DOCSLIB.ORG

Current State of Zooplankton Diversity in the Pelagic Zone of Lake Tanganyika Offshore of Bujumbura City S Ndikuriyo, Lambert Niyoyitungiye, C Sibomana, D Nahimana

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Current State of Zooplankton Diversity in the Pelagic Zone of Lake Tanganyika Offshore of Bujumbura City S Ndikuriyo, Lambert Niyoyitungiye, C Sibomana, D Nahimana Current state of zooplankton diversity in the pelagic zone of Lake Tanganyika offshore of Bujumbura City S Ndikuriyo, Lambert Niyoyitungiye, C Sibomana, D Nahimana To cite this version: S Ndikuriyo, Lambert Niyoyitungiye, C Sibomana, D Nahimana. Current state of zooplankton di- versity in the pelagic zone of Lake Tanganyika offshore of Bujumbura City. International Journal of Bioscience, Biochemistry and Bioinformatics, 2021, 3 (1), pp.10-16. hal-03300028 HAL Id: hal-03300028 https://hal.archives-ouvertes.fr/hal-03300028 Submitted on 26 Jul 2021 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Copyright International Journal of Bioscience and Biochemistry www.biosciencejournal.net Online ISSN: 2664-6544, Print ISSN: 2664-6536 Received: 27-05-2021; Accepted: 12-06-2021; Published: 27-06-2021 Volume 3, Issue 1, 2021, Page No. 10-16 Current state of zooplankton diversity in the pelagic zone of Lake Tanganyika offshore of Bujumbura City Buhungu S1*, S Ndikuriyo1, L Niyoyitungiye1, C Sibomana1, D Nahimana2 1 Department of Biology, Faculty of Sciences, Natural Sciences and Environmental Research Center, University of Burundi, Bujumbura, Burundi 2 Department of Chemistry, Faculty of Sciences, Natural Sciences and Environmental Research Center, University of Burundi, Bujumbura, Burundi Abstract A study on the current state of zooplankton diversity in the pelagic zone of Lake Tanganyika along Bujumbura City was conducted from April to July 2020. The objective of the study was to assess zooplankton diversity for sustainable management of fishery resources and the conservation of this ecosystem. Two sampling sites were chosen. The first station was supposed to be polluted whereas the second one was considered as less polluted (or control). Zooplankton was collected with 50μm plankton net at different depths. The results obtained showed a total of 12 species identified in all the sampling stations among which, the copepods group was dominant while the rotifers group was found diversified with seven species (58.3%). The group of cladocerans represented by Moina macrocopa was identified for the first time in the pelagic zone. The calculation of the diversity index has reflected that the waters of Lake Tanganyika are classified into low level pollution category with a tolerable threshold. Therefore, the protection of Lake Tanganyika is necessary for sustainable fishery production and the future studies shall be carried out at several sites with annual sampling at a regular frequency to demonstrate the effect of seasons on the abundance of zooplankton communities. Keywords: zooplankton, diversity index, Lake Tanganyika, freshwater Introduction Lake Tanganyika is located between Burundi, Democratic Indeed, Lake Tanganyika ecosystem is threatened by several Republic of Congo, Tanzania, and Zambia. This lake is known evils leading to degradation and loss of its biodiversity and [1, 2, 3] for its high biodiversity and high fish production . With more biological richness [13, 14]. The increase of human population in than 2000 species of aquatic flora and fauna, of which at least 700 the riparian countries in general and especially in Burundi exerts are endemic [4], Lake Tanganyika is ranked among the richest freshwater ecosystems in the world [5]. an increasing pressure on this resource capable of satisfying The pelagic fauna of the Lake is mainly composed of commercial nutritional needs. The pollutants from the anthropogenic fish species, including six endemic species. These are two activities in Lake Tanganyika catchment have an impact on the Clupeidae and four species belonging to the genus Lates [6] which development of zooplankton [15]. Zooplankton is considered to be occupy the pelagic zone where they feed on phytoplankton and very sensitive and very responsive to the variations of zooplankton. Zooplankton, particularly copepods play a role in environmental conditions and climate change [16, 17]. Zooplankton fisheries management and aquaculture [7]. It is an important food species are also used as indicators of water pollution [18, 19, 20]. [8, 9] source for fish and plankton-like invertebrates . The Certain species of zooplankton disappear in the presence of high zooplankton of freshwater ecosystems is composed mainly of concentration of pollutants and the disappearance of zooplankton protozoa, rotifers, cladocerans, copepods and ostracods [10]. leads to the destruction of the lake's aquatic ecosystem resulting Thus, the zooplankton found in Lake Tanganyika is dominated in the extinction of certain species of carnivorous fish that feed by three large groups, namely the rotifers and the two subclasses on zooplankton [21]. of crustaceans (cladocerans and copepods) of which only the The main objective of this study was to assess the current state of copepods are truly pelagic. The only species representing the zooplankton diversity in the pelagic zone of Lake Tanganyika calanoids group in the pelagic zone is Tropodiaptomus simplex along Bujumbura City with a view to the sustainable management while the species Mesocyclops aequatorialis represents the and conservation of this resource. Cyclopoid group [11]. The other species are rarely or occasionally found in the pelagic zone (Coulter, 1991) [6]. In the northern part Material and Methods of Lake Tanganyika, the zooplankton community is dominated Study Area and Sampling Stations by cyclopoids and jellyfish where increased stratification results In the present study, two stations were selected. The first station in nutrient load decreasing. This process is favorable for smaller with GPS coordinates (S:3 ° 28 ’, E: 29 ° 17’) is located at 13.5km cyclopoid species. In the southern side, the amount of calanoids from the shore of Lake Tanganyika, along Nyamugari beach, in is greater than that one observed in the northern part due to higher the commune of Kabezi, Bujumbura Province. The second one concentration of diatoms which increases during ascent [11, 12]. with GPS coordinates (S:3 ° 22 ’, E:29 ° 19’) is located at 3.5 km 10 International Journal of Bioscience and Biochemistry www.biosciencejournal.net from the shore of Lake Tanganyika nearby REGIDESO water activities as it is receiving regularly the waters from both catchment point and off the port of Bujumbura. The two stations Mutimbuzi and Kinyankonge Rivers which are tributaries of have different characteristics (Figure 1). The one along Lake Tanganyika carrying the alkaline soils from the plain. Nyamugari beach was taken in the pelagic zone and served as Kinyankonge River is an outlet for Buterere wastewaters control station since it is less impacted by anthropogenic treatment plant. This second site is also affected by the activities. The other one located very close to the water catchment Ntahangwa River and to some extent by Rusizi River. area, north of the lake, was subject to be threatened by human Fig 1: Geographical location of the study area and sampling stations Sampling Analysis of Zooplankton Samples The samples for zooplankton study were collected during four The zooplanktonic species of Rotifers, Cladocerans and months from April to July 2020. This period covers part of the Copepods were identified under a binocular magnifier brand WF rainy season (April to May) and the dry season (June to July). 10X-18MM. The species identification was based on the specific Zooplankton was collected using plankton net of 50 µm-mesh morphological characters observable using different size and 26cm in diameter. According to the methodology of determination keys [22, 23, 24, 25, 26, 27]. Kurki [11], samples were taken vertically over the entire water Individuals of each identified species were also counted, the column at different depths and for better diving of the net to a counting effort being set at 400 individuals. Thus, the counting desired depth, a weight of known mass is attached to the plankton rate varied according to the abundance of the species until the net. The zooplankton organisms took about 3minutes to be sample was exhausted. The zooplankton density (number of accumulated in the net, then the net is raised up to the surface and individuals / liter) was obtained by dividing the number of taxa the drain pipe is opened and let the contents of the container flow obtained in the volume of water analyzed by the volume swept into the flask. Before proceeding to the next sampling, the net was by the plankton net in the water column of the lake according to rinsed with distilled water. The samples were preserved by the following relationship [28]: adding 5ml of 4% formalin solution and the operation was repeated until the desired number of samples is reached. D = (n *1000) / V 11 International Journal of Bioscience and Biochemistry www.biosciencejournal.net Where D: the density (expressed in individuals per liter), J = H' / log2 S n: the number of individuals found in the volume of water analyzed under the microscope, Where H': is the Shannon-Weaver index, V: the volume of water swept (in ml).The obtained results were log2: is the logarithm to base 2 and used to calculate the various indices which are helpful in S: is the number of species present. characterization of the composition and evolution of The J index varies from 0 (dominance of a single species) to 1 zooplankton. (even distribution of individuals in the stands). The Shannon-Weaver diversity index accounts for the diversity of the species that make up the stands in an environment. It Statistical Analysis establishes the link between the number of species and the One-way analysis of variance (ANOVA-1) pairwise Tukey number of individuals in the same ecosystem or in the same comparison was used to compare the means of the different community.
