Die Entwicklung des Aufwandes in der deutschen Garnelenfischerei und der Versuch einer Standardisierung der jährlichen Einheitsanlandungen (LPUE) zwischen 1976 und 2010

Brown shrimp is a fastgrowing, shortlived species, and all attempts to use stock assessment methodologies typically applied to other fisheries are usually unsuccessful. Here landings per unit effort data (LPUE) for the German fleet based on a number of effort metrics are used as indices of stock size. Their utility in relation to describing stock development and fisheries management is discussed. LPUE estimates indicate that stock sizes between 1976 and 1989 were relatively stable. In 1990, the lowest reported landings of brown shrimps in Germany coincided with severe economic problems for the shrimp fisheries. From 1990 to 2010 standardised annual indices show that both landings and LPUE estimates have increased at variable rates suggesting large stocks of brown shrimps in recent years. This is discussed in relation to the positive effects of reduced predator abundance and favourable climatic factors.

Report on the 1994 juvenile salmon stocking study of Foxhouses and Grizedale Becks, River Wyre

The aim of this study was to assess the suitability of Foxhouses and Grizedale Becks as nursery habitat for juvenile salmon. A comprehensive fish stock assessment survey of the Wyre catchment was carried out by the NRA in 1992. This survey found that juvenile salmon were absent from two sites studied in Foxhouses Beck. In one site in Grizedale Beck, 0+ salmon were found at very low densities. Juvenile trout were found in all three sites studied in 1992. On the basis of the results of the 1992 survey, these two becks were stocked in 1994 with 0+ salmon reared from Lune broodstock at the NRA's Witcherwell Hatchery. These salmon were stocked at a known density, following a pre-stocking survey. This report examines and compares the results of the pre-stocking survey consisting of fourteen sites in the two becks, carried out between 12/04/94 and 27/04/94 and a post- stocking survey of six sites, carried out between 12/10/94 and 19/10/94. Flow, habitat and in-river obstructions have been shown to affect juvenile salmonid densities. A habitat description is provided for each site surveyed during the course of this study.

1994 annual report on fisheries in the North west incorporating the annual summary of fishery statistics.

This report provides national and regional developments, statistics on fisheries finance, including income and expenditure, salmon and sea trout catches, including rod and line, commercial catches, and angler log book returns, monitoring and special projects, including salmon microtagging, salmon egg survival in Swanside Beck, and fish stock assessments, one with hydroacoustics, and one of surveys of different areas in Cumbria. The appendix includes a summary of fish statistics for 1994.

A bibliography of Lake Kariba 1987-1994

The bibliography contains some 116 citations, including unpublished reports and manuscripts, regarding Lake Kariba. Most of the reports are from the Zambia/Zimbabwe SADC Fisheries and Lake Kariba Fisheries Research Institute. The citations are listed in alphabetical order according to author.

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.

1994 fisheries statistics, Lake Kariba - Zimbabwe shore

The report provides catch records for the Kapenta and inshore fisheries in the Zimbabwean waters of Lake Kariba for the year 1994. Kapenta usually constitute about 90% of the total catch from Lake Kariba; for statistical purposes catches are recorded for the 5 hydrological basins - Mlibizi, Binga, Sengwa, Bumi and Kariba. Whereas kapenta represent a unit stock which is harvested by both Zimbabwe and Zambia, the artisanal fishery exploits inshore species which generally occupy water less than 10m deep along the shoreline, considered to be 2 separate stocks. The main species in the inshore fishery are Oreochromis mortimeri, Sargochromis codringtonii, Tilapia rendalli, Labeo altivelis, Hydrocynus vittatus, Mormyrus longirostris, Clarias gariepinus and Synodontis zambezensis.

Central area fisheries annual report 1994

The purpose of this report is to record key events/data and to outline the activities of the NRA Central Area Fisheries Function during 1994. The Rivers looked at include the Ribble, Lune, Hodder and Wyre. The issues that the report looks at includes Hydrological and meterological data, catch data for salmon and sea trout, fish kills, and fish stocking. It also lists the Micro-tag returns for 1994 and the six key objectives that the Central Area Fisheries Function has set itself for 1995. The report uses a range of different graphs and tables to display their data.

NRA North west salmonid microtagging programme 1987-1994

The microtagging programme began in 1987 using hatchery reared salmon originating from the rivers Caldew and Hodder and subsequently included the Lune (1988) and Ribble (1989). Microtagging of sea trout began in 1991 for the Lune and in 1993 for the Hodder. The report explores the NRA North west salmonid microtagging programme looking at methods, results and recommendations. The report provides salmon microtagging data and returns from 1987 to 1994.

Distributions and abundances of Pacific sardine (Sardinops sagax) and other pelagic fishes in the California Current Ecosystem during spring 2006, 2008, and 2010, estimated from acoustic–trawl surveys

The abundances and distributions of coastal pelagic fish species in the California Current Ecosystem from San Diego to southern Vancouver Island, were estimated from combined acoustic and trawl surveys conducted in the spring of 2006, 2008, and 2010. Pacific sardine (Sardinops sagax), jack mackerel (Trachurus symmetricus), and Pacific mackerel (Scomber japonicus) were the dominant coastal pelagic fish species, in that order. Northern anchovy (Engraulis mordax) and Pacific herring (Clupea pallasii) were sampled only sporadically and therefore estimates for these species were unreliable. The estimates of sardine biomass compared well with those of the annual assessments and confirmed a declining trajectory of the “northern stock” since 2006. During the sampling period, the biomass of jack mackerel was stable or increasing, and that of Pacific mackerel was low and variable. The uncertainties in these estimates are mostly the result of spatial patchiness which increased from sardine to mackerels to anchovy and herring. Future surveys of coastal pelagic fish species in the California Current Ecosystem should benefit from adaptive sampling based on modeled habitat; increased echosounder and trawl sampling, particularly for the most patchy and nearshore species; and directed-trawl sampling for improved species identification and estimations of their acoustic target stren

