DOCSLIB.ORG

Quantification of Human Impacts on Fish Assemblages in the Upper Volta Catchment, Burkina Faso

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

University of Natural Resources and Life Sciences, Vienna Universität für Bodenkultur Wien Department of Water, Atmosphere and Environment Department Wasser‐Atmosphäre‐Umwelt Institute of Hydrobiology and Aquatic Ecosystem Management Institut für Hydrobiologie und Gewässermanagement Quantification of human impacts on fish assemblages in the Upper Volta catchment, Burkina Faso A thesis submitted to the University of Natural Resources and Life Sciences, Vienna, Austria for the award of the „Master of Science“ (MSc) composed by Sebastian Stranzl ACADEMIC SUPERVISORS Ao.Univ.Prof. Dipl.‐Ing. Dr.nat.techn. Stefan SCHMUTZ Dipl.‐Ing. Dr. nat.techn. Andreas H. MELCHER University of Natural Resources and Life Sciences, Vienna, Austria Department of Water, Atmosphere and Environment Institute of Hydrobiology and Aquatic Ecosystem Management Dr. Adama OUEDA Université de Ouagadougou, Ouagadougou, Burkina Faso Laboratoire de Biologie et Ecologie Animale Vienna, May 2014 Acknowledgements I want to thank the OEAD for funding SUSFISH (Sustainable Management of Water and Fish Resources in Burkina Faso), a great APPEAR (Austrian Partnership Programme in Higher Education & Research for Development) program, in the frame of which I’ve been writing this thesis. Financially I’ve got a great support for my data collection in Burkina Faso from (1) the scholarship for short‐term scientific research work abroad (KUWI), managed by the center for international relations (ZIB) and funded by the University of Natural Resources and Applied Life Sciences, Vienna; and (2) the from the Burkinabe SUSFISH partners who organized our accommodation. Thanks to the local SUSFISH coordinator in Burkina Faso, Dr. Raymond Ouedraogo (Ministry of Research and Education, Ouagadougou) for support in all matters and friendship in Burkina Faso. The work could not have been made without the great cooperation between BOKU and the University of Ouagadougou and the organization talent of Dr. Adama Oueda. Many thanks to my supervisors Prof. Stefan Schmutz and Dr. Andreas Melcher. Dr. Melcher also coordinates the SUSFISH program and friendly supported me in all matters of writing this thesis. Prof. Moog ensured good mood during his stay in Burkina Faso and helped me in the final phase of my thesis. Thanks to Werner Macho for introducing me into and helping me with Quantum GIS. I want to highlight the cooperation and support of all our Burkinabe partners and colleagues who made this trip unforgettable. Tobias Musschoot, Gert Boden and Dr. Emmanuel Vreven were helping us with species determination. I want to thank my family for all the support they gave me all through my life. I also want to thank Theresa Theuretzbacher for her patience and motivation. Cooperation The fieldwork in Burkina Faso was conducted together with (1) the Austrian Applied Limnology students Paul Meulenbroek (fish) Daniel Trauner, and Thomas Koblinger (invertebrates), (2) with Burkinabe LAEB (Laboratory of Animal Ecology and Biology) students and (3) local fishermen, especially Noufou Bonkoungou aka DumDum who accompanied us on every field trip. I want to thank them for friendship and cooperation. Additionally to field work also species determination, analyses and writing of the introduction and methods was done in close cooperation with Paul Meulenbroek and Mano Komandan. Parts of this work (especially the chapters introduction and methods) were initially composed together with Paul Meulenbroek and Mano Komandan. 2 Abstract Fish is an important protein source for the population of Burkina Faso. However, overfishing, fragmentation, loss of habitat, agriculture and other human pressures decline the fish population’s diversity and biomass in the Burkinabe water bodies. Biological indices are essential for the assessment of water and ecosystem health and sustainable management to assure food security and healthy water bodies. The goal of this thesis is to characterize fish assemblages in the sampling area, to find out about human pressures on the fish community, to implement a fish, habitat and pressures database and to find species and metrics which react on pressures. The six sampling areas in the Nakambe catchment between the reservoir of Loumbila, North of Ouagadougou and the border of Ghana are exposed to pressure intensities. Altogether, 37 sites and 137 habitats were sampled. Each habitat was fished electrically and with a cast net. On site, adjacent landuse, stressors and physicochemical parameters were noted. With GIS, land use was refined, and migration barriers were identified. Most common families are Cichlidae and Cyprinidae, which together make out more than 50% of all caught individuals, whereas Anabantidae and Citharinidae are heavily endangered. The tested fish metrics