Load more

Recommended publications
  • Report of the Third Joint Meeting of the LTR's Coordination
    RESEARCH FOR THE MANAGEMENT OF THE FISHERIES ON LAKE GCP/RAF/271/FIN—TD/27 (En) TANGANYIKA GCP/RAF/271/FIN—TD/27 (En) December 1994 REPORT OF THE THIRD JOINT MEETING OF THE LTR’S COORDINATION AND INTERNATIONAL SCIENTIFIC COMMITTEES edited by G. HANEK AND E.J. COENEN FINNISH INTERNATIONAL DEVELOPMENT AGENCY FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Bujumbura, December 1994 The conclusions and recommendations given in this and other reports in the Research for the Management of the Fisheries on the Lake Tanganyika Project series are those considered appropriate at the time of preparation. They may be modified in the light of further knowledge gained at subsequent stages of the Project. The designations employed and the presentation of material in this publication do not imply the expression of any opinion on the part of FAO or FINNIDA concerning the legal status of any country, territory, city or area, or concerning the determination of its frontiers or boundaries. PREFACE The Research for the Management of the Fisheries on Lake Tanganyika Project (Lake Tanganyika Research) became fully operational in January 1992. It is executed by the Food and Agriculture Organization of the United Nations (FAO) and funded by the Finnish International Development Agency (FINNIDA) and the Arab Gulf Programme for United Nations Development Organizations (AGFUND). This project aims at the determination of the biological basis for fish production on Lake Tanganyika, in order to permit the formulation of a coherent lake-wide fisheries management policy for the four riparian States (Burundi, Tanzania, Zaïre and Zambia) Particular attention will be also given to the reinforcement of the skills and physical facilities of the fisheries research units in all four beneficiary countries as well as to the build— up of effective coordination mechanisms to ensure full collaboration between the Governments concerned.
