Ecological study of the River Lambourn. Report for the period October 1973 to September 1977

The investigations described in this report were carried out to fulfill three distinct but interrelated objectives. In 1973 the Thames Conservancy were making plans for a second stage of their groundwater scheme which would take water from the chalk aquifers in the valley of the Kennet and they wanted basic information on the ecological state of this river and its upper tributaries. Little appeared to be known about limestone streams and a preliminary study of one of the streams in this area was desirable as a basis for planning more detailed studies if these were needed later. At a progress meeting held in March 1976 the problems and opportunities presented by the developing drought conditions were considered. It was concluded that the ecological effects of the exceptionally low natural flows should be studied and that it would be important to assess the ecological impact of the groundwater scheme if it was brought into operation that year. This could only be done on the Lambourn and the Winterbourne and it was decided that considerable effort should be diverted there for this purpose and that the field observations should be extended to cover any recovery period after the end of the drought. To make this possible it was agreed that the studies of invertebrates and detritus on the Kennet should be reduced considerably and that the proposed study of the limestone stream should be abandoned. The revised objectives were as follows: A detailed ecological study of several sites on the Kennet and its tributaries above Kintbury, extending over at least two years and involving observations on wate r weeds , invertebrates, fish, detritus and the trophic relationships within the river community. Quantitativ e and qualitative sampling of water weeds and invertebrates during one year at a number of sites on several chalk streams to determine whether the patterns and relationships found in the Lambourn are also found at the other sites. Observations on the Lambourn at Bagnor were to continue for most of the period to look for long-term fluctuations and to enable these sites to act as controls with which the other sites could be compared. Further detailed studies on the Lambourn and the Winterbourne to assess the impact of low flows, trial pumping and the operation of the groundwater scheme.

Pollution and water quality control of the River Tejo. Report on a visit to Portugal, Sep 27th - October 10th, 1987

Fundamental changes in the management of water resources in Portugal are now evolving. Five regional organisations termed Administracaos de Regiao Hidrographic (ARH), will be created to manage water resources within their respective geographical areas. These areas will be catchment based. As a fore-runner to the implementation of the five ARH's a foundation project has been established within the Direcao-Geral do Recursos Naturais to examine the practical implications of the new system. This project has been divided into a number of sub-projects and complementary projects to include the Tejo complementary project. The Tejo complementary project is the focus of this report. The report is to advise on the role of biology in the proposed ARH, to establish priorities for biological studies within the present Projecto de Gestao Integrada dos Recursos Hidricos da Bacia Hidrografica do Rio Tejo (PGIRH/T) and to assist with the planning of laboratory facilities for biology at the new PGIRH/T laboratory at Alges, Lisboa.

Annual report 1986

A report is given of activities conducted by the Lake Kariba Fisheries Research Institute during the year 1986, describing the various conferences and research projects carried out. A list of publications by the Institute is also included.

Annual report 1987

The 1987 Annual Report of the Lake Kariba Fisheries Research Institute details the various research projects conducted during the year, which covered the following topics: ecology of the submerged vascular vegetation; biology and population dynamics of the butter catfish; post-harvest fish technology and management; sardine population structure; and analysis of the inshore fish.

Annual report 1988

The document gives an account of the activities carried out during the year 1988 by the Lake Kariba Fisheries Research Institute and includes individual reports of the various projects conducted during the year. They include: the Zambia/Zimbabwe Lake Kariba Fisheries Research and Development Project; a comparative study of genetic growth determinance of Limnothrissa miodon; a comparative study of consumption rates and preference for some species of aquatic macrophytes by Tilapia rendalli; an evaluation of inshore stocks, and external variables causing variation in composition abundance and distribution; Willards cage-culture pilot project; and, aspects of the ecology of the phytobenthic communities in Lake Kariba - PhD thesis.

Annual report 1989

The report describes the activities of the Institute during the year 1989, which include the following: The Zambia/Zimbabwe Lake Kariba Fisheries Research and Development Project; the pilot cage culture project; cooperative development; an economic evaluation of the Kariba International Tiger Fish Tournament; hydroacoustic surveys in Lake Kariba; and, the age structure and population dynamics of the sardine Limnothrissa miodon in Lake Kariba.

Annual report 1990

The report is presented under the following headings: Officer-in-charge's report; The Zambia/Zimbabwe SADCC Lake Kariba Fisheries Research and Development Project; Comparative study of growth of Limnothrissa miodon (Boulenger) in Lake Kariba; An analysis of the effects of fishing location and gear on kapenta catches on Lake Kariba; Hydro-acoustic surveys in Lake Kariba; The pre-recruitment ecology of the freshwater sardine Limnothrissa miodon (Boulenger) in Lake Kariba; Report on short course in zooplankton quantitative sampling methods held at the Freshwater Biology Laboratory, Windermere from 19 to 30 November 1990; Report on training: post-graduate training - Humberside Polytechnic, UK; Postharvest fish technology in Lake Kariba, Zimbabwe; and assessment of the abundance of inshore fish stocks and evaluating the effects of fishing pressure on the biology of commercially important species and ecological studies on Synodontis zambezensis .

