A transboundary study of the pelagic fish stocks of southern
The main objectives of the survey were the following: • To map the distribution and estimate the abundance of the most commercially important pelagic species in the Namibia-Angola transboundary area (15°50-19°00’), following the survey design utilized in Angolan waters (6 n.mi spacing between transect lines), with special emphasis on the two horse mackerel Cunene horse mackerel (Trachurus trecae) and Cape horse mackerel (Trachurus capensis), sardine “Pilchard” (Sardinops sagax) and other small pelagic species, including anchovy (Engraulis capensis) and round herring (Etrumeus whiteheadi). • To map the distributions and estimate the abundance of the same species in central Namibia south to Dune Point (20°15’ S), following the established survey design with 10 n.mi spacing between the transect lines. • To study and analyse the biological state of the main species, including length frequencies, length-weight relationships, reproductive stages and length-at-maturity. • To map the meteorological and hydrographical conditions in the survey area by means of continuous recordings of weather data such as Sea-surface temperature (SST), Seasurface salinity (SSS), wind
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Format: | Report biblioteca |
Language: | English |
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Bueguela Current Comission
2012
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Subjects: | Pelagic fisheries, Fishery surveys, Acoustics, Sampling, Trawls, Oceanography, Biomass, Distribution, Composition, |
Online Access: | http://hdl.handle.net/1834/5230 |
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dig-aquadocs-1834-52302021-05-19T06:18:12Z A transboundary study of the pelagic fish stocks of southern Krakstad, Jens-Otto Amaro, Aristóteles P. da S. Shigwedha, Vaino Pelagic fisheries Fishery surveys Acoustics Sampling Trawls Oceanography Biomass Distribution Composition The main objectives of the survey were the following: • To map the distribution and estimate the abundance of the most commercially important pelagic species in the Namibia-Angola transboundary area (15°50-19°00’), following the survey design utilized in Angolan waters (6 n.mi spacing between transect lines), with special emphasis on the two horse mackerel Cunene horse mackerel (Trachurus trecae) and Cape horse mackerel (Trachurus capensis), sardine “Pilchard” (Sardinops sagax) and other small pelagic species, including anchovy (Engraulis capensis) and round herring (Etrumeus whiteheadi). • To map the distributions and estimate the abundance of the same species in central Namibia south to Dune Point (20°15’ S), following the established survey design with 10 n.mi spacing between the transect lines. • To study and analyse the biological state of the main species, including length frequencies, length-weight relationships, reproductive stages and length-at-maturity. • To map the meteorological and hydrographical conditions in the survey area by means of continuous recordings of weather data such as Sea-surface temperature (SST), Seasurface salinity (SSS), wind BCC PROJECT: LMR/NANSEN/1/10 CRUISE REPORTS “DR. FRIDTJOF NANSEN”1) Institute of Marine Research, Bergen, Norway 2) Instituto Nacional de Investigação Pesqueira, Luanda, Angola 3) National Marine Information and Research Centre, Swakopmund, Namibia Published Northernern Namibia Transboundary area Trawl sampling procedures Acoustical sampling Survey grid Meteorological sampling hydrographical sampling Oceanographic conditions Transboundary area 2013-11-21T15:01:10Z 2013-11-21T15:01:10Z 2012 Report Non-Refereed http://hdl.handle.net/1834/5230 en 1 Krakstad,J-O, Amaro, A. P. da S, & Shigwedha, V.(2012).A TRANSBOUNDARY STUDY OF THE PELAGIC FISH STOCKS OF SOUTHERN ANGOLA AND NORTHERN NAMBIA.Bergen http://creativecommons.org/licenses/by-nc/3.0/ 46 Namibia Angola Bueguela Current Comission Bergen |
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Pelagic fisheries Fishery surveys Acoustics Sampling Trawls Oceanography Biomass Distribution Composition Pelagic fisheries Fishery surveys Acoustics Sampling Trawls Oceanography Biomass Distribution Composition |
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Pelagic fisheries Fishery surveys Acoustics Sampling Trawls Oceanography Biomass Distribution Composition Pelagic fisheries Fishery surveys Acoustics Sampling Trawls Oceanography Biomass Distribution Composition Krakstad, Jens-Otto Amaro, Aristóteles P. da S. Shigwedha, Vaino A transboundary study of the pelagic fish stocks of southern |
description |
The main objectives of the survey were the following:
• To map the distribution and estimate the abundance of the most commercially
important pelagic species in the Namibia-Angola transboundary area (15°50-19°00’),
following the survey design utilized in Angolan waters (6 n.mi spacing between
transect lines), with special emphasis on the two horse mackerel Cunene horse
mackerel (Trachurus trecae) and Cape horse mackerel (Trachurus capensis), sardine
“Pilchard” (Sardinops sagax) and other small pelagic species, including anchovy
(Engraulis capensis) and round herring (Etrumeus whiteheadi).
• To map the distributions and estimate the abundance of the same species in central
Namibia south to Dune Point (20°15’ S), following the established survey design with
10 n.mi spacing between the transect lines.
• To study and analyse the biological state of the main species, including length
frequencies, length-weight relationships, reproductive stages and length-at-maturity.
• To map the meteorological and hydrographical conditions in the survey area by means
of continuous recordings of weather data such as Sea-surface temperature (SST), Seasurface
salinity (SSS), wind |
format |
Report |
topic_facet |
Pelagic fisheries Fishery surveys Acoustics Sampling Trawls Oceanography Biomass Distribution Composition |
author |
Krakstad, Jens-Otto Amaro, Aristóteles P. da S. Shigwedha, Vaino |
author_facet |
Krakstad, Jens-Otto Amaro, Aristóteles P. da S. Shigwedha, Vaino |
author_sort |
Krakstad, Jens-Otto |
title |
A transboundary study of the pelagic fish stocks of southern |
title_short |
A transboundary study of the pelagic fish stocks of southern |
title_full |
A transboundary study of the pelagic fish stocks of southern |
title_fullStr |
A transboundary study of the pelagic fish stocks of southern |
title_full_unstemmed |
A transboundary study of the pelagic fish stocks of southern |
title_sort |
transboundary study of the pelagic fish stocks of southern |
publisher |
Bueguela Current Comission |
publishDate |
2012 |
url |
http://hdl.handle.net/1834/5230 |
work_keys_str_mv |
AT krakstadjensotto atransboundarystudyofthepelagicfishstocksofsouthern AT amaroaristotelespdas atransboundarystudyofthepelagicfishstocksofsouthern AT shigwedhavaino atransboundarystudyofthepelagicfishstocksofsouthern AT krakstadjensotto transboundarystudyofthepelagicfishstocksofsouthern AT amaroaristotelespdas transboundarystudyofthepelagicfishstocksofsouthern AT shigwedhavaino transboundarystudyofthepelagicfishstocksofsouthern |
_version_ |
1756075152015097856 |