    [Show full text]
  • On the Limnology of Lake Tanganyika
    On the limnology of Lake Tanganyika Victor T. Langenberg On the limnology of Lake Tanganyika Promotor: Prof dr M. Scheffer Hoogleraar Aquatische Ecologie en Waterkwaliteitsbeheer Wageningen Universiteit, Nederland Co-promotoren: Prof dr J. Sarvala Head of Department Biology, section of Ecology Universiteit van Turku, Finland Dr R.M.M. Roijackers Universitair Docent, leerstoelgroep Aquatische Ecologie en Waterkwaliteitsbeheer, Wageningen Universiteit, Nederland Prof dr A.A. Koelmans Persoonlijk hoogleraar bij de leerstoelgroep Aquatische Ecologie en Waterkwaliteitsbeheer, Wageningen Universiteit, Nederland Samenstelling promotiecommissie: Prof dr J-P Descy, Université de Namur, Belgium Prof dr J.A.J. Verreth, Wageningen Universiteit Dr J. Vijverberg, Nederlands instituut voor Ecologie, Nieuwersluis Dr P.C. Goudswaard, IMARES. Yerseke Dit onderzoek is uitgevoerd binnen de onderzoekschool WIMEK-SENSE On the limnology of Lake Tanganyika Victor Theodorus Langenberg Proefschrift Ter verkrijging van de graad van doctor Op gezag van de rector magnificus Van Wageningen Universiteit prof dr M.J. Kropff in het openbaar te verdedigen op vrijdag 14 maart 2008 des namiddags te vier uur in de aula V. T. Langenberg On the limnology of Lake Tanganyika Thesis Wageningen University, The Netherlands– with summary in Dutch and French ISBN 978-90-8504-784-1 Voor mijn ouders en mijn gezin Cover photos of R/V Tanganyika Explorer by V. T. Langenberg. Front: Light play through future door opening of wet laboratory including Greek chalk drawings of building scheme. Back: Trawling gear at the stern. Contents Chapter 1 General introduction 11 Chapter 2 Limnological annual cycle inferred from physical-chemical fluctuations at three stations of Lake Tanganyika. 21 Chapter 3 Comparison of thermal stratification, light attenuation and chlorophyll-a dynamics between the ends of Lake Tanganyika.
    [Show full text]
  • Limnological Study of Lake Tanganyika, Africa with Special Emphasis on Piscicultural Potentiality Lambert Niyoyitungiye
    Limnological Study of Lake Tanganyika, Africa with Special Emphasis on Piscicultural Potentiality Lambert Niyoyitungiye To cite this version: Lambert Niyoyitungiye. Limnological Study of Lake Tanganyika, Africa with Special Emphasis on Piscicultural Potentiality. Biodiversity and Ecology. Assam University Silchar (Inde), 2019. English. tel-02536191 HAL Id: tel-02536191 https://hal.archives-ouvertes.fr/tel-02536191 Submitted on 9 Apr 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. “LIMNOLOGICAL STUDY OF LAKE TANGANYIKA, AFRICA WITH SPECIAL EMPHASIS ON PISCICULTURAL POTENTIALITY” A THESIS SUBMITTED TO ASSAM UNIVERSITY FOR PARTIAL FULFILLMENT OF THE REQUIREMENT FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN LIFE SCIENCE AND BIOINFORMATICS By Lambert Niyoyitungiye (Ph.D. Registration No.Ph.D/3038/2016) Department of Life Science and Bioinformatics School of Life Sciences Assam University Silchar - 788011 India Under the Supervision of Dr.Anirudha Giri from Assam University, Silchar & Co-Supervision of Prof. Bhanu Prakash Mishra from Mizoram University, Aizawl Defence date: 17 September, 2019 To Almighty and merciful God & To My beloved parents with love i MEMBERS OF EXAMINATION BOARD iv Contents Niyoyitungiye, 2019 CONTENTS Page Numbers CHAPTER-I INTRODUCTION .............................................................. 1-7 I.1 Background and Motivation of the Study ..........................................
    [Show full text]
  • Food Resources of Lake Tanganyika Sardines Metabarcoding of the Stomach Content of Limnothrissa Miodon and Stolothrissa Tanganicae
    FACULTY OF SCIENCE Food resources of Lake Tanganyika sardines Metabarcoding of the stomach content of Limnothrissa miodon and Stolothrissa tanganicae Charlotte HUYGHE Supervisor: Prof. F. Volckaert Thesis presented in Laboratory of Biodiversity and Evolutionary Genomics fulfillment of the requirements Mentor: E. De Keyzer for the degree of Master of Science Laboratory of Biodiversity and Evolutionary in Biology Genomics Academic year 2018-2019 © Copyright by KU Leuven Without written permission of the promotors and the authors it is forbidden to reproduce or adapt in any form or by any means any part of this publication. Requests for obtaining the right to reproduce or utilize parts of this publication should be addressed to KU Leuven, Faculteit Wetenschappen, Geel Huis, Kasteelpark Arenberg 11 bus 2100, 3001 Leuven (Heverlee), Telephone +32 16 32 14 01. A written permission of the promotor is also required to use the methods, products, schematics and programs described in this work for industrial or commercial use, and for submitting this publication in scientific contests. i ii Acknowledgments First of all, I would like to thank my promotor Filip for giving me this opportunity and guiding me through the thesis. A very special thanks to my supervisor Els for helping and guiding me during every aspect of my thesis, from the sampling nights in the middle of Lake Tanganyika to the last review of my master thesis. Also a special thanks to Franz who helped me during the lab work and statistics but also guided me throughout the thesis. I am very grateful for all your help and advice during the past year.
