1978 Fisheries statistics - Kariba

Fishery statistics for 1978 are presented for: (1) total production; (2) effort and landings; (3) gill-net fisheries production landings and purchases; (4) monthly percentage composition of catch for Kariba area; (5) African camp effort statistics: (6) sardine fisheries.

Summary of fishery statistics, 1978

This fisheries report summarises developments of the year 1978 in the region of the North West Water Authority. This report provides catch statistics, rod and line and commercial for salmon and sea trout, fish culture and hatchery operations, restocking with trout and freshwater fish, upstream fish movement recorded at Authority fish counters, counts of salmon and sea trout spawning redds, fish mortalities, licences issued, and prosecutions.

Distribution et abondance des larves de thonidés dans l'Atlantique tropico-oriental. Étude des données de 1963 à 1974

From several sources of data, the authors study seasonal variations of larval abundance for five species of tuna in Eastern Tropical Atlantic and its relation to the hydrological conditions. Distributional maps and TS graphs are given.

Electrofishing survey of the River Calder and its tributaries - April 1978.

An electrofishing survey was undertaken in the period April 24th - 28th as part of the detailed biological study of the Calder Catchment being carried out by this department in early 1978. The sites to be fished were selected to indicate broadly the fishing status of the major sections of the main river and its larger tributaries and by no means intended to describe the fishing status of the whole catchment in detail. The results on the distributions of fish species are discussed, in general, in relation to the major polluting influences on the catchment. The results of the second survey are given and discussed separately in Appendix I.

Statistiques de la pêche collective en Lagune Ebrié (1978-1979)

A first treatment of the statistical data of 1978 and 1979 on the collective fishing showed a decrease of total catches in the Ebrié Lagoon. The same diminution was found in the amount of smoked-fish collected in two different places of the lagoon. This fall is due to a smaller effort in the lagoon of the purse-seines in the Abidjan area and a decrease of the catches per unit of effort.

The relationship between catch and effort and its effect on predicted yields of sardine fisheries in Lake Kariba

There is an unusual relationship between catch per unit effort and effort in the Lake Kariba sardine (Limnothrissa miodon) fishery. This is apparently a results of ecological changes in the lake following the decline of the Salvinia mats that existed there until 1973. Predictive models based on the entire data set (1974-89) are of limited value because they are influenced by the rapid decline in catch per unit effort that took place from 1974 to 1978. A model based on the 1980-89 data indicates that the current catch could be increased substantially. Some empirical models and features of the sardine's biology suggest that it is a realistic model.

Courtship and spawning behaviors of carangid species in Belize

Many species of reef f ish agg regate seasonally in large numbers to spawn at predictable times and sites (Johannes, 1978; Sadovy, 1996; Domeier and Colin, 1997). Although spawning behavior has been observed for many reef fish in the wild (Wicklund, 1969; Smith, 1972; Johannes, 1978; Sadovy et al., 1994; Aguilar Perera and Aguilar Davila, 1996), few records exist of observations on the courtship or natural spawning for the commercially important family Carangidae (jacks) (von Westernhagen, 1974; Johannes, 1981; Sala et al., 2003). In this study, we present the first observations on the natural spawning behavior of the economically-valuable permit (Trachinotus falcatus)(Linnaeus, 1758) from the full to new moon period at reef promontories in Belize, with notes on the spawning of the yellow jack (Carangoides bartholomaei) (Cuvier, 1833), and the courtship of five other carangid species.

Ninth Annual Report for year ended 31st March, 1974

This is the ninth Annual report of the Cumberland River Authority on information of its activities and responsibilities on river management in its area between the beginning of April 1973, to the end of March 1974. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes periodical surveys, hydrometric schemes, acceptable flows, conservation works and a review of rainfall and river flow. The section on land drainage looks at work on improvement schemes, floods, charges and information on maintenance work carried out on rivers including Wampool, Waver, Glenderamackin and Lyvennet. The fisheries section covers 5 districts of the River Eden, Esk, Ellen, Derwent and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as fisheries protection and licence duties. The fourth section on pollution deals with water quality, and the results of samples taken for chemical analysis from rivers Eden, Eamont, Leith, Lowther, Lyne, Petteril, Caldew, Calder, Marron, Irthing, Esk, Irt, Mite, Derwent, Ehen, Ellen, Annas, Wampool and Waver are also given. It also covers information on sewage and trade effluents. The River Authorities preceded the Environment Agency which came into existence in 1996.

Regional Fisheries Advisory Committee 29th April, 1974

This is the first report from the Regional Fisheries Advisory Committee meeting, which was held on the 29th April, 1974. The report looks at sections on estimates for the anticipated income and expenditure on fisheries for the current year, the structure of fisheries in the region, and a list of the fisheries in the ownership of the North West Water Authority. Also covered is information relating to fishery and sea fishery byelaws, license duties and a summary of the current activity and the future plans for the committee. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

South & West Cumberland Fisheries Advisory Committee 3rd June, 1974

This is the first report from the South and West Cumberland Fisheries Advisory Committee meeting, which was held on the 3rd June 1974. The report includes sections on fishery byelaws, estimates for the anticipated income and expenditure on fisheries for the current year, and fish mortality. The section on fish mortality includes the details of a fish kill on the River Marron, gives points along the river where water was sampled, and the results of the analysis. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Eden Fisheries Advisory Committee 4th June, 1974

This is the first report from the Eden Fisheries Advisory Committee meeting, which was held on the 4th June 1974. The report includes sections on fishery byelaws, estimates for the anticipated income and expenditure on fisheries for the current year, licence duties, the Nursery Stream Project and Holmewrangle hatchery. The section on the Nursery Stream Project includes the reasons for undertaking the project, and the details of the project. The section on the Holmewrangle hatchery looks at low survival rates and reasons for mortality for 1973/1974. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Lune, Wyre & Furness Fisheries Advisory Committee 6th June, 1974

This is the first report from the Lune, Wyre and Furness Fisheries Advisory Committee meeting, which was held on the 6th June 1974. The report includes sections on fishery byelaws, estimates for the anticipated income and expenditure on fisheries for the current year, the arrangements for the release of freshets to the River Leven in times of drought, and the utilisation of water resources. This section looks at proposed abstractions for the River Lune and Wyre, and the Ullswater and Windermere Pumping Stations. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

South Lancashire Advisory Committee 10th June, 1974

This is the first report from the South Lancashire Fisheries Advisory Committee meeting, which was held on the 10th June 1974. The report includes sections on fishery byelaws, estimates for the anticipated income and expenditure on fisheries for the current year, and information includeing the aims of a report entitled 'Taking Stock', which looked at migratory fish in England and Wales. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Mersey & Weaver Advisory Committee 12th June, 1974

This is the first report from the Mersey and Weaver Fisheries Advisory Committee meeting, which was held on the 12th June 1974. The report includes sections on fishery byelaws, estimates for the anticipated income and expenditure on fisheries for the current year, information including the aims of a report entitled 'Taking Stock', licence duties, the need of a Coarse Fish Unit and pollution. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.