Description of the IMR Standard Light Trap and the Vertical Distribution of Some Decapod Larvae (Homarus and Nephrops)
The construction of different versions of a cheap, robust, and easy to operate light trap for catching various aquatic organisms is shown. The trap can be used to > 300 m depth and meets a number of criteria. Small-scale vertical distribution of decapod larvae was investigated during trap trials....
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Western Indian Ocean Journal of Marine Science
2009
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ftjafricanj:oai:ojs.ajol.info:article/48249 2023-05-15T16:08:49+02:00 Description of the IMR Standard Light Trap and the Vertical Distribution of Some Decapod Larvae (Homarus and Nephrops) V Øresland 2009-11-26 application/pdf http://ajol.info/index.php/wiojms/article/view/48249 en eng Western Indian Ocean Journal of Marine Science http://ajol.info/index.php/wiojms/article/view/48249 Western Indian Ocean Journal of Marine Science; Vol 6, No 2 (2008) Light trap methods Homarus gammarus Nephrops norvegicus larvae vertical distribution Peer-reviewed Article 2009 ftjafricanj 2010-01-05T09:26:41Z The construction of different versions of a cheap, robust, and easy to operate light trap for catching various aquatic organisms is shown. The trap can be used to > 300 m depth and meets a number of criteria. Small-scale vertical distribution of decapod larvae was investigated during trap trials. The traps (6-10) were set for 24 h at different depths, once a week, between 25 July and 28 September 2006, within the Kåvra lobster reserve at the Swedish west coast. This is an area with low salinity in the surface water during summer due to outflow of water from the Baltic Sea. The larvae of the European lobster Homarus gammarus (stage I) and Norway lobster Nephrops norvegicus (stages I-III) were found within and below the thermo- and haloclines. No larvae were found within the upper 2 m. This finding may have important bearings on the larval transport by currents and increase the possibility for retention of larvae, but was not tested inthis study. The highest catches of both H. gammarus and N. norveigicus were obtained during August. The trap appears to be well suited for investigating small-scale vertical distribution during the dark period, and for collecting animals in good condition. However, the trap did notcatch all larval stages, and the relation between light intensity (both natural and trap light) and catch ability is unknown. Article in Journal/Newspaper European lobster Homarus gammarus AJOL - African Journals Online Norway |
institution |
Open Polar |
collection |
AJOL - African Journals Online |
op_collection_id |
ftjafricanj |
language |
English |
topic |
Light trap methods Homarus gammarus Nephrops norvegicus larvae vertical distribution |
spellingShingle |
Light trap methods Homarus gammarus Nephrops norvegicus larvae vertical distribution V Øresland Description of the IMR Standard Light Trap and the Vertical Distribution of Some Decapod Larvae (Homarus and Nephrops) |
topic_facet |
Light trap methods Homarus gammarus Nephrops norvegicus larvae vertical distribution |
description |
The construction of different versions of a cheap, robust, and easy to operate light trap for catching various aquatic organisms is shown. The trap can be used to > 300 m depth and meets a number of criteria. Small-scale vertical distribution of decapod larvae was investigated during trap trials. The traps (6-10) were set for 24 h at different depths, once a week, between 25 July and 28 September 2006, within the Kåvra lobster reserve at the Swedish west coast. This is an area with low salinity in the surface water during summer due to outflow of water from the Baltic Sea. The larvae of the European lobster Homarus gammarus (stage I) and Norway lobster Nephrops norvegicus (stages I-III) were found within and below the thermo- and haloclines. No larvae were found within the upper 2 m. This finding may have important bearings on the larval transport by currents and increase the possibility for retention of larvae, but was not tested inthis study. The highest catches of both H. gammarus and N. norveigicus were obtained during August. The trap appears to be well suited for investigating small-scale vertical distribution during the dark period, and for collecting animals in good condition. However, the trap did notcatch all larval stages, and the relation between light intensity (both natural and trap light) and catch ability is unknown. |
format |
Article in Journal/Newspaper |
author |
V Øresland |
author_facet |
V Øresland |
author_sort |
V Øresland |
title |
Description of the IMR Standard Light Trap and the Vertical Distribution of Some Decapod Larvae (Homarus and Nephrops) |
title_short |
Description of the IMR Standard Light Trap and the Vertical Distribution of Some Decapod Larvae (Homarus and Nephrops) |
title_full |
Description of the IMR Standard Light Trap and the Vertical Distribution of Some Decapod Larvae (Homarus and Nephrops) |
title_fullStr |
Description of the IMR Standard Light Trap and the Vertical Distribution of Some Decapod Larvae (Homarus and Nephrops) |
title_full_unstemmed |
Description of the IMR Standard Light Trap and the Vertical Distribution of Some Decapod Larvae (Homarus and Nephrops) |
title_sort |
description of the imr standard light trap and the vertical distribution of some decapod larvae (homarus and nephrops) |
publisher |
Western Indian Ocean Journal of Marine Science |
publishDate |
2009 |
url |
http://ajol.info/index.php/wiojms/article/view/48249 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
European lobster Homarus gammarus |
genre_facet |
European lobster Homarus gammarus |
op_source |
Western Indian Ocean Journal of Marine Science; Vol 6, No 2 (2008) |
op_relation |
http://ajol.info/index.php/wiojms/article/view/48249 |
_version_ |
1766404839314554880 |