    [Show full text]
  • The Impact of Abiotic Environmental Factors on the Occurrence
    The impact of abiotic environmental factors on the occurrence, assemblages and diversity of freshwater zooplanktons in lake tanganyika, burundian littoral Lambert Niyoyitungiye, Anirudha Giri, Bhanu Mishra, Devashish Kar To cite this version: Lambert Niyoyitungiye, Anirudha Giri, Bhanu Mishra, Devashish Kar. The impact of abiotic envi- ronmental factors on the occurrence, assemblages and diversity of freshwater zooplanktons in lake tanganyika, burundian littoral. International Journal of Entomology Research, Gupta Publications, 2020, 5 (5), pp.2455-4758. hal-02540891 HAL Id: hal-02540891 https://hal.archives-ouvertes.fr/hal-02540891 Submitted on 28 May 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. International Journal of Entomology Research International Journal of Entomology Research ISSN: 2455-4758; Impact Factor: RJIF 5.24 Received: 26-01-2020; Accepted: 27-02-2020; Published: 28-03-2020 www.entomologyjournals.com Volume 5; Issue 2; 2020; Page No. 74-82 The impact of abiotic environmental factors on the occurrence, assemblages and diversity
    [Show full text]
  • Composition and Seasonal Variations in Abundance of Copepod (Crustacea) Populations from the Northern Part of Lake Tanganyika
    Aquatic Ecosystem Health & Management ISSN: 1463-4988 (Print) 1539-4077 (Online) Journal homepage: http://www.tandfonline.com/loi/uaem20 Composition and seasonal variations in abundance of Copepod (Crustacea) populations from the northern part of Lake Tanganyika Déo Mushagalusa Cirhuza & Pierre-Denis Plisnier To cite this article: Déo Mushagalusa Cirhuza & Pierre-Denis Plisnier (2016) Composition and seasonal variations in abundance of Copepod (Crustacea) populations from the northern part of Lake Tanganyika, Aquatic Ecosystem Health & Management, 19:4, 401-410 To link to this article: http://dx.doi.org/10.1080/14634988.2016.1251277 Accepted author version posted online: 27 Oct 2016. Published online: 27 Oct 2016. Submit your article to this journal Article views: 17 View related articles View Crossmark data Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=uaem20 Download by: [196.2.8.2] Date: 22 December 2016, At: 23:40 Composition and seasonal variations in abundance of Copepod (Crustacea) populations from the northern part of Lake Tanganyika Deo Mushagalusa Cirhuza1,* and Pierre-Denis Plisnier2 1Department of Biology, Centre de Recherche en Hydrobiologie (CRH, Uvira), P.O. Box 73, Uvira, Democratic Republic of Congo 2Earth Sciences Department, Royal Museum for Central Africa, Tervuren, Belgium *Corresponding author: [email protected] Copepod has an important ecological role as a main food of several fishes on which commercial fisheries are based in Lake Tanganyika. However, very little multi-annual monitoring programs have been conducted for this group of crustacean zooplankton. This study was conducted in the northern part of Lake Tanganyika by weekly sampling at both pelagic and littoral sites over three consecutive years (2012–2014).
