species ◽  
Lake Victoria

scholarly journals Polychlorinated biphenyls in sediments and fish species from the Murchison Bay of Lake Victoria, Uganda

2014 ◽  
Vol 482-483 ◽  
pp. 349-357 ◽  
Author(s):  
Patrick Ssebugere ◽  
Mika Sillanpää ◽  
Pu Wang ◽  
Yingming Li ◽  
Bernard T. Kiremire ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Fish Species ◽  
Lake Victoria

scholarly journals A review on the status of some major fish species in Lake Victoria and possible conservation strategies

2020 ◽  
Vol 25 (1) ◽  
pp. 105-111 ◽  
Author(s):  
Nicholas Otieno Outa ◽  
Edwine Omollo Yongo ◽  
James Last A. Keyombe ◽  
Erick O. Ogello ◽  
David Namwaya Wanjala
Keyword(s):  
Fish Species ◽  
Lake Victoria ◽  
Conservation Strategies ◽  
The Status

Morphometric differentiation among haplochromine cichlid fish species of a satellite lake of Lake Victoria

2011 ◽  
Vol 49 (3) ◽  
pp. 216-223 ◽  
Author(s):  
Elizabeth A. Odhiambo ◽  
Michaela Kerschbaumer ◽  
Lisbeth Postl ◽  
Christian Sturmbauer
Keyword(s):  
Fish Species ◽  
Lake Victoria ◽  
Cichlid Fish ◽  
Haplochromine Cichlid ◽  
Morphometric Differentiation

scholarly journals Quantity and species of fish consumed shape breast-milk fatty acid concentrations around Lake Victoria, Kenya

2017 ◽  
Vol 21 (4) ◽  
pp. 777-784 ◽  
Author(s):  
Kathryn J Fiorella ◽  
Erin M Milner ◽  
Elizabeth Bukusi ◽  
Lia CH Fernald
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Breast Milk ◽  
Breast Feeding ◽  
Fish Species ◽  
Fish Consumption ◽  
Infant Development ◽  
Lake Victoria ◽  
Milk Fatty Acid ◽  
Cross Sectional

AbstractObjectiveLong-chain PUFA (LCPUFA) found in breast milk are derived from dietary sources and critical for optimal infant development. We examined associations between fish consumption and concentrations of LCPUFA and essentialn-3 andn-6 fatty acids in breast milk among mothers living around Lake Victoria.DesignWe used cross-sectional analyses of associations between recent fish consumption and breast-milk fatty acid concentrations.SettingThe study was conducted around Lake Victoria on Mfangano Island, Kenya, where multiple fish species are key dietary components and also are widely exported.SubjectsBreast-feeding mothers (n60) provided breast-milk samples, anthropometric measurements and questionnaire responses.ResultsIn the previous 3 d, 97 % of women consumed a mean of 178 (sd111) g fish (~2 servings/3 d). Mean breast-milk concentrations included DHA (0·75 % of total fatty acids), EPA (0·16 %), α-linolenic acid (ALA; 0·54 %), arachidonic acid (AA; 0·44 %) and linoleic acid (LA; 12·7 %). Breast-milk DHA concentrations exceeded the global average of 0·32 % in fifty-nine of sixty samples. We found native cichlids (Cichlidae) anddagaa(Rastrineobola argentea) contributed high levels of DHA, EPA and AA to local diets. We also found evidence for associations between fish species consumed and breast-milk LCPUFA concentrations when controlling for intake of other fish species, maternal body mass, maternal age, child age and exclusive breast-feeding.ConclusionsThe fatty acid composition of breast milk was influenced by the fish species consumed. Ensuring access to diverse fish and particularly inexpensive, locally available species, may be important for diet quality as well as infant growth and development.

scholarly journals The impacts of introduced species on lake ecosystems: A case of Lakes Victoria and Naivasha, Kenya.

2019 ◽  
Author(s):  
Nicholas Outa ◽  
Dan Mungai ◽  
James Last A. Keyombe
Keyword(s):  
Introduced Species ◽  
Fish Species ◽  
Largemouth Bass ◽  
Water Hyacinth ◽  
Native Species ◽  
Nile Tilapia ◽  
Lake Victoria ◽  
Nile Perch ◽  
Lake Naivasha ◽  
Lake Ecosystems

