Ecological Parameters of Selected Helminth
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The Effect of Water Temperature on Aquatic Organisms: a Review of Knowledge and Methods for Assessing Biotic Responses to Temperature
The effect of water temperature on aquatic organisms: a review of knowledge and methods for assessing biotic responses to temperature Report to the Water Research Commission by Helen Dallas The Freshwater Consulting Group Freshwater Research Unit Department of Zoology University of Cape Town WRC Report No. KV 213/09 30 28 26 24 22 C) o 20 18 16 14 Temperature ( 12 10 8 6 4 Jul '92 Jul Oct '91 Apr '92 Jun '92 Jan '93 Mar '92 Feb '92 Feb '93 Aug '91 Nov '91 Nov '91 Dec Aug '92 Sep '92 '92 Nov '92 Dec May '92 Sept '91 Month and Year i Obtainable from Water Research Commission Private Bag X03 GEZINA, 0031 [email protected] The publication of this report emanates from a project entitled: The effect of water temperature on aquatic organisms: A review of knowledge and methods for assessing biotic responses to temperature (WRC project no K8/690). DISCLAIMER This report has been reviewed by the Water Research Commission (WRC) and approved for publication. Approval does not signify that the contents necessarily reflect the views and policies of the WRC, nor does mention of trade names or commercial products constitute endorsement or recommendation for use ISBN978-1-77005-731-9 Printed in the Republic of South Africa ii Preface This report comprises five deliverables for the one-year consultancy project to the Water Research Commission, entitled “The effect of water temperature on aquatic organisms – a review of knowledge and methods for assessing biotic responses to temperature” (K8-690). Deliverable 1 (Chapter 1) is a literature review aimed at consolidating available information pertaining to water temperature in aquatic ecosystems. -
The Global Status of Freshwater Fish Age Validation Studies and a Prioritization Framework for Further Research Jonathan J
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Nebraska Cooperative Fish & Wildlife Research Nebraska Cooperative Fish & Wildlife Research Unit -- Staff ubP lications Unit 2015 The Global Status of Freshwater Fish Age Validation Studies and a Prioritization Framework for Further Research Jonathan J. Spurgeon University of Nebraska–Lincoln, [email protected] Martin J. Hamel University of Nebraska-Lincoln, [email protected] Kevin L. Pope U.S. Geological Survey—Nebraska Cooperative Fish and Wildlife Research Unit,, [email protected] Mark A. Pegg University of Nebraska-Lincoln, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/ncfwrustaff Part of the Aquaculture and Fisheries Commons, Environmental Indicators and Impact Assessment Commons, Environmental Monitoring Commons, Natural Resource Economics Commons, Natural Resources and Conservation Commons, and the Water Resource Management Commons Spurgeon, Jonathan J.; Hamel, Martin J.; Pope, Kevin L.; and Pegg, Mark A., "The Global Status of Freshwater Fish Age Validation Studies and a Prioritization Framework for Further Research" (2015). Nebraska Cooperative Fish & Wildlife Research Unit -- Staff Publications. 203. http://digitalcommons.unl.edu/ncfwrustaff/203 This Article is brought to you for free and open access by the Nebraska Cooperative Fish & Wildlife Research Unit at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Nebraska Cooperative Fish & Wildlife Research Unit -- Staff ubP lications by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Reviews in Fisheries Science & Aquaculture, 23:329–345, 2015 CopyrightO c Taylor & Francis Group, LLC ISSN: 2330-8249 print / 2330-8257 online DOI: 10.1080/23308249.2015.1068737 The Global Status of Freshwater Fish Age Validation Studies and a Prioritization Framework for Further Research JONATHAN J. -
Jlb Smith Institute of Ichthyology