    [Show full text]
  • The Impact of Abiotic Environmental Factors on the Occurrence, Assemblages and Diversity of Freshwater Zooplanktons in Lake Tanganyika, Burundian Littoral
    International Journal of Entomology Research International Journal of Entomology Research ISSN: 2455-4758; Impact Factor: RJIF 5.24 Received: 26-01-2020; Accepted: 27-02-2020; Published: 28-03-2020 www.entomologyjournals.com Volume 5; Issue 2; 2020; Page No. 74-82 The impact of abiotic environmental factors on the occurrence, assemblages and diversity of freshwater zooplanktons in lake tanganyika, burundian littoral Lambert Niyoyitungiye1*, Anirudha Giri2, Bhanu Prakash Mishra3, Devashish Kar4 1-3 Department of Life Science and Bioinformatics, Assam University, Silchar, Assam State, India 1 Department of Environmental Science and Technology, Faculty of Agronomy and Bio- Engineering, University of Burundi, Bujumbura, Po Box.2940, Burundi 4 Department of Environmental Science, Mizoram University, Aizawl, Mizoram State, India Abstract The present study was conducted on Burundian coast of Lake Tanganyika in 4 sampling sites to identify and to estimate the spatial abundance of zooplankton community and to analyze whether physicochemical properties of water influence significantly the occurrence of zooplankton population. During the survey, it has been realized that zooplankton organisms were very few in number and taxonomic diversity and was comprising of 3 orders: Cyclopoida, Calanoida (Copepods) and Cladocera represented by Diaphanosoma. 12species belonging to 4families have been noted from all study sites. The relative diversity index of families revealed that the family Diaptomidae was dominant with 5species (41.7%) followed by family Cyclopidae with 4species (33.3%), then family Sididae with 2species (16.7%) while the Temoridae family was last with a single species (8.3%) The results of species richness and the Cumulative abundance of the sampling sites showed that zooplankton species and density were variable among stations.
    [Show full text]
  • LIMNOLOGICAL STUDY of LAKE TANGANYIKA, AFRICA with SPECIAL EMPHASIS on PISCICULTURAL POTENTIALITY Lambert Niyoyitungiye
    LIMNOLOGICAL STUDY OF LAKE TANGANYIKA, AFRICA WITH SPECIAL EMPHASIS ON PISCICULTURAL POTENTIALITY Lambert Niyoyitungiye To cite this version: Lambert Niyoyitungiye. LIMNOLOGICAL STUDY OF LAKE TANGANYIKA, AFRICA WITH SPECIAL EMPHASIS ON PISCICULTURAL POTENTIALITY. Biodiversity and Ecology. Assam University Silchar (Inde), 2019. English. tel-02536191 HAL Id: tel-02536191 https://hal.archives-ouvertes.fr/tel-02536191 Submitted on 9 Apr 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. “LIMNOLOGICAL STUDY OF LAKE TANGANYIKA, AFRICA WITH SPECIAL EMPHASIS ON PISCICULTURAL POTENTIALITY” A THESIS SUBMITTED TO ASSAM UNIVERSITY FOR PARTIAL FULFILLMENT OF THE REQUIREMENT FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN LIFE SCIENCE AND BIOINFORMATICS By Lambert Niyoyitungiye (Ph.D. Registration No.Ph.D/3038/2016) Department of Life Science and Bioinformatics School of Life Sciences Assam University Silchar - 788011 India Under the Supervision of Dr.Anirudha Giri from Assam University, Silchar & Co-Supervision of Prof. Bhanu Prakash Mishra from Mizoram University, Aizawl Defence date: 17 September, 2019 To Almighty and merciful God & To My beloved parents with love i MEMBERS OF EXAMINATION BOARD iv Contents Niyoyitungiye, 2019 CONTENTS Page Numbers CHAPTER-I INTRODUCTION .............................................................. 1-7 I.1 Background and Motivation of the Study ..........................................