react on the pressure intensity. This means, with increasing pressure, the fish stock decreases. Especially the relative abundance of Mormyridae show a distinct drop with the pressure intensity, while Cichlidae and Cyprinidae increase. Other authors (Hugueny et al. 1996; Anne, Lelek, and Tobias 1994) show the same trends. We also found some sentinel taxa like Auchenoglanis and Hydrocynus, which were only caught in low‐pressure sites. This work is a basis for a fish based assessment method in Burkina Faso, which will be implemented by Burkinabe students in the frame of the SUSFISH project, helping managers to protect their waters in West Africa. Keywords: Freshwater, Fish, Indicator taxa, Human impacts, Cast net, Electric fishing, Burkina Faso, West Africa 3 Abstract Fische sind eine wichtige Eiweißquelle für Burkina Fasos Bevölkerung. Überfischung, Fragmentierung, Lebensraumverlust, Landwirtschaft und andere menschliche Einflüsse führten zu einer Abnahme der Fischbiomasse und ‐biodiversität in Burkina Fasos Gewässern. Biologische Bewertungsmethoden sind wichtig für die Erhebung der Qualität von Wasser und Ökosystemen um die Ernährungssicherheit und gesunde Gewässer zu gewährleisten. Das Ziel dieser Arbeit ist eine Charakterisierung der Fischzusammensetzung im Untersuchungsgebiet und die Identifizierung von Stressoren und Zeigerarten, sowie die Implementierung einer Fisch, Habitat und Belastungsdatenbank. Die sechs Probengebiete im Nakambe Einzugsgebiet zwischen Loumbila nördlich von Ouagadougou und der ghanaischen Grenze sind unterschiedlichen Belastungsintensitäten ausgesetzt. Es wurden 37 Probestellen und 137 Habitate beprobt. Jedes Habitat wurde elektrisch und mit einem Wurfnetz befischt. Vor Ort wurden die angrenzende Landnutzung, Stressoren und physikalisch‐chemische Parameter erhoben. Mithilfe von GIS wurden die Landnutzung und das Vorkommen von Migrationsbarrieren überprüft. Die häufigsten Familien waren Cichlidae und Cyprinidae die gemeinsam über 50% der gefangenen Individuen ausmachen. Anabantidae und Citharinidae sind stark gefährdet. Die getesteten Fisch‐metrics reagieren auf die Belastungsintensität, mit zunehmender Belastung nimmt auch der Fischbestand ab. Besonders Mormyridae haben eine starke Abnahme mit der Belastungsintensität, während Cichlidae und Cyprinidae zunehmen. Andere Autoren (Hugueny et al. 1996; Anne, Lelek, and Tobias 1994) zeigen dieselben Trends. Wir fanden auch einige Zeigertaxa wie Auchenoglanis und Hydrocynus die nur in wenig belasteten Probestellen gefangen wurden. Diese Arbeit kann eine Basis für einen Fischindex für Burkina Faso darstellen, der im Rahmen des SUSFISH Projekts von Studierenden aus Burkina Faso erstellt wird um das Management der Gewässer in West Afrika zu erleichtern. Stichwörter: Süßwasser, Fisch, Indikator Taxa, menschliche Belastungen, Wurfnetz, Elektrofischen, Burkina Faso, West Afrika 4 5 Table of content 1. INTRODUCTION ............................................................................................................. 8 BURKINA FASO ......................................................................................................................... 9 CATCHMENTS, HYDROLOGY ......................................................................................................... 9 ANTHROPOGENIC PRESSURES IN BURKINA FASO ............................................................................. 12 FISH AS BIOINDICATORS ............................................................................................................ 12 SPECIFIC AFRICAN PROBLEMS ..................................................................................................... 13 THE SUSFISH PROJECT ............................................................................................................ 13 2. METHODS .................................................................................................................... 16 STUDY AREA, SAMPLING SITE SELECTION AND WORKFLOW ................................................................. 16 FIELD SAMPLING – ENVIRONMENTAL DATA .................................................................................... 20 FIELD SAMPLING: FISH DATA ...................................................................................................... 24 SPECIES DETERMINATION .......................................................................................................... 25 DATA HANDLING AND STATISTICAL ANALYSIS .................................................................................. 25 METRIC CALCULATIONS ............................................................................................................ 29 3. RESULTS .....................................................................................................................
Recommended publications
  • Citharinus Citharus in Anambra River Flood System, Southeastern Nigeria

