Content
About the statistics
Definitions
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Name and topic
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Name: River catch
Topic: Agriculture, forestry, hunting and fishing
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Next release
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Responsible division
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Division for Housing, Property, Spatial and Agricultural Statistics
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Definitions of the main concepts and variables
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Anadromous : Term referring to animals that regularly migrate from the ocean up the rivers to spawn.
Weight : The weight is stated in kilos live weight.
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Standard classifications
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Before 1993 salmon were broken down into two groups: salmon under 3 kilos and salmon 3 kilos or more. Since 1993 salmon are divided into the following groups: under 3 kilos, between 3 and 6.9 kilos and 7 kilos and over.
Administrative information
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Regional level
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Figures for each river and county.
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Frequency and timeliness
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Annual. Figures are published in January the year after the fishing has taken place.
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International reporting
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The Norwegian Environment Agency forwards data to NASCO (North Atlantic Salmon Conservation Organization).
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Microdata
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Statistics Norway stores the data files. Register data and catch data are in Oracle tables. Final data files are stored on Linux.
Background
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Background and purpose
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The statistics cover a time series from 1876 and are vital elements in national and international monitoring and management work related to anadromous salmonoids.
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Users and applications
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Catch statistics are an important source of information for nature management, the media and various organizations and groups. Scientists use the statistics to evaluate changes in stocks and to estimate the socio-economic importance of salmon fishing.
Norway is also obligated to report annual catch statistics to NASCO (North Atlantic Salmon Conservation Organization).
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Equal treatment of users
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No external users have access to the statistics and analyses before they are published and accessible simultaneously for all users on ssb.no at 8 am. Prior to this, a minimum of three months' advance notice is given inthe Statistics Release Calendar. Read more about principles for equal treatement of all users on ssb.no.
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Coherence with other statistics
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Figures on sea catches of salmon and sea trout are presented on the Internet.
The number of persons who have paid the national fishing licence fee allowing them to fish salmon, sea trout or sea char by rod or handline in rivers and lakes in the previous years (Source: The Norwegian Directorate of Nature Management):
2008: 75 000
2009: 75 300
2010: 68 000
2011: 69 900
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Legal authority
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The Statistics Act §§2-2 and 3-2
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EEA reference
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Not relevant
Production
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Population
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The statistics include catches of salmon, sea trout and migratory char taken by fishing rod in rivers. As from 2009 data on river catch and release are available.
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Data sources and sampling
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Catch reports from the individual fisherman.
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Collection of data, editing and estimations
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Catch reports from the individual fisherman are collected by landowners, who send a summary catch report to the County Governor or enter data in the Salmon register - river catch reporting . The County Governor are responsible for reporting complete figures for each river in the Salmon register. Statistics Norway downloads a complete file from the Salmon register from a website.
Data is transferred to an editing system and computerized controls are applied. If necessary, the county governors are contacted to assess the data.
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Seasonal adjustment
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Not relevant
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Confidentiality
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Not relevant
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Comparability over time and space
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The collection of data was reorganized in 1993. Previously, fishery boards collected data and sent reports from each salmon district and river to Statistics Norway. An own salmon tax resulted in that the reported figures could be unreliable. In 1993, the county governors started submitting reports, and after that there is reason to belive that the data quality has become better and better.
The number of rivers with reported catch has increased over time. From the begginning in the 1870s only 54 rivers were included. In the 1960s the number of rivers with reported catch had incresed to 170. In the last few years 350 rivers were included in the statistics.
In 1989, 15 per cent of the rivers were closed by different reasons. In 2011, 25 per cent of the rivers were closed. In additon, the last few years quotas from one to three fishes per person in a 24-hour period is introduced.
Over time there has been regulations that has influenced on the statistics. As from 1980, fishing gear as salmon trap and fish net was forbidden in most rivers except Numedalslågen and the county of Finnmark. The average fishing period for salmon fishing by fishing rods or handline is reduced from 200 days in 1850 to 75 days in 2010.
Accuracy and reliability
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Sources of error and uncertainty
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Missing or delayed catch reports from fishermen and landowners can be a problem for the river catch statistics. Statistics are also lacking from some small river systems where fishing is poorly organized. Consequently, the statistics are not totally complete.
In 2009 data on river catch and release are collected for the first time, and the quality of the data may be uncertain.
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Revision
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Not relevant