Fish and other aquatic organisms have been introduced into new environments for various reasons. Provision of sports fishery, supplemental to stocks, to fill empty niches, control weeds, and disease vectors and even create a commercial fishery are some of the reasons why fish species are introduced into new ecosystems. Lake Victoria and Lake Naivasha in Kenya have seen several introductions as discussed in this paper. In Lake Victoria for example, some of the species introduced include Nile perch, Lates niloticus, Nile tilapia, Oreochromis niloticus, Tilapia zilii, and Oreochromis esclentus among others. The most successful introductions have been that of the Nile perch, Nile tilapia and water hyacinth. Lake Naivasha too has witnessed a number of introductions into its fisheries too. Some of the successful introductions into the lake are those of the Common carp, Cyprinus carpio, the largemouth bass, Micropterus salmoides, the Nile tilapia, O. niloticus and Louisiana red swamp crayfish, Procambarus clarkia. Aside from the fish species mentioned, some invasive plant species have also been introduced into these two lake ecosystems. Of notable success and impacts have been the water hyacinth, Eichhornia crassipes and Nile cabbage, Pistia stratiotes. These introductions have had both negative and positive impacts on the fisheries and the ecology of the two lakes. Some of the impacts have been predation on the native species by the introduced species like in the case of Nile perch and largemouth bass in Lake Victoria and Naivasha respectively. Competition for resources and hybridization with the native species has also been witnessed in the case of the tilapiines in the two lakes with undesirable results. Blockage of navigation routes caused by the invasive plants has been a major problem in the two lakes sometimes leading to massive postharvest losses by the fishermen. On the other hand, some introduced species have led to an increase in fish landings as well as utilization of the niches that were initially vacant within these ecosystems. It can therefore be concluded that introduced species often have more negative effects on the native species and therefore such introductions should be based on sound scientific research in order to minimize their effects within the new environments.

scholarly journals Assessment of the Ecological Health of Afrotropical Rivers Using Fish Assemblages: A Case Study of Selected Rivers in the Lake Victoria Basin, Kenya

2021 ◽  
Vol 2 ◽  
Author(s):  
Alfred O. Achieng ◽  
Frank O. Masese ◽  
Tracey J. Coffey ◽  
Phillip O. Raburu ◽  
Simon W. Agembe ◽  
...  
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Fish Assemblages ◽  
Lake Victoria ◽  
Principal Component ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Lake Victoria Basin ◽  
Anthropogenic Pressures ◽  
Species Tolerance

Streams and rivers are globally threatened ecosystems because of increasing levels of exploitation, habitat degradation and other anthropogenic pressures. In the Lake Victoria Basin (LVB) in East Africa, these threats are mostly caused by unsustainable land use; however, the monitoring of ecological integrity of river systems has been hampered by a lack of locally developed indices. This study assessed the health of four rivers (Nzoia, Nyando, Sondu–Miriu and Mara) on the Kenyan side of the LVB using physicochemical water quality parameters and a fish-based index of biotic integrity (IBI). Fish tolerance ranking was derived from principal component analysis of water quality parameters, and the concept of niche breadth (NB). The relationship between fish species and water quality parameters was examined with canonical correspondence analysis, whereas community metrics and stressors were evaluated through Pearson network correlation analysis. Fish species richness, trophic structures, taxonomic composition and species tolerance were used to generate the metrics for fish-based IBI. NB showed that most of the fish species were moderately tolerant to poor water. Moderately tolerant and intolerant fish species were negatively correlated with a high level of organic loading in the Mara River. Fish-based IBI scores for the rivers ranged from 26 to 34, with Sondu–Miriu scoring the lowest. Our results show that the cumulative effect of stressors can adequately rank fish species tolerance according to the disturbance gradients and further develop regional metrics to assess river health. Despite the fact that fish communities are declining, continual management and enforcement of environmental regulations are important, with conservation and management of headwaters and low-order streams being essential while they are still species rich.

Contribution of fish farmers to conservation of endangered Lake Victoria Basin fish species - the case of Oreochromis variabilis and O. esculentus.

2020 ◽  
Author(s):  
Harrison Charo-Karisa ◽  
Jacob Maithya
Keyword(s):  
Growth Performance ◽  
Fish Species ◽  
Lake Victoria ◽  
Culture Conditions ◽  
Water Bodies ◽  
Lake Victoria Basin ◽  
Endangered Fish ◽  
Small Water ◽  
Course Of Action

Abstract This paper discussed the conservation efforts of fish farmers of two endangered fish species in Lake Victoria namely Oreochromis variabilis and O. esculentus. Highlights focused on the determination of their growth performance under culture conditions, assessing their suitability for aquaculture, recruiting farmers to culture the species and testing the suitability of new dams and ponds for aquaculture. Both species breed easily under culture conditions. Therefore production of the fingerlings and their subsequent stocking in ponds, small water bodies and other larger water masses, including Lake Victoria, was a course of action implemented by the fish farmers to bring about their restoration.

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