Investigating the performance of a roller footgear in the offshore shrimp fishery of Eastern Canada using underwater video
| Autor: | Tomas Araya-Schmidt, George Legge, Harold DeLouche, Kelly Moret, Paul D. Winger, M.R. Santos, Shannon M. Bayse |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
biology 010604 marine biology & hydrobiology Shrimp fishery 04 agricultural and veterinary sciences Aquatic Science biology.organism_classification 01 natural sciences Bottom trawling Pandalus borealis Shrimp Fishery Benthic zone 040102 fisheries 0401 agriculture forestry and fisheries Submarine pipeline Underwater Geology Seabed |
| Zdroj: | Fisheries Research. 240:105968 |
| ISSN: | 0165-7836 |
| DOI: | 10.1016/j.fishres.2021.105968 |
| Popis: | The offshore Northern shrimp (Pandalus borealis) fishery in Eastern Canada is currently harvested by factory freezer vessels using bottom trawls. This fishery is a major contributor to the regions’ economy, however, bottom trawling typically is associated with negative benthic impacts. We evaluated the at-sea engineering performance of a roller footgear using underwater cameras. This footgear is designed to roll, limiting negative benthic impacts and reducing fuel usage, compared to non-rolling rockhopper footgear. We describe and document a new technique for measuring the time to complete a rotation in seconds (TCR) of bosom and quarter-wing footgear sections on hard, mixed, and soft seabed. Our results showed that footgear sections were rotating at extremely low rates. Results predicted a statistically significant 184 % increase in TCR when comparing the bosom to the quarter-wing section (p = 0.035). TCR on hard seabed ranged from 23.6 s in the bosom to 43.4 s in the quarter-wing section, while mixed (from 169.0–311.1 s) and soft (from 862.6–1587.6 s) seabed types produced significantly longer TCR (p |
| Databáze: | OpenAIRE |
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