Annual report 1991

This annual report is presented under the following major headings: 1) acting officer-in-charge's report; 2) project coordinator's report; 3) evaluation of some components of the Lake Kariba "kapenta fishing unit"; 4) comparative study of growth of Limnothrissa miodon (Boulenger) in Lake Kariba; 5) the pre-recruitment ecology of the freshwater sardine Limnothrissa miodon (Boulenger) in Lake Kariba; 6) the ecology of the inshore fishery of Lake Kariba; the biology of Synodontis zambezensis ; 7) database; and, 8) publications.

Annual report 1992

An account is given of the activities conducted by the Lake Kariba Fisheries Research Institute during the year 1992, which include the following research programmes: Comparative study of growth of Limnothrissa miodon (Boulanger) in Lake Kariba; Effort calibration for the Kapenta fishery; Pre-recruitment ecology of the freshwater sardine L.miodon (Boulanger) in Lake Kariba; The ecology of the inshore fishery of Lake Kariba - biology of Synodontis zambezensis; Mercury in the tigerfish (Hydrocynus vittatus), green happy (Serranochromis codringtoni) and Tanganyika sardine (L.miodon) from Lake Kariba, Zimbabwe; and, Assessment of the potential development of a Synodontis fishery on Lake Kariba, Zimbabwe.

Annual report 1993

The report provides an account of the activities carried out by the Lake Kariba Fisheries Research Institute during the year 1993 under the following headings: Institute finances; Staffing and staff training; Staff housing; Infrastructure and institute expansion; Vehicles and vessels; and, Fisheries and fishery management. Individual reports regarding the various project activities conducted during the year are also included.

Annual report 1994

The report provides an account of the activities carried out by the Lake Kariba Fisheries Research Institute during the year 1994 under the following headings: Institute finances; Staffing and staff training; Staff housing; Infrastructure and institute expansion; Vehicles and vessels; and, Fisheries and fishery management. Individual reports regarding the various project activities conducted during the year are also included.

Annual report 1995

An account is given of the activities of the Institute during the year 1995, including also reports of various projects carried out by staff members, which concerned the following: pre-recruitment ecology of the freshwater sardine (Limnothrissa miodon) in Lake Kariba (Zimbabwe); hydroacoustic surveys of kapenta abundance in Lake Kariba and Lake Cahora Bassa (Mozambique); angler's tigerfish catches, tigerfish studies and gillnet sampling; inshore fish population studies in Lake Kariba; catch/effort data recording system; fishermen's training towards the establishment of a Fisheries Co-management approach on Lake Kariba; and, enforcement and compliance with fisheries regulations within the inshore fishery on Lake Kariba.

Annual report 1998

The report provides an account of the activities of the Lake Kariba Fisheries Research Institute of Zimbabwe during the period July 1997 to December 1998. It is presented under the following major headings: 1) Introduction; 2) Institute finances; 3) Staffing and staff training; 4) Infrastructure; 5) Vehicles and vessels; 6) Fisheries management -- kapenta management, inshore fisheries management, law enforcement; 7) Kariba Lakeshore Combination Masterplan; 8) Joint protocol; 9) Research work; and, 10) Publications and presentations.

Solomon Islands: Malaita Hub scoping report

The CGIAR Research Program (CRP) Aquatic Agricultural Systems (AAS) will target five countries, including Solomon Islands. The proposed hubs for Solomon Islands were to cover most provinces, referencing the Western, Central and Eastern regions. Scoping of the initial ‘Central’ hub was undertaken in Guadalcanal, Malaita and Central Islands provinces and this report details findings from all three. As scoping progressed however, it was agreed that, based on the AAS context and priority needs of each province and the Program’s capacity for full implementation, the Central Hub would be restricted to Malaita Province only and renamed “Malaita Hub”. Consistent in each AAS country, there are four steps in the program rollout: planning, scoping, diagnosis and design. Rollout of the Program in Solomon Islands began with a five month planning phase between August and December 2011, and scoping of the first hub began in January 2012. This report, the second to be produced during rollout, describes the findings from the scoping process between January and June 2012. This report marks the transition from the scoping phase to the diagnosis phase in which output from scoping was used to develop a hub level theory of change for identifying research opportunities. Subsequent reports detail in-depth analyses of gender, governance, nutrition and partner activities and discuss Program engagement with community members to identify grass-roots demand for research.

Report of the Workshop on Blue Crab Stock Dynamics in Chesapeake Bay, December 13-15, 1982, Chesapeake Biological Laboratory

This workshop was convened to begin building a foundation of understanding for developing and evaluating proposed measures for the rational management of the blue crab fishery in Chesapeake Bay. Our goal was to generate a summary of knowledge of blue crab stock dynamics. Specifically, we intended to address, and hoped to estimate, the basic parameters of an exploited stock - growth, mortality, natality, migration rates, sex ratios and abundance. In one sense these objectives were simply a means for organizing our discussions. A second objective was to compile at the workshop pertinent data held by the major research institutions on Chesapeake Bay so all participants could see the kinds and extent of existing data. As with many stock assessment problems, tailoring an estimating procedure around known existing data can be more productive than deciding on a procedure and then trying to find the required data in someone else's files. Authors of papers contributed to the report: B.S. Hester and P.R. Mundy (p. 50); Qisheng Tang (p. 86); L. Eugene Cronin (p. 111); J.R. McConaugha (p. 128); Cluney Stagg and Phil Jones (p. 153).