ISSN 0075-2088 J.L.B. SMITH INSTITUTE OF ICHTHYOLOGY GRAHAMSTOWN, SOUTH AFRICA SPECIAL PUBLICATION No. 56 SCIENTIFIC AND COMMON NAMES OF SOUTHERN AFRICAN FRESHWATER FISHES by Paul H. Skelton November 1993 SERIAL PUBLICATIONS o f THE J.L.B. SMITH INSTITUTE OF ICHTHYOLOGY The Institute publishes original research on the systematics, zoogeography, ecology, biology and conservation of fishes. Manuscripts on ancillary subjects (aquaculture, fishery biology, historical ichthyology and archaeology pertaining to fishes) will be considered subject to the availability of publication funds. Two series are produced at irregular intervals: the Special Publication series and the Ichthyological Bulletin series. Acceptance of manuscripts for publication is subject to the approval of reviewers from outside the Institute. Priority is given to papers by staff of the Institute, but manuscripts from outside the Institute will be considered if they are pertinent to the work of the Institute. Colour illustrations can be printed at the expense of the author. Publications of the Institute are available by subscription or in exchange for publi cations of other institutions. Lists of the Institute’s publications are available from the Publications Secretary at the address below. INSTRUCTIONS TO AUTHORS Manuscripts shorter than 30 pages will generally be published in the Special Publications series; longer papers will be considered for the Ichthyological Bulletin series. Please follow the layout and format of a recent Bulletin or Special Publication. Manuscripts must be submitted in duplicate to the Editor, J.L.B. Smith Institute of Ichthyology, Private Bag 1015, Grahamstown 6140, South Africa. The typescript must be double-spaced throughout with 25 mm margins all round. -
Feeding Habits and Trace Metal Concentrations in the Muscle of Lapping Minnow Garra Quadrimaculata (Rüppell, 1835) (Pisces: Cyprinidae) in Lake Hawassa, Ethiopia
Research Article http://dx.doi.org/10.4314/mejs.v8i2.2 Feeding habits and trace metal concentrations in the muscle of lapping minnow Garra quadrimaculata (Rüppell, 1835) (Pisces: Cyprinidae) in Lake Hawassa, Ethiopia Yosef Tekle-Giorgis1*, Hiwot Yilma2 and Elias Dadebo2 1School of Animal and Range Sciences, College of Agriculture, P.O. Box 336, Hawassa University, Hawassa, Ethiopia (*[email protected]). 2Department of Biology, College of Natural and Computational Sciences, P.O. Box 5, Hawassa University, Hawassa, Ethiopia. ABSTRACT Diet composition and trace metal concentration in the muscle of the lapping minnow Garra quadrimaculata (Rüppell, 1835) was investigated to study the trophic status of the species as well as to assess the level of bioaccumulation of heavy metals in the body of the fish. The study was conducted based on 328 gut samples collected from February to March (dry months) and from August to September (wet months) of the year 2011. Frequency of occurrence and volumetric methods were employed in this study. Detritus, fish eggs, macrophytes, phytoplankton and insects occurred in 54.9%, 16.2%, 43.9%, 56.4% and 26.6% of the guts, respectively and comprised 27.1%, 22.2%, 18.2%, 18.2% and 14.1% of the total volume of food, respectively. The proportions of different food items consumed varied during the dry and wet months. Fish eggs and detritus were the dominant food items during the dry months. Macrophytes and insects were also common in the diet. During the wet months, phytoplankton was the most dominant food item (33.5% by volume). Macrophytes, detritus and insects were also important in the diet. -
Fosaf Proceedings of the 13Th Yellowfish Working
1 FOSAF THE FEDERATION OF SOUTHERN AFRICAN FLYFISHERS PROCEEDINGS OF THE 13TH YELLOWFISH WORKING GROUP CONFERENCE STERKFONTEIN DAM, HARRISMITH 06 – 08 MARCH 2009 Edited by Peter Arderne PRINTING SPONSORED BY: 13th Yellowfish Working Group Conference 2 CONTENTS Page Participants 3 Chairman’s Opening Address – Peter Mills 4 Water volumes of SA dams: A global perspective – Louis De Wet 6 The Strontium Isotope distribution in Water & Fish – Wikus Jordaan 13 Overview of the Mine Drainage Impacts in the West Rand Goldfield – Mariette 16 Liefferink Adopt-a-River Programme: Development of an implementation plan – Ramogale 25 Sekwele Report on the Genetic Study of small scaled yellowfishes – Paulette Bloomer 26 The Biology of Smallmouth & Largemouth yellowfish in Lake Gariep – Bruce Ellender 29 & Olaf Weyl Likely response of Smallmouth yellowfish populations to fisheries development – Olaf 33 Weyl Early Development of Vaal River Smallmouth Yellowfish - Daksha Naran 36 Body shape changes & accompanying habitat shifts: observations in life cycle of 48 Labeobarbus marequensis in the Luvuvhu River – Paul Fouche Alien Fish Eradication in the Cape rivers: Progress with the EIA – Dean Impson 65 Yellowfish Telemetry: Update on the existing study – Gordon O’Brien 67 Bushveld Smallscale yellowfish (Labeobarbus polylepis): Aspects of the Ecology & 68 Population Mananagement– Gordon O’Brien Protected River Ecosystems Study: Bloubankspruit, Skeerpoort & Magalies River & 71 Elands River (Mpumalanga) – Hylton Lewis & Gordon O’Brien Legislative review: Critical -