    Citharinus Citharus in Anambra River Flood System, Southeastern Nigeria

    American Journal of Agricultural Science 2015; 2(2): 63-69 Published online April 10, 2015 (http://www.aascit.org/journal/ajas) Gut Helminth Parasites of Citharinus citharus in Anambra River Flood System, Southeastern Nigeria Uneke Bilikis Iyabo Fisheries and Hydrobiology, Dept of Applied Biology, Faculty of Biological Sciences, Ebonyi State University, Abakaliki, Ebonyi State, Nigeria Email address [email protected] Citation Keywords Uneke Bilikis Iyabo. Gut Helminth Parasites of Citharinus citharus in Anambra River Flood Citharinus citharus , System, Southeastern Nigeria. American Journal of Agricultural Science. Prevalence, Vol. 2, No. 2, 2015, pp. 63-69. Gut Helminth Parasites, Procamallanus Laeviconchus, Abstract Cithariniella citharini , A total of forty (40) Citharinus citharus (Geoffroy Saint-Hilaire, 1809), order Infection Rate, (Characiformes) and family (Citharinidae) were purchased randomly from local Nigeria fishermen who fished in Anambra River from May to October 2012 and examined for the gut helminth parasites. Macroscopic and microscopic examinations were used for parasite isolation and identification. Ten (25.0%) of the fish examined were infected with the two species of helminth parasites Procamallanus laeviconchus and Cithariniella Received: March 19, 2015 citharini . The parasites were isolated which were restricted to the intestine, except for P. Revised: March 30, 2015 laeviconchus , which was also found in the oesophagus and stomach. P. laeviconchus was Accepted: March 31, 2015 identified in the majority of the fish with a prevalence rate of 15.0% while C. citharini was identified in the minority with an infection rate of 10.0%. The highest prevalence (30.0%) of the helminth infection was recorded in fish with total lengths ranging from 35cm-39.9cm while those with lengths ranging from 20cm-24.9cm recorded the lowest prevalence (11.7%).
  • 'Whedo'‐Aquaculture‐System in Malanville (North of Benin)

    'Whedo'‐Aquaculture‐System in Malanville (North of Benin)

