Data are collected according to the fisheries data collection programme. For the estimation of the fishing mortality analytical assessment of fish stocks for major industrial fish indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about mortality caused by fishing, fishing act parameters and biological samples are obtained in several ways: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. Data on catches of salmon, trout, cod and eel in recreational fisheries also are collected. For the calculation of the fish mortality information about caught fish distribution in the age groups have to be collected using data from biological analysis (weight, age etc.). For collecting of samples in ports and on vessels 2 methods are used: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. 3 kinds of international surveys are used: 1. Baltic Sea international trawling surveys. Aim collect data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year - in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of the fishing mortality analytical assessment of fish stocks for major industrial fish indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about mortality caused by fishing, fishing act parameters and biological samples are obtained in several ways: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. Data on catches of salmon, trout, cod and eel in recreational fisheries also are collected. For the calculation of the fish mortality information about caught fish distribution in the age groups have to be collected using data from biological analysis (weight, age etc.). For collecting of samples in ports and on vessels 2 methods are used: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. 3 kinds of international surveys are used: 1. Baltic Sea international trawling surveys. Aim collect data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year - in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of the fishing mortality analytical assessment of fish stocks for major industrial fish indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about mortality caused by fishing, fishing act parameters and biological samples are obtained in several ways: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. Data on catches of salmon, trout, cod and eel in recreational fisheries also are collected. For the calculation of the fish mortality information about caught fish distribution in the age groups have to be collected using data from biological analysis (weight, age etc.). For collecting of samples in ports and on vessels 2 methods are used: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. 3 kinds of international surveys are used: 1. Baltic Sea international trawling surveys. Aim collect data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year - in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of the fishing mortality analytical assessment of fish stocks for major industrial fish indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about mortality caused by fishing, fishing act parameters and biological samples are obtained in several ways: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. Data on catches of salmon, trout, cod and eel in recreational fisheries also are collected. For the calculation of the fish mortality information about caught fish distribution in the age groups have to be collected using data from biological analysis (weight, age etc.). For collecting of samples in ports and on vessels 2 methods are used: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. 3 kinds of international surveys are used: 1. Baltic Sea international trawling surveys. Aim collect data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year - in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of spawning stock biomass analytical assessment of fish stocks for major industrial fish indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about spawning stock biomass, fishing act parameters and biological samples are obtained in several ways: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. For the calculation of the spawning stock biomass information about caught fish distribution in the age groups have to be collected using data from biological analysis (weight, age etc.). For collecting of samples in ports and on vessels 2 methods are used: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. 3 kinds of international surveys are used: 1. Baltic Sea international trawling surveys. Aim collect data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year - in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of spawning stock biomass analytical assessment of fish stocks for major industrial fish indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about spawning stock biomass, fishing act parameters and biological samples are obtained in several ways: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. For the calculation of the spawning stock biomass information about caught fish distribution in the age groups have to be collected using data from biological analysis (weight, age etc.). For collecting of samples in ports and on vessels 2 methods are used: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. 3 kinds of international surveys are used: 1. Baltic Sea international trawling surveys. Aim collect data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year - in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of spawning stock biomass analytical assessment of fish stocks for major industrial fish indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about spawning stock biomass, fishing act parameters and biological samples are obtained in several ways: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. For the calculation of the spawning stock biomass information about caught fish distribution in the age groups have to be collected using data from biological analysis (weight, age etc.). For collecting of samples in ports and on vessels 2 methods are used: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. 3 kinds of international surveys are used: 1. Baltic Sea international trawling surveys. Aim collect data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year - in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of spawning stock biomass analytical assessment of fish stocks for major industrial fish indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about spawning stock biomass, fishing act parameters and biological samples are obtained in several ways: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. For the calculation of the spawning stock biomass information about caught fish distribution in the age groups have to be collected using data from biological analysis (weight, age etc.). For collecting of samples in ports and on vessels 2 methods are used: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. 3 kinds of international surveys are used: 1. Baltic Sea international trawling surveys. Aim collect data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year - in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of the age and size distribution of individuals in the populations of commercially-exploited species analytical assessment of fish stocks for major indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about age and size distribution, fishing act parameters and biological samples are obtained: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. Data on catches of salmon, trout, cod and eel in recreational fisheries also are collected. For the calculation of the age and size distribution information about caught fish distribution in the age groups have to be collected (weight, age etc.). Methods used for collecting of samples in ports and on vessels: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. International surveys: 1. Baltic Sea international trawling surveys collecting data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of the age and size distribution of individuals in the populations of commercially-exploited species analytical assessment of fish stocks for major indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about age and size distribution, fishing act parameters and biological samples are obtained: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. Data on catches of salmon, trout, cod and eel in recreational fisheries also are collected. For the calculation of the age and size distribution information about caught fish distribution in the age groups have to be collected (weight, age etc.). Methods used for collecting of samples in ports and on vessels: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. International surveys: 1. Baltic Sea international trawling surveys collecting data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of the age and size distribution of individuals in the populations of commercially-exploited species analytical assessment of fish stocks for major indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about age and size distribution, fishing act parameters and biological samples are obtained: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. Data on catches of salmon, trout, cod and eel in recreational fisheries also are collected. For the calculation of the age and size distribution information about caught fish distribution in the age groups have to be collected (weight, age etc.). Methods used for collecting of samples in ports and on vessels: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. International surveys: 1. Baltic Sea international trawling surveys collecting data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.

Data are collected according to the fisheries data collection programme. For the estimation of the age and size distribution of individuals in the populations of commercially-exploited species analytical assessment of fish stocks for major indicator species (herring, sprat, cod and flatfish) is used using data both from the commercial and research fishing surveys. Data about age and size distribution, fishing act parameters and biological samples are obtained: - from the fishermen, - when experts of Institute of Food Safety, Animal Health and Environment BIOR participate as observers in industrial fishing trips, - during the international surveys. Data on catches of salmon, trout, cod and eel in recreational fisheries also are collected. For the calculation of the age and size distribution information about caught fish distribution in the age groups have to be collected (weight, age etc.). Methods used for collecting of samples in ports and on vessels: - for coastal fishing according to agreements with BIOR fishermen collect and submit samples of specific species to BIOR; - for fishing in open sea vessel, on which sampling have to be performed, is chosen randomly. Additional biological samples are collected by BIOR specialists participating in industrial fishing trips. For fish species subject to an international stock assessment on the basis of the biological parameters obtained, fish catches are recalculated in quarters and in total per year. International surveys: 1. Baltic Sea international trawling surveys collecting data about the state of cod and flounder stock (bottom trawling) and herring and sprat (pelagic trawling) as well as the size of it addition. Surveys for demersal fish are carried out twice a year in March, December, for pelagic fish once per year in determined period in standard route crossing the ICES statistical rectangles. During trips fish hydroacoustic records are carried out, oceanographic and ihtioplankton samples are collected. Trawling is done in the light hours of the day. Trawling is done at random on a specified network of stations from the trawl track database. 2. Baltic Sea international hydroacoustic survey in standard route twice per year in May and October, in ICES 28th sub-region and in the N of 26th sub-region, using research pelagic trawl for control trawling. Catches are weighed and sorted by species. 3. Gulf of Riga acoustic herring survey 1 per year together with EMI.