YWG Conference Proceedings 2014
FOSAF PROCEEDINGS OF THE 18 TH YELLOWFISH WORKING GROUP CONFERENCE BLACK MOUNTAIN HOTEL, THABA ´NCHU, FREE STATE PROVINCE Image courtesy of Carl Nicholson EDITED BY PETER ARDERNE 1 18 th Yellowfish Working Group Conference CONTENTS Page Participants 3 Opening address – Peter Mills 4 State of the rivers of the Kruger National Park – Robin Petersen 6 A fish kill protocol for South Africa – Byron Grant 10 Phylogeographic structure in the KwaZulu-Natal yellowfish – Connor Stobie 11 Restoration of native fishes in the lower Rondegat River after alien fish eradication: 15 an overview of a successful conservation intervention.- Darragh Woodford Yellowfish behavioural work in South Africa: past, present and future research – 19 Gordon O’Brien The occurrence and distribution of yellowfish in state dams in the Free State. – Leon 23 Barkhuizen; J.G van As 2 & O.L.F Weyl 3 Yellowfish and Chiselmouths: Biodiversity Research and its conservation 24 implications - Emmanuel Vreven Should people be eating fish from the Olifants River, Limpopo Province? 25 – Sean Marr A review of the research findings on the Xikundu Fishway & the implications for 36 fishways in the future – Paul Fouche´ Report on the Vanderkloof Dam- Francois Fouche´ 48 Karoo Seekoei River Nature Reserve – P C Ferreira 50 Departmental report: Biomonitoring in the lower Orange River within the borders 54 of the Northern Cape Province – Peter Ramollo Free State Report – Leon Barkhuizen 65 Limpopo Report – Paul Fouche´ 68 Conference summary – Peter Mills 70 Discussion & Comment following -
Chapter Two: Study Areas with General Materials and Methods
Chapter Two: Study Areas with General Materials and Methods 40 2 Study areas with general materials and methods 2.1 Introduction to study areas To reach the aims and objectives for this study, one lentic and one lotic system within the Vaal catchment had to be selected. The lentic component of the study involved a manmade lake or reservoir, suitable for this radio telemetry study. Boskop Dam, with GPS coordinates 26o33’31.17” (S), 27 o07’09.29” (E), was selected as the most representative (various habitats, size, location, fish species, accessibility) site for this radio telemetry study. For the lotic component of the study a representative reach of the Vaal River flowing adjacent to Wag ‘n Bietjie Eco Farm, with GPS coordinates 26°09’06.69” (S), 27°25’41.54” (E), was selected (Figure 3). Figure 3: Map of the two study areas within the Vaal River catchment, South Africa Boskop Dam Boskop manmade lake also known as Boskop Dam is situated 15 km north of Potchefstroom (Figure 4) in the Dr. Kenneth Kaunda District Municipality in the North West Province (Van Aardt and Erdmann, 2004). The dam is part of the Mooi River water scheme and is currently the largest reservoir built on the Mooi River (Koch, 41 1975). Apart from Boskop Dam, two other manmade lakes can be found on the Mooi River including Kerkskraal and Lakeside Dam (also known as Potchefstroom Dam). The Mooi River rises in the north near Koster and then flows south into Kerkskraal Dam which feeds Boskop Dam. Boskop Dam stabilises the flow of the Mooi River and two concrete canals convey water from the Boskop Dam to a large irrigation area. -
Spatio-Temporal Variation in Length-Frequency and Salinity Tolerance of Dominant Fishes Utilizing the Orange River-Estuary Continuum
WIJAS 2: 19–32 (2020) Spatio-temporal variation in length-frequency and salinity tolerance of dominant fishes utilizing the Orange River-Estuary Continuum FP Nashima Department of Fisheries and Aquatic Sciences, University of Namibia, P.O Box 462, Henties Bay, Namibia Abstract The length-frequency distribution of the dominant species of euryhaline marine Chelon richardsonii, estuarine Gilchristella aestuaria and freshwater species Labeobarbus aeneus, Mesobola brevianalis and Pseudocrenilabrus philander were investigated seasonally along the Orange River Estuary Continuum (OREC) during high-flow and low-flow periods, conducted in eight years, within 15 years (2004-2018). We sampled fish using a seine net at 18 sites spanning from the mouth of the estuary up to 35 km upstream. The length-frequency distributions of all species