Metabarcoding gillnets to assess unaccounted catch depredation or escape
Abstract Gillnets are the world's most common net‐based fishing gear, comprising walls of light mesh designed to entangle fish. Gillnets are often retrieved with holes in the netting, which means some animals escape or are depredated unseen, but with some mortality. To effectively manage fisher...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-01-01
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| Series: | Environmental DNA |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/edn3.234 |
| _version_ | 1798024852835139584 |
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| author | Mark deBruyn Matteo Barbato Matt K. Broadhurst |
| author_facet | Mark deBruyn Matteo Barbato Matt K. Broadhurst |
| author_sort | Mark deBruyn |
| collection | DOAJ |
| description | Abstract Gillnets are the world's most common net‐based fishing gear, comprising walls of light mesh designed to entangle fish. Gillnets are often retrieved with holes in the netting, which means some animals escape or are depredated unseen, but with some mortality. To effectively manage fisheries around the world, information is required on not only the harvested and discarded mortalities, but also problematic interactions and mortalities caused by the fishing gear and especially those involving protected species. This study sought to assess a novel method for determining such interactions by sampling five adjacent pieces of netting around each of ten holes in two bather‐protection polyethylene gillnets for environmental DNA or “eDNA”. Here we show that eDNA correctly identified all previously entangled‐and‐landed species. Also, eDNA from three uncaptured taxa were recorded: bull shark, Carcharhinus leucas, white shark, Carcharodon carcharias and dolphins (Delphindae), illustrating the potential to reveal previously cryptic gillnet interactions. We propose that as scientific methods evolve and autonomous real‐time DNA surveillance becomes routine, eDNA testing of fishing gears and vessels could provide a novel, complementary fishery‐monitoring tool. |
| first_indexed | 2024-04-11T18:10:28Z |
| format | Article |
| id | doaj.art-08e6af1cd0d4451c9569adedacfbd822 |
| institution | Directory Open Access Journal |
| issn | 2637-4943 |
| language | English |
| last_indexed | 2024-04-11T18:10:28Z |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Environmental DNA |
| spelling | doaj.art-08e6af1cd0d4451c9569adedacfbd8222022-12-22T04:10:09ZengWileyEnvironmental DNA2637-49432022-01-014115716610.1002/edn3.234Metabarcoding gillnets to assess unaccounted catch depredation or escapeMark deBruyn0Matteo Barbato1Matt K. Broadhurst2School of Life and Environmental Sciences The University of Sydney Sydney NSW AustraliaSchool of Life and Environmental Sciences The University of Sydney Sydney NSW AustraliaNSW Department of Primary Industries, Fisheries Conservation Technology Unit, National Marine Science Centre Southern Cross University Coffs Harbour NSW AustraliaAbstract Gillnets are the world's most common net‐based fishing gear, comprising walls of light mesh designed to entangle fish. Gillnets are often retrieved with holes in the netting, which means some animals escape or are depredated unseen, but with some mortality. To effectively manage fisheries around the world, information is required on not only the harvested and discarded mortalities, but also problematic interactions and mortalities caused by the fishing gear and especially those involving protected species. This study sought to assess a novel method for determining such interactions by sampling five adjacent pieces of netting around each of ten holes in two bather‐protection polyethylene gillnets for environmental DNA or “eDNA”. Here we show that eDNA correctly identified all previously entangled‐and‐landed species. Also, eDNA from three uncaptured taxa were recorded: bull shark, Carcharhinus leucas, white shark, Carcharodon carcharias and dolphins (Delphindae), illustrating the potential to reveal previously cryptic gillnet interactions. We propose that as scientific methods evolve and autonomous real‐time DNA surveillance becomes routine, eDNA testing of fishing gears and vessels could provide a novel, complementary fishery‐monitoring tool.https://doi.org/10.1002/edn3.234fisheriesforensicsillegalmetabarcodingtrace DNAillegal, unreported and unregulated (IUU) fishing |
| spellingShingle | Mark deBruyn Matteo Barbato Matt K. Broadhurst Metabarcoding gillnets to assess unaccounted catch depredation or escape Environmental DNA fisheries forensics illegal metabarcoding trace DNA illegal, unreported and unregulated (IUU) fishing |
| title | Metabarcoding gillnets to assess unaccounted catch depredation or escape |
| title_full | Metabarcoding gillnets to assess unaccounted catch depredation or escape |
| title_fullStr | Metabarcoding gillnets to assess unaccounted catch depredation or escape |
| title_full_unstemmed | Metabarcoding gillnets to assess unaccounted catch depredation or escape |
| title_short | Metabarcoding gillnets to assess unaccounted catch depredation or escape |
| title_sort | metabarcoding gillnets to assess unaccounted catch depredation or escape |
| topic | fisheries forensics illegal metabarcoding trace DNA illegal, unreported and unregulated (IUU) fishing |
| url | https://doi.org/10.1002/edn3.234 |
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