    Description and Improvement of the ‘Whedo’‐Aquaculture‐System in Malanville (North of Benin) DISSERTATION ZUR ERLANGUNG DES NATURWISSENSCHAFTLICHEN DOKTORGRADES DER BAYERISCHEN JULIUS‐MAXIMILIANS‐UNIVERSTITÄT WÜRZBURG VORGELEGT VON MELANIE E. HAUBER GEBOREN IN SINGEN AM HOHENTWIEL WÜRZBURG May 2011 Eingereicht am: Mitglieder der Prüfungskommission: Vorsitzender: Prof. Dr. Th. Dandekar 1. Gutachter: Prof. Dr. K. Eduard Linsenmair 2. Gutachter: Prof. Dr. J. Tautz Tag des Promotionskolloquiums: Doktorurkunde ausgehändigt am: Gewässer, ihr seid diejenigen, die uns Lebenskraft geben. Helft uns Nahrung zu finden, so dass wir andere mit großer Freude betrachten können. (Rama Kishan Sharma) TABLE OF CONTENTS LIST OF FIGURES 9 LIST OF TABLES 12 LIST OF ABBREVIATIONS 15 CHAPTER I GENERAL INTRODUCTION AND STUDY SITE 1. THE PRESENT STATE OF THE WORLD FISHERY 18 2. THE IMPORTANCE OF FISH AS PROTEIN SOURCE, ESPECIALLY IN AFRICA 19 3. FISHERY – IMPORTANCE TO THE POPULATION AND THREATS TO ITS SUSTAINABILITY 22 4. AQUACULTURE 24 4.1 DEFINITION 25 4.2 HISTORY OF AQUACULTURE 25 4.3 AQUACULTURE – HOPE OR THREAT TO NATURAL RESOURCES? 26 4.4 WHAT KIND OF AQUACULTURE IS APPROPRIATE FOR SUB‐SAHARAN AFRICA? 28 4.5 IMPORTANCE OF SMALL‐SCALE FISH FARMING 29 5. CURRENT INFORMATION ON THE STUDY SITE 31 5.1 BENIN 31 5.2 MALANVILLE 32 6. PERSPECTIVES AND OUTLINE OF THE THESIS 34 7. REFERENCES 37 CHAPTER II ECOLOGY OF THE WHEDO­AQUACULTURE­SYSTEM 1. INTRODUCTION 42 1.1 NOTES ON THE STUDY AREA AND THE RIVERS NIGER AND SOTA 42 1.1.1 CLIMATE 42 1.1.2 HYDROLOGY 43 1.1.3 LAND USE 44 2.
  • Tempo and Mode of Lineage and Morphological Diversification in a Hyperdiverse Freshwater Fish Radiation (Teleostei: Characiformes)

    Tempo and Mode of Lineage and Morphological Diversification in a Hyperdiverse Freshwater Fish Radiation (Teleostei: Characiformes)

    AN ABSTRACT OF THE DISSERTATION OF Michael D. Burns for the degree of Doctor of Philosophy in Fisheries Science presented on April 17, 2018. Title: Tempo and Mode of Lineage and Morphological Diversification in a Hyperdiverse Freshwater Fish Radiation (Teleostei: Characiformes) Abstract approved: ________________________________________________ Brian L. Sidlauskas Characiform fishes form one of the most diverse freshwater fish clades in the world. Comprising more than 2000 species and distributed primarily in South America and Africa, characiforms vary dramatically in their ecomorphology. However, the evolutionary processes responsible for the immense ecomorphological diversity remains unknown. Recently, a study postulated that the unparalleled ecomorphological diversification arose through an ancient adaptive radiation, as evidenced by the clear segregation of morphological traits, such as body shape, among different trophic and habitat groups. However, no formal macroevolutionary analyses have been conducted on the entire order of Characiformes and the mechanism responsible for the diversity remains unknown. Here, I conduct a macroevolutionary analysis of body shape diversification to determine if Characiformes evolved through an adaptive radiation. I estimated the first time-calibrated molecular phylogeny for the order Characiformes, assembled the first ever geometric morphometric body shape dataset, and compiled an exhaustive trophic ecology database. In my second chapter, I combined these datasets to test whether body shape adapted
  • Taxonomy and Systematics the Inland Water Fishes of Africa