did not differ between the high-flow and low-flow season. Spatial differentiation in size-frequency distribution of all freshwater taxon was recorded along the river- estuarine continuum but not for C. richardsonii and G. aestuaria. Total catch-per-unit-effort (CPUE) was low for both M. brevianalis and P. philander, and their abundance declined downstream into the estuarine region as expected for these two freshwater species. A positive correlation between salinity and fish length of all five species was found, demonstrating that juvenile fishes, in particular, freshwater species are less salt-tolerant than the adults. It is concluded that the lower OREC provides a vital fish nursery habitat suitable for growth and development, particularly for marine C. richardsonii and estuarine G. aestuaria. Keywords: Catch-per-unit-effort, distribution, euryhaline, salinity, stenohaline.1 1. Introduction Length-frequency distribution measurements are fundamental to many aspects of fisheries science as they aid in understanding the state of the fish population (Pope et al., 2010). -
THESIS Submitted in Fulfilment of the Requirements for the Degree of MASTER of SCIENCE of Rhodes University
THE KARYOLOGY AND TAXONOMY OF THE SOUTHERN AFRICAN YELLOWFISH (PISCES: CYPRINIDAE) THESIS Submitted in Fulfilment of the Requirements for the Degree of MASTER OF SCIENCE of Rhodes University by LAWRENCE KEITH OELLERMANN December, 1988 ABSTRACT The southern African yellowfish (Barbus aeneus, ~ capensls, .!L. kimberleyensis, .!L. natalensis and ~ polylepis) are very similar, which limits the utility of traditional taxonomic methods. For this reason yellowfish similarities were explored using multivariate analysis and karyology. Meristic, morphometric and Truss (body shape) data were examined using multiple discriminant, principal component and cluster analyses. The morphological study disclosed that although the species were very similar two distinct groups occurred; .!L. aeneus-~ kimberleyensis and ~ capensis-~ polylepis-~ natalensis. Karyology showed that the yellowfish were hexaploid, ~ aeneus and IL... kimberleyensis having 148 chromosomes while the other three species had 150 chromosomes. Because the karyotypes of the species were variable the fundamental number for each species was taken as the median value for ten spreads. Median fundamental numbers were ~ aeneus ; 196, .!L. natalensis ; 200, ~ kimberleyensis ; 204, ~ polylepis ; 206 and ~ capensis ; 208. The lower chromosome number and higher fundamental number was considered the more apomorphic state for these species. Silver-staining of nucleoli showed that the yellowfish are probably undergoing the process of diploidization. Southern African Barbus and closely related species used for outgroup comparisons showed three levels of ploidy. The diploid species karyotyped were ~ anoplus (2N;48), IL... argenteus (2N;52), ~ trimaculatus (2N;42- 48), Labeo capensis (2N;48) and k umbratus (2N;48); the tetraploid species were B . serra (2N;102), ~ trevelyani (2N;±96), Pseudobarbus ~ (2N;96) and ~ burgi (2N;96); and the hexaploid species were ~ marequensis (2N;130-150) and Varicorhinus nelspruitensis (2N;130-148). -
Hexaploidy in Yellowfish Species (Barbus, Pisces, Cyprinidae) from Southern Africa
Journal of Fish Biology (1990) 37, 105-1 15 Hexaploidy in yellowfish species (Barbus, Pisces, Cyprinidae) from southern Africa L. K. OELLERMANNAND P. H. SICELTON* J.L.B. Smith Institute of Ichthyology, Private Bag 1015, Grahamstown 6140, Republic of South Africa (Received 18 July 1989, Accepted I February 1990) Five small-scaled yellowfish (large Burbus spp.) from southern Africa are shown to have modal 148 or 150chromosomes. Themajority ofcyprinid species have 2N = 50chromosomes, indicating that the yellowfish karyotype is hexaploid in origin. However, as there is no indication that the species are unisexual or that normal reproduction occurs by any means other than bisexual fertilization, the yellowfish karyotype is considered to have reverted to a diploid condition. Key words: karyology; yellowfish; Burbus; hexaploidy; southern Africa. I. INTRODUCTION The name ' yellowfish ' is given to several large-sized Burbus species in southern Africa (Jubb, 1967). The yellowfish fall into two groups on the basis of scale size. The group with smaller scales consists of five recognized species distributed in the Orange River system and adjacent drainage systems (Skelton, 1986). The second group, with larger scales, consists of two species, Barbus rnarequensis Smith, 1841 and Barbus codringtonii Boulenger, 1908, distributed in east coastal drainages from the Phongola River to the Zambezi River system. This study concerns the five small-scaled yellowfish species, viz. Barbus cupensis Smith, 1841 from the Olifants River system, Burbus aeneus (Burchell, 1822) and Burbus kimberleyensis Gilchrist & Thompson, 1913 from the Orange River system, Barbus polylepis Boulenger, 1907 from the Limpopo, lncomati and Phongola River systems, and Burbus natalensis Castelnau, 1861 from the rivers of Natal. -