    [Show full text]
  • Spatial Patterns of Zooplankton Distribution and Abundance
    SPATIAL PATTERNS OF ZOOPLANKTON DISTRIBUTION AND ABUNDANCE IN RELATION TO PHYTOPLANKTON, FISH CATCH AND SOME WATER QUALITY PARAMETERS AT SHIRATI BAY, LAKE VICTORIA-TANZANIA Revania K. Waya1§, Samwel M. Limbu3, Godfrey W. Ngupula2, Chacha J. Mwita3 and Yunus D. Mgaya3* 1Tanzania Fisheries Research Institute, P. O. Box 46, Shirati, Tanzania 2Tanzania Fisheries Research Institute, P. O. Box 475, Mwanza, Tanzania 3Department of Aquatic Sciences and Fisheries, University of Dar es Salaam, P. O. Box 35064, Dar es Salaam, Tanzania *Corresponding author, e-mail: [email protected] §The writing of this paper was completed posthumously. ABSTRACT Spatial patterns and abundance of zooplankton in aquatic habitats are important determinants for production of fish species, invertebrates and availability of phytoplankton. Weekly monitoring for zooplankton abundance was conducted in Shirati Bay, Lake Victoria, to explore their spatial patterns in relation to phytoplankton, fish catch and some water quality parameters. The vertical distribution of zooplankton was generally higher close to the bottom as compared to surface waters of the lake. Zooplankton vertical distribution positively correlated with water transparency (r = 0.680, p = 0.011). The horizontal abundance of zooplankton was not significantly different amongst the three stations (p = 0.5143). While Copepoda was the dominant group in terms of composition, Rotifera had the highest diversity indices of all the zooplankton groups obtained. The abundance of nauplius larvae was significantly higher than that of the copepodites (p = 0.022). Nile perch, Lates niloticus dominated the total catches (47%) followed by Nile tilapia, Oreochromis niloticus (29%) and haplochromines (21%). The abundance of haplochromines and juvenile fishes correlated significantly with the abundance of zooplankton (r = 0.856, p = 0.002 and r = 0.58, p = 0.038, respectively).
    [Show full text]
  • On the Limnology of Lake Tanganyika
    On the limnology of Lake Tanganyika Promotor: Prof dr M. Scheffer Hoogleraar Aquatische Ecologie en Waterkwaliteitsbeheer Wageningen Universiteit, Nederland Co-promotoren: Prof dr J. Sarvala Head of Department Biology, section of Ecology Universiteit van Turku, Finland Dr R.M.M. Roijackers Universitair Docent, leerstoelgroep Aquatische Ecologie en Waterkwaliteitsbeheer, Wageningen Universiteit, Nederland Prof dr A.A. Koelmans Persoonlijk hoogleraar bij de leerstoelgroep Aquatische Ecologie en Waterkwaliteitsbeheer, Wageningen Universiteit, Nederland Samenstelling promotiecommissie: Prof dr J-P Descy, Université de Namur, Belgium Prof dr J.A.J. Verreth, Wageningen Universiteit Dr J. Vijverberg, Nederlands instituut voor Ecologie, Nieuwersluis Dr P.C. Goudswaard, IMARES. Yerseke Dit onderzoek is uitgevoerd binnen de onderzoekschool WIMEK-SENSE On the limnology of Lake Tanganyika Victor Theodorus Langenberg Proefschrift Ter verkrijging van de graad van doctor Op gezag van de rector magnificus Van Wageningen Universiteit prof dr M.J. Kropff in het openbaar te verdedigen op vrijdag 14 maart 2008 des namiddags te vier uur in de aula V. T. Langenberg On the limnology of Lake Tanganyika Thesis Wageningen University, The Netherlands– with summary in Dutch and French ISBN 978-90-8504-784-1 Voor mijn ouders en mijn gezin Cover photos of R/V Tanganyika Explorer by V. T. Langenberg. Front: Light play through future door opening of wet laboratory including Greek chalk drawings of building scheme. Back: Trawling gear at the stern. Contents Chapter 1 General introduction 11 Chapter 2 Limnological annual cycle inferred from physical-chemical fluctuations at three stations of Lake Tanganyika. 21 Chapter 3 Comparison of thermal stratification, light attenuation and chlorophyll-a dynamics between the ends of Lake Tanganyika.