    Taxonomy and Systematics the Inland Water Fishes of Africa

    Taxonomy and systematics The inland water fishes of Africa l xonom y is the science of naming and describing organisms. It is a highly formalized science whose rules are established and revised regularly by an International Commission of Zoological Nomenclature created in 1895. The International Code of Zoological Nomenclature contains all the rules for designating animal species which are the same for all zoological groups. One of its basic principles is that the first name given to a species has priority over the others. It is not uncommon for taxonomic revisions of a group to reveal that some species had been described under different names, because the authors did not have access to all available informa­ tion or had made an error. In these conditions, the so-called priority rule must be applied. This sometimes leads to a change in the name used for the species up to that time. The situation may prove ev en more complex, as illustrated by the case of Schilbe mystus (see box " W ho is Schilbe mystus?"). Another well-known case of ambiguity is that of the mounted holotype of Synodontis xiphias described in 1864 by Gunther, which has a long and pointed snout similar to a swordfish. The species had never been recorded since then, for a perfectly good reason: an x-ray showed that the long snout was a fake nose, resulting from a metal frame used in mounting the animal (Poll, 1971) (figure 8.1). The holotype of Synodontis labeo Gunther, 1865, described later, belongs to the same species, but the name S.

  • Fish Species Composition and Morphological Descriptions of Five Dominant Families from Inland Waters of Kebbi State-Nigeria

    Asian Journal of Fisheries and Aquatic Research 3(1): 1-8, 2019; Article no.AJFAR.47271 Fish Species Composition and Morphological Descriptions of Five Dominant Families from Inland Waters of Kebbi State-Nigeria D. Y. Bawaa1*, S. M. Nurul Amin2, Aziz bin Arshad2, Fatimah Md Yusoff2 and L. A. Argungu3 1Department of Fisheries, Kebbi State University of Science and Technology, Aliero, Nigeria. 2Department of Aquaculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia. 3Department of Fisheries and Aquaculture, Usmanu Danfodiyo University, Sokoto, Nigeria. Authors’ contributions This work was carried out in collaboration among all authors. Authors DYB and SMNA designed the study, performed the statistical analysis and wrote the first draft of the manuscript. Authors ABA and FMY managed the analyses of the study. Author LAA managed the literature searches. All authors read and approved the final manuscript. Article Information DOI: 10.9734/AJFAR/2019/v3i130024 Editor(s): (1) Forcep Rio Indaryanto, Lecturer, Department of Fisheries, University of Sultan Ageng Tritayasa, Indonesia. Reviewers: (1) Ali Türker, Mugla Sitki Kocman University, Turkey. (2) Godwin S. Adaka, Federal University of Technology, Nigeria. (3) Theodoros Mavraganis, Holar University College, Iceland. Complete Peer review History: http://www.sdiarticle3.com/review-history/47271 Received 19 December 2018 Accepted 08 March 2019 Original Research Article Published 30 March 2019 ABSTRACT A study was conducted on fish species composition and morphological features of five dominant fish families from the inland waters of Kebbi state, Nigeria between January and December 2017. Three major fishing communities (Argungu, Sabiyel and Yauri) were selected for the study. Fish samples were qualitatively collected from the commercial landings of the fishermen using gill nets.
  • Common Marine and Inland Fish Species in the Gambia

    Common Marine and Inland Fish Species in the Gambia

    THE REPUBLIC OF THE GAMBIA THE COMMON MARINE AND INLAND FISH SPECIES IN THE GAMBIA Data Obtained from the Fish Base Website and the local names provided by the Department of Fisheries GAMBIA ARTISANAL FISHERIES DEVELOPMENT PROJECT DEPARTMENT OF FISHERIES DEPARTMENT OF STATE FOR FISHERIES AND WATER RESOURCES BANJUL, THE GAMBIA Table of Contents MARINE FISH SPECIES ............................................................................................ 4 1. BONGA SHAD/KOBO .......................................................................................... 4 2. Madeiran Sardinella ................................................................................................ 5 3. Sardinella aurita ...................................................................................................... 6 4. Longneck croaker.................................................................................................... 7 5. Law croaker ............................................................................................................ 8 6. Cassava croaker ...................................................................................................... 9 7. Bobo croaker ......................................................................................................... 10 8. Rubberlip grunt ..................................................................................................... 11 9. Sompat grunt ........................................................................................................
  • IUCN Red List of Threatened Species™ – Regional Assessment –Regional Species™ Threatened of List Red IUCN the N