Influence of ocean conditions on the timing of early life history events for blue rockfish (Sebastes mystinus) off California

Settled juvenile blue rockfish (Sebastes mystinus) were collected from two kelp beds approximately 335 km apart off Mendocino in northern California and Monterey in central California. A total of 112 rockfish were collected from both sites over 5 years (1993, 1994, 2001, 2002, and 2003). Total age, settlement date, age at settlement, and birth date were determined from otolith microstructure. Fish off Mendocino settled mostly in June and fish off Monterey settled mostly in May (average difference in settlement=23 days). Although the difference in the timing of settlement followed this same pattern for both areas over the five years, settlement occurred later in 2002 and 2003 than in the prior years of sampling. The difference in the timing of settlement was due primarily to differences in birth dates for the two areas. The time of settlement was positively related to upwelling and negatively related to sea level anomaly for most of the months before settlement. Knowledge of the timing of settlement has implications for design and placement of marine protected areas because protection of nursery grounds is frequently a major objective of these protected areas. The timing of settlement is also an important consideration in the planning of surveys of early recruits because mistimed surveys (caused by latitudinal differences in the timing of settlement) could produce biased estimates.

Cheshire Meres 1994 November surveys

This is the Cheshire Meres 1994 November surveys report produced by the National Rivers Authority in 1995. The report focuses on some of Cheshire meres, which were showing evidence of increasing eutrophication, commonly due to anthropogenic inputs. Concern for the deterioration of the water quality of still waters has been translated by incorporating these priorities into the NRA North West Regional Environmental Strategy for Stillwaters. The meres were also being investigated as possible polluted waters under the EC Nitrate Directive. The ultimate aim is to formulate lakes management options in order to help preserve North West still waters and minimise future restoration programmes. For such pro-active work to be carried out, sufficient background data must be available. It should then be possible to fully assess the current status of these lakes, identify seasonal trends and detect significant point/diffuse pollution inputs. These surveys were the first of a series, and it was intended to repeat similar surveys in Summer and Autumn 1995, and include a further 20 meres.

Restormel Fish Counter Annual Report 2010

This is the Restormel Fish Counter, Annual Report 2010 produced by the Environment Agency South West Region on June 2011. The report presents the upstream counts of migratory salmonids recorded on the River Fowey at Restormel Weir fish counting station (SX 107 613) over the period March 2010 to February 2011 inclusive. Data contained within this report covers the period of the commercial migratory salmonid net buy-back scheme and the National Spring Salmon Byelaws. The minimum upstream salmon estimate for 2010, over the period July 2010 to February 2010, was 1220. The fish counter at Restormel suffered from only one major period of unscheduled downtime during 2010/2011. This was due to a counter fault over the period 21 to 30 August 2010 and equated to 10 days of downtime.

Salmonid & freshwater Fisheries statistics England & Wales 1994

This is the Salmonid & Freshwater Fisheries Statistics for England & Wales 1994 produced by the National Rivers Authority (NRA) in 1995. This report is focused on the maintenance, improvement and development of fisheries of England and Wales. This report is the sixth compilation of salmon and migratory trout catch statistics for England and Wales produced by the National Rivers Authority. For the years 1983-88, these statistics were published by the Ministry o f Agriculture, Fisheries and Food (MAFF), Directorate of Fisheries Research in their Data Report Series. The 1994 data have been presented in a broadly similar format to those of 1993.This report makes a general review of different catches: Northumbria, Yorkshire, Anglian, Thames, Southern, Wessex, South West, Severn-Trent, Welsh and North West.

A report on the strategic stock assessment survey of the Colton Beck catchment 1994 with particular reference to salmonids

This is the report on the strategic stock assessment survey of the Colton Beck catchment in 1994 with particular reference to salmonids in Colton Beck, River Ea, River Gilpin and Rusland Pool. This report forms one part of the third year of a triennial survey programme for the South West Cumbria and South Cumbria catchments. It was produced by the National Rivers Authority in 1994. Colton Beck had excellent densities of sea trout (Salmo trutta) and a small population of salmon (Salmo salar) in its lowest reaches. The total productivity was very good throughout the catchment. Stocking of sea trout fry in 1993 has enhanced the population with survivors through to parr probably adding to the scoring of double class A at two sites in the survey in 1994. Stocking was not undertaken in 1994, but the population appears to be maintaining itself at a very high level.

A report on the strategic fisheries stock assessment survey of the River Winster 1995 together with a coarse fish survey in 1994 and reference to the 1995 drought

This is the report on the strategic fisheries stock assessment survey of the River Winster 1995 together with a coarse fish survey in 1994 and reference to the 1995 drought, produced by the Environment Agency North West in 1996. Salmonid production within the Winster catchment was dominated by trout although good densities of salmon juveniles were found on some main river sites. Despite suffering drought conditions for much of 1995, only salmon fry production appeared to have been affected. Coarse fish populations once found in the lower reaches of the Winster appear to have declined to very low levels with no fish sampled. This may be partly due to broken tidal gates allowing saline intrusion. It seems that the lower river was suited to the development of a recreational coarse fishery, now that the gates have been repaired. This report completes the strategic stock assessment surveys planned for the period 1992-1995. It represents the last major catchment that was surveyed to determine the current status of fisheries in the South and South West Cumbria areas.