    [Show full text]
  • Study on Zooplankton Development Time at Lake Tanganyika
    RESEARCH FOR THE MANAGEMENT OF THE FISHERIES ON LAKE TANGANYIKA GCP/RAF/271/FIN-TD/78 (En) GCP/RAF/271/FIN-TD/78 (En) November 1997 STUDY ON ZOOPLANKTON DEVELOPMENT TIME AT LAKE TANGANYIKA by K. Hyvönen FINNISH INTERNATIONAL DEVELOPMENT AGENCY FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Bujumbura, November 1997 The conclusions and recommendations given in this and other reports in the Research for the Management of the Fisheries on the Lake Tanganyika Project series are those considered appropriate at the time of preparation. They may be modified in the light of further knowledge gained at subsequent stages of the Project. The designations employed and the presentation of material in this publication do not imply the expression of any opinion on the part of FAO or FINNIDA concerning the legal status of any country, territory, city or area, or concerning the determination of its frontiers or boundaries. PREFACE The Research for the Management of the Fisheries on Lake Tanganyika project (LTR) became fully operational in January 1992. It is executed by the Food and Agriculture Organization of the United Nations (FAO) and funded by the Finnish International Development Agency (FINNIDA) and the Arab Gulf Program for the United Nations Development Organization (AGFUND) LTR’s objective is the determination of the biological basis for fish production on Lake Tanganyika, in order to permit the formulation of a coherent lake-wide fisheries management policy for the four riparian States (Burundi, Tanzania, D. R. Congo and Zambia). Particular attention is given to the reinforcement of the skills and physical facilities of the fisheries research units in all four beneficiary countries as well as to the build-up of effective coordination mechanisms to ensure full collaboration between the Governments concerned.
    [Show full text]
  • The Results of Zooplankton Sampling at Three Locations in Lake Tanganyika: July 1993 - December 1995
    RESEARCH FOR THE MANAGEMENT OF THE FISHERIES ON LAKE TANGANYIKA GCP/RAF/271/FIN-TD/51 (En) GCP/RAF/271/FIN-TD/51(En) October 1996 THE RESULTS OF ZOOPLANKTON SAMPLING AT THREE LOCATIONS IN LAKE TANGANYIKA: JULY 1993 - DECEMBER 1995 by H. Kurki FINNISH INTERNATIONAL DEVELOPMENT AGENCY FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Bujumbura, October 1996 The conclusions and recommendations given in this and other reports in the Research for the Management of the Fisheries on the Lake Tanganyika Project series are those considered appropriate at the time of preparation. They may be modified in the light of further knowledge gained at subsequent stages of the Project. The designations employed and the presentation of material in this publication do not imply the expression of any opinion on the part of FAO or FINNIDA concerning the legal status of any country, territory, city or area, or concerning the determination of its frontiers or boundaries. PREFACE The Research for the Management of the Fisheries on Lake Tanganyika project (LTR) became fully operational in January 1992. It is executed by the Food and Agriculture Organization of the United Nations (FAO) and funded by the Finnish International Development Agency (FINNIDA) and the Arab Gulf Program for the United Nations Development Organization (AGFUND). LTR’s objective is the determination of the biological basis for fish production on Lake Tanganyika, in order to permit the formulation of a coherent lake-wide fisheries management policy for the four riparian States (Burundi, Tanzania, Zaïre and Zambia) Particular attention is given to the reinforcement of the skills and physical facilities of the fisheries research units in all four beneficiary countries as well as to the build-up of effective coordination mechanisms to ensure full collaboration between the Governments concerned.
    [Show full text]