    IUCN Red List of Threatened Species™ – Regional Assessment –Regional Species™ Threatened of List Red IUCN the N

    THE STATUS AND DISTRIBUTION OF FRESHWATER BIODIVERSITY IN NORTHERN AFRICA N. García, A. Cuttelod and D. Abdul Malak NORTHERN AFRICA NORTHERN The IUCN Red List of Threatened Species™ – Regional Assessment THE STATUS AND DISTRIBUTION OF FRESHWATER BIODIVERSITY IN NORTHERN AFRICA N. García, A. Cuttelod and D. Abdul Malak The IUCN Red List of Threatened Species™ – Regional Assessment The designation of geographical entities in this book, and the presentation of the material, do not imply the expression of any opinion whatsoever on the part of IUCN concerning the legal status of any country, territory, or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries. The views expressed in this publication do not necessarily reflect those of IUCN, or other participating organizations. Published by: IUCN, Gland, Switzerland, Cambridge, UK, and Malaga, Spain Copyright: © 2010 International Union for Conservation of Nature and Natural Resources Reproduction of this publication for educational or other non-commercial purposes is authorized without prior written permission from the copyright holder provided the sources are fully acknowledged. Reproduction of this publication for resale or other commercial purposes is prohibited without prior written permission of the copyright holder. Red List logo: © 2008 Citation: García, N., Cuttelod, A. and Abdul Malak, D. (eds.) (2010). The Status and Distribution of Freshwater Biodiversity in Northern Africa. Gland, Switzerland, Cambridge, UK, and Malaga, Spain : IUCN, 2010. xiii+141pp. ISBN: 978-2-8317-1271-0 Legal Deposit: Cover design: IUCN Centre for Mediterranean Cooperation Cover photo: © Pedro Regato Illustrations : Ahmed Gheith (email: [email protected]) All photographs used in this publication remain the property of the original copyright holder (see individual captions for details).
  • Citharinus Citharus ERSS

    Citharinus Citharus ERSS

    Citharinus citharus (a fish, no common name) Ecological Risk Screening Summary U.S. Fish & Wildlife Service, August 2011 Revised, January 2019 Web Version, 10/18/2019 Drawing: G. A. Boulenger and L. Loat. Licensed under Creative Commons BY-SA 3.0. Available: https://commons.wikimedia.org/wiki/File:The_fishes_of_the_Nile_(Pl._XXV)_(6815493820).jp g (January 2019). 1 Native Range and Status in the United States Native Range From Froese and Pauly (2019): “Africa: Gambia [Senegal], Senegal [Senegal], Niger [Burkina Faso, Guinea, Mali, Niger], Volta [Burkina Faso, Ghana, Togo], Ouémé [Benin] and Chad [Chad, Niger] basins [Daget 1984; Gosse 1990; Gosse and Paugy 2003]. Also known from Lake Turkana [Kenya] [Daget 1984; Gosse 1990] and Lake Albert [Greenwood 1966].” 1 “Found in Bénué and Chad basin [in Cameroon] [Gosse 1990; Vivien 1991; Gosse and Paugy 2003].” “Known from the Baro basin [in Ethiopia] [Getahun 2007].” “Known from the Géba River [in Guinea-Bissau and Senegal] [Gosse 1990; Paugy et al. 1994; Gosse and Paugy 2003].” “Widely distributed in Nigeria [Olaosebikan and Raji 1998]. Occurs in Niger Delta, Lower Niger, Bénué, Cross and Chad basin [Gosse 1990; Gosse and Paugy 2003]. Also present in Ehoma Floodplain, Afikpo [Oti 2003]. Commercial in Kainji Lake [Anonymous 1998].” “Occurs in the Ghazal and Jebel systems, White and Blue Nile, Nile to Lake Nubia [in Sudan] [Bailey 1994].” “Common in large rivers of the Sudan region [Daget 1984]” “Known from Lake Albert, Albert Nile and Murchinson Nile [in Uganda] [Greenwood 1966].” Froese and Pauly (2019) also report Citharinus citharus as native to Gambia and Mauritania.
  • Studies on the Biology of Silver Catfish (Chrysichthys Nigrodigitatus Lacèpède 1803) in Jebba Lake, Nigeria

