VERDA: A Multisampler Tool for Mesopelagic Nets
Different types and systems to discriminate plankton samples at different strata in the water column have been developed in recent decades. For sampling at sufficient depth, opening and closing zooplankton multinets are ideal because there is no contamination of one sample with organisms of the prev...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/11/1/72 |
| _version_ | 1827624360876179456 |
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| author | Arturo Castellón María Pilar Olivar |
| author_facet | Arturo Castellón María Pilar Olivar |
| author_sort | Arturo Castellón |
| collection | DOAJ |
| description | Different types and systems to discriminate plankton samples at different strata in the water column have been developed in recent decades. For sampling at sufficient depth, opening and closing zooplankton multinets are ideal because there is no contamination of one sample with organisms of the previous one. However, for bigger nets, such as those used to collect micronektonic organism, it is difficult to use multiple net units, and multiple cod ends are preferred because of their simplicity, but with the problem of sample contamination from having a common net passageway. We present here a cod-end Multisampler design, VERDA, that uses a carrousel-like system. Similar to some sediment traps, the system works like a revolver with six or eight compartments whose turning mechanism is triggered when the net arrives to a programmed depth level. This prototype was built with inexpensive and recycled components and electronics similar to Arduino<sup>®</sup> and Teensy PCB to carry out electronic control. The net we used for testing the equipment was a mid-size midwater trawl of ca. 30 m<sup>2</sup> and total length of 58 m that works with a single towing cable and no doors. The overall system is useful for all type of ships, due to the relatively easy deployment operations and because the Multisampler does not need electrical cable or acoustics. In our case, we used a Marport<sup>®</sup> (Reykjavik Iceland) and Scanmar (Åsgårdstrand, Norway) sensors for real-time depth monitoring and opening distance. |
| first_indexed | 2024-03-09T12:06:34Z |
| format | Article |
| id | doaj.art-4be97e621637486885862aa20a5e41eb |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T12:06:34Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-4be97e621637486885862aa20a5e41eb2023-11-30T22:56:46ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-01-011117210.3390/jmse11010072VERDA: A Multisampler Tool for Mesopelagic NetsArturo Castellón0María Pilar Olivar1Unidad de Tecnología Marina (UTM), Consejo Superior de Investigaciones Científicas (CSIC), Passeig Marítim 37–49, 08003 Barcelona, SpainInstitut de Ciències del Mar (ICM), Consejo Superior de Investigaciones Científicas (CSIC), Passeig Marítim 37–49, 08003 Barcelona, SpainDifferent types and systems to discriminate plankton samples at different strata in the water column have been developed in recent decades. For sampling at sufficient depth, opening and closing zooplankton multinets are ideal because there is no contamination of one sample with organisms of the previous one. However, for bigger nets, such as those used to collect micronektonic organism, it is difficult to use multiple net units, and multiple cod ends are preferred because of their simplicity, but with the problem of sample contamination from having a common net passageway. We present here a cod-end Multisampler design, VERDA, that uses a carrousel-like system. Similar to some sediment traps, the system works like a revolver with six or eight compartments whose turning mechanism is triggered when the net arrives to a programmed depth level. This prototype was built with inexpensive and recycled components and electronics similar to Arduino<sup>®</sup> and Teensy PCB to carry out electronic control. The net we used for testing the equipment was a mid-size midwater trawl of ca. 30 m<sup>2</sup> and total length of 58 m that works with a single towing cable and no doors. The overall system is useful for all type of ships, due to the relatively easy deployment operations and because the Multisampler does not need electrical cable or acoustics. In our case, we used a Marport<sup>®</sup> (Reykjavik Iceland) and Scanmar (Åsgårdstrand, Norway) sensors for real-time depth monitoring and opening distance.https://www.mdpi.com/2077-1312/11/1/72stratified samplingmicronektonmidwater trawlsMesopelagos |
| spellingShingle | Arturo Castellón María Pilar Olivar VERDA: A Multisampler Tool for Mesopelagic Nets Journal of Marine Science and Engineering stratified sampling micronekton midwater trawls Mesopelagos |
| title | VERDA: A Multisampler Tool for Mesopelagic Nets |
| title_full | VERDA: A Multisampler Tool for Mesopelagic Nets |
| title_fullStr | VERDA: A Multisampler Tool for Mesopelagic Nets |
| title_full_unstemmed | VERDA: A Multisampler Tool for Mesopelagic Nets |
| title_short | VERDA: A Multisampler Tool for Mesopelagic Nets |
| title_sort | verda a multisampler tool for mesopelagic nets |
| topic | stratified sampling micronekton midwater trawls Mesopelagos |
| url | https://www.mdpi.com/2077-1312/11/1/72 |
| work_keys_str_mv | AT arturocastellon verdaamultisamplertoolformesopelagicnets AT mariapilarolivar verdaamultisamplertoolformesopelagicnets |