The Large Barbs (Barbus Spp., Cyprinidae, Teleostei) of Lake Tana (Ethiopia), with a Description of a New Species, Barbus Osseensis
THE LARGE BARBS (BARBUS SPP., CYPRINIDAE, TELEOSTEI) OF LAKE TANA (ETHIOPIA), WITH A DESCRIPTION OF A NEW SPECIES, BARBUS OSSEENSIS by * LEO A.J. NAGELKERKE and FERDINAND A. SIBBING (Experimental Zoology Group, WageningenInstitute of Animal Sciences (WIAS), Wageningen University,Marijkeweg 40, 6709 PG Wageningen, The Netherlands) ABSTRACT Recently the complex of 'large', hexaploid barbs (genus Barbus) of Lake Tana, Ethiopia, was revised as 14 species (NAGELKERKE& SIBBING, 1997), seven of which were new. This paper describes another new species, Barbus osseensis and summarises the major features of the former new species (B. crassibarbis, B. megastoma, B. longissimus, B. tsanensis, B. brevicephalus, B. truttiformis, and B. platydorsus). Figures of all fifteen large barb species of Lake Tana are presented, and an identification key for specimens larger than 15 cm standard length is provided. The position of the large hexaploid barbs within the genus Barbus is discussed. KEY WORDS:barbins, Barbus, cyprinids, Ethiopia, hexaploid, identification key, Labeo- barbus, Lake Tana, species flock. INTRODUCTION The genus Barbus The cyprinid genus Barbus Cuvier & Cloquet, 1816, at present includes c. 800 species in Eurasia and Africa. It is generally accepted that the genus is a paraphyletic assemblage within the subfamily Cyprininae (HOWES, 1987), but a proper revision of the phylogenetic relationships among the different species of the genus Barbus has not been made until now (cf BERREBI et al., 1996). The type species of the genus, Barbus barbus (L.) 1758, the widely distributed European barb, belongs to what is called Barbus 'sensu stricto'. This is a monophyletic group of European and some north- African species (LEVEQUE & DAGET, 1984). -
The Use of Water Resources for Inland Fisheries in South Africa
Review The use of water resources for inland fisheries in South Africa JR McCafferty1, BR Ellender1, OLF Weyl2* and PJ Britz1 1Department of Ichthyology and Fisheries Science, Rhodes University, Grahamstown 6139, South Africa 2South African Institute for Aquatic Biodiversity (SAIAB), Private Bag 1015, Grahamstown 6139, South Africa Abstract The contribution of inland fisheries to food security, livelihood provision, poverty alleviation, and economic development in developing African countries is well documented, but there is surprisingly little literature on the history, current status and potential of South Africa’s inland fishery resources. This presents a constraint to the management and sustainable develop- ment of inland fisheries. A literature review of peer-reviewed and grey literature was thus undertaken which is presented as a synthesis of knowledge on inland fisheries in South Africa. We track the chronology of literary themes on inland fisheries from the colonial era to the present, provide an overview of the recreational, subsistence and commercial sub-sectors, the production potential of inland waters, interventions to promote fishery development, and attempts to value inland fisheries. The review summarises the current state of knowledge on fisheries resources, outlines potential sources of data, highlights relevant and important information, and identifies knowledge gaps. The literature survey reveals an urgent need for research covering the biological, social, economic and governance aspects, if inland fisheries are to be developed in a rational and sustainable manner which promotes South Africa’s national policy goals. Keywords: yield, alien, angling, CPUE, impact, value of inland fisheries, information, sectors, potential Introduction Allanson and Jackson, 1983; Cochrane, 1987; Andrew, 2001).