    Studies on the Biology of Silver Catfish (Chrysichthys Nigrodigitatus Lacèpède 1803) in Jebba Lake, Nigeria

    STUDIES ON THE BIOLOGY OF SILVER CATFISH (CHRYSICHTHYS NIGRODIGITATUS LACÈPÈDE 1803) IN JEBBA LAKE, NIGERIA BY Innocent Yakubu YEM, B. Sc (BUK), M. Sc (ABU) Ph.D/SCIE/10692/2007-2008 A THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES, AHMADU BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF DOCTOR OF PHILOSOPHY DEGREE IN FISHERIES DEPARTMENT OF BIOLOGICAL SCIENCES, FACULTY OF SCIENCE, AHMADU BELLO UNIVERSITY, ZARIA - NIGERIA JUNE, 2014 DECLARATION I declare that this work in this dissertation entitled "Studies on the biology of silver catfish, Chrysichthys nigrodigitatus (Lacèpède, 1803) in Jebba Lake, Nigeria" has been performed by me in the Department of Biological Sciences. The information derived from the literature has been duly acknowledged in the text and a list of references provided. No part of this dissertation was previously presented for another degree or diploma at this or any other institution. Innocent Yakubu YEM Name of Student Signature Date ii CERTIFICATION This dissertation entitled "STUDIES ON THE BIOLOGY OF SILVER CATFISH, CHRYSICHTHYS NIGRODIGITATUS (LACÈPÈDE, 1803) IN JEBBA LAKE, NIGERIA" by Innocent Yakubu YEM meets the regulations governing the award of the degree of Doctor of Philosophy of the Ahmadu Bello University, and is approved for its contribution to knowledge and literary presentation. Prof. J. K. Balogun Chairman, Supervisory Committee Signature Date Department of Biological Sciences, Ahmadu Bello University, Zaria Prof. J. Auta Member, Supervisory Committee Signature Date Department of Biological Sciences, Ahmadu Bello University, Zaria Dr. N. O. Bankole Member, Supervisory Committee Signature Date Natural Resources Management, National Institute for Freshwater Fisheries Research, New-Bussa Prof.
  • Ichthyofaunal Diversity of the Omo-Turkana Basin, East Africa, with Specific Reference to Fish Diversity Within the Limits of Ethiopian Waters

    Ichthyofaunal Diversity of the Omo-Turkana Basin, East Africa, with Specific Reference to Fish Diversity Within the Limits of Ethiopian Waters

    13 2 2059 the journal of biodiversity data 4 March 2017 Check List ANNOTATED LIST OF SPECIES Check List 13(2): 2059, 4 March 2017 doi: https://doi.org/10.15560/13.2.2059 ISSN 1809-127X © 2017 Check List and Authors Ichthyofaunal diversity of the Omo-Turkana basin, East Africa, with specific reference to fish diversity within the limits of Ethiopian waters Mulugeta Wakjira1, 3 & Abebe Getahun2 1 Jimma University, College of Natural Sciences, Department of Biology, P.O. Box 378, Jimma, Ethiopia 2 Addis Ababa University, College of Natural Sciences, Department of Zoological Sciences, P.O. Box 1176, Addis Ababa, Ethiopia 3 Corresponding author. E-mail: [email protected] Abstract: The freshwaters of the East African nation of (Boulenger 1903a). A few years later, 14 species from Ethiopia are divided into nine main drainage basins. One the middle to upper Omo River, and five species from of these, the Omo-Turkana basin, spans a large part of northeastern Lake Turkana were identified from the southwestern Ethiopian highlands and northern Kenya, collections of W. N. McMillan and Zaphiro (Boulenger and consists of the Omo-Gibe (or simply, Omo) River and a 1906). At the same time, Pellegrin (1905) identified four northern portion of Lake Turkana. Despite some develop- species from Lake Turkana in the collections of Maurice ment activities, including proposed dam construction with de Rothschild from 1904–1905. The first organized potential impacts on ichthyofaunal diversity, the Ethiopian expedition to the Omo-Turkana basin was undertaken by part of the basin generally lacks comprehensive study or Cambridge University in 1930–31 (Worthington 1931, full scientific documentation.
  • Fish from West African Estuaries, Lagoons and Reservoirs

    Fish from West African Estuaries, Lagoons and Reservoirs

    Biodiversity Data Journal 7: e31374 doi: 10.3897/BDJ.7.e31374 Data Paper The PPEAO experimental fishing dataset: Fish from West African estuaries, lagoons and reservoirs Monique Simier‡, Jean-Marc Ecoutin§, Luis Tito de Morais§ ‡ MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France § LEMAR, IRD, Univ BREST, CNRS, Ifremer, Plouzané, France Corresponding author: Monique Simier ([email protected]) Academic editor: Felipe Ottoni Received: 05 Nov 2018 | Accepted: 31 Jan 2019 | Published: 14 Feb 2019 Citation: Simier M, Ecoutin J, Tito de Morais L (2019) The PPEAO experimental fishing dataset: Fish from West African estuaries, lagoons and reservoirs. Biodiversity Data Journal 7: e31374. https://doi.org/10.3897/BDJ.7.e31374 Abstract Background This paper describes a dataset of fish, crustacean and mollusc occurrences extracted from the “Experimental Fishing” section of the IRD's PPEAO information system. PPEAO stands for “Fish communities and artisanal fisheries of West African estuarine, lagoon and freshwater ecosystems”. This database contains information collected using two different methods: experimental fishing and surveys of the artisanal fisheries that exploit these ecosystems. The database is accessible at http://ppeao.ird.fr. New information The current dataset is available on GBIF.org at 10.15468/ra4voa. It comprises the occurrences of 314 fish, crustacean and mollusc taxa collected in experimental sampling surveys of different aquatic ecosystems in West Africa between 1979 and 2013. Different types of fishing gear were used including purse seines, gill nets and fyke nets. The taxa were identified by IRD scientists or by scientific partners well trained in systematics. Most taxa were identified at species level (97% of cases).
  • Biology, Fisheries and Conservation Status Biology, Fisheries And

    Biology, Fisheries and Conservation Status Biology, Fisheries And

    Migratory Fishes of South America Biology, Fisheries and Conservation Status Edited by Joachim Carolsfeld Brian Harvey Carmen Ross Anton Baer Migratory Fishes of South America Migratory Fishes of South America Biology, Fisheries and Conservation Status Edited by Joachim Carolsfeld Brian Harvey Carmen Ross Anton Baer WORLD FISHERIES The World Bank TRUST International Development Research Centre Ottawa • Cairo • Dakar • Montevideo • Nairobi • New Delhi • Singapore World Fisheries Trust 204–1208 Wharf Street, Victoria, BC, Canada V8W 3B9 http://www.worldfish.org • [email protected] The International Bank for Reconstruction and Development / The World Bank 1818 H Street, NW, Washington, DC 20433 USA http://www.worldbank.org • [email protected] • Tel: 202-473-1000 International Development Research Centre PO Box 8500, Ottawa, ON, Canada K1G 3H9 http://www.idrc.ca / • [email protected] © 2003 The International Bank for Reconstruction and Development / The World Bank The findings, interpretations and conclusions expressed herein are those of the author(s) and do not necessarily reflect the views of the Board of Executive Directors of the World Bank or the governments they represent. The World Bank does not guarantee the accuracy of the data included in this work. The boundaries, colours, denominations, and other information shown on any map in this work do not imply any judgement on the part of the World Bank concerning the legal status of any territory or the endorsement or acceptance of such boundaries. Rights and Permissions The material in this work is copyrighted. Copying and/or transmitting portions or all of this work without permission may be a violation of applicable law.